<?xml version="1.0" encoding="UTF-8"?>

<CompactData xmlns="http://www.SDMX.org/resources/SDMXML/schemas/v2_0/message" xmlns:bbk="http://www.bundesbank.de/statistik/zeitreihen/BBKcompact" xmlns:compact="http://www.SDMX.org/resources/SDMXML/schemas/v2_0/compact" xmlns:xsl="http://www.w3.org/2001/XMLSchema-instance" xsl:schemaLocation="http://www.SDMX.org/resources/SDMXML/schemas/v2_0/message schemas/SDMXMessage.xsd http://www.bundesbank.de/statistik/zeitreihen/bbkcompact schemas/BBKCompactData.xsd http://www.SDMX.org/resources/SDMXML/schemas/v2_0/compact schemas/SDMXCompactData.xsd">
  <Header>
    <ID>BBSIS_D_I_ZST_B1_EUR_S1311_B_A604__Z_R_A_A__Z__Z_A</ID>
    <Test>false</Test>
    <Truncated>false</Truncated>
    <Prepared>2026-04-07T21:40:42</Prepared>
    <Sender id="BBK">
      <Name xml:lang="de">Deutsche Bundesbank</Name>
      <Contact>
        <Email>presse-information@bundesbank.de</Email>
      </Contact>
    </Sender>
  </Header>
  <bbk:DataSet datasetID="BBK_SEIS">
    <bbk:Series FREQ="D" BBK_ID="BBSIS.D.I.ZST.B1.EUR.S1311.B.A604._Z.R.A.A._Z._Z.A" DECIMALS="5" UNIT="" UNIT_MULT="0" BBK_TITLE="Zinsstrukturkurve / Parameter Beta1 (Svensson-Methode) /          Börsennotierte Bundeswertpapiere / Tageswerte" BBK_TITLE_ENG="Term structure of interest rates on listed Federalsecurities (method by Svensson) / Parameter Beta1 /daily data" BBK_COMM_GEN="Monatsreihe siehe WZ9802. Bis Juli 1997 liegen lediglich Ultimowerte vor.">
      <bbk:Obs TIME_PERIOD="2026-04-07" OBS_VALUE="-1.93123" BBK_DIFF_A="7.4E-4"/>
      <bbk:Obs TIME_PERIOD="2026-04-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2026-04-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2026-04-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2026-04-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2026-04-02" OBS_VALUE="-1.93197" BBK_DIFF_A="-0.11144"/>
      <bbk:Obs TIME_PERIOD="2026-04-01" OBS_VALUE="-1.82053" BBK_DIFF_A="0.15406"/>
      <bbk:Obs TIME_PERIOD="2026-03-31" OBS_VALUE="-1.97459" BBK_DIFF_A="0.06461"/>
      <bbk:Obs TIME_PERIOD="2026-03-30" OBS_VALUE="-2.0392" BBK_DIFF_A="-0.03803"/>
      <bbk:Obs TIME_PERIOD="2026-03-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2026-03-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2026-03-27" OBS_VALUE="-2.00117" BBK_DIFF_A="-0.09678"/>
      <bbk:Obs TIME_PERIOD="2026-03-26" OBS_VALUE="-1.90439" BBK_DIFF_A="0.03783"/>
      <bbk:Obs TIME_PERIOD="2026-03-25" OBS_VALUE="-1.94222" BBK_DIFF_A="0.30567"/>
      <bbk:Obs TIME_PERIOD="2026-03-24" OBS_VALUE="-2.24789" BBK_DIFF_A="0.3002"/>
      <bbk:Obs TIME_PERIOD="2026-03-23" OBS_VALUE="-2.54809" BBK_DIFF_A="-0.25181"/>
      <bbk:Obs TIME_PERIOD="2026-03-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2026-03-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2026-03-20" OBS_VALUE="-2.29628" BBK_DIFF_A="-0.2676"/>
      <bbk:Obs TIME_PERIOD="2026-03-19" OBS_VALUE="-2.02868" BBK_DIFF_A="-4.23315"/>
      <bbk:Obs TIME_PERIOD="2026-03-18" OBS_VALUE="2.20447" BBK_DIFF_A="0.01191"/>
      <bbk:Obs TIME_PERIOD="2026-03-17" OBS_VALUE="2.19256" BBK_DIFF_A="-0.0048"/>
      <bbk:Obs TIME_PERIOD="2026-03-16" OBS_VALUE="2.19736" BBK_DIFF_A="-0.0093"/>
      <bbk:Obs TIME_PERIOD="2026-03-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2026-03-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2026-03-13" OBS_VALUE="2.20666" BBK_DIFF_A="0.01583"/>
      <bbk:Obs TIME_PERIOD="2026-03-12" OBS_VALUE="2.19083" BBK_DIFF_A="0.31112"/>
      <bbk:Obs TIME_PERIOD="2026-03-11" OBS_VALUE="1.87971" BBK_DIFF_A="0.41436"/>
      <bbk:Obs TIME_PERIOD="2026-03-10" OBS_VALUE="1.46535" BBK_DIFF_A="-0.30628"/>
      <bbk:Obs TIME_PERIOD="2026-03-09" OBS_VALUE="1.77163" BBK_DIFF_A="1.09071"/>
      <bbk:Obs TIME_PERIOD="2026-03-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2026-03-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2026-03-06" OBS_VALUE="0.68092" BBK_DIFF_A="0.79768"/>
      <bbk:Obs TIME_PERIOD="2026-03-05" OBS_VALUE="-0.11676" BBK_DIFF_A="-0.01335"/>
      <bbk:Obs TIME_PERIOD="2026-03-04" OBS_VALUE="-0.10341" BBK_DIFF_A="-0.1084"/>
      <bbk:Obs TIME_PERIOD="2026-03-03" OBS_VALUE="0.00499" BBK_DIFF_A="1.23285"/>
      <bbk:Obs TIME_PERIOD="2026-03-02" OBS_VALUE="-1.22786" BBK_DIFF_A="0.07215"/>
      <bbk:Obs TIME_PERIOD="2026-03-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2026-02-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2026-02-27" OBS_VALUE="-1.30001" BBK_DIFF_A="0.01634"/>
      <bbk:Obs TIME_PERIOD="2026-02-26" OBS_VALUE="-1.31635" BBK_DIFF_A="0.00389"/>
      <bbk:Obs TIME_PERIOD="2026-02-25" OBS_VALUE="-1.32024" BBK_DIFF_A="-0.00118"/>
      <bbk:Obs TIME_PERIOD="2026-02-24" OBS_VALUE="-1.31906" BBK_DIFF_A="0.01387"/>
      <bbk:Obs TIME_PERIOD="2026-02-23" OBS_VALUE="-1.33293" BBK_DIFF_A="-0.01785"/>
      <bbk:Obs TIME_PERIOD="2026-02-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2026-02-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2026-02-20" OBS_VALUE="-1.31508" BBK_DIFF_A="0.06906"/>
      <bbk:Obs TIME_PERIOD="2026-02-19" OBS_VALUE="-1.38414" BBK_DIFF_A="0.00712"/>
      <bbk:Obs TIME_PERIOD="2026-02-18" OBS_VALUE="-1.39126" BBK_DIFF_A="0.03493"/>
      <bbk:Obs TIME_PERIOD="2026-02-17" OBS_VALUE="-1.42619" BBK_DIFF_A="-0.03385"/>
      <bbk:Obs TIME_PERIOD="2026-02-16" OBS_VALUE="-1.39234" BBK_DIFF_A="0.03346"/>
      <bbk:Obs TIME_PERIOD="2026-02-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2026-02-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2026-02-13" OBS_VALUE="-1.4258" BBK_DIFF_A="-0.00284"/>
      <bbk:Obs TIME_PERIOD="2026-02-12" OBS_VALUE="-1.42296" BBK_DIFF_A="0.01099"/>
      <bbk:Obs TIME_PERIOD="2026-02-11" OBS_VALUE="-1.43395" BBK_DIFF_A="0.09645"/>
      <bbk:Obs TIME_PERIOD="2026-02-10" OBS_VALUE="-1.5304" BBK_DIFF_A="0.01647"/>
      <bbk:Obs TIME_PERIOD="2026-02-09" OBS_VALUE="-1.54687" BBK_DIFF_A="-0.03903"/>
      <bbk:Obs TIME_PERIOD="2026-02-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2026-02-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2026-02-06" OBS_VALUE="-1.50784" BBK_DIFF_A="-0.00823"/>
      <bbk:Obs TIME_PERIOD="2026-02-05" OBS_VALUE="-1.49961" BBK_DIFF_A="-0.03232"/>
      <bbk:Obs TIME_PERIOD="2026-02-04" OBS_VALUE="-1.46729" BBK_DIFF_A="0.01087"/>
      <bbk:Obs TIME_PERIOD="2026-02-03" OBS_VALUE="-1.47816" BBK_DIFF_A="-0.00619"/>
      <bbk:Obs TIME_PERIOD="2026-02-02" OBS_VALUE="-1.47197" BBK_DIFF_A="0.05579"/>
      <bbk:Obs TIME_PERIOD="2026-02-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2026-01-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2026-01-30" OBS_VALUE="-1.52776" BBK_DIFF_A="0.03379"/>
      <bbk:Obs TIME_PERIOD="2026-01-29" OBS_VALUE="-1.56155" BBK_DIFF_A="0.0093"/>
      <bbk:Obs TIME_PERIOD="2026-01-28" OBS_VALUE="-1.57085" BBK_DIFF_A="-0.16732"/>
      <bbk:Obs TIME_PERIOD="2026-01-27" OBS_VALUE="-1.40353" BBK_DIFF_A="-0.01991"/>
      <bbk:Obs TIME_PERIOD="2026-01-26" OBS_VALUE="-1.38362" BBK_DIFF_A="0.00246"/>
      <bbk:Obs TIME_PERIOD="2026-01-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2026-01-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2026-01-23" OBS_VALUE="-1.38608" BBK_DIFF_A="0.06581"/>
      <bbk:Obs TIME_PERIOD="2026-01-22" OBS_VALUE="-1.45189" BBK_DIFF_A="0.14056"/>
      <bbk:Obs TIME_PERIOD="2026-01-21" OBS_VALUE="-1.59245" BBK_DIFF_A="-0.06631"/>
      <bbk:Obs TIME_PERIOD="2026-01-20" OBS_VALUE="-1.52614" BBK_DIFF_A="-0.17835"/>
      <bbk:Obs TIME_PERIOD="2026-01-19" OBS_VALUE="-1.34779" BBK_DIFF_A="-0.16063"/>
      <bbk:Obs TIME_PERIOD="2026-01-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2026-01-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2026-01-16" OBS_VALUE="-1.18716" BBK_DIFF_A="0.1236"/>
      <bbk:Obs TIME_PERIOD="2026-01-15" OBS_VALUE="-1.31076" BBK_DIFF_A="0.05037"/>
      <bbk:Obs TIME_PERIOD="2026-01-14" OBS_VALUE="-1.36113" BBK_DIFF_A="0.00305"/>
      <bbk:Obs TIME_PERIOD="2026-01-13" OBS_VALUE="-1.36418" BBK_DIFF_A="-0.08033"/>
      <bbk:Obs TIME_PERIOD="2026-01-12" OBS_VALUE="-1.28385" BBK_DIFF_A="0.03387"/>
      <bbk:Obs TIME_PERIOD="2026-01-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2026-01-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2026-01-09" OBS_VALUE="-1.31772" BBK_DIFF_A="0.07596"/>
      <bbk:Obs TIME_PERIOD="2026-01-08" OBS_VALUE="-1.39368" BBK_DIFF_A="0.04912"/>
      <bbk:Obs TIME_PERIOD="2026-01-07" OBS_VALUE="-1.4428" BBK_DIFF_A="0.09278"/>
      <bbk:Obs TIME_PERIOD="2026-01-06" OBS_VALUE="-1.53558" BBK_DIFF_A="-0.06968"/>
      <bbk:Obs TIME_PERIOD="2026-01-05" OBS_VALUE="-1.4659" BBK_DIFF_A="-0.09089"/>
      <bbk:Obs TIME_PERIOD="2026-01-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2026-01-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2026-01-02" OBS_VALUE="-1.37501" BBK_DIFF_A="-0.05056"/>
      <bbk:Obs TIME_PERIOD="2026-01-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-12-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-12-30" OBS_VALUE="-1.32445" BBK_DIFF_A="-0.00806"/>
      <bbk:Obs TIME_PERIOD="2025-12-29" OBS_VALUE="-1.31639" BBK_DIFF_A="-0.00209"/>
      <bbk:Obs TIME_PERIOD="2025-12-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-12-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-12-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-12-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-12-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-12-23" OBS_VALUE="-1.3143" BBK_DIFF_A="0.06617"/>
      <bbk:Obs TIME_PERIOD="2025-12-22" OBS_VALUE="-1.38047" BBK_DIFF_A="-0.00512"/>
      <bbk:Obs TIME_PERIOD="2025-12-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-12-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-12-19" OBS_VALUE="-1.37535" BBK_DIFF_A="-0.1159"/>
      <bbk:Obs TIME_PERIOD="2025-12-18" OBS_VALUE="-1.25945" BBK_DIFF_A="0.01435"/>
      <bbk:Obs TIME_PERIOD="2025-12-17" OBS_VALUE="-1.2738" BBK_DIFF_A="-0.18179"/>
      <bbk:Obs TIME_PERIOD="2025-12-16" OBS_VALUE="-1.09201" BBK_DIFF_A="-0.01542"/>
      <bbk:Obs TIME_PERIOD="2025-12-15" OBS_VALUE="-1.07659" BBK_DIFF_A="-0.01531"/>
      <bbk:Obs TIME_PERIOD="2025-12-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-12-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-12-12" OBS_VALUE="-1.06128" BBK_DIFF_A="-0.02365"/>
      <bbk:Obs TIME_PERIOD="2025-12-11" OBS_VALUE="-1.03763" BBK_DIFF_A="0.12242"/>
      <bbk:Obs TIME_PERIOD="2025-12-10" OBS_VALUE="-1.16005" BBK_DIFF_A="-0.01624"/>
      <bbk:Obs TIME_PERIOD="2025-12-09" OBS_VALUE="-1.14381" BBK_DIFF_A="0.18407"/>
      <bbk:Obs TIME_PERIOD="2025-12-08" OBS_VALUE="-1.32788" BBK_DIFF_A="0.0821"/>
      <bbk:Obs TIME_PERIOD="2025-12-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-12-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-12-05" OBS_VALUE="-1.40998" BBK_DIFF_A="-0.04871"/>
      <bbk:Obs TIME_PERIOD="2025-12-04" OBS_VALUE="-1.36127" BBK_DIFF_A="-0.10209"/>
      <bbk:Obs TIME_PERIOD="2025-12-03" OBS_VALUE="-1.25918" BBK_DIFF_A="-0.11908"/>
      <bbk:Obs TIME_PERIOD="2025-12-02" OBS_VALUE="-1.1401" BBK_DIFF_A="-0.05682"/>
      <bbk:Obs TIME_PERIOD="2025-12-01" OBS_VALUE="-1.08328" BBK_DIFF_A="-0.04253"/>
      <bbk:Obs TIME_PERIOD="2025-11-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-11-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-11-28" OBS_VALUE="-1.04075" BBK_DIFF_A="0.09486"/>
      <bbk:Obs TIME_PERIOD="2025-11-27" OBS_VALUE="-1.13561" BBK_DIFF_A="0.0872"/>
      <bbk:Obs TIME_PERIOD="2025-11-26" OBS_VALUE="-1.22281" BBK_DIFF_A="0.00681"/>
      <bbk:Obs TIME_PERIOD="2025-11-25" OBS_VALUE="-1.22962" BBK_DIFF_A="0.04912"/>
      <bbk:Obs TIME_PERIOD="2025-11-24" OBS_VALUE="-1.27874" BBK_DIFF_A="0.06182"/>
      <bbk:Obs TIME_PERIOD="2025-11-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-11-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-11-21" OBS_VALUE="-1.34056" BBK_DIFF_A="0.00207"/>
      <bbk:Obs TIME_PERIOD="2025-11-20" OBS_VALUE="-1.34263" BBK_DIFF_A="-0.025"/>
      <bbk:Obs TIME_PERIOD="2025-11-19" OBS_VALUE="-1.31763" BBK_DIFF_A="-0.07517"/>
      <bbk:Obs TIME_PERIOD="2025-11-18" OBS_VALUE="-1.24246" BBK_DIFF_A="0.00645"/>
      <bbk:Obs TIME_PERIOD="2025-11-17" OBS_VALUE="-1.24891" BBK_DIFF_A="0.01493"/>
      <bbk:Obs TIME_PERIOD="2025-11-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-11-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-11-14" OBS_VALUE="-1.26384" BBK_DIFF_A="-0.20694"/>
      <bbk:Obs TIME_PERIOD="2025-11-13" OBS_VALUE="-1.0569" BBK_DIFF_A="0.02082"/>
      <bbk:Obs TIME_PERIOD="2025-11-12" OBS_VALUE="-1.07772" BBK_DIFF_A="0.00781"/>
      <bbk:Obs TIME_PERIOD="2025-11-11" OBS_VALUE="-1.08553" BBK_DIFF_A="0.01168"/>
      <bbk:Obs TIME_PERIOD="2025-11-10" OBS_VALUE="-1.09721" BBK_DIFF_A="-0.02638"/>
      <bbk:Obs TIME_PERIOD="2025-11-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-11-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-11-07" OBS_VALUE="-1.07083" BBK_DIFF_A="-0.01158"/>
      <bbk:Obs TIME_PERIOD="2025-11-06" OBS_VALUE="-1.05925" BBK_DIFF_A="-0.0109"/>
      <bbk:Obs TIME_PERIOD="2025-11-05" OBS_VALUE="-1.04835" BBK_DIFF_A="-0.01155"/>
      <bbk:Obs TIME_PERIOD="2025-11-04" OBS_VALUE="-1.0368" BBK_DIFF_A="-0.02749"/>
      <bbk:Obs TIME_PERIOD="2025-11-03" OBS_VALUE="-1.00931" BBK_DIFF_A="-0.03349"/>
      <bbk:Obs TIME_PERIOD="2025-11-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-11-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-10-31" OBS_VALUE="-0.97582" BBK_DIFF_A="-0.02016"/>
      <bbk:Obs TIME_PERIOD="2025-10-30" OBS_VALUE="-0.95566" BBK_DIFF_A="0.04339"/>
      <bbk:Obs TIME_PERIOD="2025-10-29" OBS_VALUE="-0.99905" BBK_DIFF_A="-0.00973"/>
      <bbk:Obs TIME_PERIOD="2025-10-28" OBS_VALUE="-0.98932" BBK_DIFF_A="0.03894"/>
      <bbk:Obs TIME_PERIOD="2025-10-27" OBS_VALUE="-1.02826" BBK_DIFF_A="0.02884"/>
      <bbk:Obs TIME_PERIOD="2025-10-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-10-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-10-24" OBS_VALUE="-1.0571" BBK_DIFF_A="-0.00943"/>
      <bbk:Obs TIME_PERIOD="2025-10-23" OBS_VALUE="-1.04767" BBK_DIFF_A="-0.06041"/>
      <bbk:Obs TIME_PERIOD="2025-10-22" OBS_VALUE="-0.98726" BBK_DIFF_A="0.03274"/>
      <bbk:Obs TIME_PERIOD="2025-10-21" OBS_VALUE="-1.02" BBK_DIFF_A="0.07451"/>
      <bbk:Obs TIME_PERIOD="2025-10-20" OBS_VALUE="-1.09451" BBK_DIFF_A="0.04994"/>
      <bbk:Obs TIME_PERIOD="2025-10-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-10-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-10-17" OBS_VALUE="-1.14445" BBK_DIFF_A="-0.1947"/>
      <bbk:Obs TIME_PERIOD="2025-10-16" OBS_VALUE="-0.94975" BBK_DIFF_A="0.1053"/>
      <bbk:Obs TIME_PERIOD="2025-10-15" OBS_VALUE="-1.05505" BBK_DIFF_A="0.06417"/>
      <bbk:Obs TIME_PERIOD="2025-10-14" OBS_VALUE="-1.11922" BBK_DIFF_A="-0.05412"/>
      <bbk:Obs TIME_PERIOD="2025-10-13" OBS_VALUE="-1.0651" BBK_DIFF_A="0.0789"/>
      <bbk:Obs TIME_PERIOD="2025-10-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-10-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-10-10" OBS_VALUE="-1.144" BBK_DIFF_A="0.0613"/>
      <bbk:Obs TIME_PERIOD="2025-10-09" OBS_VALUE="-1.2053" BBK_DIFF_A="-3.0E-4"/>
      <bbk:Obs TIME_PERIOD="2025-10-08" OBS_VALUE="-1.205" BBK_DIFF_A="0.04787"/>
      <bbk:Obs TIME_PERIOD="2025-10-07" OBS_VALUE="-1.25287" BBK_DIFF_A="-0.0089"/>
      <bbk:Obs TIME_PERIOD="2025-10-06" OBS_VALUE="-1.24397" BBK_DIFF_A="-0.20388"/>
      <bbk:Obs TIME_PERIOD="2025-10-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-10-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-10-03" OBS_VALUE="-1.04009" BBK_DIFF_A="-0.00877"/>
      <bbk:Obs TIME_PERIOD="2025-10-02" OBS_VALUE="-1.03132" BBK_DIFF_A="0.07238"/>
      <bbk:Obs TIME_PERIOD="2025-10-01" OBS_VALUE="-1.1037" BBK_DIFF_A="-0.03634"/>
      <bbk:Obs TIME_PERIOD="2025-09-30" OBS_VALUE="-1.06736" BBK_DIFF_A="0.06"/>
      <bbk:Obs TIME_PERIOD="2025-09-29" OBS_VALUE="-1.12736" BBK_DIFF_A="0.02607"/>
      <bbk:Obs TIME_PERIOD="2025-09-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-09-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-09-26" OBS_VALUE="-1.15343" BBK_DIFF_A="0.0335"/>
      <bbk:Obs TIME_PERIOD="2025-09-25" OBS_VALUE="-1.18693" BBK_DIFF_A="-0.00381"/>
      <bbk:Obs TIME_PERIOD="2025-09-24" OBS_VALUE="-1.18312" BBK_DIFF_A="0.05589"/>
      <bbk:Obs TIME_PERIOD="2025-09-23" OBS_VALUE="-1.23901" BBK_DIFF_A="-0.02688"/>
      <bbk:Obs TIME_PERIOD="2025-09-22" OBS_VALUE="-1.21213" BBK_DIFF_A="-0.02555"/>
      <bbk:Obs TIME_PERIOD="2025-09-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-09-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-09-19" OBS_VALUE="-1.18658" BBK_DIFF_A="-0.07532"/>
      <bbk:Obs TIME_PERIOD="2025-09-18" OBS_VALUE="-1.11126" BBK_DIFF_A="0.01762"/>
      <bbk:Obs TIME_PERIOD="2025-09-17" OBS_VALUE="-1.12888" BBK_DIFF_A="-0.05526"/>
      <bbk:Obs TIME_PERIOD="2025-09-16" OBS_VALUE="-1.07362" BBK_DIFF_A="-0.01796"/>
      <bbk:Obs TIME_PERIOD="2025-09-15" OBS_VALUE="-1.05566" BBK_DIFF_A="-0.06234"/>
      <bbk:Obs TIME_PERIOD="2025-09-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-09-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-09-12" OBS_VALUE="-0.99332" BBK_DIFF_A="0.16072"/>
      <bbk:Obs TIME_PERIOD="2025-09-11" OBS_VALUE="-1.15404" BBK_DIFF_A="0.06301"/>
      <bbk:Obs TIME_PERIOD="2025-09-10" OBS_VALUE="-1.21705" BBK_DIFF_A="0.07976"/>
      <bbk:Obs TIME_PERIOD="2025-09-09" OBS_VALUE="-1.29681" BBK_DIFF_A="0.00106"/>
      <bbk:Obs TIME_PERIOD="2025-09-08" OBS_VALUE="-1.29787" BBK_DIFF_A="0.01336"/>
      <bbk:Obs TIME_PERIOD="2025-09-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-09-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-09-05" OBS_VALUE="-1.31123" BBK_DIFF_A="0.07602"/>
      <bbk:Obs TIME_PERIOD="2025-09-04" OBS_VALUE="-1.38725" BBK_DIFF_A="0.06565"/>
      <bbk:Obs TIME_PERIOD="2025-09-03" OBS_VALUE="-1.4529" BBK_DIFF_A="-0.05317"/>
      <bbk:Obs TIME_PERIOD="2025-09-02" OBS_VALUE="-1.39973" BBK_DIFF_A="0.00183"/>
      <bbk:Obs TIME_PERIOD="2025-09-01" OBS_VALUE="-1.40156" BBK_DIFF_A="-0.06486"/>
      <bbk:Obs TIME_PERIOD="2025-08-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-08-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-08-29" OBS_VALUE="-1.3367" BBK_DIFF_A="-0.01203"/>
      <bbk:Obs TIME_PERIOD="2025-08-28" OBS_VALUE="-1.32467" BBK_DIFF_A="-0.03541"/>
      <bbk:Obs TIME_PERIOD="2025-08-27" OBS_VALUE="-1.28926" BBK_DIFF_A="0.0341"/>
      <bbk:Obs TIME_PERIOD="2025-08-26" OBS_VALUE="-1.32336" BBK_DIFF_A="-0.03156"/>
      <bbk:Obs TIME_PERIOD="2025-08-25" OBS_VALUE="-1.2918" BBK_DIFF_A="-0.00937"/>
      <bbk:Obs TIME_PERIOD="2025-08-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-08-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-08-22" OBS_VALUE="-1.28243" BBK_DIFF_A="-0.01556"/>
      <bbk:Obs TIME_PERIOD="2025-08-21" OBS_VALUE="-1.26687" BBK_DIFF_A="0.02695"/>
      <bbk:Obs TIME_PERIOD="2025-08-20" OBS_VALUE="-1.29382" BBK_DIFF_A="0.08577"/>
      <bbk:Obs TIME_PERIOD="2025-08-19" OBS_VALUE="-1.37959" BBK_DIFF_A="-0.07009"/>
      <bbk:Obs TIME_PERIOD="2025-08-18" OBS_VALUE="-1.3095" BBK_DIFF_A="0.02274"/>
      <bbk:Obs TIME_PERIOD="2025-08-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-08-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-08-15" OBS_VALUE="-1.33224" BBK_DIFF_A="-0.16216"/>
      <bbk:Obs TIME_PERIOD="2025-08-14" OBS_VALUE="-1.17008" BBK_DIFF_A="0.04456"/>
      <bbk:Obs TIME_PERIOD="2025-08-13" OBS_VALUE="-1.21464" BBK_DIFF_A="-0.07975"/>
      <bbk:Obs TIME_PERIOD="2025-08-12" OBS_VALUE="-1.13489" BBK_DIFF_A="-0.04959"/>
      <bbk:Obs TIME_PERIOD="2025-08-11" OBS_VALUE="-1.0853" BBK_DIFF_A="-0.0486"/>
      <bbk:Obs TIME_PERIOD="2025-08-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-08-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-08-08" OBS_VALUE="-1.0367" BBK_DIFF_A="0.05156"/>
      <bbk:Obs TIME_PERIOD="2025-08-07" OBS_VALUE="-1.08826" BBK_DIFF_A="-0.01962"/>
      <bbk:Obs TIME_PERIOD="2025-08-06" OBS_VALUE="-1.06864" BBK_DIFF_A="-0.02145"/>
      <bbk:Obs TIME_PERIOD="2025-08-05" OBS_VALUE="-1.04719" BBK_DIFF_A="0.08877"/>
      <bbk:Obs TIME_PERIOD="2025-08-04" OBS_VALUE="-1.13596" BBK_DIFF_A="-0.09128"/>
      <bbk:Obs TIME_PERIOD="2025-08-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-08-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-08-01" OBS_VALUE="-1.04468" BBK_DIFF_A="-0.06755"/>
      <bbk:Obs TIME_PERIOD="2025-07-31" OBS_VALUE="-0.97713" BBK_DIFF_A="0.09711"/>
      <bbk:Obs TIME_PERIOD="2025-07-30" OBS_VALUE="-1.07424" BBK_DIFF_A="0.05242"/>
      <bbk:Obs TIME_PERIOD="2025-07-29" OBS_VALUE="-1.12666" BBK_DIFF_A="-0.0538"/>
      <bbk:Obs TIME_PERIOD="2025-07-28" OBS_VALUE="-1.07286" BBK_DIFF_A="0.04837"/>
      <bbk:Obs TIME_PERIOD="2025-07-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-07-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-07-25" OBS_VALUE="-1.12123" BBK_DIFF_A="0.07493"/>
      <bbk:Obs TIME_PERIOD="2025-07-24" OBS_VALUE="-1.19616" BBK_DIFF_A="0.04257"/>
      <bbk:Obs TIME_PERIOD="2025-07-23" OBS_VALUE="-1.23873" BBK_DIFF_A="-0.01564"/>
      <bbk:Obs TIME_PERIOD="2025-07-22" OBS_VALUE="-1.22309" BBK_DIFF_A="0.07336"/>
      <bbk:Obs TIME_PERIOD="2025-07-21" OBS_VALUE="-1.29645" BBK_DIFF_A="0.00812"/>
      <bbk:Obs TIME_PERIOD="2025-07-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-07-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-07-18" OBS_VALUE="-1.30457" BBK_DIFF_A="-2.29119"/>
      <bbk:Obs TIME_PERIOD="2025-07-17" OBS_VALUE="0.98662" BBK_DIFF_A="0.05551"/>
      <bbk:Obs TIME_PERIOD="2025-07-16" OBS_VALUE="0.93111" BBK_DIFF_A="-0.01653"/>
      <bbk:Obs TIME_PERIOD="2025-07-15" OBS_VALUE="0.94764" BBK_DIFF_A="0.02769"/>
      <bbk:Obs TIME_PERIOD="2025-07-14" OBS_VALUE="0.91995" BBK_DIFF_A="0.02569"/>
      <bbk:Obs TIME_PERIOD="2025-07-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-07-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-07-11" OBS_VALUE="0.89426" BBK_DIFF_A="-0.05385"/>
      <bbk:Obs TIME_PERIOD="2025-07-10" OBS_VALUE="0.94811" BBK_DIFF_A="0.02529"/>
      <bbk:Obs TIME_PERIOD="2025-07-09" OBS_VALUE="0.92282" BBK_DIFF_A="0.23758"/>
      <bbk:Obs TIME_PERIOD="2025-07-08" OBS_VALUE="0.68524" BBK_DIFF_A="-0.36705"/>
      <bbk:Obs TIME_PERIOD="2025-07-07" OBS_VALUE="1.05229" BBK_DIFF_A="-0.00463"/>
      <bbk:Obs TIME_PERIOD="2025-07-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-07-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-07-04" OBS_VALUE="1.05692" BBK_DIFF_A="0.10914"/>
      <bbk:Obs TIME_PERIOD="2025-07-03" OBS_VALUE="0.94778" BBK_DIFF_A="0.09209"/>
      <bbk:Obs TIME_PERIOD="2025-07-02" OBS_VALUE="0.85569" BBK_DIFF_A="-0.07748"/>
      <bbk:Obs TIME_PERIOD="2025-07-01" OBS_VALUE="0.93317" BBK_DIFF_A="0.09418"/>
      <bbk:Obs TIME_PERIOD="2025-06-30" OBS_VALUE="0.83899" BBK_DIFF_A="-0.12185"/>
      <bbk:Obs TIME_PERIOD="2025-06-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-06-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-06-27" OBS_VALUE="0.96084" BBK_DIFF_A="0.25329"/>
      <bbk:Obs TIME_PERIOD="2025-06-26" OBS_VALUE="0.70755" BBK_DIFF_A="-0.10085"/>
      <bbk:Obs TIME_PERIOD="2025-06-25" OBS_VALUE="0.8084" BBK_DIFF_A="-0.21756"/>
      <bbk:Obs TIME_PERIOD="2025-06-24" OBS_VALUE="1.02596" BBK_DIFF_A="0.34381"/>
      <bbk:Obs TIME_PERIOD="2025-06-23" OBS_VALUE="0.68215" BBK_DIFF_A="-0.24445"/>
      <bbk:Obs TIME_PERIOD="2025-06-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-06-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-06-20" OBS_VALUE="0.9266" BBK_DIFF_A="0.01929"/>
      <bbk:Obs TIME_PERIOD="2025-06-19" OBS_VALUE="0.90731" BBK_DIFF_A="-0.09036"/>
      <bbk:Obs TIME_PERIOD="2025-06-18" OBS_VALUE="0.99767" BBK_DIFF_A="0.07975"/>
      <bbk:Obs TIME_PERIOD="2025-06-17" OBS_VALUE="0.91792" BBK_DIFF_A="-0.01677"/>
      <bbk:Obs TIME_PERIOD="2025-06-16" OBS_VALUE="0.93469" BBK_DIFF_A="0.05248"/>
      <bbk:Obs TIME_PERIOD="2025-06-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-06-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-06-13" OBS_VALUE="0.88221" BBK_DIFF_A="-0.17188"/>
      <bbk:Obs TIME_PERIOD="2025-06-12" OBS_VALUE="1.05409" BBK_DIFF_A="0.03927"/>
      <bbk:Obs TIME_PERIOD="2025-06-11" OBS_VALUE="1.01482" BBK_DIFF_A="0.04413"/>
      <bbk:Obs TIME_PERIOD="2025-06-10" OBS_VALUE="0.97069" BBK_DIFF_A="-0.07337"/>
      <bbk:Obs TIME_PERIOD="2025-06-09" OBS_VALUE="1.04406" BBK_DIFF_A="0.09726"/>
      <bbk:Obs TIME_PERIOD="2025-06-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-06-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-06-06" OBS_VALUE="0.9468" BBK_DIFF_A="-0.08719"/>
      <bbk:Obs TIME_PERIOD="2025-06-05" OBS_VALUE="1.03399" BBK_DIFF_A="-0.09577"/>
      <bbk:Obs TIME_PERIOD="2025-06-04" OBS_VALUE="1.12976" BBK_DIFF_A="-0.02243"/>
      <bbk:Obs TIME_PERIOD="2025-06-03" OBS_VALUE="1.15219" BBK_DIFF_A="0.11211"/>
      <bbk:Obs TIME_PERIOD="2025-06-02" OBS_VALUE="1.04008" BBK_DIFF_A="-0.10725"/>
      <bbk:Obs TIME_PERIOD="2025-06-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-05-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-05-30" OBS_VALUE="1.14733" BBK_DIFF_A="0.02407"/>
      <bbk:Obs TIME_PERIOD="2025-05-29" OBS_VALUE="1.12326" BBK_DIFF_A="-0.08335"/>
      <bbk:Obs TIME_PERIOD="2025-05-28" OBS_VALUE="1.20661" BBK_DIFF_A="-0.01331"/>
      <bbk:Obs TIME_PERIOD="2025-05-27" OBS_VALUE="1.21992" BBK_DIFF_A="0.00576"/>
      <bbk:Obs TIME_PERIOD="2025-05-26" OBS_VALUE="1.21416" BBK_DIFF_A="0.0388"/>
      <bbk:Obs TIME_PERIOD="2025-05-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-05-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-05-23" OBS_VALUE="1.17536" BBK_DIFF_A="-0.00962"/>
      <bbk:Obs TIME_PERIOD="2025-05-22" OBS_VALUE="1.18498" BBK_DIFF_A="0.01807"/>
      <bbk:Obs TIME_PERIOD="2025-05-21" OBS_VALUE="1.16691" BBK_DIFF_A="-0.05456"/>
      <bbk:Obs TIME_PERIOD="2025-05-20" OBS_VALUE="1.22147" BBK_DIFF_A="0.0609"/>
      <bbk:Obs TIME_PERIOD="2025-05-19" OBS_VALUE="1.16057" BBK_DIFF_A="0.08081"/>
      <bbk:Obs TIME_PERIOD="2025-05-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-05-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-05-16" OBS_VALUE="1.07976" BBK_DIFF_A="0.06179"/>
      <bbk:Obs TIME_PERIOD="2025-05-15" OBS_VALUE="1.01797" BBK_DIFF_A="-0.12404"/>
      <bbk:Obs TIME_PERIOD="2025-05-14" OBS_VALUE="1.14201" BBK_DIFF_A="-0.03491"/>
      <bbk:Obs TIME_PERIOD="2025-05-13" OBS_VALUE="1.17692" BBK_DIFF_A="-0.0477"/>
      <bbk:Obs TIME_PERIOD="2025-05-12" OBS_VALUE="1.22462" BBK_DIFF_A="-0.08085"/>
      <bbk:Obs TIME_PERIOD="2025-05-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-05-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-05-09" OBS_VALUE="1.30547" BBK_DIFF_A="-0.10443"/>
      <bbk:Obs TIME_PERIOD="2025-05-08" OBS_VALUE="1.4099" BBK_DIFF_A="0.0405"/>
      <bbk:Obs TIME_PERIOD="2025-05-07" OBS_VALUE="1.3694" BBK_DIFF_A="0.01384"/>
      <bbk:Obs TIME_PERIOD="2025-05-06" OBS_VALUE="1.35556" BBK_DIFF_A="0.01733"/>
      <bbk:Obs TIME_PERIOD="2025-05-05" OBS_VALUE="1.33823" BBK_DIFF_A="-0.09604"/>
      <bbk:Obs TIME_PERIOD="2025-05-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-05-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-05-02" OBS_VALUE="1.43427" BBK_DIFF_A="0.03305"/>
      <bbk:Obs TIME_PERIOD="2025-05-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-04-30" OBS_VALUE="1.40122" BBK_DIFF_A="-0.01765"/>
      <bbk:Obs TIME_PERIOD="2025-04-29" OBS_VALUE="1.41887" BBK_DIFF_A="0.06964"/>
      <bbk:Obs TIME_PERIOD="2025-04-28" OBS_VALUE="1.34923" BBK_DIFF_A="-0.04646"/>
      <bbk:Obs TIME_PERIOD="2025-04-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-04-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-04-25" OBS_VALUE="1.39569" BBK_DIFF_A="-0.05837"/>
      <bbk:Obs TIME_PERIOD="2025-04-24" OBS_VALUE="1.45406" BBK_DIFF_A="0.01931"/>
      <bbk:Obs TIME_PERIOD="2025-04-23" OBS_VALUE="1.43475" BBK_DIFF_A="-0.05673"/>
      <bbk:Obs TIME_PERIOD="2025-04-22" OBS_VALUE="1.49148" BBK_DIFF_A="0.33296"/>
      <bbk:Obs TIME_PERIOD="2025-04-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-04-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-04-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-04-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-04-17" OBS_VALUE="1.15852" BBK_DIFF_A="-0.05887"/>
      <bbk:Obs TIME_PERIOD="2025-04-16" OBS_VALUE="1.21739" BBK_DIFF_A="-0.16596"/>
      <bbk:Obs TIME_PERIOD="2025-04-15" OBS_VALUE="1.38335" BBK_DIFF_A="0.66306"/>
      <bbk:Obs TIME_PERIOD="2025-04-14" OBS_VALUE="0.72029" BBK_DIFF_A="-0.34947"/>
      <bbk:Obs TIME_PERIOD="2025-04-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-04-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-04-11" OBS_VALUE="1.06976" BBK_DIFF_A="0.20168"/>
      <bbk:Obs TIME_PERIOD="2025-04-10" OBS_VALUE="0.86808" BBK_DIFF_A="1.41711"/>
      <bbk:Obs TIME_PERIOD="2025-04-09" OBS_VALUE="-0.54903" BBK_DIFF_A="-0.08229"/>
      <bbk:Obs TIME_PERIOD="2025-04-08" OBS_VALUE="-0.46674" BBK_DIFF_A="-1.05292"/>
      <bbk:Obs TIME_PERIOD="2025-04-07" OBS_VALUE="0.58618" BBK_DIFF_A="-0.57101"/>
      <bbk:Obs TIME_PERIOD="2025-04-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-04-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-04-04" OBS_VALUE="1.15719" BBK_DIFF_A="1.15784"/>
      <bbk:Obs TIME_PERIOD="2025-04-03" OBS_VALUE="-6.5E-4" BBK_DIFF_A="0.2079"/>
      <bbk:Obs TIME_PERIOD="2025-04-02" OBS_VALUE="-0.20855" BBK_DIFF_A="-0.04702"/>
      <bbk:Obs TIME_PERIOD="2025-04-01" OBS_VALUE="-0.16153" BBK_DIFF_A="-0.02034"/>
      <bbk:Obs TIME_PERIOD="2025-03-31" OBS_VALUE="-0.14119" BBK_DIFF_A="0.34422"/>
      <bbk:Obs TIME_PERIOD="2025-03-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-03-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-03-28" OBS_VALUE="-0.48541" BBK_DIFF_A="0.2327"/>
      <bbk:Obs TIME_PERIOD="2025-03-27" OBS_VALUE="-0.71811" BBK_DIFF_A="-0.03792"/>
      <bbk:Obs TIME_PERIOD="2025-03-26" OBS_VALUE="-0.68019" BBK_DIFF_A="-0.05423"/>
      <bbk:Obs TIME_PERIOD="2025-03-25" OBS_VALUE="-0.62596" BBK_DIFF_A="-0.04641"/>
      <bbk:Obs TIME_PERIOD="2025-03-24" OBS_VALUE="-0.57955" BBK_DIFF_A="-1.78934"/>
      <bbk:Obs TIME_PERIOD="2025-03-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-03-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-03-21" OBS_VALUE="1.20979" BBK_DIFF_A="0.10047"/>
      <bbk:Obs TIME_PERIOD="2025-03-20" OBS_VALUE="1.10932" BBK_DIFF_A="-0.03277"/>
      <bbk:Obs TIME_PERIOD="2025-03-19" OBS_VALUE="1.14209" BBK_DIFF_A="0.06524"/>
      <bbk:Obs TIME_PERIOD="2025-03-18" OBS_VALUE="1.07685" BBK_DIFF_A="-0.01867"/>
      <bbk:Obs TIME_PERIOD="2025-03-17" OBS_VALUE="1.09552" BBK_DIFF_A="-0.01015"/>
      <bbk:Obs TIME_PERIOD="2025-03-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-03-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-03-14" OBS_VALUE="1.10567" BBK_DIFF_A="0.05264"/>
      <bbk:Obs TIME_PERIOD="2025-03-13" OBS_VALUE="1.05303" BBK_DIFF_A="-0.03678"/>
      <bbk:Obs TIME_PERIOD="2025-03-12" OBS_VALUE="1.08981" BBK_DIFF_A="0.00767"/>
      <bbk:Obs TIME_PERIOD="2025-03-11" OBS_VALUE="1.08214" BBK_DIFF_A="-0.13557"/>
      <bbk:Obs TIME_PERIOD="2025-03-10" OBS_VALUE="1.21771" BBK_DIFF_A="0.14367"/>
      <bbk:Obs TIME_PERIOD="2025-03-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-03-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-03-07" OBS_VALUE="1.07404" BBK_DIFF_A="0.02443"/>
      <bbk:Obs TIME_PERIOD="2025-03-06" OBS_VALUE="1.04961" BBK_DIFF_A="-0.62192"/>
      <bbk:Obs TIME_PERIOD="2025-03-05" OBS_VALUE="1.67153" BBK_DIFF_A="-0.07493"/>
      <bbk:Obs TIME_PERIOD="2025-03-04" OBS_VALUE="1.74646" BBK_DIFF_A="0.07903"/>
      <bbk:Obs TIME_PERIOD="2025-03-03" OBS_VALUE="1.66743" BBK_DIFF_A="0.17699"/>
      <bbk:Obs TIME_PERIOD="2025-03-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-03-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-02-28" OBS_VALUE="1.49044" BBK_DIFF_A="0.13483"/>
      <bbk:Obs TIME_PERIOD="2025-02-27" OBS_VALUE="1.35561" BBK_DIFF_A="0.01044"/>
      <bbk:Obs TIME_PERIOD="2025-02-26" OBS_VALUE="1.34517" BBK_DIFF_A="0.07144"/>
      <bbk:Obs TIME_PERIOD="2025-02-25" OBS_VALUE="1.27373" BBK_DIFF_A="0.03383"/>
      <bbk:Obs TIME_PERIOD="2025-02-24" OBS_VALUE="1.2399" BBK_DIFF_A="-0.03017"/>
      <bbk:Obs TIME_PERIOD="2025-02-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-02-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-02-21" OBS_VALUE="1.27007" BBK_DIFF_A="-0.00335"/>
      <bbk:Obs TIME_PERIOD="2025-02-20" OBS_VALUE="1.27342" BBK_DIFF_A="-0.01311"/>
      <bbk:Obs TIME_PERIOD="2025-02-19" OBS_VALUE="1.28653" BBK_DIFF_A="-0.01897"/>
      <bbk:Obs TIME_PERIOD="2025-02-18" OBS_VALUE="1.3055" BBK_DIFF_A="-0.02178"/>
      <bbk:Obs TIME_PERIOD="2025-02-17" OBS_VALUE="1.32728" BBK_DIFF_A="-0.01508"/>
      <bbk:Obs TIME_PERIOD="2025-02-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-02-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-02-14" OBS_VALUE="1.34236" BBK_DIFF_A="0.01706"/>
      <bbk:Obs TIME_PERIOD="2025-02-13" OBS_VALUE="1.3253" BBK_DIFF_A="-0.0733"/>
      <bbk:Obs TIME_PERIOD="2025-02-12" OBS_VALUE="1.3986" BBK_DIFF_A="-0.04339"/>
      <bbk:Obs TIME_PERIOD="2025-02-11" OBS_VALUE="1.44199" BBK_DIFF_A="-0.06879"/>
      <bbk:Obs TIME_PERIOD="2025-02-10" OBS_VALUE="1.51078" BBK_DIFF_A="0.00171"/>
      <bbk:Obs TIME_PERIOD="2025-02-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-02-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-02-07" OBS_VALUE="1.50907" BBK_DIFF_A="-9.4E-4"/>
      <bbk:Obs TIME_PERIOD="2025-02-06" OBS_VALUE="1.51001" BBK_DIFF_A="-0.01692"/>
      <bbk:Obs TIME_PERIOD="2025-02-05" OBS_VALUE="1.52693" BBK_DIFF_A="0.06899"/>
      <bbk:Obs TIME_PERIOD="2025-02-04" OBS_VALUE="1.45794" BBK_DIFF_A="-0.02581"/>
      <bbk:Obs TIME_PERIOD="2025-02-03" OBS_VALUE="1.48375" BBK_DIFF_A="0.00381"/>
      <bbk:Obs TIME_PERIOD="2025-02-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-02-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-01-31" OBS_VALUE="1.47994" BBK_DIFF_A="-0.00138"/>
      <bbk:Obs TIME_PERIOD="2025-01-30" OBS_VALUE="1.48132" BBK_DIFF_A="-0.04536"/>
      <bbk:Obs TIME_PERIOD="2025-01-29" OBS_VALUE="1.52668" BBK_DIFF_A="0.02587"/>
      <bbk:Obs TIME_PERIOD="2025-01-28" OBS_VALUE="1.50081" BBK_DIFF_A="-0.01387"/>
      <bbk:Obs TIME_PERIOD="2025-01-27" OBS_VALUE="1.51468" BBK_DIFF_A="0.07384"/>
      <bbk:Obs TIME_PERIOD="2025-01-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-01-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-01-24" OBS_VALUE="1.44084" BBK_DIFF_A="0.00972"/>
      <bbk:Obs TIME_PERIOD="2025-01-23" OBS_VALUE="1.43112" BBK_DIFF_A="-0.07034"/>
      <bbk:Obs TIME_PERIOD="2025-01-22" OBS_VALUE="1.50146" BBK_DIFF_A="0.04927"/>
      <bbk:Obs TIME_PERIOD="2025-01-21" OBS_VALUE="1.45219" BBK_DIFF_A="0.02647"/>
      <bbk:Obs TIME_PERIOD="2025-01-20" OBS_VALUE="1.42572" BBK_DIFF_A="-0.0174"/>
      <bbk:Obs TIME_PERIOD="2025-01-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-01-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-01-17" OBS_VALUE="1.44312" BBK_DIFF_A="0.02797"/>
      <bbk:Obs TIME_PERIOD="2025-01-16" OBS_VALUE="1.41515" BBK_DIFF_A="0.05876"/>
      <bbk:Obs TIME_PERIOD="2025-01-15" OBS_VALUE="1.35639" BBK_DIFF_A="-0.05095"/>
      <bbk:Obs TIME_PERIOD="2025-01-14" OBS_VALUE="1.40734" BBK_DIFF_A="-0.05616"/>
      <bbk:Obs TIME_PERIOD="2025-01-13" OBS_VALUE="1.4635" BBK_DIFF_A="-0.09885"/>
      <bbk:Obs TIME_PERIOD="2025-01-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-01-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-01-10" OBS_VALUE="1.56235" BBK_DIFF_A="-0.04742"/>
      <bbk:Obs TIME_PERIOD="2025-01-09" OBS_VALUE="1.60977" BBK_DIFF_A="-0.0302"/>
      <bbk:Obs TIME_PERIOD="2025-01-08" OBS_VALUE="1.63997" BBK_DIFF_A="-0.03484"/>
      <bbk:Obs TIME_PERIOD="2025-01-07" OBS_VALUE="1.67481" BBK_DIFF_A="0.08553"/>
      <bbk:Obs TIME_PERIOD="2025-01-06" OBS_VALUE="1.58928" BBK_DIFF_A="-0.03184"/>
      <bbk:Obs TIME_PERIOD="2025-01-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-01-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-01-03" OBS_VALUE="1.62112" BBK_DIFF_A="-0.04918"/>
      <bbk:Obs TIME_PERIOD="2025-01-02" OBS_VALUE="1.6703" BBK_DIFF_A="0.11276"/>
      <bbk:Obs TIME_PERIOD="2025-01-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-12-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-12-30" OBS_VALUE="1.55754" BBK_DIFF_A="-0.03164"/>
      <bbk:Obs TIME_PERIOD="2024-12-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-12-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-12-27" OBS_VALUE="1.58918" BBK_DIFF_A="-0.24358"/>
      <bbk:Obs TIME_PERIOD="2024-12-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-12-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-12-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-12-23" OBS_VALUE="1.83276" BBK_DIFF_A="-0.07234"/>
      <bbk:Obs TIME_PERIOD="2024-12-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-12-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-12-20" OBS_VALUE="1.9051" BBK_DIFF_A="0.10235"/>
      <bbk:Obs TIME_PERIOD="2024-12-19" OBS_VALUE="1.80275" BBK_DIFF_A="-0.049"/>
      <bbk:Obs TIME_PERIOD="2024-12-18" OBS_VALUE="1.85175" BBK_DIFF_A="-0.01198"/>
      <bbk:Obs TIME_PERIOD="2024-12-17" OBS_VALUE="1.86373" BBK_DIFF_A="-0.00985"/>
      <bbk:Obs TIME_PERIOD="2024-12-16" OBS_VALUE="1.87358" BBK_DIFF_A="0.01701"/>
      <bbk:Obs TIME_PERIOD="2024-12-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-12-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-12-13" OBS_VALUE="1.85657" BBK_DIFF_A="-0.12243"/>
      <bbk:Obs TIME_PERIOD="2024-12-12" OBS_VALUE="1.979" BBK_DIFF_A="-0.06732"/>
      <bbk:Obs TIME_PERIOD="2024-12-11" OBS_VALUE="2.04632" BBK_DIFF_A="0.02142"/>
      <bbk:Obs TIME_PERIOD="2024-12-10" OBS_VALUE="2.0249" BBK_DIFF_A="7.3E-4"/>
      <bbk:Obs TIME_PERIOD="2024-12-09" OBS_VALUE="2.02417" BBK_DIFF_A="0.05947"/>
      <bbk:Obs TIME_PERIOD="2024-12-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-12-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-12-06" OBS_VALUE="1.9647" BBK_DIFF_A="-0.12973"/>
      <bbk:Obs TIME_PERIOD="2024-12-05" OBS_VALUE="2.09443" BBK_DIFF_A="-0.02962"/>
      <bbk:Obs TIME_PERIOD="2024-12-04" OBS_VALUE="2.12405" BBK_DIFF_A="-0.03175"/>
      <bbk:Obs TIME_PERIOD="2024-12-03" OBS_VALUE="2.1558" BBK_DIFF_A="-0.06726"/>
      <bbk:Obs TIME_PERIOD="2024-12-02" OBS_VALUE="2.22306" BBK_DIFF_A="0.1011"/>
      <bbk:Obs TIME_PERIOD="2024-12-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-11-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-11-29" OBS_VALUE="2.12196" BBK_DIFF_A="0.01354"/>
      <bbk:Obs TIME_PERIOD="2024-11-28" OBS_VALUE="2.10842" BBK_DIFF_A="-0.06298"/>
      <bbk:Obs TIME_PERIOD="2024-11-27" OBS_VALUE="2.1714" BBK_DIFF_A="0.14118"/>
      <bbk:Obs TIME_PERIOD="2024-11-26" OBS_VALUE="2.03022" BBK_DIFF_A="-0.02861"/>
      <bbk:Obs TIME_PERIOD="2024-11-25" OBS_VALUE="2.05883" BBK_DIFF_A="-0.03834"/>
      <bbk:Obs TIME_PERIOD="2024-11-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-11-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-11-22" OBS_VALUE="2.09717" BBK_DIFF_A="-0.03054"/>
      <bbk:Obs TIME_PERIOD="2024-11-21" OBS_VALUE="2.12771" BBK_DIFF_A="0.04422"/>
      <bbk:Obs TIME_PERIOD="2024-11-20" OBS_VALUE="2.08349" BBK_DIFF_A="-0.06313"/>
      <bbk:Obs TIME_PERIOD="2024-11-19" OBS_VALUE="2.14662" BBK_DIFF_A="0.19893"/>
      <bbk:Obs TIME_PERIOD="2024-11-18" OBS_VALUE="1.94769" BBK_DIFF_A="-0.17702"/>
      <bbk:Obs TIME_PERIOD="2024-11-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-11-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-11-15" OBS_VALUE="2.12471" BBK_DIFF_A="0.05865"/>
      <bbk:Obs TIME_PERIOD="2024-11-14" OBS_VALUE="2.06606" BBK_DIFF_A="0.06129"/>
      <bbk:Obs TIME_PERIOD="2024-11-13" OBS_VALUE="2.00477" BBK_DIFF_A="-0.10058"/>
      <bbk:Obs TIME_PERIOD="2024-11-12" OBS_VALUE="2.10535" BBK_DIFF_A="0.02421"/>
      <bbk:Obs TIME_PERIOD="2024-11-11" OBS_VALUE="2.08114" BBK_DIFF_A="0.05378"/>
      <bbk:Obs TIME_PERIOD="2024-11-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-11-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-11-08" OBS_VALUE="2.02736" BBK_DIFF_A="0.00252"/>
      <bbk:Obs TIME_PERIOD="2024-11-07" OBS_VALUE="2.02484" BBK_DIFF_A="-0.06961"/>
      <bbk:Obs TIME_PERIOD="2024-11-06" OBS_VALUE="2.09445" BBK_DIFF_A="0.11267"/>
      <bbk:Obs TIME_PERIOD="2024-11-05" OBS_VALUE="1.98178" BBK_DIFF_A="0.05673"/>
      <bbk:Obs TIME_PERIOD="2024-11-04" OBS_VALUE="1.92505" BBK_DIFF_A="0.00969"/>
      <bbk:Obs TIME_PERIOD="2024-11-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-11-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-11-01" OBS_VALUE="1.91536" BBK_DIFF_A="-0.06721"/>
      <bbk:Obs TIME_PERIOD="2024-10-31" OBS_VALUE="1.98257" BBK_DIFF_A="-0.1943"/>
      <bbk:Obs TIME_PERIOD="2024-10-30" OBS_VALUE="2.17687" BBK_DIFF_A="-0.05708"/>
      <bbk:Obs TIME_PERIOD="2024-10-29" OBS_VALUE="2.23395" BBK_DIFF_A="-0.05534"/>
      <bbk:Obs TIME_PERIOD="2024-10-28" OBS_VALUE="2.28929" BBK_DIFF_A="-0.07521"/>
      <bbk:Obs TIME_PERIOD="2024-10-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-10-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-10-25" OBS_VALUE="2.3645" BBK_DIFF_A="-0.01594"/>
      <bbk:Obs TIME_PERIOD="2024-10-24" OBS_VALUE="2.38044" BBK_DIFF_A="0.00133"/>
      <bbk:Obs TIME_PERIOD="2024-10-23" OBS_VALUE="2.37911" BBK_DIFF_A="-0.07429"/>
      <bbk:Obs TIME_PERIOD="2024-10-22" OBS_VALUE="2.4534" BBK_DIFF_A="-0.07116"/>
      <bbk:Obs TIME_PERIOD="2024-10-21" OBS_VALUE="2.52456" BBK_DIFF_A="-0.06892"/>
      <bbk:Obs TIME_PERIOD="2024-10-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-10-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-10-18" OBS_VALUE="2.59348" BBK_DIFF_A="-0.03928"/>
      <bbk:Obs TIME_PERIOD="2024-10-17" OBS_VALUE="2.63276" BBK_DIFF_A="0.04334"/>
      <bbk:Obs TIME_PERIOD="2024-10-16" OBS_VALUE="2.58942" BBK_DIFF_A="0.08464"/>
      <bbk:Obs TIME_PERIOD="2024-10-15" OBS_VALUE="2.50478" BBK_DIFF_A="0.01938"/>
      <bbk:Obs TIME_PERIOD="2024-10-14" OBS_VALUE="2.4854" BBK_DIFF_A="-0.05834"/>
      <bbk:Obs TIME_PERIOD="2024-10-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-10-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-10-11" OBS_VALUE="2.54374" BBK_DIFF_A="0.01778"/>
      <bbk:Obs TIME_PERIOD="2024-10-10" OBS_VALUE="2.52596" BBK_DIFF_A="-0.05089"/>
      <bbk:Obs TIME_PERIOD="2024-10-09" OBS_VALUE="2.57685" BBK_DIFF_A="0.01057"/>
      <bbk:Obs TIME_PERIOD="2024-10-08" OBS_VALUE="2.56628" BBK_DIFF_A="0.03746"/>
      <bbk:Obs TIME_PERIOD="2024-10-07" OBS_VALUE="2.52882" BBK_DIFF_A="-0.15076"/>
      <bbk:Obs TIME_PERIOD="2024-10-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-10-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-10-04" OBS_VALUE="2.67958" BBK_DIFF_A="-0.11193"/>
      <bbk:Obs TIME_PERIOD="2024-10-03" OBS_VALUE="2.79151" BBK_DIFF_A="-0.08483"/>
      <bbk:Obs TIME_PERIOD="2024-10-02" OBS_VALUE="2.87634" BBK_DIFF_A="-0.0783"/>
      <bbk:Obs TIME_PERIOD="2024-10-01" OBS_VALUE="2.95464" BBK_DIFF_A="0.12381"/>
      <bbk:Obs TIME_PERIOD="2024-09-30" OBS_VALUE="2.83083" BBK_DIFF_A="-0.04551"/>
      <bbk:Obs TIME_PERIOD="2024-09-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-09-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-09-27" OBS_VALUE="2.87634" BBK_DIFF_A="-0.09554"/>
      <bbk:Obs TIME_PERIOD="2024-09-26" OBS_VALUE="2.97188" BBK_DIFF_A="0.014"/>
      <bbk:Obs TIME_PERIOD="2024-09-25" OBS_VALUE="2.95788" BBK_DIFF_A="0.0825"/>
      <bbk:Obs TIME_PERIOD="2024-09-24" OBS_VALUE="2.87538" BBK_DIFF_A="0.00795"/>
      <bbk:Obs TIME_PERIOD="2024-09-23" OBS_VALUE="2.86743" BBK_DIFF_A="-0.01729"/>
      <bbk:Obs TIME_PERIOD="2024-09-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-09-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-09-20" OBS_VALUE="2.88472" BBK_DIFF_A="0.04881"/>
      <bbk:Obs TIME_PERIOD="2024-09-19" OBS_VALUE="2.83591" BBK_DIFF_A="-0.04092"/>
      <bbk:Obs TIME_PERIOD="2024-09-18" OBS_VALUE="2.87683" BBK_DIFF_A="-0.12547"/>
      <bbk:Obs TIME_PERIOD="2024-09-17" OBS_VALUE="3.0023" BBK_DIFF_A="-0.02344"/>
      <bbk:Obs TIME_PERIOD="2024-09-16" OBS_VALUE="3.02574" BBK_DIFF_A="-0.05015"/>
      <bbk:Obs TIME_PERIOD="2024-09-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-09-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-09-13" OBS_VALUE="3.07589" BBK_DIFF_A="-0.01575"/>
      <bbk:Obs TIME_PERIOD="2024-09-12" OBS_VALUE="3.09164" BBK_DIFF_A="-0.02341"/>
      <bbk:Obs TIME_PERIOD="2024-09-11" OBS_VALUE="3.11505" BBK_DIFF_A="0.1262"/>
      <bbk:Obs TIME_PERIOD="2024-09-10" OBS_VALUE="2.98885" BBK_DIFF_A="0.05755"/>
      <bbk:Obs TIME_PERIOD="2024-09-09" OBS_VALUE="2.9313" BBK_DIFF_A="-0.05419"/>
      <bbk:Obs TIME_PERIOD="2024-09-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-09-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-09-06" OBS_VALUE="2.98549" BBK_DIFF_A="-6.3E-4"/>
      <bbk:Obs TIME_PERIOD="2024-09-05" OBS_VALUE="2.98612" BBK_DIFF_A="-0.00213"/>
      <bbk:Obs TIME_PERIOD="2024-09-04" OBS_VALUE="2.98825" BBK_DIFF_A="0.0589"/>
      <bbk:Obs TIME_PERIOD="2024-09-03" OBS_VALUE="2.92935" BBK_DIFF_A="0.03455"/>
      <bbk:Obs TIME_PERIOD="2024-09-02" OBS_VALUE="2.8948" BBK_DIFF_A="-0.01671"/>
      <bbk:Obs TIME_PERIOD="2024-09-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-08-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-08-30" OBS_VALUE="2.91151" BBK_DIFF_A="-0.01216"/>
      <bbk:Obs TIME_PERIOD="2024-08-29" OBS_VALUE="2.92367" BBK_DIFF_A="0.06563"/>
      <bbk:Obs TIME_PERIOD="2024-08-28" OBS_VALUE="2.85804" BBK_DIFF_A="-0.03575"/>
      <bbk:Obs TIME_PERIOD="2024-08-27" OBS_VALUE="2.89379" BBK_DIFF_A="0.02749"/>
      <bbk:Obs TIME_PERIOD="2024-08-26" OBS_VALUE="2.8663" BBK_DIFF_A="-0.10543"/>
      <bbk:Obs TIME_PERIOD="2024-08-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-08-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-08-23" OBS_VALUE="2.97173" BBK_DIFF_A="0.04251"/>
      <bbk:Obs TIME_PERIOD="2024-08-22" OBS_VALUE="2.92922" BBK_DIFF_A="-0.15937"/>
      <bbk:Obs TIME_PERIOD="2024-08-21" OBS_VALUE="3.08859" BBK_DIFF_A="-0.03084"/>
      <bbk:Obs TIME_PERIOD="2024-08-20" OBS_VALUE="3.11943" BBK_DIFF_A="0.00473"/>
      <bbk:Obs TIME_PERIOD="2024-08-19" OBS_VALUE="3.1147" BBK_DIFF_A="-0.09243"/>
      <bbk:Obs TIME_PERIOD="2024-08-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-08-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-08-16" OBS_VALUE="3.20713" BBK_DIFF_A="-0.01545"/>
      <bbk:Obs TIME_PERIOD="2024-08-15" OBS_VALUE="3.22258" BBK_DIFF_A="-0.01507"/>
      <bbk:Obs TIME_PERIOD="2024-08-14" OBS_VALUE="3.23765" BBK_DIFF_A="-0.03269"/>
      <bbk:Obs TIME_PERIOD="2024-08-13" OBS_VALUE="3.27034" BBK_DIFF_A="1.64316"/>
      <bbk:Obs TIME_PERIOD="2024-08-12" OBS_VALUE="1.62718" BBK_DIFF_A="-1.59106"/>
      <bbk:Obs TIME_PERIOD="2024-08-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-08-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-08-09" OBS_VALUE="3.21824" BBK_DIFF_A="0.01208"/>
      <bbk:Obs TIME_PERIOD="2024-08-08" OBS_VALUE="3.20616" BBK_DIFF_A="0.04384"/>
      <bbk:Obs TIME_PERIOD="2024-08-07" OBS_VALUE="3.16232" BBK_DIFF_A="-0.29667"/>
      <bbk:Obs TIME_PERIOD="2024-08-06" OBS_VALUE="3.45899" BBK_DIFF_A="0.22726"/>
      <bbk:Obs TIME_PERIOD="2024-08-05" OBS_VALUE="3.23173" BBK_DIFF_A="-0.31189"/>
      <bbk:Obs TIME_PERIOD="2024-08-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-08-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-08-02" OBS_VALUE="3.54362" BBK_DIFF_A="8.0E-5"/>
      <bbk:Obs TIME_PERIOD="2024-08-01" OBS_VALUE="3.54354" BBK_DIFF_A="0.42691"/>
      <bbk:Obs TIME_PERIOD="2024-07-31" OBS_VALUE="3.11663" BBK_DIFF_A="0.05737"/>
      <bbk:Obs TIME_PERIOD="2024-07-30" OBS_VALUE="3.05926" BBK_DIFF_A="-0.0437"/>
      <bbk:Obs TIME_PERIOD="2024-07-29" OBS_VALUE="3.10296" BBK_DIFF_A="0.12488"/>
      <bbk:Obs TIME_PERIOD="2024-07-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-07-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-07-26" OBS_VALUE="2.97808" BBK_DIFF_A="-0.04639"/>
      <bbk:Obs TIME_PERIOD="2024-07-25" OBS_VALUE="3.02447" BBK_DIFF_A="-4.0E-5"/>
      <bbk:Obs TIME_PERIOD="2024-07-24" OBS_VALUE="3.02451" BBK_DIFF_A="0.91196"/>
      <bbk:Obs TIME_PERIOD="2024-07-23" OBS_VALUE="2.11255" BBK_DIFF_A="-0.37505"/>
      <bbk:Obs TIME_PERIOD="2024-07-22" OBS_VALUE="2.4876" BBK_DIFF_A="-0.21216"/>
      <bbk:Obs TIME_PERIOD="2024-07-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-07-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-07-19" OBS_VALUE="2.69976" BBK_DIFF_A="-0.07587"/>
      <bbk:Obs TIME_PERIOD="2024-07-18" OBS_VALUE="2.77563" BBK_DIFF_A="0.14149"/>
      <bbk:Obs TIME_PERIOD="2024-07-17" OBS_VALUE="2.63414" BBK_DIFF_A="1.03195"/>
      <bbk:Obs TIME_PERIOD="2024-07-16" OBS_VALUE="1.60219" BBK_DIFF_A="-0.06438"/>
      <bbk:Obs TIME_PERIOD="2024-07-15" OBS_VALUE="1.66657" BBK_DIFF_A="0.21466"/>
      <bbk:Obs TIME_PERIOD="2024-07-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-07-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-07-12" OBS_VALUE="1.45191" BBK_DIFF_A="-0.26409"/>
      <bbk:Obs TIME_PERIOD="2024-07-11" OBS_VALUE="1.716" BBK_DIFF_A="-0.28879"/>
      <bbk:Obs TIME_PERIOD="2024-07-10" OBS_VALUE="2.00479" BBK_DIFF_A="-0.09102"/>
      <bbk:Obs TIME_PERIOD="2024-07-09" OBS_VALUE="2.09581" BBK_DIFF_A="0.07296"/>
      <bbk:Obs TIME_PERIOD="2024-07-08" OBS_VALUE="2.02285" BBK_DIFF_A="-0.00639"/>
      <bbk:Obs TIME_PERIOD="2024-07-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-07-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-07-05" OBS_VALUE="2.02924" BBK_DIFF_A="0.16109"/>
      <bbk:Obs TIME_PERIOD="2024-07-04" OBS_VALUE="1.86815" BBK_DIFF_A="-0.09029"/>
      <bbk:Obs TIME_PERIOD="2024-07-03" OBS_VALUE="1.95844" BBK_DIFF_A="0.12972"/>
      <bbk:Obs TIME_PERIOD="2024-07-02" OBS_VALUE="1.82872" BBK_DIFF_A="-0.16774"/>
      <bbk:Obs TIME_PERIOD="2024-07-01" OBS_VALUE="1.99646" BBK_DIFF_A="0.21076"/>
      <bbk:Obs TIME_PERIOD="2024-06-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-06-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-06-28" OBS_VALUE="1.7857" BBK_DIFF_A="-0.07693"/>
      <bbk:Obs TIME_PERIOD="2024-06-27" OBS_VALUE="1.86263" BBK_DIFF_A="-0.10641"/>
      <bbk:Obs TIME_PERIOD="2024-06-26" OBS_VALUE="1.96904" BBK_DIFF_A="-0.02516"/>
      <bbk:Obs TIME_PERIOD="2024-06-25" OBS_VALUE="1.9942" BBK_DIFF_A="0.01778"/>
      <bbk:Obs TIME_PERIOD="2024-06-24" OBS_VALUE="1.97642" BBK_DIFF_A="0.03048"/>
      <bbk:Obs TIME_PERIOD="2024-06-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-06-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-06-21" OBS_VALUE="1.94594" BBK_DIFF_A="-0.04859"/>
      <bbk:Obs TIME_PERIOD="2024-06-20" OBS_VALUE="1.99453" BBK_DIFF_A="-0.0544"/>
      <bbk:Obs TIME_PERIOD="2024-06-19" OBS_VALUE="2.04893" BBK_DIFF_A="0.02523"/>
      <bbk:Obs TIME_PERIOD="2024-06-18" OBS_VALUE="2.0237" BBK_DIFF_A="0.28103"/>
      <bbk:Obs TIME_PERIOD="2024-06-17" OBS_VALUE="1.74267" BBK_DIFF_A="-0.14304"/>
      <bbk:Obs TIME_PERIOD="2024-06-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-06-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-06-14" OBS_VALUE="1.88571" BBK_DIFF_A="-0.31913"/>
      <bbk:Obs TIME_PERIOD="2024-06-13" OBS_VALUE="2.20484" BBK_DIFF_A="0.00203"/>
      <bbk:Obs TIME_PERIOD="2024-06-12" OBS_VALUE="2.20281" BBK_DIFF_A="4.6E-4"/>
      <bbk:Obs TIME_PERIOD="2024-06-11" OBS_VALUE="2.20235" BBK_DIFF_A="-0.30949"/>
      <bbk:Obs TIME_PERIOD="2024-06-10" OBS_VALUE="2.51184" BBK_DIFF_A="0.03117"/>
      <bbk:Obs TIME_PERIOD="2024-06-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-06-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-06-07" OBS_VALUE="2.48067" BBK_DIFF_A="0.27625"/>
      <bbk:Obs TIME_PERIOD="2024-06-06" OBS_VALUE="2.20442" BBK_DIFF_A="-0.02973"/>
      <bbk:Obs TIME_PERIOD="2024-06-05" OBS_VALUE="2.23415" BBK_DIFF_A="0.00499"/>
      <bbk:Obs TIME_PERIOD="2024-06-04" OBS_VALUE="2.22916" BBK_DIFF_A="-0.08524"/>
      <bbk:Obs TIME_PERIOD="2024-06-03" OBS_VALUE="2.3144" BBK_DIFF_A="-0.07664"/>
      <bbk:Obs TIME_PERIOD="2024-06-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-06-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-05-31" OBS_VALUE="2.39104" BBK_DIFF_A="0.09338"/>
      <bbk:Obs TIME_PERIOD="2024-05-30" OBS_VALUE="2.29766" BBK_DIFF_A="0.07594"/>
      <bbk:Obs TIME_PERIOD="2024-05-29" OBS_VALUE="2.22172" BBK_DIFF_A="-0.22029"/>
      <bbk:Obs TIME_PERIOD="2024-05-28" OBS_VALUE="2.44201" BBK_DIFF_A="-0.11724"/>
      <bbk:Obs TIME_PERIOD="2024-05-27" OBS_VALUE="2.55925" BBK_DIFF_A="0.07129"/>
      <bbk:Obs TIME_PERIOD="2024-05-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-05-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-05-24" OBS_VALUE="2.48796" BBK_DIFF_A="0.15934"/>
      <bbk:Obs TIME_PERIOD="2024-05-23" OBS_VALUE="2.32862" BBK_DIFF_A="0.14537"/>
      <bbk:Obs TIME_PERIOD="2024-05-22" OBS_VALUE="2.18325" BBK_DIFF_A="-0.03675"/>
      <bbk:Obs TIME_PERIOD="2024-05-21" OBS_VALUE="2.22" BBK_DIFF_A="0.04137"/>
      <bbk:Obs TIME_PERIOD="2024-05-20" OBS_VALUE="2.17863" BBK_DIFF_A="-0.02032"/>
      <bbk:Obs TIME_PERIOD="2024-05-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-05-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-05-17" OBS_VALUE="2.19895" BBK_DIFF_A="-0.5793"/>
      <bbk:Obs TIME_PERIOD="2024-05-16" OBS_VALUE="2.77825" BBK_DIFF_A="0.16354"/>
      <bbk:Obs TIME_PERIOD="2024-05-15" OBS_VALUE="2.61471" BBK_DIFF_A="-0.30597"/>
      <bbk:Obs TIME_PERIOD="2024-05-14" OBS_VALUE="2.92068" BBK_DIFF_A="0.47047"/>
      <bbk:Obs TIME_PERIOD="2024-05-13" OBS_VALUE="2.45021" BBK_DIFF_A="-0.01953"/>
      <bbk:Obs TIME_PERIOD="2024-05-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-05-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-05-10" OBS_VALUE="2.46974" BBK_DIFF_A="-0.01204"/>
      <bbk:Obs TIME_PERIOD="2024-05-09" OBS_VALUE="2.48178" BBK_DIFF_A="0.28823"/>
      <bbk:Obs TIME_PERIOD="2024-05-08" OBS_VALUE="2.19355" BBK_DIFF_A="0.16322"/>
      <bbk:Obs TIME_PERIOD="2024-05-07" OBS_VALUE="2.03033" BBK_DIFF_A="0.11526"/>
      <bbk:Obs TIME_PERIOD="2024-05-06" OBS_VALUE="1.91507" BBK_DIFF_A="-0.05941"/>
      <bbk:Obs TIME_PERIOD="2024-05-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-05-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-05-03" OBS_VALUE="1.97448" BBK_DIFF_A="-0.06293"/>
      <bbk:Obs TIME_PERIOD="2024-05-02" OBS_VALUE="2.03741" BBK_DIFF_A="0.01276"/>
      <bbk:Obs TIME_PERIOD="2024-05-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-04-30" OBS_VALUE="2.02465" BBK_DIFF_A="0.15911"/>
      <bbk:Obs TIME_PERIOD="2024-04-29" OBS_VALUE="1.86554" BBK_DIFF_A="-0.07255"/>
      <bbk:Obs TIME_PERIOD="2024-04-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-04-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-04-26" OBS_VALUE="1.93809" BBK_DIFF_A="0.04246"/>
      <bbk:Obs TIME_PERIOD="2024-04-25" OBS_VALUE="1.89563" BBK_DIFF_A="-0.13053"/>
      <bbk:Obs TIME_PERIOD="2024-04-24" OBS_VALUE="2.02616" BBK_DIFF_A="-0.19069"/>
      <bbk:Obs TIME_PERIOD="2024-04-23" OBS_VALUE="2.21685" BBK_DIFF_A="0.11993"/>
      <bbk:Obs TIME_PERIOD="2024-04-22" OBS_VALUE="2.09692" BBK_DIFF_A="-0.18343"/>
      <bbk:Obs TIME_PERIOD="2024-04-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-04-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-04-19" OBS_VALUE="2.28035" BBK_DIFF_A="-0.03283"/>
      <bbk:Obs TIME_PERIOD="2024-04-18" OBS_VALUE="2.31318" BBK_DIFF_A="-0.2265"/>
      <bbk:Obs TIME_PERIOD="2024-04-17" OBS_VALUE="2.53968" BBK_DIFF_A="-0.7438"/>
      <bbk:Obs TIME_PERIOD="2024-04-16" OBS_VALUE="3.28348" BBK_DIFF_A="-0.1758"/>
      <bbk:Obs TIME_PERIOD="2024-04-15" OBS_VALUE="3.45928" BBK_DIFF_A="0.89256"/>
      <bbk:Obs TIME_PERIOD="2024-04-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-04-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-04-12" OBS_VALUE="2.56672" BBK_DIFF_A="0.38441"/>
      <bbk:Obs TIME_PERIOD="2024-04-11" OBS_VALUE="2.18231" BBK_DIFF_A="-0.84943"/>
      <bbk:Obs TIME_PERIOD="2024-04-10" OBS_VALUE="3.03174" BBK_DIFF_A="0.72915"/>
      <bbk:Obs TIME_PERIOD="2024-04-09" OBS_VALUE="2.30259" BBK_DIFF_A="0.09645"/>
      <bbk:Obs TIME_PERIOD="2024-04-08" OBS_VALUE="2.20614" BBK_DIFF_A="-0.88936"/>
      <bbk:Obs TIME_PERIOD="2024-04-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-04-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-04-05" OBS_VALUE="3.0955" BBK_DIFF_A="-0.39629"/>
      <bbk:Obs TIME_PERIOD="2024-04-04" OBS_VALUE="3.49179" BBK_DIFF_A="0.01886"/>
      <bbk:Obs TIME_PERIOD="2024-04-03" OBS_VALUE="3.47293" BBK_DIFF_A="-0.03704"/>
      <bbk:Obs TIME_PERIOD="2024-04-02" OBS_VALUE="3.50997" BBK_DIFF_A="0.74289"/>
      <bbk:Obs TIME_PERIOD="2024-04-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-03-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-03-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-03-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-03-28" OBS_VALUE="2.76708" BBK_DIFF_A="-0.51836"/>
      <bbk:Obs TIME_PERIOD="2024-03-27" OBS_VALUE="3.28544" BBK_DIFF_A="-0.27849"/>
      <bbk:Obs TIME_PERIOD="2024-03-26" OBS_VALUE="3.56393" BBK_DIFF_A="-0.00802"/>
      <bbk:Obs TIME_PERIOD="2024-03-25" OBS_VALUE="3.57195" BBK_DIFF_A="0.22535"/>
      <bbk:Obs TIME_PERIOD="2024-03-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-03-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-03-22" OBS_VALUE="3.3466" BBK_DIFF_A="-0.1361"/>
      <bbk:Obs TIME_PERIOD="2024-03-21" OBS_VALUE="3.4827" BBK_DIFF_A="0.67241"/>
      <bbk:Obs TIME_PERIOD="2024-03-20" OBS_VALUE="2.81029" BBK_DIFF_A="-0.74037"/>
      <bbk:Obs TIME_PERIOD="2024-03-19" OBS_VALUE="3.55066" BBK_DIFF_A="0.00122"/>
      <bbk:Obs TIME_PERIOD="2024-03-18" OBS_VALUE="3.54944" BBK_DIFF_A="-0.0194"/>
      <bbk:Obs TIME_PERIOD="2024-03-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-03-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-03-15" OBS_VALUE="3.56884" BBK_DIFF_A="-0.08144"/>
      <bbk:Obs TIME_PERIOD="2024-03-14" OBS_VALUE="3.65028" BBK_DIFF_A="-0.14158"/>
      <bbk:Obs TIME_PERIOD="2024-03-13" OBS_VALUE="3.79186" BBK_DIFF_A="0.04668"/>
      <bbk:Obs TIME_PERIOD="2024-03-12" OBS_VALUE="3.74518" BBK_DIFF_A="-0.01274"/>
      <bbk:Obs TIME_PERIOD="2024-03-11" OBS_VALUE="3.75792" BBK_DIFF_A="2.5E-4"/>
      <bbk:Obs TIME_PERIOD="2024-03-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-03-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-03-08" OBS_VALUE="3.75767" BBK_DIFF_A="0.01039"/>
      <bbk:Obs TIME_PERIOD="2024-03-07" OBS_VALUE="3.74728" BBK_DIFF_A="0.49332"/>
      <bbk:Obs TIME_PERIOD="2024-03-06" OBS_VALUE="3.25396" BBK_DIFF_A="-0.38364"/>
      <bbk:Obs TIME_PERIOD="2024-03-05" OBS_VALUE="3.6376" BBK_DIFF_A="-0.01871"/>
      <bbk:Obs TIME_PERIOD="2024-03-04" OBS_VALUE="3.65631" BBK_DIFF_A="0.06963"/>
      <bbk:Obs TIME_PERIOD="2024-03-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-03-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-03-01" OBS_VALUE="3.58668" BBK_DIFF_A="0.75564"/>
      <bbk:Obs TIME_PERIOD="2024-02-29" OBS_VALUE="2.83104" BBK_DIFF_A="-0.67045"/>
      <bbk:Obs TIME_PERIOD="2024-02-28" OBS_VALUE="3.50149" BBK_DIFF_A="0.04979"/>
      <bbk:Obs TIME_PERIOD="2024-02-27" OBS_VALUE="3.4517" BBK_DIFF_A="-0.18517"/>
      <bbk:Obs TIME_PERIOD="2024-02-26" OBS_VALUE="3.63687" BBK_DIFF_A="0.12795"/>
      <bbk:Obs TIME_PERIOD="2024-02-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-02-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-02-23" OBS_VALUE="3.50892" BBK_DIFF_A="-0.05502"/>
      <bbk:Obs TIME_PERIOD="2024-02-22" OBS_VALUE="3.56394" BBK_DIFF_A="-0.06408"/>
      <bbk:Obs TIME_PERIOD="2024-02-21" OBS_VALUE="3.62802" BBK_DIFF_A="0.00157"/>
      <bbk:Obs TIME_PERIOD="2024-02-20" OBS_VALUE="3.62645" BBK_DIFF_A="0.00511"/>
      <bbk:Obs TIME_PERIOD="2024-02-19" OBS_VALUE="3.62134" BBK_DIFF_A="-0.01049"/>
      <bbk:Obs TIME_PERIOD="2024-02-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-02-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-02-16" OBS_VALUE="3.63183" BBK_DIFF_A="-0.09819"/>
      <bbk:Obs TIME_PERIOD="2024-02-15" OBS_VALUE="3.73002" BBK_DIFF_A="0.05934"/>
      <bbk:Obs TIME_PERIOD="2024-02-14" OBS_VALUE="3.67068" BBK_DIFF_A="0.02287"/>
      <bbk:Obs TIME_PERIOD="2024-02-13" OBS_VALUE="3.64781" BBK_DIFF_A="0.00512"/>
      <bbk:Obs TIME_PERIOD="2024-02-12" OBS_VALUE="3.64269" BBK_DIFF_A="0.0425"/>
      <bbk:Obs TIME_PERIOD="2024-02-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-02-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-02-09" OBS_VALUE="3.60019" BBK_DIFF_A="-0.05849"/>
      <bbk:Obs TIME_PERIOD="2024-02-08" OBS_VALUE="3.65868" BBK_DIFF_A="-0.01739"/>
      <bbk:Obs TIME_PERIOD="2024-02-07" OBS_VALUE="3.67607" BBK_DIFF_A="-0.02919"/>
      <bbk:Obs TIME_PERIOD="2024-02-06" OBS_VALUE="3.70526" BBK_DIFF_A="-0.05433"/>
      <bbk:Obs TIME_PERIOD="2024-02-05" OBS_VALUE="3.75959" BBK_DIFF_A="-0.11845"/>
      <bbk:Obs TIME_PERIOD="2024-02-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-02-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-02-02" OBS_VALUE="3.87804" BBK_DIFF_A="0.08225"/>
      <bbk:Obs TIME_PERIOD="2024-02-01" OBS_VALUE="3.79579" BBK_DIFF_A="-0.03618"/>
      <bbk:Obs TIME_PERIOD="2024-01-31" OBS_VALUE="3.83197" BBK_DIFF_A="0.02251"/>
      <bbk:Obs TIME_PERIOD="2024-01-30" OBS_VALUE="3.80946" BBK_DIFF_A="-0.03852"/>
      <bbk:Obs TIME_PERIOD="2024-01-29" OBS_VALUE="3.84798" BBK_DIFF_A="0.0231"/>
      <bbk:Obs TIME_PERIOD="2024-01-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-01-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-01-26" OBS_VALUE="3.82488" BBK_DIFF_A="0.0681"/>
      <bbk:Obs TIME_PERIOD="2024-01-25" OBS_VALUE="3.75678" BBK_DIFF_A="-0.05154"/>
      <bbk:Obs TIME_PERIOD="2024-01-24" OBS_VALUE="3.80832" BBK_DIFF_A="-0.04447"/>
      <bbk:Obs TIME_PERIOD="2024-01-23" OBS_VALUE="3.85279" BBK_DIFF_A="-0.01684"/>
      <bbk:Obs TIME_PERIOD="2024-01-22" OBS_VALUE="3.86963" BBK_DIFF_A="0.03226"/>
      <bbk:Obs TIME_PERIOD="2024-01-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-01-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-01-19" OBS_VALUE="3.83737" BBK_DIFF_A="-0.02615"/>
      <bbk:Obs TIME_PERIOD="2024-01-18" OBS_VALUE="3.86352" BBK_DIFF_A="-0.0439"/>
      <bbk:Obs TIME_PERIOD="2024-01-17" OBS_VALUE="3.90742" BBK_DIFF_A="0.02851"/>
      <bbk:Obs TIME_PERIOD="2024-01-16" OBS_VALUE="3.87891" BBK_DIFF_A="0.02127"/>
      <bbk:Obs TIME_PERIOD="2024-01-15" OBS_VALUE="3.85764" BBK_DIFF_A="-0.03609"/>
      <bbk:Obs TIME_PERIOD="2024-01-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-01-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-01-12" OBS_VALUE="3.89373" BBK_DIFF_A="0.06112"/>
      <bbk:Obs TIME_PERIOD="2024-01-11" OBS_VALUE="3.83261" BBK_DIFF_A="-0.03906"/>
      <bbk:Obs TIME_PERIOD="2024-01-10" OBS_VALUE="3.87167" BBK_DIFF_A="0.03494"/>
      <bbk:Obs TIME_PERIOD="2024-01-09" OBS_VALUE="3.83673" BBK_DIFF_A="-0.02993"/>
      <bbk:Obs TIME_PERIOD="2024-01-08" OBS_VALUE="3.86666" BBK_DIFF_A="-0.03269"/>
      <bbk:Obs TIME_PERIOD="2024-01-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-01-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-01-05" OBS_VALUE="3.89935" BBK_DIFF_A="-0.03437"/>
      <bbk:Obs TIME_PERIOD="2024-01-04" OBS_VALUE="3.93372" BBK_DIFF_A="-0.00487"/>
      <bbk:Obs TIME_PERIOD="2024-01-03" OBS_VALUE="3.93859" BBK_DIFF_A="0.09556"/>
      <bbk:Obs TIME_PERIOD="2024-01-02" OBS_VALUE="3.84303" BBK_DIFF_A="-0.06527"/>
      <bbk:Obs TIME_PERIOD="2024-01-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-12-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-12-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-12-29" OBS_VALUE="3.9083" BBK_DIFF_A="-0.1095"/>
      <bbk:Obs TIME_PERIOD="2023-12-28" OBS_VALUE="4.0178" BBK_DIFF_A="0.00843"/>
      <bbk:Obs TIME_PERIOD="2023-12-27" OBS_VALUE="4.00937" BBK_DIFF_A="-0.01382"/>
      <bbk:Obs TIME_PERIOD="2023-12-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-12-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-12-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-12-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-12-22" OBS_VALUE="4.02319" BBK_DIFF_A="0.01003"/>
      <bbk:Obs TIME_PERIOD="2023-12-21" OBS_VALUE="4.01316" BBK_DIFF_A="-0.0078"/>
      <bbk:Obs TIME_PERIOD="2023-12-20" OBS_VALUE="4.02096" BBK_DIFF_A="0.07896"/>
      <bbk:Obs TIME_PERIOD="2023-12-19" OBS_VALUE="3.942" BBK_DIFF_A="-0.04936"/>
      <bbk:Obs TIME_PERIOD="2023-12-18" OBS_VALUE="3.99136" BBK_DIFF_A="0.08269"/>
      <bbk:Obs TIME_PERIOD="2023-12-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-12-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-12-15" OBS_VALUE="3.90867" BBK_DIFF_A="0.0637"/>
      <bbk:Obs TIME_PERIOD="2023-12-14" OBS_VALUE="3.84497" BBK_DIFF_A="0.22852"/>
      <bbk:Obs TIME_PERIOD="2023-12-13" OBS_VALUE="3.61645" BBK_DIFF_A="0.41252"/>
      <bbk:Obs TIME_PERIOD="2023-12-12" OBS_VALUE="3.20393" BBK_DIFF_A="-0.20164"/>
      <bbk:Obs TIME_PERIOD="2023-12-11" OBS_VALUE="3.40557" BBK_DIFF_A="0.20699"/>
      <bbk:Obs TIME_PERIOD="2023-12-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-12-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-12-08" OBS_VALUE="3.19858" BBK_DIFF_A="-0.55018"/>
      <bbk:Obs TIME_PERIOD="2023-12-07" OBS_VALUE="3.74876" BBK_DIFF_A="0.06592"/>
      <bbk:Obs TIME_PERIOD="2023-12-06" OBS_VALUE="3.68284" BBK_DIFF_A="0.12144"/>
      <bbk:Obs TIME_PERIOD="2023-12-05" OBS_VALUE="3.5614" BBK_DIFF_A="0.09887"/>
      <bbk:Obs TIME_PERIOD="2023-12-04" OBS_VALUE="3.46253" BBK_DIFF_A="0.86445"/>
      <bbk:Obs TIME_PERIOD="2023-12-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-12-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-12-01" OBS_VALUE="2.59808" BBK_DIFF_A="0.62587"/>
      <bbk:Obs TIME_PERIOD="2023-11-30" OBS_VALUE="1.97221" BBK_DIFF_A="-0.20901"/>
      <bbk:Obs TIME_PERIOD="2023-11-29" OBS_VALUE="2.18122" BBK_DIFF_A="-0.18282"/>
      <bbk:Obs TIME_PERIOD="2023-11-28" OBS_VALUE="2.36404" BBK_DIFF_A="-0.14621"/>
      <bbk:Obs TIME_PERIOD="2023-11-27" OBS_VALUE="2.51025" BBK_DIFF_A="0.0346"/>
      <bbk:Obs TIME_PERIOD="2023-11-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-11-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-11-24" OBS_VALUE="2.47565" BBK_DIFF_A="2.8E-4"/>
      <bbk:Obs TIME_PERIOD="2023-11-23" OBS_VALUE="2.47537" BBK_DIFF_A="-0.14553"/>
      <bbk:Obs TIME_PERIOD="2023-11-22" OBS_VALUE="2.6209" BBK_DIFF_A="0.14172"/>
      <bbk:Obs TIME_PERIOD="2023-11-21" OBS_VALUE="2.47918" BBK_DIFF_A="0.00606"/>
      <bbk:Obs TIME_PERIOD="2023-11-20" OBS_VALUE="2.47312" BBK_DIFF_A="0.10285"/>
      <bbk:Obs TIME_PERIOD="2023-11-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-11-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-11-17" OBS_VALUE="2.37027" BBK_DIFF_A="-0.20818"/>
      <bbk:Obs TIME_PERIOD="2023-11-16" OBS_VALUE="2.57845" BBK_DIFF_A="-0.20089"/>
      <bbk:Obs TIME_PERIOD="2023-11-15" OBS_VALUE="2.77934" BBK_DIFF_A="0.07192"/>
      <bbk:Obs TIME_PERIOD="2023-11-14" OBS_VALUE="2.70742" BBK_DIFF_A="0.01551"/>
      <bbk:Obs TIME_PERIOD="2023-11-13" OBS_VALUE="2.69191" BBK_DIFF_A="0.09331"/>
      <bbk:Obs TIME_PERIOD="2023-11-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-11-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-11-10" OBS_VALUE="2.5986" BBK_DIFF_A="-0.07376"/>
      <bbk:Obs TIME_PERIOD="2023-11-09" OBS_VALUE="2.67236" BBK_DIFF_A="-0.00112"/>
      <bbk:Obs TIME_PERIOD="2023-11-08" OBS_VALUE="2.67348" BBK_DIFF_A="0.13468"/>
      <bbk:Obs TIME_PERIOD="2023-11-07" OBS_VALUE="2.5388" BBK_DIFF_A="0.10595"/>
      <bbk:Obs TIME_PERIOD="2023-11-06" OBS_VALUE="2.43285" BBK_DIFF_A="0.04385"/>
      <bbk:Obs TIME_PERIOD="2023-11-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-11-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-11-03" OBS_VALUE="2.389" BBK_DIFF_A="0.01314"/>
      <bbk:Obs TIME_PERIOD="2023-11-02" OBS_VALUE="2.37586" BBK_DIFF_A="0.24581"/>
      <bbk:Obs TIME_PERIOD="2023-11-01" OBS_VALUE="2.13005" BBK_DIFF_A="-0.1407"/>
      <bbk:Obs TIME_PERIOD="2023-10-31" OBS_VALUE="2.27075" BBK_DIFF_A="0.09185"/>
      <bbk:Obs TIME_PERIOD="2023-10-30" OBS_VALUE="2.1789" BBK_DIFF_A="-0.03553"/>
      <bbk:Obs TIME_PERIOD="2023-10-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-10-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-10-27" OBS_VALUE="2.21443" BBK_DIFF_A="-0.03296"/>
      <bbk:Obs TIME_PERIOD="2023-10-26" OBS_VALUE="2.24739" BBK_DIFF_A="0.00925"/>
      <bbk:Obs TIME_PERIOD="2023-10-25" OBS_VALUE="2.23814" BBK_DIFF_A="-0.12016"/>
      <bbk:Obs TIME_PERIOD="2023-10-24" OBS_VALUE="2.3583" BBK_DIFF_A="0.2235"/>
      <bbk:Obs TIME_PERIOD="2023-10-23" OBS_VALUE="2.1348" BBK_DIFF_A="-0.08822"/>
      <bbk:Obs TIME_PERIOD="2023-10-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-10-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-10-20" OBS_VALUE="2.22302" BBK_DIFF_A="-0.05037"/>
      <bbk:Obs TIME_PERIOD="2023-10-19" OBS_VALUE="2.27339" BBK_DIFF_A="-0.03827"/>
      <bbk:Obs TIME_PERIOD="2023-10-18" OBS_VALUE="2.31166" BBK_DIFF_A="-0.11557"/>
      <bbk:Obs TIME_PERIOD="2023-10-17" OBS_VALUE="2.42723" BBK_DIFF_A="-0.01294"/>
      <bbk:Obs TIME_PERIOD="2023-10-16" OBS_VALUE="2.44017" BBK_DIFF_A="-0.11795"/>
      <bbk:Obs TIME_PERIOD="2023-10-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-10-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-10-13" OBS_VALUE="2.55812" BBK_DIFF_A="0.00153"/>
      <bbk:Obs TIME_PERIOD="2023-10-12" OBS_VALUE="2.55659" BBK_DIFF_A="-0.02002"/>
      <bbk:Obs TIME_PERIOD="2023-10-11" OBS_VALUE="2.57661" BBK_DIFF_A="0.19656"/>
      <bbk:Obs TIME_PERIOD="2023-10-10" OBS_VALUE="2.38005" BBK_DIFF_A="0.04323"/>
      <bbk:Obs TIME_PERIOD="2023-10-09" OBS_VALUE="2.33682" BBK_DIFF_A="0.11485"/>
      <bbk:Obs TIME_PERIOD="2023-10-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-10-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-10-06" OBS_VALUE="2.22197" BBK_DIFF_A="-0.04381"/>
      <bbk:Obs TIME_PERIOD="2023-10-05" OBS_VALUE="2.26578" BBK_DIFF_A="0.04297"/>
      <bbk:Obs TIME_PERIOD="2023-10-04" OBS_VALUE="2.22281" BBK_DIFF_A="-0.03232"/>
      <bbk:Obs TIME_PERIOD="2023-10-03" OBS_VALUE="2.25513" BBK_DIFF_A="0.10967"/>
      <bbk:Obs TIME_PERIOD="2023-10-02" OBS_VALUE="2.14546" BBK_DIFF_A="0.29709"/>
      <bbk:Obs TIME_PERIOD="2023-10-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-09-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-09-29" OBS_VALUE="1.84837" BBK_DIFF_A="0.13781"/>
      <bbk:Obs TIME_PERIOD="2023-09-28" OBS_VALUE="1.71056" BBK_DIFF_A="-0.53836"/>
      <bbk:Obs TIME_PERIOD="2023-09-27" OBS_VALUE="2.24892" BBK_DIFF_A="0.0059"/>
      <bbk:Obs TIME_PERIOD="2023-09-26" OBS_VALUE="2.24302" BBK_DIFF_A="0.01057"/>
      <bbk:Obs TIME_PERIOD="2023-09-25" OBS_VALUE="2.23245" BBK_DIFF_A="-0.179"/>
      <bbk:Obs TIME_PERIOD="2023-09-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-09-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-09-22" OBS_VALUE="2.41145" BBK_DIFF_A="-0.09435"/>
      <bbk:Obs TIME_PERIOD="2023-09-21" OBS_VALUE="2.5058" BBK_DIFF_A="0.12869"/>
      <bbk:Obs TIME_PERIOD="2023-09-20" OBS_VALUE="2.37711" BBK_DIFF_A="-0.12655"/>
      <bbk:Obs TIME_PERIOD="2023-09-19" OBS_VALUE="2.50366" BBK_DIFF_A="0.08715"/>
      <bbk:Obs TIME_PERIOD="2023-09-18" OBS_VALUE="2.41651" BBK_DIFF_A="-0.06893"/>
      <bbk:Obs TIME_PERIOD="2023-09-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-09-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-09-15" OBS_VALUE="2.48544" BBK_DIFF_A="0.13689"/>
      <bbk:Obs TIME_PERIOD="2023-09-14" OBS_VALUE="2.34855" BBK_DIFF_A="0.24196"/>
      <bbk:Obs TIME_PERIOD="2023-09-13" OBS_VALUE="2.10659" BBK_DIFF_A="-0.49327"/>
      <bbk:Obs TIME_PERIOD="2023-09-12" OBS_VALUE="2.59986" BBK_DIFF_A="0.03693"/>
      <bbk:Obs TIME_PERIOD="2023-09-11" OBS_VALUE="2.56293" BBK_DIFF_A="0.01045"/>
      <bbk:Obs TIME_PERIOD="2023-09-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-09-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-09-08" OBS_VALUE="2.55248" BBK_DIFF_A="0.04951"/>
      <bbk:Obs TIME_PERIOD="2023-09-07" OBS_VALUE="2.50297" BBK_DIFF_A="0.0116"/>
      <bbk:Obs TIME_PERIOD="2023-09-06" OBS_VALUE="2.49137" BBK_DIFF_A="-0.043"/>
      <bbk:Obs TIME_PERIOD="2023-09-05" OBS_VALUE="2.53437" BBK_DIFF_A="-0.03264"/>
      <bbk:Obs TIME_PERIOD="2023-09-04" OBS_VALUE="2.56701" BBK_DIFF_A="-0.15671"/>
      <bbk:Obs TIME_PERIOD="2023-09-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-09-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-09-01" OBS_VALUE="2.72372" BBK_DIFF_A="0.05562"/>
      <bbk:Obs TIME_PERIOD="2023-08-31" OBS_VALUE="2.6681" BBK_DIFF_A="0.09229"/>
      <bbk:Obs TIME_PERIOD="2023-08-30" OBS_VALUE="2.57581" BBK_DIFF_A="0.03122"/>
      <bbk:Obs TIME_PERIOD="2023-08-29" OBS_VALUE="2.54459" BBK_DIFF_A="-0.0445"/>
      <bbk:Obs TIME_PERIOD="2023-08-28" OBS_VALUE="2.58909" BBK_DIFF_A="-0.00882"/>
      <bbk:Obs TIME_PERIOD="2023-08-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-08-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-08-25" OBS_VALUE="2.59791" BBK_DIFF_A="-0.03063"/>
      <bbk:Obs TIME_PERIOD="2023-08-24" OBS_VALUE="2.62854" BBK_DIFF_A="0.13717"/>
      <bbk:Obs TIME_PERIOD="2023-08-23" OBS_VALUE="2.49137" BBK_DIFF_A="0.05218"/>
      <bbk:Obs TIME_PERIOD="2023-08-22" OBS_VALUE="2.43919" BBK_DIFF_A="2.5E-4"/>
      <bbk:Obs TIME_PERIOD="2023-08-21" OBS_VALUE="2.43894" BBK_DIFF_A="-0.08931"/>
      <bbk:Obs TIME_PERIOD="2023-08-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-08-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-08-18" OBS_VALUE="2.52825" BBK_DIFF_A="0.08607"/>
      <bbk:Obs TIME_PERIOD="2023-08-17" OBS_VALUE="2.44218" BBK_DIFF_A="0.03613"/>
      <bbk:Obs TIME_PERIOD="2023-08-16" OBS_VALUE="2.40605" BBK_DIFF_A="-0.02508"/>
      <bbk:Obs TIME_PERIOD="2023-08-15" OBS_VALUE="2.43113" BBK_DIFF_A="-0.09721"/>
      <bbk:Obs TIME_PERIOD="2023-08-14" OBS_VALUE="2.52834" BBK_DIFF_A="-0.03454"/>
      <bbk:Obs TIME_PERIOD="2023-08-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-08-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-08-11" OBS_VALUE="2.56288" BBK_DIFF_A="-0.1161"/>
      <bbk:Obs TIME_PERIOD="2023-08-10" OBS_VALUE="2.67898" BBK_DIFF_A="-0.03085"/>
      <bbk:Obs TIME_PERIOD="2023-08-09" OBS_VALUE="2.70983" BBK_DIFF_A="0.02123"/>
      <bbk:Obs TIME_PERIOD="2023-08-08" OBS_VALUE="2.6886" BBK_DIFF_A="0.11444"/>
      <bbk:Obs TIME_PERIOD="2023-08-07" OBS_VALUE="2.57416" BBK_DIFF_A="-0.06514"/>
      <bbk:Obs TIME_PERIOD="2023-08-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-08-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-08-04" OBS_VALUE="2.6393" BBK_DIFF_A="0.00998"/>
      <bbk:Obs TIME_PERIOD="2023-08-03" OBS_VALUE="2.62932" BBK_DIFF_A="-0.03877"/>
      <bbk:Obs TIME_PERIOD="2023-08-02" OBS_VALUE="2.66809" BBK_DIFF_A="-0.05579"/>
      <bbk:Obs TIME_PERIOD="2023-08-01" OBS_VALUE="2.72388" BBK_DIFF_A="0.05139"/>
      <bbk:Obs TIME_PERIOD="2023-07-31" OBS_VALUE="2.67249" BBK_DIFF_A="-0.07946"/>
      <bbk:Obs TIME_PERIOD="2023-07-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-07-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-07-28" OBS_VALUE="2.75195" BBK_DIFF_A="5.1E-4"/>
      <bbk:Obs TIME_PERIOD="2023-07-27" OBS_VALUE="2.75144" BBK_DIFF_A="-0.12372"/>
      <bbk:Obs TIME_PERIOD="2023-07-26" OBS_VALUE="2.87516" BBK_DIFF_A="-0.0314"/>
      <bbk:Obs TIME_PERIOD="2023-07-25" OBS_VALUE="2.90656" BBK_DIFF_A="-0.07257"/>
      <bbk:Obs TIME_PERIOD="2023-07-24" OBS_VALUE="2.97913" BBK_DIFF_A="0.08148"/>
      <bbk:Obs TIME_PERIOD="2023-07-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-07-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-07-21" OBS_VALUE="2.89765" BBK_DIFF_A="-0.01992"/>
      <bbk:Obs TIME_PERIOD="2023-07-20" OBS_VALUE="2.91757" BBK_DIFF_A="-0.12756"/>
      <bbk:Obs TIME_PERIOD="2023-07-19" OBS_VALUE="3.04513" BBK_DIFF_A="0.07407"/>
      <bbk:Obs TIME_PERIOD="2023-07-18" OBS_VALUE="2.97106" BBK_DIFF_A="0.0889"/>
      <bbk:Obs TIME_PERIOD="2023-07-17" OBS_VALUE="2.88216" BBK_DIFF_A="2.08623"/>
      <bbk:Obs TIME_PERIOD="2023-07-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-07-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-07-14" OBS_VALUE="0.79593" BBK_DIFF_A="-0.00597"/>
      <bbk:Obs TIME_PERIOD="2023-07-13" OBS_VALUE="0.8019" BBK_DIFF_A="0.14892"/>
      <bbk:Obs TIME_PERIOD="2023-07-12" OBS_VALUE="0.65298" BBK_DIFF_A="-0.07496"/>
      <bbk:Obs TIME_PERIOD="2023-07-11" OBS_VALUE="0.72794" BBK_DIFF_A="0.09748"/>
      <bbk:Obs TIME_PERIOD="2023-07-10" OBS_VALUE="0.63046" BBK_DIFF_A="-0.04397"/>
      <bbk:Obs TIME_PERIOD="2023-07-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-07-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-07-07" OBS_VALUE="0.67443" BBK_DIFF_A="-0.0804"/>
      <bbk:Obs TIME_PERIOD="2023-07-06" OBS_VALUE="0.75483" BBK_DIFF_A="-0.13859"/>
      <bbk:Obs TIME_PERIOD="2023-07-05" OBS_VALUE="0.89342" BBK_DIFF_A="0.05236"/>
      <bbk:Obs TIME_PERIOD="2023-07-04" OBS_VALUE="0.84106" BBK_DIFF_A="-0.11539"/>
      <bbk:Obs TIME_PERIOD="2023-07-03" OBS_VALUE="0.95645" BBK_DIFF_A="0.08934"/>
      <bbk:Obs TIME_PERIOD="2023-07-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-07-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-06-30" OBS_VALUE="0.86711" BBK_DIFF_A="-0.07198"/>
      <bbk:Obs TIME_PERIOD="2023-06-29" OBS_VALUE="0.93909" BBK_DIFF_A="0.00618"/>
      <bbk:Obs TIME_PERIOD="2023-06-28" OBS_VALUE="0.93291" BBK_DIFF_A="-0.00877"/>
      <bbk:Obs TIME_PERIOD="2023-06-27" OBS_VALUE="0.94168" BBK_DIFF_A="0.01661"/>
      <bbk:Obs TIME_PERIOD="2023-06-26" OBS_VALUE="0.92507" BBK_DIFF_A="0.02698"/>
      <bbk:Obs TIME_PERIOD="2023-06-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-06-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-06-23" OBS_VALUE="0.89809" BBK_DIFF_A="0.1124"/>
      <bbk:Obs TIME_PERIOD="2023-06-22" OBS_VALUE="0.78569" BBK_DIFF_A="0.00929"/>
      <bbk:Obs TIME_PERIOD="2023-06-21" OBS_VALUE="0.7764" BBK_DIFF_A="0.11059"/>
      <bbk:Obs TIME_PERIOD="2023-06-20" OBS_VALUE="0.66581" BBK_DIFF_A="0.02608"/>
      <bbk:Obs TIME_PERIOD="2023-06-19" OBS_VALUE="0.63973" BBK_DIFF_A="-2.48269"/>
      <bbk:Obs TIME_PERIOD="2023-06-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-06-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-06-16" OBS_VALUE="3.12242" BBK_DIFF_A="0.08607"/>
      <bbk:Obs TIME_PERIOD="2023-06-15" OBS_VALUE="3.03635" BBK_DIFF_A="-0.00116"/>
      <bbk:Obs TIME_PERIOD="2023-06-14" OBS_VALUE="3.03751" BBK_DIFF_A="2.50401"/>
      <bbk:Obs TIME_PERIOD="2023-06-13" OBS_VALUE="0.5335" BBK_DIFF_A="0.00523"/>
      <bbk:Obs TIME_PERIOD="2023-06-12" OBS_VALUE="0.52827" BBK_DIFF_A="0.09338"/>
      <bbk:Obs TIME_PERIOD="2023-06-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-06-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-06-09" OBS_VALUE="0.43489" BBK_DIFF_A="0.04803"/>
      <bbk:Obs TIME_PERIOD="2023-06-08" OBS_VALUE="0.38686" BBK_DIFF_A="-0.08956"/>
      <bbk:Obs TIME_PERIOD="2023-06-07" OBS_VALUE="0.47642" BBK_DIFF_A="0.00942"/>
      <bbk:Obs TIME_PERIOD="2023-06-06" OBS_VALUE="0.467" BBK_DIFF_A="0.08695"/>
      <bbk:Obs TIME_PERIOD="2023-06-05" OBS_VALUE="0.38005" BBK_DIFF_A="-2.54873"/>
      <bbk:Obs TIME_PERIOD="2023-06-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-06-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-06-02" OBS_VALUE="2.92878" BBK_DIFF_A="0.02524"/>
      <bbk:Obs TIME_PERIOD="2023-06-01" OBS_VALUE="2.90354" BBK_DIFF_A="0.03869"/>
      <bbk:Obs TIME_PERIOD="2023-05-31" OBS_VALUE="2.86485" BBK_DIFF_A="2.61421"/>
      <bbk:Obs TIME_PERIOD="2023-05-30" OBS_VALUE="0.25064" BBK_DIFF_A="-2.49402"/>
      <bbk:Obs TIME_PERIOD="2023-05-29" OBS_VALUE="2.74466" BBK_DIFF_A="0.09206"/>
      <bbk:Obs TIME_PERIOD="2023-05-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-05-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-05-26" OBS_VALUE="2.6526" BBK_DIFF_A="-0.02041"/>
      <bbk:Obs TIME_PERIOD="2023-05-25" OBS_VALUE="2.67301" BBK_DIFF_A="0.00217"/>
      <bbk:Obs TIME_PERIOD="2023-05-24" OBS_VALUE="2.67084" BBK_DIFF_A="0.05192"/>
      <bbk:Obs TIME_PERIOD="2023-05-23" OBS_VALUE="2.61892" BBK_DIFF_A="-0.05298"/>
      <bbk:Obs TIME_PERIOD="2023-05-22" OBS_VALUE="2.6719" BBK_DIFF_A="0.04013"/>
      <bbk:Obs TIME_PERIOD="2023-05-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-05-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-05-19" OBS_VALUE="2.63177" BBK_DIFF_A="-0.06654"/>
      <bbk:Obs TIME_PERIOD="2023-05-18" OBS_VALUE="2.69831" BBK_DIFF_A="-0.06335"/>
      <bbk:Obs TIME_PERIOD="2023-05-17" OBS_VALUE="2.76166" BBK_DIFF_A="-0.0026"/>
      <bbk:Obs TIME_PERIOD="2023-05-16" OBS_VALUE="2.76426" BBK_DIFF_A="0.12278"/>
      <bbk:Obs TIME_PERIOD="2023-05-15" OBS_VALUE="2.64148" BBK_DIFF_A="2.17091"/>
      <bbk:Obs TIME_PERIOD="2023-05-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-05-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-05-12" OBS_VALUE="0.47057" BBK_DIFF_A="0.2117"/>
      <bbk:Obs TIME_PERIOD="2023-05-11" OBS_VALUE="0.25887" BBK_DIFF_A="-2.43951"/>
      <bbk:Obs TIME_PERIOD="2023-05-10" OBS_VALUE="2.69838" BBK_DIFF_A="-0.00253"/>
      <bbk:Obs TIME_PERIOD="2023-05-09" OBS_VALUE="2.70091" BBK_DIFF_A="0.00172"/>
      <bbk:Obs TIME_PERIOD="2023-05-08" OBS_VALUE="2.69919" BBK_DIFF_A="-0.05674"/>
      <bbk:Obs TIME_PERIOD="2023-05-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-05-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-05-05" OBS_VALUE="2.75593" BBK_DIFF_A="2.44355"/>
      <bbk:Obs TIME_PERIOD="2023-05-04" OBS_VALUE="0.31238" BBK_DIFF_A="0.029"/>
      <bbk:Obs TIME_PERIOD="2023-05-03" OBS_VALUE="0.28338" BBK_DIFF_A="0.10389"/>
      <bbk:Obs TIME_PERIOD="2023-05-02" OBS_VALUE="0.17949" BBK_DIFF_A="0.01122"/>
      <bbk:Obs TIME_PERIOD="2023-05-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-04-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-04-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-04-28" OBS_VALUE="0.16827" BBK_DIFF_A="-0.0388"/>
      <bbk:Obs TIME_PERIOD="2023-04-27" OBS_VALUE="0.20707" BBK_DIFF_A="-0.0949"/>
      <bbk:Obs TIME_PERIOD="2023-04-26" OBS_VALUE="0.30197" BBK_DIFF_A="0.1628"/>
      <bbk:Obs TIME_PERIOD="2023-04-25" OBS_VALUE="0.13917" BBK_DIFF_A="-4.3E-4"/>
      <bbk:Obs TIME_PERIOD="2023-04-24" OBS_VALUE="0.1396" BBK_DIFF_A="0.0059"/>
      <bbk:Obs TIME_PERIOD="2023-04-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-04-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-04-21" OBS_VALUE="0.1337" BBK_DIFF_A="0.00725"/>
      <bbk:Obs TIME_PERIOD="2023-04-20" OBS_VALUE="0.12645" BBK_DIFF_A="0.06947"/>
      <bbk:Obs TIME_PERIOD="2023-04-19" OBS_VALUE="0.05698" BBK_DIFF_A="-0.00288"/>
      <bbk:Obs TIME_PERIOD="2023-04-18" OBS_VALUE="0.05986" BBK_DIFF_A="-0.06503"/>
      <bbk:Obs TIME_PERIOD="2023-04-17" OBS_VALUE="0.12489" BBK_DIFF_A="-2.61785"/>
      <bbk:Obs TIME_PERIOD="2023-04-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-04-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-04-14" OBS_VALUE="2.74274" BBK_DIFF_A="0.02119"/>
      <bbk:Obs TIME_PERIOD="2023-04-13" OBS_VALUE="2.72155" BBK_DIFF_A="-0.04256"/>
      <bbk:Obs TIME_PERIOD="2023-04-12" OBS_VALUE="2.76411" BBK_DIFF_A="0.03122"/>
      <bbk:Obs TIME_PERIOD="2023-04-11" OBS_VALUE="2.73289" BBK_DIFF_A="-0.00918"/>
      <bbk:Obs TIME_PERIOD="2023-04-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-04-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-04-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-04-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-04-06" OBS_VALUE="2.74207" BBK_DIFF_A="0.05171"/>
      <bbk:Obs TIME_PERIOD="2023-04-05" OBS_VALUE="2.69036" BBK_DIFF_A="0.00234"/>
      <bbk:Obs TIME_PERIOD="2023-04-04" OBS_VALUE="2.68802" BBK_DIFF_A="0.04335"/>
      <bbk:Obs TIME_PERIOD="2023-04-03" OBS_VALUE="2.64467" BBK_DIFF_A="-0.01335"/>
      <bbk:Obs TIME_PERIOD="2023-04-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-04-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-03-31" OBS_VALUE="2.65802" BBK_DIFF_A="0.07685"/>
      <bbk:Obs TIME_PERIOD="2023-03-30" OBS_VALUE="2.58117" BBK_DIFF_A="-0.019"/>
      <bbk:Obs TIME_PERIOD="2023-03-29" OBS_VALUE="2.60017" BBK_DIFF_A="-0.01328"/>
      <bbk:Obs TIME_PERIOD="2023-03-28" OBS_VALUE="2.61345" BBK_DIFF_A="-0.07508"/>
      <bbk:Obs TIME_PERIOD="2023-03-27" OBS_VALUE="2.68853" BBK_DIFF_A="0.67757"/>
      <bbk:Obs TIME_PERIOD="2023-03-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-03-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-03-24" OBS_VALUE="2.01096" BBK_DIFF_A="-0.68165"/>
      <bbk:Obs TIME_PERIOD="2023-03-23" OBS_VALUE="2.69261" BBK_DIFF_A="0.03344"/>
      <bbk:Obs TIME_PERIOD="2023-03-22" OBS_VALUE="2.65917" BBK_DIFF_A="0.0945"/>
      <bbk:Obs TIME_PERIOD="2023-03-21" OBS_VALUE="2.56467" BBK_DIFF_A="-0.0228"/>
      <bbk:Obs TIME_PERIOD="2023-03-20" OBS_VALUE="2.58747" BBK_DIFF_A="0.24387"/>
      <bbk:Obs TIME_PERIOD="2023-03-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-03-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-03-17" OBS_VALUE="2.3436" BBK_DIFF_A="0.13897"/>
      <bbk:Obs TIME_PERIOD="2023-03-16" OBS_VALUE="2.20463" BBK_DIFF_A="0.46668"/>
      <bbk:Obs TIME_PERIOD="2023-03-15" OBS_VALUE="1.73795" BBK_DIFF_A="0.77132"/>
      <bbk:Obs TIME_PERIOD="2023-03-14" OBS_VALUE="0.96663" BBK_DIFF_A="-0.99754"/>
      <bbk:Obs TIME_PERIOD="2023-03-13" OBS_VALUE="1.96417" BBK_DIFF_A="-0.02843"/>
      <bbk:Obs TIME_PERIOD="2023-03-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-03-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-03-10" OBS_VALUE="1.9926" BBK_DIFF_A="0.41478"/>
      <bbk:Obs TIME_PERIOD="2023-03-09" OBS_VALUE="1.57782" BBK_DIFF_A="-0.11794"/>
      <bbk:Obs TIME_PERIOD="2023-03-08" OBS_VALUE="1.69576" BBK_DIFF_A="0.18717"/>
      <bbk:Obs TIME_PERIOD="2023-03-07" OBS_VALUE="1.50859" BBK_DIFF_A="-0.05572"/>
      <bbk:Obs TIME_PERIOD="2023-03-06" OBS_VALUE="1.56431" BBK_DIFF_A="0.02701"/>
      <bbk:Obs TIME_PERIOD="2023-03-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-03-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-03-03" OBS_VALUE="1.5373" BBK_DIFF_A="0.29953"/>
      <bbk:Obs TIME_PERIOD="2023-03-02" OBS_VALUE="1.23777" BBK_DIFF_A="-0.28418"/>
      <bbk:Obs TIME_PERIOD="2023-03-01" OBS_VALUE="1.52195" BBK_DIFF_A="-0.07201"/>
      <bbk:Obs TIME_PERIOD="2023-02-28" OBS_VALUE="1.59396" BBK_DIFF_A="0.06516"/>
      <bbk:Obs TIME_PERIOD="2023-02-27" OBS_VALUE="1.5288" BBK_DIFF_A="-0.12411"/>
      <bbk:Obs TIME_PERIOD="2023-02-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-02-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-02-24" OBS_VALUE="1.65291" BBK_DIFF_A="0.27364"/>
      <bbk:Obs TIME_PERIOD="2023-02-23" OBS_VALUE="1.37927" BBK_DIFF_A="-0.19921"/>
      <bbk:Obs TIME_PERIOD="2023-02-22" OBS_VALUE="1.57848" BBK_DIFF_A="-0.02215"/>
      <bbk:Obs TIME_PERIOD="2023-02-21" OBS_VALUE="1.60063" BBK_DIFF_A="-0.34297"/>
      <bbk:Obs TIME_PERIOD="2023-02-20" OBS_VALUE="1.9436" BBK_DIFF_A="0.28436"/>
      <bbk:Obs TIME_PERIOD="2023-02-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-02-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-02-17" OBS_VALUE="1.65924" BBK_DIFF_A="-0.3175"/>
      <bbk:Obs TIME_PERIOD="2023-02-16" OBS_VALUE="1.97674" BBK_DIFF_A="0.28604"/>
      <bbk:Obs TIME_PERIOD="2023-02-15" OBS_VALUE="1.6907" BBK_DIFF_A="0.05519"/>
      <bbk:Obs TIME_PERIOD="2023-02-14" OBS_VALUE="1.63551" BBK_DIFF_A="0.0483"/>
      <bbk:Obs TIME_PERIOD="2023-02-13" OBS_VALUE="1.58721" BBK_DIFF_A="0.12719"/>
      <bbk:Obs TIME_PERIOD="2023-02-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-02-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-02-10" OBS_VALUE="1.46002" BBK_DIFF_A="-0.12212"/>
      <bbk:Obs TIME_PERIOD="2023-02-09" OBS_VALUE="1.58214" BBK_DIFF_A="0.05433"/>
      <bbk:Obs TIME_PERIOD="2023-02-08" OBS_VALUE="1.52781" BBK_DIFF_A="0.19382"/>
      <bbk:Obs TIME_PERIOD="2023-02-07" OBS_VALUE="1.33399" BBK_DIFF_A="-0.2115"/>
      <bbk:Obs TIME_PERIOD="2023-02-06" OBS_VALUE="1.54549" BBK_DIFF_A="-0.28236"/>
      <bbk:Obs TIME_PERIOD="2023-02-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-02-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-02-03" OBS_VALUE="1.82785" BBK_DIFF_A="0.04033"/>
      <bbk:Obs TIME_PERIOD="2023-02-02" OBS_VALUE="1.78752" BBK_DIFF_A="-0.03396"/>
      <bbk:Obs TIME_PERIOD="2023-02-01" OBS_VALUE="1.82148" BBK_DIFF_A="0.28627"/>
      <bbk:Obs TIME_PERIOD="2023-01-31" OBS_VALUE="1.53521" BBK_DIFF_A="0.10371"/>
      <bbk:Obs TIME_PERIOD="2023-01-30" OBS_VALUE="1.4315" BBK_DIFF_A="-0.28564"/>
      <bbk:Obs TIME_PERIOD="2023-01-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-01-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-01-27" OBS_VALUE="1.71714" BBK_DIFF_A="-0.1095"/>
      <bbk:Obs TIME_PERIOD="2023-01-26" OBS_VALUE="1.82664" BBK_DIFF_A="-0.12587"/>
      <bbk:Obs TIME_PERIOD="2023-01-25" OBS_VALUE="1.95251" BBK_DIFF_A="0.01882"/>
      <bbk:Obs TIME_PERIOD="2023-01-24" OBS_VALUE="1.93369" BBK_DIFF_A="0.08292"/>
      <bbk:Obs TIME_PERIOD="2023-01-23" OBS_VALUE="1.85077" BBK_DIFF_A="0.05388"/>
      <bbk:Obs TIME_PERIOD="2023-01-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-01-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-01-20" OBS_VALUE="1.79689" BBK_DIFF_A="-0.01974"/>
      <bbk:Obs TIME_PERIOD="2023-01-19" OBS_VALUE="1.81663" BBK_DIFF_A="0.27454"/>
      <bbk:Obs TIME_PERIOD="2023-01-18" OBS_VALUE="1.54209" BBK_DIFF_A="0.2574"/>
      <bbk:Obs TIME_PERIOD="2023-01-17" OBS_VALUE="1.28469" BBK_DIFF_A="-0.24677"/>
      <bbk:Obs TIME_PERIOD="2023-01-16" OBS_VALUE="1.53146" BBK_DIFF_A="-0.09676"/>
      <bbk:Obs TIME_PERIOD="2023-01-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-01-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-01-13" OBS_VALUE="1.62822" BBK_DIFF_A="0.03648"/>
      <bbk:Obs TIME_PERIOD="2023-01-12" OBS_VALUE="1.59174" BBK_DIFF_A="0.6938"/>
      <bbk:Obs TIME_PERIOD="2023-01-11" OBS_VALUE="0.89794" BBK_DIFF_A="-0.22045"/>
      <bbk:Obs TIME_PERIOD="2023-01-10" OBS_VALUE="1.11839" BBK_DIFF_A="0.26257"/>
      <bbk:Obs TIME_PERIOD="2023-01-09" OBS_VALUE="0.85582" BBK_DIFF_A="0.27354"/>
      <bbk:Obs TIME_PERIOD="2023-01-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-01-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2023-01-06" OBS_VALUE="0.58228" BBK_DIFF_A="-0.09834"/>
      <bbk:Obs TIME_PERIOD="2023-01-05" OBS_VALUE="0.68062" BBK_DIFF_A="0.54502"/>
      <bbk:Obs TIME_PERIOD="2023-01-04" OBS_VALUE="0.1356" BBK_DIFF_A="-0.00146"/>
      <bbk:Obs TIME_PERIOD="2023-01-03" OBS_VALUE="0.13706" BBK_DIFF_A="-0.07492"/>
      <bbk:Obs TIME_PERIOD="2023-01-02" OBS_VALUE="0.21198" BBK_DIFF_A="0.13166"/>
      <bbk:Obs TIME_PERIOD="2023-01-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-12-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-12-30" OBS_VALUE="0.08032" BBK_DIFF_A="-0.52942"/>
      <bbk:Obs TIME_PERIOD="2022-12-29" OBS_VALUE="0.60974" BBK_DIFF_A="0.26489"/>
      <bbk:Obs TIME_PERIOD="2022-12-28" OBS_VALUE="0.34485" BBK_DIFF_A="-0.27231"/>
      <bbk:Obs TIME_PERIOD="2022-12-27" OBS_VALUE="0.61716" BBK_DIFF_A="-0.09063"/>
      <bbk:Obs TIME_PERIOD="2022-12-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-12-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-12-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-12-23" OBS_VALUE="0.70779" BBK_DIFF_A="-0.00783"/>
      <bbk:Obs TIME_PERIOD="2022-12-22" OBS_VALUE="0.71562" BBK_DIFF_A="0.09093"/>
      <bbk:Obs TIME_PERIOD="2022-12-21" OBS_VALUE="0.62469" BBK_DIFF_A="0.03797"/>
      <bbk:Obs TIME_PERIOD="2022-12-20" OBS_VALUE="0.58672" BBK_DIFF_A="0.11053"/>
      <bbk:Obs TIME_PERIOD="2022-12-19" OBS_VALUE="0.47619" BBK_DIFF_A="0.13494"/>
      <bbk:Obs TIME_PERIOD="2022-12-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-12-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-12-16" OBS_VALUE="0.34125" BBK_DIFF_A="-0.70809"/>
      <bbk:Obs TIME_PERIOD="2022-12-15" OBS_VALUE="1.04934" BBK_DIFF_A="0.252"/>
      <bbk:Obs TIME_PERIOD="2022-12-14" OBS_VALUE="0.79734" BBK_DIFF_A="-0.17966"/>
      <bbk:Obs TIME_PERIOD="2022-12-13" OBS_VALUE="0.977" BBK_DIFF_A="-0.10304"/>
      <bbk:Obs TIME_PERIOD="2022-12-12" OBS_VALUE="1.08004" BBK_DIFF_A="0.08813"/>
      <bbk:Obs TIME_PERIOD="2022-12-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-12-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-12-09" OBS_VALUE="0.99191" BBK_DIFF_A="0.07305"/>
      <bbk:Obs TIME_PERIOD="2022-12-08" OBS_VALUE="0.91886" BBK_DIFF_A="0.06729"/>
      <bbk:Obs TIME_PERIOD="2022-12-07" OBS_VALUE="0.85157" BBK_DIFF_A="0.17811"/>
      <bbk:Obs TIME_PERIOD="2022-12-06" OBS_VALUE="0.67346" BBK_DIFF_A="0.03751"/>
      <bbk:Obs TIME_PERIOD="2022-12-05" OBS_VALUE="0.63595" BBK_DIFF_A="-0.04556"/>
      <bbk:Obs TIME_PERIOD="2022-12-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-12-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-12-02" OBS_VALUE="0.68151" BBK_DIFF_A="0.6813"/>
      <bbk:Obs TIME_PERIOD="2022-12-01" OBS_VALUE="2.1E-4" BBK_DIFF_A="1.1E-4"/>
      <bbk:Obs TIME_PERIOD="2022-11-30" OBS_VALUE="1.0E-4" BBK_DIFF_A="1.4E-4"/>
      <bbk:Obs TIME_PERIOD="2022-11-29" OBS_VALUE="-4.0E-5" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2022-11-28" OBS_VALUE="-4.0E-5" BBK_DIFF_A="-1.2E-4"/>
      <bbk:Obs TIME_PERIOD="2022-11-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-11-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-11-25" OBS_VALUE="8.0E-5" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2022-11-24" OBS_VALUE="8.0E-5" BBK_DIFF_A="0.0039"/>
      <bbk:Obs TIME_PERIOD="2022-11-23" OBS_VALUE="-0.00382" BBK_DIFF_A="0.17316"/>
      <bbk:Obs TIME_PERIOD="2022-11-22" OBS_VALUE="-0.17698" BBK_DIFF_A="0.28501"/>
      <bbk:Obs TIME_PERIOD="2022-11-21" OBS_VALUE="-0.46199" BBK_DIFF_A="0.06505"/>
      <bbk:Obs TIME_PERIOD="2022-11-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-11-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-11-18" OBS_VALUE="-0.52704" BBK_DIFF_A="-0.19394"/>
      <bbk:Obs TIME_PERIOD="2022-11-17" OBS_VALUE="-0.3331" BBK_DIFF_A="0.49842"/>
      <bbk:Obs TIME_PERIOD="2022-11-16" OBS_VALUE="-0.83152" BBK_DIFF_A="0.46798"/>
      <bbk:Obs TIME_PERIOD="2022-11-15" OBS_VALUE="-1.2995" BBK_DIFF_A="-0.0019"/>
      <bbk:Obs TIME_PERIOD="2022-11-14" OBS_VALUE="-1.2976" BBK_DIFF_A="-0.44209"/>
      <bbk:Obs TIME_PERIOD="2022-11-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-11-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-11-11" OBS_VALUE="-0.85551" BBK_DIFF_A="1.1446"/>
      <bbk:Obs TIME_PERIOD="2022-11-10" OBS_VALUE="-2.00011" BBK_DIFF_A="0.10002"/>
      <bbk:Obs TIME_PERIOD="2022-11-09" OBS_VALUE="-2.10013" BBK_DIFF_A="0.04407"/>
      <bbk:Obs TIME_PERIOD="2022-11-08" OBS_VALUE="-2.1442" BBK_DIFF_A="-1.13468"/>
      <bbk:Obs TIME_PERIOD="2022-11-07" OBS_VALUE="-1.00952" BBK_DIFF_A="0.16824"/>
      <bbk:Obs TIME_PERIOD="2022-11-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-11-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-11-04" OBS_VALUE="-1.17776" BBK_DIFF_A="0.16096"/>
      <bbk:Obs TIME_PERIOD="2022-11-03" OBS_VALUE="-1.33872" BBK_DIFF_A="-0.08282"/>
      <bbk:Obs TIME_PERIOD="2022-11-02" OBS_VALUE="-1.2559" BBK_DIFF_A="0.11901"/>
      <bbk:Obs TIME_PERIOD="2022-11-01" OBS_VALUE="-1.37491" BBK_DIFF_A="0.52298"/>
      <bbk:Obs TIME_PERIOD="2022-10-31" OBS_VALUE="-1.89789" BBK_DIFF_A="-0.04539"/>
      <bbk:Obs TIME_PERIOD="2022-10-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-10-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-10-28" OBS_VALUE="-1.8525" BBK_DIFF_A="0.02875"/>
      <bbk:Obs TIME_PERIOD="2022-10-27" OBS_VALUE="-1.88125" BBK_DIFF_A="0.14884"/>
      <bbk:Obs TIME_PERIOD="2022-10-26" OBS_VALUE="-2.03009" BBK_DIFF_A="-0.19252"/>
      <bbk:Obs TIME_PERIOD="2022-10-25" OBS_VALUE="-1.83757" BBK_DIFF_A="0.3301"/>
      <bbk:Obs TIME_PERIOD="2022-10-24" OBS_VALUE="-2.16767" BBK_DIFF_A="0.34354"/>
      <bbk:Obs TIME_PERIOD="2022-10-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-10-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-10-21" OBS_VALUE="-2.51121" BBK_DIFF_A="-0.7508"/>
      <bbk:Obs TIME_PERIOD="2022-10-20" OBS_VALUE="-1.76041" BBK_DIFF_A="0.10244"/>
      <bbk:Obs TIME_PERIOD="2022-10-19" OBS_VALUE="-1.86285" BBK_DIFF_A="0.27541"/>
      <bbk:Obs TIME_PERIOD="2022-10-18" OBS_VALUE="-2.13826" BBK_DIFF_A="0.05377"/>
      <bbk:Obs TIME_PERIOD="2022-10-17" OBS_VALUE="-2.19203" BBK_DIFF_A="0.12011"/>
      <bbk:Obs TIME_PERIOD="2022-10-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-10-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-10-14" OBS_VALUE="-2.31214" BBK_DIFF_A="0.16973"/>
      <bbk:Obs TIME_PERIOD="2022-10-13" OBS_VALUE="-2.48187" BBK_DIFF_A="0.16062"/>
      <bbk:Obs TIME_PERIOD="2022-10-12" OBS_VALUE="-2.64249" BBK_DIFF_A="0.33826"/>
      <bbk:Obs TIME_PERIOD="2022-10-11" OBS_VALUE="-2.98075" BBK_DIFF_A="0.41228"/>
      <bbk:Obs TIME_PERIOD="2022-10-10" OBS_VALUE="-3.39303" BBK_DIFF_A="-0.03877"/>
      <bbk:Obs TIME_PERIOD="2022-10-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-10-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-10-07" OBS_VALUE="-3.35426" BBK_DIFF_A="-0.13764"/>
      <bbk:Obs TIME_PERIOD="2022-10-06" OBS_VALUE="-3.21662" BBK_DIFF_A="-0.29516"/>
      <bbk:Obs TIME_PERIOD="2022-10-05" OBS_VALUE="-2.92146" BBK_DIFF_A="0.6643"/>
      <bbk:Obs TIME_PERIOD="2022-10-04" OBS_VALUE="-3.58576" BBK_DIFF_A="1.98358"/>
      <bbk:Obs TIME_PERIOD="2022-10-03" OBS_VALUE="-5.56934" BBK_DIFF_A="3.19187"/>
      <bbk:Obs TIME_PERIOD="2022-10-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-10-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-09-30" OBS_VALUE="-8.76121" BBK_DIFF_A="-1.85327"/>
      <bbk:Obs TIME_PERIOD="2022-09-29" OBS_VALUE="-6.90794" BBK_DIFF_A="-0.71408"/>
      <bbk:Obs TIME_PERIOD="2022-09-28" OBS_VALUE="-6.19386" BBK_DIFF_A="-0.73319"/>
      <bbk:Obs TIME_PERIOD="2022-09-27" OBS_VALUE="-5.46067" BBK_DIFF_A="-1.59666"/>
      <bbk:Obs TIME_PERIOD="2022-09-26" OBS_VALUE="-3.86401" BBK_DIFF_A="0.43589"/>
      <bbk:Obs TIME_PERIOD="2022-09-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-09-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-09-23" OBS_VALUE="-4.2999" BBK_DIFF_A="0.62229"/>
      <bbk:Obs TIME_PERIOD="2022-09-22" OBS_VALUE="-4.92219" BBK_DIFF_A="1.98003"/>
      <bbk:Obs TIME_PERIOD="2022-09-21" OBS_VALUE="-6.90222" BBK_DIFF_A="-7.11523"/>
      <bbk:Obs TIME_PERIOD="2022-09-20" OBS_VALUE="0.21301" BBK_DIFF_A="0.05832"/>
      <bbk:Obs TIME_PERIOD="2022-09-19" OBS_VALUE="0.15469" BBK_DIFF_A="-0.0684"/>
      <bbk:Obs TIME_PERIOD="2022-09-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-09-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-09-16" OBS_VALUE="0.22309" BBK_DIFF_A="-0.04545"/>
      <bbk:Obs TIME_PERIOD="2022-09-15" OBS_VALUE="0.26854" BBK_DIFF_A="-0.05069"/>
      <bbk:Obs TIME_PERIOD="2022-09-14" OBS_VALUE="0.31923" BBK_DIFF_A="-7.0E-5"/>
      <bbk:Obs TIME_PERIOD="2022-09-13" OBS_VALUE="0.3193" BBK_DIFF_A="0.20673"/>
      <bbk:Obs TIME_PERIOD="2022-09-12" OBS_VALUE="0.11257" BBK_DIFF_A="-0.04166"/>
      <bbk:Obs TIME_PERIOD="2022-09-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-09-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-09-09" OBS_VALUE="0.15423" BBK_DIFF_A="0.23094"/>
      <bbk:Obs TIME_PERIOD="2022-09-08" OBS_VALUE="-0.07671" BBK_DIFF_A="0.2122"/>
      <bbk:Obs TIME_PERIOD="2022-09-07" OBS_VALUE="-0.28891" BBK_DIFF_A="-0.03516"/>
      <bbk:Obs TIME_PERIOD="2022-09-06" OBS_VALUE="-0.25375" BBK_DIFF_A="0.18483"/>
      <bbk:Obs TIME_PERIOD="2022-09-05" OBS_VALUE="-0.43858" BBK_DIFF_A="0.07097"/>
      <bbk:Obs TIME_PERIOD="2022-09-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-09-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-09-02" OBS_VALUE="-0.50955" BBK_DIFF_A="0.38083"/>
      <bbk:Obs TIME_PERIOD="2022-09-01" OBS_VALUE="-0.89038" BBK_DIFF_A="-0.16356"/>
      <bbk:Obs TIME_PERIOD="2022-08-31" OBS_VALUE="-0.72682" BBK_DIFF_A="-0.0814"/>
      <bbk:Obs TIME_PERIOD="2022-08-30" OBS_VALUE="-0.64542" BBK_DIFF_A="-0.12482"/>
      <bbk:Obs TIME_PERIOD="2022-08-29" OBS_VALUE="-0.5206" BBK_DIFF_A="-0.21972"/>
      <bbk:Obs TIME_PERIOD="2022-08-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-08-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-08-26" OBS_VALUE="-0.30088" BBK_DIFF_A="-0.06062"/>
      <bbk:Obs TIME_PERIOD="2022-08-25" OBS_VALUE="-0.24026" BBK_DIFF_A="-0.07058"/>
      <bbk:Obs TIME_PERIOD="2022-08-24" OBS_VALUE="-0.16968" BBK_DIFF_A="-0.0868"/>
      <bbk:Obs TIME_PERIOD="2022-08-23" OBS_VALUE="-0.08288" BBK_DIFF_A="-0.07992"/>
      <bbk:Obs TIME_PERIOD="2022-08-22" OBS_VALUE="-0.00296" BBK_DIFF_A="0.04383"/>
      <bbk:Obs TIME_PERIOD="2022-08-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-08-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-08-19" OBS_VALUE="-0.04679" BBK_DIFF_A="0.02284"/>
      <bbk:Obs TIME_PERIOD="2022-08-18" OBS_VALUE="-0.06963" BBK_DIFF_A="0.02938"/>
      <bbk:Obs TIME_PERIOD="2022-08-17" OBS_VALUE="-0.09901" BBK_DIFF_A="0.11343"/>
      <bbk:Obs TIME_PERIOD="2022-08-16" OBS_VALUE="-0.21244" BBK_DIFF_A="0.00555"/>
      <bbk:Obs TIME_PERIOD="2022-08-15" OBS_VALUE="-0.21799" BBK_DIFF_A="0.05336"/>
      <bbk:Obs TIME_PERIOD="2022-08-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-08-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-08-12" OBS_VALUE="-0.27135" BBK_DIFF_A="0.00149"/>
      <bbk:Obs TIME_PERIOD="2022-08-11" OBS_VALUE="-0.27284" BBK_DIFF_A="0.03302"/>
      <bbk:Obs TIME_PERIOD="2022-08-10" OBS_VALUE="-0.30586" BBK_DIFF_A="-0.02056"/>
      <bbk:Obs TIME_PERIOD="2022-08-09" OBS_VALUE="-0.2853" BBK_DIFF_A="-0.03829"/>
      <bbk:Obs TIME_PERIOD="2022-08-08" OBS_VALUE="-0.24701" BBK_DIFF_A="0.07294"/>
      <bbk:Obs TIME_PERIOD="2022-08-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-08-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-08-05" OBS_VALUE="-0.31995" BBK_DIFF_A="-0.05369"/>
      <bbk:Obs TIME_PERIOD="2022-08-04" OBS_VALUE="-0.26626" BBK_DIFF_A="-0.01384"/>
      <bbk:Obs TIME_PERIOD="2022-08-03" OBS_VALUE="-0.25242" BBK_DIFF_A="0.27989"/>
      <bbk:Obs TIME_PERIOD="2022-08-02" OBS_VALUE="-0.53231" BBK_DIFF_A="-0.18855"/>
      <bbk:Obs TIME_PERIOD="2022-08-01" OBS_VALUE="-0.34376" BBK_DIFF_A="-0.02156"/>
      <bbk:Obs TIME_PERIOD="2022-07-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-07-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-07-29" OBS_VALUE="-0.3222" BBK_DIFF_A="-0.07303"/>
      <bbk:Obs TIME_PERIOD="2022-07-28" OBS_VALUE="-0.24917" BBK_DIFF_A="-0.03962"/>
      <bbk:Obs TIME_PERIOD="2022-07-27" OBS_VALUE="-0.20955" BBK_DIFF_A="-0.05935"/>
      <bbk:Obs TIME_PERIOD="2022-07-26" OBS_VALUE="-0.1502" BBK_DIFF_A="0.01844"/>
      <bbk:Obs TIME_PERIOD="2022-07-25" OBS_VALUE="-0.16864" BBK_DIFF_A="-0.07735"/>
      <bbk:Obs TIME_PERIOD="2022-07-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-07-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-07-22" OBS_VALUE="-0.09129" BBK_DIFF_A="0.14098"/>
      <bbk:Obs TIME_PERIOD="2022-07-21" OBS_VALUE="-0.23227" BBK_DIFF_A="-0.01176"/>
      <bbk:Obs TIME_PERIOD="2022-07-20" OBS_VALUE="-0.22051" BBK_DIFF_A="-0.01985"/>
      <bbk:Obs TIME_PERIOD="2022-07-19" OBS_VALUE="-0.20066" BBK_DIFF_A="0.04404"/>
      <bbk:Obs TIME_PERIOD="2022-07-18" OBS_VALUE="-0.2447" BBK_DIFF_A="-0.10497"/>
      <bbk:Obs TIME_PERIOD="2022-07-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-07-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-07-15" OBS_VALUE="-0.13973" BBK_DIFF_A="0.02027"/>
      <bbk:Obs TIME_PERIOD="2022-07-14" OBS_VALUE="-0.16" BBK_DIFF_A="0.09529"/>
      <bbk:Obs TIME_PERIOD="2022-07-13" OBS_VALUE="-0.25529" BBK_DIFF_A="-0.06269"/>
      <bbk:Obs TIME_PERIOD="2022-07-12" OBS_VALUE="-0.1926" BBK_DIFF_A="0.08646"/>
      <bbk:Obs TIME_PERIOD="2022-07-11" OBS_VALUE="-0.27906" BBK_DIFF_A="0.02354"/>
      <bbk:Obs TIME_PERIOD="2022-07-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-07-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-07-08" OBS_VALUE="-0.3026" BBK_DIFF_A="0.06095"/>
      <bbk:Obs TIME_PERIOD="2022-07-07" OBS_VALUE="-0.36355" BBK_DIFF_A="2.82255"/>
      <bbk:Obs TIME_PERIOD="2022-07-06" OBS_VALUE="-3.1861" BBK_DIFF_A="-2.343"/>
      <bbk:Obs TIME_PERIOD="2022-07-05" OBS_VALUE="-0.8431" BBK_DIFF_A="0.00535"/>
      <bbk:Obs TIME_PERIOD="2022-07-04" OBS_VALUE="-0.84845" BBK_DIFF_A="0.13712"/>
      <bbk:Obs TIME_PERIOD="2022-07-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-07-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-07-01" OBS_VALUE="-0.98557" BBK_DIFF_A="-0.06039"/>
      <bbk:Obs TIME_PERIOD="2022-06-30" OBS_VALUE="-0.92518" BBK_DIFF_A="-0.0249"/>
      <bbk:Obs TIME_PERIOD="2022-06-29" OBS_VALUE="-0.90028" BBK_DIFF_A="0.02781"/>
      <bbk:Obs TIME_PERIOD="2022-06-28" OBS_VALUE="-0.92809" BBK_DIFF_A="-0.12916"/>
      <bbk:Obs TIME_PERIOD="2022-06-27" OBS_VALUE="-0.79893" BBK_DIFF_A="0.09474"/>
      <bbk:Obs TIME_PERIOD="2022-06-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-06-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-06-24" OBS_VALUE="-0.89367" BBK_DIFF_A="-4.0E-4"/>
      <bbk:Obs TIME_PERIOD="2022-06-23" OBS_VALUE="-0.89327" BBK_DIFF_A="0.06073"/>
      <bbk:Obs TIME_PERIOD="2022-06-22" OBS_VALUE="-0.954" BBK_DIFF_A="-0.02025"/>
      <bbk:Obs TIME_PERIOD="2022-06-21" OBS_VALUE="-0.93375" BBK_DIFF_A="-0.06815"/>
      <bbk:Obs TIME_PERIOD="2022-06-20" OBS_VALUE="-0.8656" BBK_DIFF_A="0.07805"/>
      <bbk:Obs TIME_PERIOD="2022-06-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-06-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-06-17" OBS_VALUE="-0.94365" BBK_DIFF_A="-0.03639"/>
      <bbk:Obs TIME_PERIOD="2022-06-16" OBS_VALUE="-0.90726" BBK_DIFF_A="0.02742"/>
      <bbk:Obs TIME_PERIOD="2022-06-15" OBS_VALUE="-0.93468" BBK_DIFF_A="0.05858"/>
      <bbk:Obs TIME_PERIOD="2022-06-14" OBS_VALUE="-0.99326" BBK_DIFF_A="0.01097"/>
      <bbk:Obs TIME_PERIOD="2022-06-13" OBS_VALUE="-1.00423" BBK_DIFF_A="-0.06486"/>
      <bbk:Obs TIME_PERIOD="2022-06-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-06-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-06-10" OBS_VALUE="-0.93937" BBK_DIFF_A="-0.10088"/>
      <bbk:Obs TIME_PERIOD="2022-06-09" OBS_VALUE="-0.83849" BBK_DIFF_A="-0.00774"/>
      <bbk:Obs TIME_PERIOD="2022-06-08" OBS_VALUE="-0.83075" BBK_DIFF_A="-0.00877"/>
      <bbk:Obs TIME_PERIOD="2022-06-07" OBS_VALUE="-0.82198" BBK_DIFF_A="0.03955"/>
      <bbk:Obs TIME_PERIOD="2022-06-06" OBS_VALUE="-0.86153" BBK_DIFF_A="-0.02652"/>
      <bbk:Obs TIME_PERIOD="2022-06-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-06-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-06-03" OBS_VALUE="-0.83501" BBK_DIFF_A="-9.0E-4"/>
      <bbk:Obs TIME_PERIOD="2022-06-02" OBS_VALUE="-0.83411" BBK_DIFF_A="4.4E-4"/>
      <bbk:Obs TIME_PERIOD="2022-06-01" OBS_VALUE="-0.83455" BBK_DIFF_A="0.00109"/>
      <bbk:Obs TIME_PERIOD="2022-05-31" OBS_VALUE="-0.83564" BBK_DIFF_A="0.00617"/>
      <bbk:Obs TIME_PERIOD="2022-05-30" OBS_VALUE="-0.84181" BBK_DIFF_A="-0.00774"/>
      <bbk:Obs TIME_PERIOD="2022-05-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-05-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-05-27" OBS_VALUE="-0.83407" BBK_DIFF_A="-0.00841"/>
      <bbk:Obs TIME_PERIOD="2022-05-26" OBS_VALUE="-0.82566" BBK_DIFF_A="0.032"/>
      <bbk:Obs TIME_PERIOD="2022-05-25" OBS_VALUE="-0.85766" BBK_DIFF_A="0.01124"/>
      <bbk:Obs TIME_PERIOD="2022-05-24" OBS_VALUE="-0.8689" BBK_DIFF_A="-0.00244"/>
      <bbk:Obs TIME_PERIOD="2022-05-23" OBS_VALUE="-0.86646" BBK_DIFF_A="-0.01102"/>
      <bbk:Obs TIME_PERIOD="2022-05-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-05-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-05-20" OBS_VALUE="-0.85544" BBK_DIFF_A="0.02238"/>
      <bbk:Obs TIME_PERIOD="2022-05-19" OBS_VALUE="-0.87782" BBK_DIFF_A="0.00584"/>
      <bbk:Obs TIME_PERIOD="2022-05-18" OBS_VALUE="-0.88366" BBK_DIFF_A="-0.03476"/>
      <bbk:Obs TIME_PERIOD="2022-05-17" OBS_VALUE="-0.8489" BBK_DIFF_A="-0.01794"/>
      <bbk:Obs TIME_PERIOD="2022-05-16" OBS_VALUE="-0.83096" BBK_DIFF_A="-0.01495"/>
      <bbk:Obs TIME_PERIOD="2022-05-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-05-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-05-13" OBS_VALUE="-0.81601" BBK_DIFF_A="-0.01011"/>
      <bbk:Obs TIME_PERIOD="2022-05-12" OBS_VALUE="-0.8059" BBK_DIFF_A="0.04231"/>
      <bbk:Obs TIME_PERIOD="2022-05-11" OBS_VALUE="-0.84821" BBK_DIFF_A="0.54376"/>
      <bbk:Obs TIME_PERIOD="2022-05-10" OBS_VALUE="-1.39197" BBK_DIFF_A="0.79228"/>
      <bbk:Obs TIME_PERIOD="2022-05-09" OBS_VALUE="-2.18425" BBK_DIFF_A="-0.20173"/>
      <bbk:Obs TIME_PERIOD="2022-05-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-05-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-05-06" OBS_VALUE="-1.98252" BBK_DIFF_A="-0.00289"/>
      <bbk:Obs TIME_PERIOD="2022-05-05" OBS_VALUE="-1.97963" BBK_DIFF_A="-0.08845"/>
      <bbk:Obs TIME_PERIOD="2022-05-04" OBS_VALUE="-1.89118" BBK_DIFF_A="-0.00359"/>
      <bbk:Obs TIME_PERIOD="2022-05-03" OBS_VALUE="-1.88759" BBK_DIFF_A="0.3887"/>
      <bbk:Obs TIME_PERIOD="2022-05-02" OBS_VALUE="-2.27629" BBK_DIFF_A="0.28175"/>
      <bbk:Obs TIME_PERIOD="2022-05-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-04-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-04-29" OBS_VALUE="-2.55804" BBK_DIFF_A="-0.23803"/>
      <bbk:Obs TIME_PERIOD="2022-04-28" OBS_VALUE="-2.32001" BBK_DIFF_A="0.09577"/>
      <bbk:Obs TIME_PERIOD="2022-04-27" OBS_VALUE="-2.41578" BBK_DIFF_A="-0.79735"/>
      <bbk:Obs TIME_PERIOD="2022-04-26" OBS_VALUE="-1.61843" BBK_DIFF_A="-0.17853"/>
      <bbk:Obs TIME_PERIOD="2022-04-25" OBS_VALUE="-1.4399" BBK_DIFF_A="0.00768"/>
      <bbk:Obs TIME_PERIOD="2022-04-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-04-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-04-22" OBS_VALUE="-1.44758" BBK_DIFF_A="0.11029"/>
      <bbk:Obs TIME_PERIOD="2022-04-21" OBS_VALUE="-1.55787" BBK_DIFF_A="0.14144"/>
      <bbk:Obs TIME_PERIOD="2022-04-20" OBS_VALUE="-1.69931" BBK_DIFF_A="-0.17883"/>
      <bbk:Obs TIME_PERIOD="2022-04-19" OBS_VALUE="-1.52048" BBK_DIFF_A="-0.48076"/>
      <bbk:Obs TIME_PERIOD="2022-04-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-04-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-04-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-04-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-04-14" OBS_VALUE="-1.03972" BBK_DIFF_A="2.60311"/>
      <bbk:Obs TIME_PERIOD="2022-04-13" OBS_VALUE="-3.64283" BBK_DIFF_A="1.48376"/>
      <bbk:Obs TIME_PERIOD="2022-04-12" OBS_VALUE="-5.12659" BBK_DIFF_A="-3.85851"/>
      <bbk:Obs TIME_PERIOD="2022-04-11" OBS_VALUE="-1.26808" BBK_DIFF_A="0.06144"/>
      <bbk:Obs TIME_PERIOD="2022-04-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-04-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-04-08" OBS_VALUE="-1.32952" BBK_DIFF_A="-0.00408"/>
      <bbk:Obs TIME_PERIOD="2022-04-07" OBS_VALUE="-1.32544" BBK_DIFF_A="3.13169"/>
      <bbk:Obs TIME_PERIOD="2022-04-06" OBS_VALUE="-4.45713" BBK_DIFF_A="-0.24663"/>
      <bbk:Obs TIME_PERIOD="2022-04-05" OBS_VALUE="-4.2105" BBK_DIFF_A="-2.99951"/>
      <bbk:Obs TIME_PERIOD="2022-04-04" OBS_VALUE="-1.21099" BBK_DIFF_A="-0.16745"/>
      <bbk:Obs TIME_PERIOD="2022-04-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-04-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-04-01" OBS_VALUE="-1.04354" BBK_DIFF_A="-0.11149"/>
      <bbk:Obs TIME_PERIOD="2022-03-31" OBS_VALUE="-0.93205" BBK_DIFF_A="0.31654"/>
      <bbk:Obs TIME_PERIOD="2022-03-30" OBS_VALUE="-1.24859" BBK_DIFF_A="-0.11761"/>
      <bbk:Obs TIME_PERIOD="2022-03-29" OBS_VALUE="-1.13098" BBK_DIFF_A="-0.0649"/>
      <bbk:Obs TIME_PERIOD="2022-03-28" OBS_VALUE="-1.06608" BBK_DIFF_A="0.16636"/>
      <bbk:Obs TIME_PERIOD="2022-03-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-03-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-03-25" OBS_VALUE="-1.23244" BBK_DIFF_A="0.04779"/>
      <bbk:Obs TIME_PERIOD="2022-03-24" OBS_VALUE="-1.28023" BBK_DIFF_A="-0.00153"/>
      <bbk:Obs TIME_PERIOD="2022-03-23" OBS_VALUE="-1.2787" BBK_DIFF_A="0.01656"/>
      <bbk:Obs TIME_PERIOD="2022-03-22" OBS_VALUE="-1.29526" BBK_DIFF_A="-0.01733"/>
      <bbk:Obs TIME_PERIOD="2022-03-21" OBS_VALUE="-1.27793" BBK_DIFF_A="-0.04016"/>
      <bbk:Obs TIME_PERIOD="2022-03-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-03-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-03-18" OBS_VALUE="-1.23777" BBK_DIFF_A="-0.03133"/>
      <bbk:Obs TIME_PERIOD="2022-03-17" OBS_VALUE="-1.20644" BBK_DIFF_A="0.06027"/>
      <bbk:Obs TIME_PERIOD="2022-03-16" OBS_VALUE="-1.26671" BBK_DIFF_A="-0.01145"/>
      <bbk:Obs TIME_PERIOD="2022-03-15" OBS_VALUE="-1.25526" BBK_DIFF_A="-0.05169"/>
      <bbk:Obs TIME_PERIOD="2022-03-14" OBS_VALUE="-1.20357" BBK_DIFF_A="0.51456"/>
      <bbk:Obs TIME_PERIOD="2022-03-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-03-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-03-11" OBS_VALUE="-1.71813" BBK_DIFF_A="-0.00127"/>
      <bbk:Obs TIME_PERIOD="2022-03-10" OBS_VALUE="-1.71686" BBK_DIFF_A="0.24477"/>
      <bbk:Obs TIME_PERIOD="2022-03-09" OBS_VALUE="-1.96163" BBK_DIFF_A="-0.84157"/>
      <bbk:Obs TIME_PERIOD="2022-03-08" OBS_VALUE="-1.12006" BBK_DIFF_A="-0.07696"/>
      <bbk:Obs TIME_PERIOD="2022-03-07" OBS_VALUE="-1.0431" BBK_DIFF_A="-0.00986"/>
      <bbk:Obs TIME_PERIOD="2022-03-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-03-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-03-04" OBS_VALUE="-1.03324" BBK_DIFF_A="0.08199"/>
      <bbk:Obs TIME_PERIOD="2022-03-03" OBS_VALUE="-1.11523" BBK_DIFF_A="-0.06735"/>
      <bbk:Obs TIME_PERIOD="2022-03-02" OBS_VALUE="-1.04788" BBK_DIFF_A="0.06021"/>
      <bbk:Obs TIME_PERIOD="2022-03-01" OBS_VALUE="-1.10809" BBK_DIFF_A="0.16067"/>
      <bbk:Obs TIME_PERIOD="2022-02-28" OBS_VALUE="-1.26876" BBK_DIFF_A="-0.03489"/>
      <bbk:Obs TIME_PERIOD="2022-02-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-02-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-02-25" OBS_VALUE="-1.23387" BBK_DIFF_A="-0.08184"/>
      <bbk:Obs TIME_PERIOD="2022-02-24" OBS_VALUE="-1.15203" BBK_DIFF_A="0.09148"/>
      <bbk:Obs TIME_PERIOD="2022-02-23" OBS_VALUE="-1.24351" BBK_DIFF_A="-0.06195"/>
      <bbk:Obs TIME_PERIOD="2022-02-22" OBS_VALUE="-1.18156" BBK_DIFF_A="0.02454"/>
      <bbk:Obs TIME_PERIOD="2022-02-21" OBS_VALUE="-1.2061" BBK_DIFF_A="-0.03439"/>
      <bbk:Obs TIME_PERIOD="2022-02-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-02-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-02-18" OBS_VALUE="-1.17171" BBK_DIFF_A="0.07812"/>
      <bbk:Obs TIME_PERIOD="2022-02-17" OBS_VALUE="-1.24983" BBK_DIFF_A="-0.04443"/>
      <bbk:Obs TIME_PERIOD="2022-02-16" OBS_VALUE="-1.2054" BBK_DIFF_A="-0.04194"/>
      <bbk:Obs TIME_PERIOD="2022-02-15" OBS_VALUE="-1.16346" BBK_DIFF_A="-0.13123"/>
      <bbk:Obs TIME_PERIOD="2022-02-14" OBS_VALUE="-1.03223" BBK_DIFF_A="0.28533"/>
      <bbk:Obs TIME_PERIOD="2022-02-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-02-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-02-11" OBS_VALUE="-1.31756" BBK_DIFF_A="-0.02683"/>
      <bbk:Obs TIME_PERIOD="2022-02-10" OBS_VALUE="-1.29073" BBK_DIFF_A="-0.05885"/>
      <bbk:Obs TIME_PERIOD="2022-02-09" OBS_VALUE="-1.23188" BBK_DIFF_A="-0.088"/>
      <bbk:Obs TIME_PERIOD="2022-02-08" OBS_VALUE="-1.14388" BBK_DIFF_A="-0.00281"/>
      <bbk:Obs TIME_PERIOD="2022-02-07" OBS_VALUE="-1.14107" BBK_DIFF_A="-0.01272"/>
      <bbk:Obs TIME_PERIOD="2022-02-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-02-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-02-04" OBS_VALUE="-1.12835" BBK_DIFF_A="-0.13771"/>
      <bbk:Obs TIME_PERIOD="2022-02-03" OBS_VALUE="-0.99064" BBK_DIFF_A="0.04503"/>
      <bbk:Obs TIME_PERIOD="2022-02-02" OBS_VALUE="-1.03567" BBK_DIFF_A="-0.04984"/>
      <bbk:Obs TIME_PERIOD="2022-02-01" OBS_VALUE="-0.98583" BBK_DIFF_A="0.03391"/>
      <bbk:Obs TIME_PERIOD="2022-01-31" OBS_VALUE="-1.01974" BBK_DIFF_A="0.24756"/>
      <bbk:Obs TIME_PERIOD="2022-01-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-01-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-01-28" OBS_VALUE="-1.2673" BBK_DIFF_A="0.2192"/>
      <bbk:Obs TIME_PERIOD="2022-01-27" OBS_VALUE="-1.4865" BBK_DIFF_A="-0.01186"/>
      <bbk:Obs TIME_PERIOD="2022-01-26" OBS_VALUE="-1.47464" BBK_DIFF_A="0.8898"/>
      <bbk:Obs TIME_PERIOD="2022-01-25" OBS_VALUE="-2.36444" BBK_DIFF_A="-0.66619"/>
      <bbk:Obs TIME_PERIOD="2022-01-24" OBS_VALUE="-1.69825" BBK_DIFF_A="0.14192"/>
      <bbk:Obs TIME_PERIOD="2022-01-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-01-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-01-21" OBS_VALUE="-1.84017" BBK_DIFF_A="1.06089"/>
      <bbk:Obs TIME_PERIOD="2022-01-20" OBS_VALUE="-2.90106" BBK_DIFF_A="0.09662"/>
      <bbk:Obs TIME_PERIOD="2022-01-19" OBS_VALUE="-2.99768" BBK_DIFF_A="-0.03024"/>
      <bbk:Obs TIME_PERIOD="2022-01-18" OBS_VALUE="-2.96744" BBK_DIFF_A="-0.03655"/>
      <bbk:Obs TIME_PERIOD="2022-01-17" OBS_VALUE="-2.93089" BBK_DIFF_A="-0.20777"/>
      <bbk:Obs TIME_PERIOD="2022-01-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-01-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-01-14" OBS_VALUE="-2.72312" BBK_DIFF_A="0.11228"/>
      <bbk:Obs TIME_PERIOD="2022-01-13" OBS_VALUE="-2.8354" BBK_DIFF_A="-1.37405"/>
      <bbk:Obs TIME_PERIOD="2022-01-12" OBS_VALUE="-1.46135" BBK_DIFF_A="-0.02054"/>
      <bbk:Obs TIME_PERIOD="2022-01-11" OBS_VALUE="-1.44081" BBK_DIFF_A="1.49332"/>
      <bbk:Obs TIME_PERIOD="2022-01-10" OBS_VALUE="-2.93413" BBK_DIFF_A="-0.01995"/>
      <bbk:Obs TIME_PERIOD="2022-01-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-01-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-01-07" OBS_VALUE="-2.91418" BBK_DIFF_A="-1.40294"/>
      <bbk:Obs TIME_PERIOD="2022-01-06" OBS_VALUE="-1.51124" BBK_DIFF_A="-0.40115"/>
      <bbk:Obs TIME_PERIOD="2022-01-05" OBS_VALUE="-1.11009" BBK_DIFF_A="0.00938"/>
      <bbk:Obs TIME_PERIOD="2022-01-04" OBS_VALUE="-1.11947" BBK_DIFF_A="-0.0216"/>
      <bbk:Obs TIME_PERIOD="2022-01-03" OBS_VALUE="-1.09787" BBK_DIFF_A="0.01053"/>
      <bbk:Obs TIME_PERIOD="2022-01-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2022-01-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-12-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-12-30" OBS_VALUE="-1.1084" BBK_DIFF_A="0.03189"/>
      <bbk:Obs TIME_PERIOD="2021-12-29" OBS_VALUE="-1.14029" BBK_DIFF_A="-0.07759"/>
      <bbk:Obs TIME_PERIOD="2021-12-28" OBS_VALUE="-1.0627" BBK_DIFF_A="0.01345"/>
      <bbk:Obs TIME_PERIOD="2021-12-27" OBS_VALUE="-1.07615" BBK_DIFF_A="0.04921"/>
      <bbk:Obs TIME_PERIOD="2021-12-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-12-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-12-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-12-23" OBS_VALUE="-1.12536" BBK_DIFF_A="0.07364"/>
      <bbk:Obs TIME_PERIOD="2021-12-22" OBS_VALUE="-1.199" BBK_DIFF_A="-0.05874"/>
      <bbk:Obs TIME_PERIOD="2021-12-21" OBS_VALUE="-1.14026" BBK_DIFF_A="-0.09462"/>
      <bbk:Obs TIME_PERIOD="2021-12-20" OBS_VALUE="-1.04564" BBK_DIFF_A="-0.00599"/>
      <bbk:Obs TIME_PERIOD="2021-12-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-12-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-12-17" OBS_VALUE="-1.03965" BBK_DIFF_A="0.01853"/>
      <bbk:Obs TIME_PERIOD="2021-12-16" OBS_VALUE="-1.05818" BBK_DIFF_A="0.03069"/>
      <bbk:Obs TIME_PERIOD="2021-12-15" OBS_VALUE="-1.08887" BBK_DIFF_A="-0.01057"/>
      <bbk:Obs TIME_PERIOD="2021-12-14" OBS_VALUE="-1.0783" BBK_DIFF_A="0.00732"/>
      <bbk:Obs TIME_PERIOD="2021-12-13" OBS_VALUE="-1.08562" BBK_DIFF_A="0.066"/>
      <bbk:Obs TIME_PERIOD="2021-12-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-12-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-12-10" OBS_VALUE="-1.15162" BBK_DIFF_A="-0.04554"/>
      <bbk:Obs TIME_PERIOD="2021-12-09" OBS_VALUE="-1.10608" BBK_DIFF_A="-0.02103"/>
      <bbk:Obs TIME_PERIOD="2021-12-08" OBS_VALUE="-1.08505" BBK_DIFF_A="-0.04916"/>
      <bbk:Obs TIME_PERIOD="2021-12-07" OBS_VALUE="-1.03589" BBK_DIFF_A="0.08618"/>
      <bbk:Obs TIME_PERIOD="2021-12-06" OBS_VALUE="-1.12207" BBK_DIFF_A="0.02048"/>
      <bbk:Obs TIME_PERIOD="2021-12-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-12-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-12-03" OBS_VALUE="-1.14255" BBK_DIFF_A="0.08605"/>
      <bbk:Obs TIME_PERIOD="2021-12-02" OBS_VALUE="-1.2286" BBK_DIFF_A="-9.5E-4"/>
      <bbk:Obs TIME_PERIOD="2021-12-01" OBS_VALUE="-1.22765" BBK_DIFF_A="0.00441"/>
      <bbk:Obs TIME_PERIOD="2021-11-30" OBS_VALUE="-1.23206" BBK_DIFF_A="0.17193"/>
      <bbk:Obs TIME_PERIOD="2021-11-29" OBS_VALUE="-1.40399" BBK_DIFF_A="0.0018"/>
      <bbk:Obs TIME_PERIOD="2021-11-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-11-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-11-26" OBS_VALUE="-1.40579" BBK_DIFF_A="0.12886"/>
      <bbk:Obs TIME_PERIOD="2021-11-25" OBS_VALUE="-1.53465" BBK_DIFF_A="0.15802"/>
      <bbk:Obs TIME_PERIOD="2021-11-24" OBS_VALUE="-1.69267" BBK_DIFF_A="-0.05711"/>
      <bbk:Obs TIME_PERIOD="2021-11-23" OBS_VALUE="-1.63556" BBK_DIFF_A="-0.04342"/>
      <bbk:Obs TIME_PERIOD="2021-11-22" OBS_VALUE="-1.59214" BBK_DIFF_A="-0.09029"/>
      <bbk:Obs TIME_PERIOD="2021-11-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-11-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-11-19" OBS_VALUE="-1.50185" BBK_DIFF_A="0.01891"/>
      <bbk:Obs TIME_PERIOD="2021-11-18" OBS_VALUE="-1.52076" BBK_DIFF_A="0.03421"/>
      <bbk:Obs TIME_PERIOD="2021-11-17" OBS_VALUE="-1.55497" BBK_DIFF_A="-0.06497"/>
      <bbk:Obs TIME_PERIOD="2021-11-16" OBS_VALUE="-1.49" BBK_DIFF_A="-0.09706"/>
      <bbk:Obs TIME_PERIOD="2021-11-15" OBS_VALUE="-1.39294" BBK_DIFF_A="-3.0E-4"/>
      <bbk:Obs TIME_PERIOD="2021-11-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-11-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-11-12" OBS_VALUE="-1.39264" BBK_DIFF_A="-0.08123"/>
      <bbk:Obs TIME_PERIOD="2021-11-11" OBS_VALUE="-1.31141" BBK_DIFF_A="-0.11743"/>
      <bbk:Obs TIME_PERIOD="2021-11-10" OBS_VALUE="-1.19398" BBK_DIFF_A="0.07077"/>
      <bbk:Obs TIME_PERIOD="2021-11-09" OBS_VALUE="-1.26475" BBK_DIFF_A="-0.07918"/>
      <bbk:Obs TIME_PERIOD="2021-11-08" OBS_VALUE="-1.18557" BBK_DIFF_A="-0.03566"/>
      <bbk:Obs TIME_PERIOD="2021-11-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-11-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-11-05" OBS_VALUE="-1.14991" BBK_DIFF_A="0.04808"/>
      <bbk:Obs TIME_PERIOD="2021-11-04" OBS_VALUE="-1.19799" BBK_DIFF_A="-0.01563"/>
      <bbk:Obs TIME_PERIOD="2021-11-03" OBS_VALUE="-1.18236" BBK_DIFF_A="-0.05186"/>
      <bbk:Obs TIME_PERIOD="2021-11-02" OBS_VALUE="-1.1305" BBK_DIFF_A="-0.03535"/>
      <bbk:Obs TIME_PERIOD="2021-11-01" OBS_VALUE="-1.09515" BBK_DIFF_A="-0.0113"/>
      <bbk:Obs TIME_PERIOD="2021-10-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-10-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-10-29" OBS_VALUE="-1.08385" BBK_DIFF_A="-0.03206"/>
      <bbk:Obs TIME_PERIOD="2021-10-28" OBS_VALUE="-1.05179" BBK_DIFF_A="0.22433"/>
      <bbk:Obs TIME_PERIOD="2021-10-27" OBS_VALUE="-1.27612" BBK_DIFF_A="0.00944"/>
      <bbk:Obs TIME_PERIOD="2021-10-26" OBS_VALUE="-1.28556" BBK_DIFF_A="-0.05476"/>
      <bbk:Obs TIME_PERIOD="2021-10-25" OBS_VALUE="-1.2308" BBK_DIFF_A="-0.01603"/>
      <bbk:Obs TIME_PERIOD="2021-10-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-10-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-10-22" OBS_VALUE="-1.21477" BBK_DIFF_A="0.01485"/>
      <bbk:Obs TIME_PERIOD="2021-10-21" OBS_VALUE="-1.22962" BBK_DIFF_A="-0.01462"/>
      <bbk:Obs TIME_PERIOD="2021-10-20" OBS_VALUE="-1.215" BBK_DIFF_A="0.00792"/>
      <bbk:Obs TIME_PERIOD="2021-10-19" OBS_VALUE="-1.22292" BBK_DIFF_A="0.00504"/>
      <bbk:Obs TIME_PERIOD="2021-10-18" OBS_VALUE="-1.22796" BBK_DIFF_A="-0.13956"/>
      <bbk:Obs TIME_PERIOD="2021-10-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-10-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-10-15" OBS_VALUE="-1.0884" BBK_DIFF_A="-0.00433"/>
      <bbk:Obs TIME_PERIOD="2021-10-14" OBS_VALUE="-1.08407" BBK_DIFF_A="0.04775"/>
      <bbk:Obs TIME_PERIOD="2021-10-13" OBS_VALUE="-1.13182" BBK_DIFF_A="0.01844"/>
      <bbk:Obs TIME_PERIOD="2021-10-12" OBS_VALUE="-1.15026" BBK_DIFF_A="-0.06696"/>
      <bbk:Obs TIME_PERIOD="2021-10-11" OBS_VALUE="-1.0833" BBK_DIFF_A="0.28168"/>
      <bbk:Obs TIME_PERIOD="2021-10-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-10-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-10-08" OBS_VALUE="-1.36498" BBK_DIFF_A="-0.01171"/>
      <bbk:Obs TIME_PERIOD="2021-10-07" OBS_VALUE="-1.35327" BBK_DIFF_A="-0.03458"/>
      <bbk:Obs TIME_PERIOD="2021-10-06" OBS_VALUE="-1.31869" BBK_DIFF_A="-0.03338"/>
      <bbk:Obs TIME_PERIOD="2021-10-05" OBS_VALUE="-1.28531" BBK_DIFF_A="-0.2553"/>
      <bbk:Obs TIME_PERIOD="2021-10-04" OBS_VALUE="-1.03001" BBK_DIFF_A="-0.02145"/>
      <bbk:Obs TIME_PERIOD="2021-10-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-10-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-10-01" OBS_VALUE="-1.00856" BBK_DIFF_A="0.0266"/>
      <bbk:Obs TIME_PERIOD="2021-09-30" OBS_VALUE="-1.03516" BBK_DIFF_A="0.01017"/>
      <bbk:Obs TIME_PERIOD="2021-09-29" OBS_VALUE="-1.04533" BBK_DIFF_A="0.02627"/>
      <bbk:Obs TIME_PERIOD="2021-09-28" OBS_VALUE="-1.0716" BBK_DIFF_A="0.00304"/>
      <bbk:Obs TIME_PERIOD="2021-09-27" OBS_VALUE="-1.07464" BBK_DIFF_A="0.17057"/>
      <bbk:Obs TIME_PERIOD="2021-09-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-09-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-09-24" OBS_VALUE="-1.24521" BBK_DIFF_A="-0.09779"/>
      <bbk:Obs TIME_PERIOD="2021-09-23" OBS_VALUE="-1.14742" BBK_DIFF_A="0.01058"/>
      <bbk:Obs TIME_PERIOD="2021-09-22" OBS_VALUE="-1.158" BBK_DIFF_A="0.01192"/>
      <bbk:Obs TIME_PERIOD="2021-09-21" OBS_VALUE="-1.16992" BBK_DIFF_A="-0.00604"/>
      <bbk:Obs TIME_PERIOD="2021-09-20" OBS_VALUE="-1.16388" BBK_DIFF_A="0.01922"/>
      <bbk:Obs TIME_PERIOD="2021-09-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-09-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-09-17" OBS_VALUE="-1.1831" BBK_DIFF_A="0.01063"/>
      <bbk:Obs TIME_PERIOD="2021-09-16" OBS_VALUE="-1.19373" BBK_DIFF_A="-0.04212"/>
      <bbk:Obs TIME_PERIOD="2021-09-15" OBS_VALUE="-1.15161" BBK_DIFF_A="0.02735"/>
      <bbk:Obs TIME_PERIOD="2021-09-14" OBS_VALUE="-1.17896" BBK_DIFF_A="-0.02502"/>
      <bbk:Obs TIME_PERIOD="2021-09-13" OBS_VALUE="-1.15394" BBK_DIFF_A="-0.01395"/>
      <bbk:Obs TIME_PERIOD="2021-09-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-09-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-09-10" OBS_VALUE="-1.13999" BBK_DIFF_A="0.00784"/>
      <bbk:Obs TIME_PERIOD="2021-09-09" OBS_VALUE="-1.14783" BBK_DIFF_A="-0.01167"/>
      <bbk:Obs TIME_PERIOD="2021-09-08" OBS_VALUE="-1.13616" BBK_DIFF_A="0.0246"/>
      <bbk:Obs TIME_PERIOD="2021-09-07" OBS_VALUE="-1.16076" BBK_DIFF_A="-0.03324"/>
      <bbk:Obs TIME_PERIOD="2021-09-06" OBS_VALUE="-1.12752" BBK_DIFF_A="-0.4865"/>
      <bbk:Obs TIME_PERIOD="2021-09-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-09-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-09-03" OBS_VALUE="-0.64102" BBK_DIFF_A="-0.0252"/>
      <bbk:Obs TIME_PERIOD="2021-09-02" OBS_VALUE="-0.61582" BBK_DIFF_A="0.46964"/>
      <bbk:Obs TIME_PERIOD="2021-09-01" OBS_VALUE="-1.08546" BBK_DIFF_A="-0.06893"/>
      <bbk:Obs TIME_PERIOD="2021-08-31" OBS_VALUE="-1.01653" BBK_DIFF_A="-0.01189"/>
      <bbk:Obs TIME_PERIOD="2021-08-30" OBS_VALUE="-1.00464" BBK_DIFF_A="0.01557"/>
      <bbk:Obs TIME_PERIOD="2021-08-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-08-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-08-27" OBS_VALUE="-1.02021" BBK_DIFF_A="0.00183"/>
      <bbk:Obs TIME_PERIOD="2021-08-26" OBS_VALUE="-1.02204" BBK_DIFF_A="-0.06505"/>
      <bbk:Obs TIME_PERIOD="2021-08-25" OBS_VALUE="-0.95699" BBK_DIFF_A="-0.03012"/>
      <bbk:Obs TIME_PERIOD="2021-08-24" OBS_VALUE="-0.92687" BBK_DIFF_A="0.02141"/>
      <bbk:Obs TIME_PERIOD="2021-08-23" OBS_VALUE="-0.94828" BBK_DIFF_A="-0.04585"/>
      <bbk:Obs TIME_PERIOD="2021-08-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-08-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-08-20" OBS_VALUE="-0.90243" BBK_DIFF_A="-0.00205"/>
      <bbk:Obs TIME_PERIOD="2021-08-19" OBS_VALUE="-0.90038" BBK_DIFF_A="-0.27393"/>
      <bbk:Obs TIME_PERIOD="2021-08-18" OBS_VALUE="-0.62645" BBK_DIFF_A="-0.00681"/>
      <bbk:Obs TIME_PERIOD="2021-08-17" OBS_VALUE="-0.61964" BBK_DIFF_A="-0.00274"/>
      <bbk:Obs TIME_PERIOD="2021-08-16" OBS_VALUE="-0.6169" BBK_DIFF_A="2.6E-4"/>
      <bbk:Obs TIME_PERIOD="2021-08-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-08-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-08-13" OBS_VALUE="-0.61716" BBK_DIFF_A="0.0022"/>
      <bbk:Obs TIME_PERIOD="2021-08-12" OBS_VALUE="-0.61936" BBK_DIFF_A="-0.01096"/>
      <bbk:Obs TIME_PERIOD="2021-08-11" OBS_VALUE="-0.6084" BBK_DIFF_A="-0.00404"/>
      <bbk:Obs TIME_PERIOD="2021-08-10" OBS_VALUE="-0.60436" BBK_DIFF_A="0.00282"/>
      <bbk:Obs TIME_PERIOD="2021-08-09" OBS_VALUE="-0.60718" BBK_DIFF_A="0.26348"/>
      <bbk:Obs TIME_PERIOD="2021-08-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-08-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-08-06" OBS_VALUE="-0.87066" BBK_DIFF_A="0.00362"/>
      <bbk:Obs TIME_PERIOD="2021-08-05" OBS_VALUE="-0.87428" BBK_DIFF_A="0.03762"/>
      <bbk:Obs TIME_PERIOD="2021-08-04" OBS_VALUE="-0.9119" BBK_DIFF_A="0.05169"/>
      <bbk:Obs TIME_PERIOD="2021-08-03" OBS_VALUE="-0.96359" BBK_DIFF_A="0.03803"/>
      <bbk:Obs TIME_PERIOD="2021-08-02" OBS_VALUE="-1.00162" BBK_DIFF_A="0.01739"/>
      <bbk:Obs TIME_PERIOD="2021-08-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-07-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-07-30" OBS_VALUE="-1.01901" BBK_DIFF_A="0.01173"/>
      <bbk:Obs TIME_PERIOD="2021-07-29" OBS_VALUE="-1.03074" BBK_DIFF_A="-0.00802"/>
      <bbk:Obs TIME_PERIOD="2021-07-28" OBS_VALUE="-1.02272" BBK_DIFF_A="-0.00862"/>
      <bbk:Obs TIME_PERIOD="2021-07-27" OBS_VALUE="-1.0141" BBK_DIFF_A="0.01062"/>
      <bbk:Obs TIME_PERIOD="2021-07-26" OBS_VALUE="-1.02472" BBK_DIFF_A="0.02733"/>
      <bbk:Obs TIME_PERIOD="2021-07-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-07-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-07-23" OBS_VALUE="-1.05205" BBK_DIFF_A="-0.0013"/>
      <bbk:Obs TIME_PERIOD="2021-07-22" OBS_VALUE="-1.05075" BBK_DIFF_A="-0.0243"/>
      <bbk:Obs TIME_PERIOD="2021-07-21" OBS_VALUE="-1.02645" BBK_DIFF_A="-0.01509"/>
      <bbk:Obs TIME_PERIOD="2021-07-20" OBS_VALUE="-1.01136" BBK_DIFF_A="0.06124"/>
      <bbk:Obs TIME_PERIOD="2021-07-19" OBS_VALUE="-1.0726" BBK_DIFF_A="0.05094"/>
      <bbk:Obs TIME_PERIOD="2021-07-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-07-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-07-16" OBS_VALUE="-1.12354" BBK_DIFF_A="0.01668"/>
      <bbk:Obs TIME_PERIOD="2021-07-15" OBS_VALUE="-1.14022" BBK_DIFF_A="0.0579"/>
      <bbk:Obs TIME_PERIOD="2021-07-14" OBS_VALUE="-1.19812" BBK_DIFF_A="-3.8E-4"/>
      <bbk:Obs TIME_PERIOD="2021-07-13" OBS_VALUE="-1.19774" BBK_DIFF_A="-0.02697"/>
      <bbk:Obs TIME_PERIOD="2021-07-12" OBS_VALUE="-1.17077" BBK_DIFF_A="-0.01556"/>
      <bbk:Obs TIME_PERIOD="2021-07-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-07-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-07-09" OBS_VALUE="-1.15521" BBK_DIFF_A="-0.02344"/>
      <bbk:Obs TIME_PERIOD="2021-07-08" OBS_VALUE="-1.13177" BBK_DIFF_A="0.0658"/>
      <bbk:Obs TIME_PERIOD="2021-07-07" OBS_VALUE="-1.19757" BBK_DIFF_A="0.08116"/>
      <bbk:Obs TIME_PERIOD="2021-07-06" OBS_VALUE="-1.27873" BBK_DIFF_A="0.01553"/>
      <bbk:Obs TIME_PERIOD="2021-07-05" OBS_VALUE="-1.29426" BBK_DIFF_A="-0.02169"/>
      <bbk:Obs TIME_PERIOD="2021-07-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-07-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-07-02" OBS_VALUE="-1.27257" BBK_DIFF_A="0.02213"/>
      <bbk:Obs TIME_PERIOD="2021-07-01" OBS_VALUE="-1.2947" BBK_DIFF_A="0.00216"/>
      <bbk:Obs TIME_PERIOD="2021-06-30" OBS_VALUE="-1.29686" BBK_DIFF_A="0.00451"/>
      <bbk:Obs TIME_PERIOD="2021-06-29" OBS_VALUE="-1.30137" BBK_DIFF_A="-0.39736"/>
      <bbk:Obs TIME_PERIOD="2021-06-28" OBS_VALUE="-0.90401" BBK_DIFF_A="-0.03313"/>
      <bbk:Obs TIME_PERIOD="2021-06-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-06-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-06-25" OBS_VALUE="-0.87088" BBK_DIFF_A="-0.05916"/>
      <bbk:Obs TIME_PERIOD="2021-06-24" OBS_VALUE="-0.81172" BBK_DIFF_A="0.01324"/>
      <bbk:Obs TIME_PERIOD="2021-06-23" OBS_VALUE="-0.82496" BBK_DIFF_A="-0.03522"/>
      <bbk:Obs TIME_PERIOD="2021-06-22" OBS_VALUE="-0.78974" BBK_DIFF_A="-0.11076"/>
      <bbk:Obs TIME_PERIOD="2021-06-21" OBS_VALUE="-0.67898" BBK_DIFF_A="-0.02084"/>
      <bbk:Obs TIME_PERIOD="2021-06-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-06-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-06-18" OBS_VALUE="-0.65814" BBK_DIFF_A="0.05705"/>
      <bbk:Obs TIME_PERIOD="2021-06-17" OBS_VALUE="-0.71519" BBK_DIFF_A="-0.05788"/>
      <bbk:Obs TIME_PERIOD="2021-06-16" OBS_VALUE="-0.65731" BBK_DIFF_A="-0.00192"/>
      <bbk:Obs TIME_PERIOD="2021-06-15" OBS_VALUE="-0.65539" BBK_DIFF_A="0.03852"/>
      <bbk:Obs TIME_PERIOD="2021-06-14" OBS_VALUE="-0.69391" BBK_DIFF_A="-0.06394"/>
      <bbk:Obs TIME_PERIOD="2021-06-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-06-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-06-11" OBS_VALUE="-0.62997" BBK_DIFF_A="0.6881"/>
      <bbk:Obs TIME_PERIOD="2021-06-10" OBS_VALUE="-1.31807" BBK_DIFF_A="-0.0016"/>
      <bbk:Obs TIME_PERIOD="2021-06-09" OBS_VALUE="-1.31647" BBK_DIFF_A="0.00732"/>
      <bbk:Obs TIME_PERIOD="2021-06-08" OBS_VALUE="-1.32379" BBK_DIFF_A="0.03309"/>
      <bbk:Obs TIME_PERIOD="2021-06-07" OBS_VALUE="-1.35688" BBK_DIFF_A="0.00324"/>
      <bbk:Obs TIME_PERIOD="2021-06-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-06-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-06-04" OBS_VALUE="-1.36012" BBK_DIFF_A="0.00806"/>
      <bbk:Obs TIME_PERIOD="2021-06-03" OBS_VALUE="-1.36818" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2021-06-02" OBS_VALUE="-1.36818" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2021-06-01" OBS_VALUE="-1.36818" BBK_DIFF_A="0.03422"/>
      <bbk:Obs TIME_PERIOD="2021-05-31" OBS_VALUE="-1.4024" BBK_DIFF_A="-0.42478"/>
      <bbk:Obs TIME_PERIOD="2021-05-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-05-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-05-28" OBS_VALUE="-0.97762" BBK_DIFF_A="-0.03435"/>
      <bbk:Obs TIME_PERIOD="2021-05-27" OBS_VALUE="-0.94327" BBK_DIFF_A="0.04937"/>
      <bbk:Obs TIME_PERIOD="2021-05-26" OBS_VALUE="-0.99264" BBK_DIFF_A="0.00268"/>
      <bbk:Obs TIME_PERIOD="2021-05-25" OBS_VALUE="-0.99532" BBK_DIFF_A="0.00272"/>
      <bbk:Obs TIME_PERIOD="2021-05-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-05-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-05-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-05-21" OBS_VALUE="-0.99804" BBK_DIFF_A="0.11931"/>
      <bbk:Obs TIME_PERIOD="2021-05-20" OBS_VALUE="-1.11735" BBK_DIFF_A="-0.07831"/>
      <bbk:Obs TIME_PERIOD="2021-05-19" OBS_VALUE="-1.03904" BBK_DIFF_A="-0.05725"/>
      <bbk:Obs TIME_PERIOD="2021-05-18" OBS_VALUE="-0.98179" BBK_DIFF_A="0.1175"/>
      <bbk:Obs TIME_PERIOD="2021-05-17" OBS_VALUE="-1.09929" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2021-05-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-05-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-05-14" OBS_VALUE="-1.09929" BBK_DIFF_A="0.05427"/>
      <bbk:Obs TIME_PERIOD="2021-05-13" OBS_VALUE="-1.15356" BBK_DIFF_A="-0.10523"/>
      <bbk:Obs TIME_PERIOD="2021-05-12" OBS_VALUE="-1.04833" BBK_DIFF_A="-0.19642"/>
      <bbk:Obs TIME_PERIOD="2021-05-11" OBS_VALUE="-0.85191" BBK_DIFF_A="0.17861"/>
      <bbk:Obs TIME_PERIOD="2021-05-10" OBS_VALUE="-1.03052" BBK_DIFF_A="-0.04597"/>
      <bbk:Obs TIME_PERIOD="2021-05-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-05-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-05-07" OBS_VALUE="-0.98455" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2021-05-06" OBS_VALUE="-0.98455" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2021-05-05" OBS_VALUE="-0.98455" BBK_DIFF_A="0.02584"/>
      <bbk:Obs TIME_PERIOD="2021-05-04" OBS_VALUE="-1.01039" BBK_DIFF_A="-0.00523"/>
      <bbk:Obs TIME_PERIOD="2021-05-03" OBS_VALUE="-1.00516" BBK_DIFF_A="-0.011"/>
      <bbk:Obs TIME_PERIOD="2021-05-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-05-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-04-30" OBS_VALUE="-0.99416" BBK_DIFF_A="-0.03121"/>
      <bbk:Obs TIME_PERIOD="2021-04-29" OBS_VALUE="-0.96295" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2021-04-28" OBS_VALUE="-0.96295" BBK_DIFF_A="-0.10257"/>
      <bbk:Obs TIME_PERIOD="2021-04-27" OBS_VALUE="-0.86038" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2021-04-26" OBS_VALUE="-0.86038" BBK_DIFF_A="-0.01197"/>
      <bbk:Obs TIME_PERIOD="2021-04-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-04-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-04-23" OBS_VALUE="-0.84841" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2021-04-22" OBS_VALUE="-0.84841" BBK_DIFF_A="0.03041"/>
      <bbk:Obs TIME_PERIOD="2021-04-21" OBS_VALUE="-0.87882" BBK_DIFF_A="-0.00436"/>
      <bbk:Obs TIME_PERIOD="2021-04-20" OBS_VALUE="-0.87446" BBK_DIFF_A="-0.03358"/>
      <bbk:Obs TIME_PERIOD="2021-04-19" OBS_VALUE="-0.84088" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2021-04-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-04-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-04-16" OBS_VALUE="-0.84088" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2021-04-15" OBS_VALUE="-0.84088" BBK_DIFF_A="-0.0576"/>
      <bbk:Obs TIME_PERIOD="2021-04-14" OBS_VALUE="-0.78328" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2021-04-13" OBS_VALUE="-0.78328" BBK_DIFF_A="-0.01363"/>
      <bbk:Obs TIME_PERIOD="2021-04-12" OBS_VALUE="-0.76965" BBK_DIFF_A="-0.08984"/>
      <bbk:Obs TIME_PERIOD="2021-04-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-04-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-04-09" OBS_VALUE="-0.67981" BBK_DIFF_A="-0.00944"/>
      <bbk:Obs TIME_PERIOD="2021-04-08" OBS_VALUE="-0.67037" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2021-04-07" OBS_VALUE="-0.67037" BBK_DIFF_A="0.00859"/>
      <bbk:Obs TIME_PERIOD="2021-04-06" OBS_VALUE="-0.67896" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2021-04-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-04-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-04-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-04-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-04-01" OBS_VALUE="-0.67896" BBK_DIFF_A="0.19673"/>
      <bbk:Obs TIME_PERIOD="2021-03-31" OBS_VALUE="-0.87569" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2021-03-30" OBS_VALUE="-0.87569" BBK_DIFF_A="-0.04028"/>
      <bbk:Obs TIME_PERIOD="2021-03-29" OBS_VALUE="-0.83541" BBK_DIFF_A="-0.02729"/>
      <bbk:Obs TIME_PERIOD="2021-03-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-03-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-03-26" OBS_VALUE="-0.80812" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2021-03-25" OBS_VALUE="-0.80812" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2021-03-24" OBS_VALUE="-0.80812" BBK_DIFF_A="0.41032"/>
      <bbk:Obs TIME_PERIOD="2021-03-23" OBS_VALUE="-1.21844" BBK_DIFF_A="0.01974"/>
      <bbk:Obs TIME_PERIOD="2021-03-22" OBS_VALUE="-1.23818" BBK_DIFF_A="-0.01695"/>
      <bbk:Obs TIME_PERIOD="2021-03-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-03-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-03-19" OBS_VALUE="-1.22123" BBK_DIFF_A="0.02583"/>
      <bbk:Obs TIME_PERIOD="2021-03-18" OBS_VALUE="-1.24706" BBK_DIFF_A="-0.08271"/>
      <bbk:Obs TIME_PERIOD="2021-03-17" OBS_VALUE="-1.16435" BBK_DIFF_A="-0.02466"/>
      <bbk:Obs TIME_PERIOD="2021-03-16" OBS_VALUE="-1.13969" BBK_DIFF_A="0.00838"/>
      <bbk:Obs TIME_PERIOD="2021-03-15" OBS_VALUE="-1.14807" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2021-03-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-03-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-03-12" OBS_VALUE="-1.14807" BBK_DIFF_A="0.01316"/>
      <bbk:Obs TIME_PERIOD="2021-03-11" OBS_VALUE="-1.16123" BBK_DIFF_A="-0.33861"/>
      <bbk:Obs TIME_PERIOD="2021-03-10" OBS_VALUE="-0.82262" BBK_DIFF_A="0.28606"/>
      <bbk:Obs TIME_PERIOD="2021-03-09" OBS_VALUE="-1.10868" BBK_DIFF_A="0.04877"/>
      <bbk:Obs TIME_PERIOD="2021-03-08" OBS_VALUE="-1.15745" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2021-03-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-03-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-03-05" OBS_VALUE="-1.15745" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2021-03-04" OBS_VALUE="-1.15745" BBK_DIFF_A="-0.0346"/>
      <bbk:Obs TIME_PERIOD="2021-03-03" OBS_VALUE="-1.12285" BBK_DIFF_A="-0.0373"/>
      <bbk:Obs TIME_PERIOD="2021-03-02" OBS_VALUE="-1.08555" BBK_DIFF_A="-0.00873"/>
      <bbk:Obs TIME_PERIOD="2021-03-01" OBS_VALUE="-1.07682" BBK_DIFF_A="0.03911"/>
      <bbk:Obs TIME_PERIOD="2021-02-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-02-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-02-26" OBS_VALUE="-1.11593" BBK_DIFF_A="0.08883"/>
      <bbk:Obs TIME_PERIOD="2021-02-25" OBS_VALUE="-1.20476" BBK_DIFF_A="-0.01734"/>
      <bbk:Obs TIME_PERIOD="2021-02-24" OBS_VALUE="-1.18742" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2021-02-23" OBS_VALUE="-1.18742" BBK_DIFF_A="-0.04534"/>
      <bbk:Obs TIME_PERIOD="2021-02-22" OBS_VALUE="-1.14208" BBK_DIFF_A="-0.00586"/>
      <bbk:Obs TIME_PERIOD="2021-02-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-02-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-02-19" OBS_VALUE="-1.13622" BBK_DIFF_A="-0.02097"/>
      <bbk:Obs TIME_PERIOD="2021-02-18" OBS_VALUE="-1.11525" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2021-02-17" OBS_VALUE="-1.11525" BBK_DIFF_A="-0.00334"/>
      <bbk:Obs TIME_PERIOD="2021-02-16" OBS_VALUE="-1.11191" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2021-02-15" OBS_VALUE="-1.11191" BBK_DIFF_A="-0.11956"/>
      <bbk:Obs TIME_PERIOD="2021-02-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-02-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-02-12" OBS_VALUE="-0.99235" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2021-02-11" OBS_VALUE="-0.99235" BBK_DIFF_A="-0.41869"/>
      <bbk:Obs TIME_PERIOD="2021-02-10" OBS_VALUE="-0.57366" BBK_DIFF_A="0.03127"/>
      <bbk:Obs TIME_PERIOD="2021-02-09" OBS_VALUE="-0.60493" BBK_DIFF_A="-0.01049"/>
      <bbk:Obs TIME_PERIOD="2021-02-08" OBS_VALUE="-0.59444" BBK_DIFF_A="0.00787"/>
      <bbk:Obs TIME_PERIOD="2021-02-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-02-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-02-05" OBS_VALUE="-0.60231" BBK_DIFF_A="-0.00341"/>
      <bbk:Obs TIME_PERIOD="2021-02-04" OBS_VALUE="-0.5989" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2021-02-03" OBS_VALUE="-0.5989" BBK_DIFF_A="-0.00379"/>
      <bbk:Obs TIME_PERIOD="2021-02-02" OBS_VALUE="-0.59511" BBK_DIFF_A="0.26899"/>
      <bbk:Obs TIME_PERIOD="2021-02-01" OBS_VALUE="-0.8641" BBK_DIFF_A="-0.07834"/>
      <bbk:Obs TIME_PERIOD="2021-01-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-01-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-01-29" OBS_VALUE="-0.78576" BBK_DIFF_A="-0.0753"/>
      <bbk:Obs TIME_PERIOD="2021-01-28" OBS_VALUE="-0.71046" BBK_DIFF_A="0.10204"/>
      <bbk:Obs TIME_PERIOD="2021-01-27" OBS_VALUE="-0.8125" BBK_DIFF_A="-0.03006"/>
      <bbk:Obs TIME_PERIOD="2021-01-26" OBS_VALUE="-0.78244" BBK_DIFF_A="-0.00513"/>
      <bbk:Obs TIME_PERIOD="2021-01-25" OBS_VALUE="-0.77731" BBK_DIFF_A="0.02687"/>
      <bbk:Obs TIME_PERIOD="2021-01-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-01-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-01-22" OBS_VALUE="-0.80418" BBK_DIFF_A="-0.06504"/>
      <bbk:Obs TIME_PERIOD="2021-01-21" OBS_VALUE="-0.73914" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2021-01-20" OBS_VALUE="-0.73914" BBK_DIFF_A="0.04322"/>
      <bbk:Obs TIME_PERIOD="2021-01-19" OBS_VALUE="-0.78236" BBK_DIFF_A="-0.21379"/>
      <bbk:Obs TIME_PERIOD="2021-01-18" OBS_VALUE="-0.56857" BBK_DIFF_A="0.19082"/>
      <bbk:Obs TIME_PERIOD="2021-01-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-01-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-01-15" OBS_VALUE="-0.75939" BBK_DIFF_A="-5.6E-4"/>
      <bbk:Obs TIME_PERIOD="2021-01-14" OBS_VALUE="-0.75883" BBK_DIFF_A="-0.17398"/>
      <bbk:Obs TIME_PERIOD="2021-01-13" OBS_VALUE="-0.58485" BBK_DIFF_A="0.0076"/>
      <bbk:Obs TIME_PERIOD="2021-01-12" OBS_VALUE="-0.59245" BBK_DIFF_A="0.16379"/>
      <bbk:Obs TIME_PERIOD="2021-01-11" OBS_VALUE="-0.75624" BBK_DIFF_A="0.16118"/>
      <bbk:Obs TIME_PERIOD="2021-01-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-01-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-01-08" OBS_VALUE="-0.91742" BBK_DIFF_A="0.0883"/>
      <bbk:Obs TIME_PERIOD="2021-01-07" OBS_VALUE="-1.00572" BBK_DIFF_A="0.03696"/>
      <bbk:Obs TIME_PERIOD="2021-01-06" OBS_VALUE="-1.04268" BBK_DIFF_A="-0.11016"/>
      <bbk:Obs TIME_PERIOD="2021-01-05" OBS_VALUE="-0.93252" BBK_DIFF_A="0.05269"/>
      <bbk:Obs TIME_PERIOD="2021-01-04" OBS_VALUE="-0.98521" BBK_DIFF_A="0.03877"/>
      <bbk:Obs TIME_PERIOD="2021-01-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-01-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2021-01-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-12-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-12-30" OBS_VALUE="-1.02398" BBK_DIFF_A="0.03953"/>
      <bbk:Obs TIME_PERIOD="2020-12-29" OBS_VALUE="-1.06351" BBK_DIFF_A="0.00726"/>
      <bbk:Obs TIME_PERIOD="2020-12-28" OBS_VALUE="-1.07077" BBK_DIFF_A="-0.13486"/>
      <bbk:Obs TIME_PERIOD="2020-12-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-12-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-12-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-12-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-12-23" OBS_VALUE="-0.93591" BBK_DIFF_A="-0.01835"/>
      <bbk:Obs TIME_PERIOD="2020-12-22" OBS_VALUE="-0.91756" BBK_DIFF_A="-0.09088"/>
      <bbk:Obs TIME_PERIOD="2020-12-21" OBS_VALUE="-0.82668" BBK_DIFF_A="0.08955"/>
      <bbk:Obs TIME_PERIOD="2020-12-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-12-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-12-18" OBS_VALUE="-0.91623" BBK_DIFF_A="-0.02474"/>
      <bbk:Obs TIME_PERIOD="2020-12-17" OBS_VALUE="-0.89149" BBK_DIFF_A="-0.0411"/>
      <bbk:Obs TIME_PERIOD="2020-12-16" OBS_VALUE="-0.85039" BBK_DIFF_A="-0.00873"/>
      <bbk:Obs TIME_PERIOD="2020-12-15" OBS_VALUE="-0.84166" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2020-12-14" OBS_VALUE="-0.84166" BBK_DIFF_A="-0.0262"/>
      <bbk:Obs TIME_PERIOD="2020-12-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-12-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-12-11" OBS_VALUE="-0.81546" BBK_DIFF_A="0.03063"/>
      <bbk:Obs TIME_PERIOD="2020-12-10" OBS_VALUE="-0.84609" BBK_DIFF_A="0.02498"/>
      <bbk:Obs TIME_PERIOD="2020-12-09" OBS_VALUE="-0.87107" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2020-12-08" OBS_VALUE="-0.87107" BBK_DIFF_A="0.01477"/>
      <bbk:Obs TIME_PERIOD="2020-12-07" OBS_VALUE="-0.88584" BBK_DIFF_A="0.04477"/>
      <bbk:Obs TIME_PERIOD="2020-12-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-12-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-12-04" OBS_VALUE="-0.93061" BBK_DIFF_A="0.00244"/>
      <bbk:Obs TIME_PERIOD="2020-12-03" OBS_VALUE="-0.93305" BBK_DIFF_A="0.03886"/>
      <bbk:Obs TIME_PERIOD="2020-12-02" OBS_VALUE="-0.97191" BBK_DIFF_A="-0.10457"/>
      <bbk:Obs TIME_PERIOD="2020-12-01" OBS_VALUE="-0.86734" BBK_DIFF_A="-0.09601"/>
      <bbk:Obs TIME_PERIOD="2020-11-30" OBS_VALUE="-0.77133" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2020-11-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-11-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-11-27" OBS_VALUE="-0.77133" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2020-11-26" OBS_VALUE="-0.77133" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2020-11-25" OBS_VALUE="-0.77133" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2020-11-24" OBS_VALUE="-0.77133" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2020-11-23" OBS_VALUE="-0.77133" BBK_DIFF_A="-0.01347"/>
      <bbk:Obs TIME_PERIOD="2020-11-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-11-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-11-20" OBS_VALUE="-0.75786" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2020-11-19" OBS_VALUE="-0.75786" BBK_DIFF_A="0.03798"/>
      <bbk:Obs TIME_PERIOD="2020-11-18" OBS_VALUE="-0.79584" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2020-11-17" OBS_VALUE="-0.79584" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2020-11-16" OBS_VALUE="-0.79584" BBK_DIFF_A="0.02048"/>
      <bbk:Obs TIME_PERIOD="2020-11-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-11-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-11-13" OBS_VALUE="-0.81632" BBK_DIFF_A="0.04323"/>
      <bbk:Obs TIME_PERIOD="2020-11-12" OBS_VALUE="-0.85955" BBK_DIFF_A="0.04547"/>
      <bbk:Obs TIME_PERIOD="2020-11-11" OBS_VALUE="-0.90502" BBK_DIFF_A="-0.02913"/>
      <bbk:Obs TIME_PERIOD="2020-11-10" OBS_VALUE="-0.87589" BBK_DIFF_A="-0.15515"/>
      <bbk:Obs TIME_PERIOD="2020-11-09" OBS_VALUE="-0.72074" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2020-11-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-11-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-11-06" OBS_VALUE="-0.72074" BBK_DIFF_A="-0.04694"/>
      <bbk:Obs TIME_PERIOD="2020-11-05" OBS_VALUE="-0.6738" BBK_DIFF_A="0.02764"/>
      <bbk:Obs TIME_PERIOD="2020-11-04" OBS_VALUE="-0.70144" BBK_DIFF_A="0.0175"/>
      <bbk:Obs TIME_PERIOD="2020-11-03" OBS_VALUE="-0.71894" BBK_DIFF_A="0.02821"/>
      <bbk:Obs TIME_PERIOD="2020-11-02" OBS_VALUE="-0.74715" BBK_DIFF_A="-0.00724"/>
      <bbk:Obs TIME_PERIOD="2020-11-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-10-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-10-30" OBS_VALUE="-0.73991" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2020-10-29" OBS_VALUE="-0.73991" BBK_DIFF_A="-0.0757"/>
      <bbk:Obs TIME_PERIOD="2020-10-28" OBS_VALUE="-0.66421" BBK_DIFF_A="0.1477"/>
      <bbk:Obs TIME_PERIOD="2020-10-27" OBS_VALUE="-0.81191" BBK_DIFF_A="-0.66143"/>
      <bbk:Obs TIME_PERIOD="2020-10-26" OBS_VALUE="-0.15048" BBK_DIFF_A="-0.07524"/>
      <bbk:Obs TIME_PERIOD="2020-10-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-10-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-10-23" OBS_VALUE="-0.07524" BBK_DIFF_A="0.73277"/>
      <bbk:Obs TIME_PERIOD="2020-10-22" OBS_VALUE="-0.80801" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2020-10-21" OBS_VALUE="-0.80801" BBK_DIFF_A="-0.04728"/>
      <bbk:Obs TIME_PERIOD="2020-10-20" OBS_VALUE="-0.76073" BBK_DIFF_A="-0.14728"/>
      <bbk:Obs TIME_PERIOD="2020-10-19" OBS_VALUE="-0.61345" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2020-10-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-10-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-10-16" OBS_VALUE="-0.61345" BBK_DIFF_A="0.12219"/>
      <bbk:Obs TIME_PERIOD="2020-10-15" OBS_VALUE="-0.73564" BBK_DIFF_A="0.03884"/>
      <bbk:Obs TIME_PERIOD="2020-10-14" OBS_VALUE="-0.77448" BBK_DIFF_A="-0.01424"/>
      <bbk:Obs TIME_PERIOD="2020-10-13" OBS_VALUE="-0.76024" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2020-10-12" OBS_VALUE="-0.76024" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2020-10-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-10-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-10-09" OBS_VALUE="-0.76024" BBK_DIFF_A="0.07161"/>
      <bbk:Obs TIME_PERIOD="2020-10-08" OBS_VALUE="-0.83185" BBK_DIFF_A="-0.30394"/>
      <bbk:Obs TIME_PERIOD="2020-10-07" OBS_VALUE="-0.52791" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2020-10-06" OBS_VALUE="-0.52791" BBK_DIFF_A="0.06955"/>
      <bbk:Obs TIME_PERIOD="2020-10-05" OBS_VALUE="-0.59746" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2020-10-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-10-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-10-02" OBS_VALUE="-0.59746" BBK_DIFF_A="-0.01563"/>
      <bbk:Obs TIME_PERIOD="2020-10-01" OBS_VALUE="-0.58183" BBK_DIFF_A="0.04409"/>
      <bbk:Obs TIME_PERIOD="2020-09-30" OBS_VALUE="-0.62592" BBK_DIFF_A="0.01605"/>
      <bbk:Obs TIME_PERIOD="2020-09-29" OBS_VALUE="-0.64197" BBK_DIFF_A="0.06657"/>
      <bbk:Obs TIME_PERIOD="2020-09-28" OBS_VALUE="-0.70854" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2020-09-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-09-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-09-25" OBS_VALUE="-0.70854" BBK_DIFF_A="-0.04417"/>
      <bbk:Obs TIME_PERIOD="2020-09-24" OBS_VALUE="-0.66437" BBK_DIFF_A="0.03586"/>
      <bbk:Obs TIME_PERIOD="2020-09-23" OBS_VALUE="-0.70023" BBK_DIFF_A="-0.03614"/>
      <bbk:Obs TIME_PERIOD="2020-09-22" OBS_VALUE="-0.66409" BBK_DIFF_A="0.0227"/>
      <bbk:Obs TIME_PERIOD="2020-09-21" OBS_VALUE="-0.68679" BBK_DIFF_A="0.01353"/>
      <bbk:Obs TIME_PERIOD="2020-09-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-09-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-09-18" OBS_VALUE="-0.70032" BBK_DIFF_A="0.03237"/>
      <bbk:Obs TIME_PERIOD="2020-09-17" OBS_VALUE="-0.73269" BBK_DIFF_A="-0.01917"/>
      <bbk:Obs TIME_PERIOD="2020-09-16" OBS_VALUE="-0.71352" BBK_DIFF_A="-0.00258"/>
      <bbk:Obs TIME_PERIOD="2020-09-15" OBS_VALUE="-0.71094" BBK_DIFF_A="-0.01537"/>
      <bbk:Obs TIME_PERIOD="2020-09-14" OBS_VALUE="-0.69557" BBK_DIFF_A="0.00469"/>
      <bbk:Obs TIME_PERIOD="2020-09-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-09-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-09-11" OBS_VALUE="-0.70026" BBK_DIFF_A="0.34142"/>
      <bbk:Obs TIME_PERIOD="2020-09-10" OBS_VALUE="-1.04168" BBK_DIFF_A="-0.04376"/>
      <bbk:Obs TIME_PERIOD="2020-09-09" OBS_VALUE="-0.99792" BBK_DIFF_A="-0.01362"/>
      <bbk:Obs TIME_PERIOD="2020-09-08" OBS_VALUE="-0.9843" BBK_DIFF_A="0.00128"/>
      <bbk:Obs TIME_PERIOD="2020-09-07" OBS_VALUE="-0.98558" BBK_DIFF_A="-0.03071"/>
      <bbk:Obs TIME_PERIOD="2020-09-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-09-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-09-04" OBS_VALUE="-0.95487" BBK_DIFF_A="0.04992"/>
      <bbk:Obs TIME_PERIOD="2020-09-03" OBS_VALUE="-1.00479" BBK_DIFF_A="-0.00609"/>
      <bbk:Obs TIME_PERIOD="2020-09-02" OBS_VALUE="-0.9987" BBK_DIFF_A="0.07212"/>
      <bbk:Obs TIME_PERIOD="2020-09-01" OBS_VALUE="-1.07082" BBK_DIFF_A="0.0025"/>
      <bbk:Obs TIME_PERIOD="2020-08-31" OBS_VALUE="-1.07332" BBK_DIFF_A="-0.01521"/>
      <bbk:Obs TIME_PERIOD="2020-08-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-08-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-08-28" OBS_VALUE="-1.05811" BBK_DIFF_A="-0.11218"/>
      <bbk:Obs TIME_PERIOD="2020-08-27" OBS_VALUE="-0.94593" BBK_DIFF_A="0.06682"/>
      <bbk:Obs TIME_PERIOD="2020-08-26" OBS_VALUE="-1.01275" BBK_DIFF_A="-0.40931"/>
      <bbk:Obs TIME_PERIOD="2020-08-25" OBS_VALUE="-0.60344" BBK_DIFF_A="0.13954"/>
      <bbk:Obs TIME_PERIOD="2020-08-24" OBS_VALUE="-0.74298" BBK_DIFF_A="-0.08145"/>
      <bbk:Obs TIME_PERIOD="2020-08-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-08-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-08-21" OBS_VALUE="-0.66153" BBK_DIFF_A="0.05343"/>
      <bbk:Obs TIME_PERIOD="2020-08-20" OBS_VALUE="-0.71496" BBK_DIFF_A="0.03501"/>
      <bbk:Obs TIME_PERIOD="2020-08-19" OBS_VALUE="-0.74997" BBK_DIFF_A="0.01438"/>
      <bbk:Obs TIME_PERIOD="2020-08-18" OBS_VALUE="-0.76435" BBK_DIFF_A="0.0349"/>
      <bbk:Obs TIME_PERIOD="2020-08-17" OBS_VALUE="-0.79925" BBK_DIFF_A="-0.03086"/>
      <bbk:Obs TIME_PERIOD="2020-08-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-08-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-08-14" OBS_VALUE="-0.76839" BBK_DIFF_A="-0.00241"/>
      <bbk:Obs TIME_PERIOD="2020-08-13" OBS_VALUE="-0.76598" BBK_DIFF_A="-0.03084"/>
      <bbk:Obs TIME_PERIOD="2020-08-12" OBS_VALUE="-0.73514" BBK_DIFF_A="-0.02526"/>
      <bbk:Obs TIME_PERIOD="2020-08-11" OBS_VALUE="-0.70988" BBK_DIFF_A="-0.10283"/>
      <bbk:Obs TIME_PERIOD="2020-08-10" OBS_VALUE="-0.60705" BBK_DIFF_A="-0.02074"/>
      <bbk:Obs TIME_PERIOD="2020-08-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-08-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-08-07" OBS_VALUE="-0.58631" BBK_DIFF_A="0.06306"/>
      <bbk:Obs TIME_PERIOD="2020-08-06" OBS_VALUE="-0.64937" BBK_DIFF_A="-0.04917"/>
      <bbk:Obs TIME_PERIOD="2020-08-05" OBS_VALUE="-0.6002" BBK_DIFF_A="0.00191"/>
      <bbk:Obs TIME_PERIOD="2020-08-04" OBS_VALUE="-0.60211" BBK_DIFF_A="0.05369"/>
      <bbk:Obs TIME_PERIOD="2020-08-03" OBS_VALUE="-0.6558" BBK_DIFF_A="-0.02399"/>
      <bbk:Obs TIME_PERIOD="2020-08-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-08-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-07-31" OBS_VALUE="-0.63181" BBK_DIFF_A="7.2E-4"/>
      <bbk:Obs TIME_PERIOD="2020-07-30" OBS_VALUE="-0.63253" BBK_DIFF_A="-0.0072"/>
      <bbk:Obs TIME_PERIOD="2020-07-29" OBS_VALUE="-0.62533" BBK_DIFF_A="-0.01976"/>
      <bbk:Obs TIME_PERIOD="2020-07-28" OBS_VALUE="-0.60557" BBK_DIFF_A="0.01445"/>
      <bbk:Obs TIME_PERIOD="2020-07-27" OBS_VALUE="-0.62002" BBK_DIFF_A="0.06501"/>
      <bbk:Obs TIME_PERIOD="2020-07-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-07-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-07-24" OBS_VALUE="-0.68503" BBK_DIFF_A="-0.03942"/>
      <bbk:Obs TIME_PERIOD="2020-07-23" OBS_VALUE="-0.64561" BBK_DIFF_A="0.0318"/>
      <bbk:Obs TIME_PERIOD="2020-07-22" OBS_VALUE="-0.67741" BBK_DIFF_A="-0.00599"/>
      <bbk:Obs TIME_PERIOD="2020-07-21" OBS_VALUE="-0.67142" BBK_DIFF_A="0.08108"/>
      <bbk:Obs TIME_PERIOD="2020-07-20" OBS_VALUE="-0.7525" BBK_DIFF_A="-0.02582"/>
      <bbk:Obs TIME_PERIOD="2020-07-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-07-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-07-17" OBS_VALUE="-0.72668" BBK_DIFF_A="-9.9E-4"/>
      <bbk:Obs TIME_PERIOD="2020-07-16" OBS_VALUE="-0.72569" BBK_DIFF_A="0.00822"/>
      <bbk:Obs TIME_PERIOD="2020-07-15" OBS_VALUE="-0.73391" BBK_DIFF_A="-0.15747"/>
      <bbk:Obs TIME_PERIOD="2020-07-14" OBS_VALUE="-0.57644" BBK_DIFF_A="-0.05342"/>
      <bbk:Obs TIME_PERIOD="2020-07-13" OBS_VALUE="-0.52302" BBK_DIFF_A="-0.09842"/>
      <bbk:Obs TIME_PERIOD="2020-07-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-07-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-07-10" OBS_VALUE="-0.4246" BBK_DIFF_A="0.13424"/>
      <bbk:Obs TIME_PERIOD="2020-07-09" OBS_VALUE="-0.55884" BBK_DIFF_A="0.02337"/>
      <bbk:Obs TIME_PERIOD="2020-07-08" OBS_VALUE="-0.58221" BBK_DIFF_A="-0.03378"/>
      <bbk:Obs TIME_PERIOD="2020-07-07" OBS_VALUE="-0.54843" BBK_DIFF_A="-0.0733"/>
      <bbk:Obs TIME_PERIOD="2020-07-06" OBS_VALUE="-0.47513" BBK_DIFF_A="-0.05374"/>
      <bbk:Obs TIME_PERIOD="2020-07-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-07-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-07-03" OBS_VALUE="-0.42139" BBK_DIFF_A="0.0682"/>
      <bbk:Obs TIME_PERIOD="2020-07-02" OBS_VALUE="-0.48959" BBK_DIFF_A="0.10767"/>
      <bbk:Obs TIME_PERIOD="2020-07-01" OBS_VALUE="-0.59726" BBK_DIFF_A="-0.21861"/>
      <bbk:Obs TIME_PERIOD="2020-06-30" OBS_VALUE="-0.37865" BBK_DIFF_A="-0.11854"/>
      <bbk:Obs TIME_PERIOD="2020-06-29" OBS_VALUE="-0.26011" BBK_DIFF_A="0.03621"/>
      <bbk:Obs TIME_PERIOD="2020-06-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-06-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-06-26" OBS_VALUE="-0.29632" BBK_DIFF_A="-0.0143"/>
      <bbk:Obs TIME_PERIOD="2020-06-25" OBS_VALUE="-0.28202" BBK_DIFF_A="-0.04204"/>
      <bbk:Obs TIME_PERIOD="2020-06-24" OBS_VALUE="-0.23998" BBK_DIFF_A="0.01456"/>
      <bbk:Obs TIME_PERIOD="2020-06-23" OBS_VALUE="-0.25454" BBK_DIFF_A="0.07095"/>
      <bbk:Obs TIME_PERIOD="2020-06-22" OBS_VALUE="-0.32549" BBK_DIFF_A="0.00621"/>
      <bbk:Obs TIME_PERIOD="2020-06-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-06-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-06-19" OBS_VALUE="-0.3317" BBK_DIFF_A="0.09629"/>
      <bbk:Obs TIME_PERIOD="2020-06-18" OBS_VALUE="-0.42799" BBK_DIFF_A="-0.04594"/>
      <bbk:Obs TIME_PERIOD="2020-06-17" OBS_VALUE="-0.38205" BBK_DIFF_A="0.0018"/>
      <bbk:Obs TIME_PERIOD="2020-06-16" OBS_VALUE="-0.38385" BBK_DIFF_A="0.5645"/>
      <bbk:Obs TIME_PERIOD="2020-06-15" OBS_VALUE="-0.94835" BBK_DIFF_A="0.0075"/>
      <bbk:Obs TIME_PERIOD="2020-06-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-06-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-06-12" OBS_VALUE="-0.95585" BBK_DIFF_A="0.03967"/>
      <bbk:Obs TIME_PERIOD="2020-06-11" OBS_VALUE="-0.99552" BBK_DIFF_A="0.06961"/>
      <bbk:Obs TIME_PERIOD="2020-06-10" OBS_VALUE="-1.06513" BBK_DIFF_A="-0.01094"/>
      <bbk:Obs TIME_PERIOD="2020-06-09" OBS_VALUE="-1.05419" BBK_DIFF_A="0.10741"/>
      <bbk:Obs TIME_PERIOD="2020-06-08" OBS_VALUE="-1.1616" BBK_DIFF_A="-0.04768"/>
      <bbk:Obs TIME_PERIOD="2020-06-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-06-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-06-05" OBS_VALUE="-1.11392" BBK_DIFF_A="-0.12719"/>
      <bbk:Obs TIME_PERIOD="2020-06-04" OBS_VALUE="-0.98673" BBK_DIFF_A="-0.03591"/>
      <bbk:Obs TIME_PERIOD="2020-06-03" OBS_VALUE="-0.95082" BBK_DIFF_A="0.00391"/>
      <bbk:Obs TIME_PERIOD="2020-06-02" OBS_VALUE="-0.95473" BBK_DIFF_A="-0.09167"/>
      <bbk:Obs TIME_PERIOD="2020-06-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-05-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-05-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-05-29" OBS_VALUE="-0.86306" BBK_DIFF_A="-0.01995"/>
      <bbk:Obs TIME_PERIOD="2020-05-28" OBS_VALUE="-0.84311" BBK_DIFF_A="0.01625"/>
      <bbk:Obs TIME_PERIOD="2020-05-27" OBS_VALUE="-0.85936" BBK_DIFF_A="-0.26508"/>
      <bbk:Obs TIME_PERIOD="2020-05-26" OBS_VALUE="-0.59428" BBK_DIFF_A="-0.07996"/>
      <bbk:Obs TIME_PERIOD="2020-05-25" OBS_VALUE="-0.51432" BBK_DIFF_A="-0.00969"/>
      <bbk:Obs TIME_PERIOD="2020-05-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-05-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-05-22" OBS_VALUE="-0.50463" BBK_DIFF_A="-0.01794"/>
      <bbk:Obs TIME_PERIOD="2020-05-21" OBS_VALUE="-0.48669" BBK_DIFF_A="0.2977"/>
      <bbk:Obs TIME_PERIOD="2020-05-20" OBS_VALUE="-0.78439" BBK_DIFF_A="0.06615"/>
      <bbk:Obs TIME_PERIOD="2020-05-19" OBS_VALUE="-0.85054" BBK_DIFF_A="-0.02199"/>
      <bbk:Obs TIME_PERIOD="2020-05-18" OBS_VALUE="-0.82855" BBK_DIFF_A="-0.04057"/>
      <bbk:Obs TIME_PERIOD="2020-05-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-05-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-05-15" OBS_VALUE="-0.78798" BBK_DIFF_A="-0.01532"/>
      <bbk:Obs TIME_PERIOD="2020-05-14" OBS_VALUE="-0.77266" BBK_DIFF_A="0.01946"/>
      <bbk:Obs TIME_PERIOD="2020-05-13" OBS_VALUE="-0.79212" BBK_DIFF_A="0.08563"/>
      <bbk:Obs TIME_PERIOD="2020-05-12" OBS_VALUE="-0.87775" BBK_DIFF_A="0.05312"/>
      <bbk:Obs TIME_PERIOD="2020-05-11" OBS_VALUE="-0.93087" BBK_DIFF_A="0.03606"/>
      <bbk:Obs TIME_PERIOD="2020-05-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-05-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-05-08" OBS_VALUE="-0.96693" BBK_DIFF_A="0.00461"/>
      <bbk:Obs TIME_PERIOD="2020-05-07" OBS_VALUE="-0.97154" BBK_DIFF_A="0.08228"/>
      <bbk:Obs TIME_PERIOD="2020-05-06" OBS_VALUE="-1.05382" BBK_DIFF_A="0.03519"/>
      <bbk:Obs TIME_PERIOD="2020-05-05" OBS_VALUE="-1.08901" BBK_DIFF_A="-0.55886"/>
      <bbk:Obs TIME_PERIOD="2020-05-04" OBS_VALUE="-0.53015" BBK_DIFF_A="-0.02533"/>
      <bbk:Obs TIME_PERIOD="2020-05-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-05-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-05-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-04-30" OBS_VALUE="-0.50482" BBK_DIFF_A="0.00817"/>
      <bbk:Obs TIME_PERIOD="2020-04-29" OBS_VALUE="-0.51299" BBK_DIFF_A="0.01944"/>
      <bbk:Obs TIME_PERIOD="2020-04-28" OBS_VALUE="-0.53243" BBK_DIFF_A="0.02428"/>
      <bbk:Obs TIME_PERIOD="2020-04-27" OBS_VALUE="-0.55671" BBK_DIFF_A="0.02056"/>
      <bbk:Obs TIME_PERIOD="2020-04-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-04-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-04-24" OBS_VALUE="-0.57727" BBK_DIFF_A="-0.03756"/>
      <bbk:Obs TIME_PERIOD="2020-04-23" OBS_VALUE="-0.53971" BBK_DIFF_A="0.03723"/>
      <bbk:Obs TIME_PERIOD="2020-04-22" OBS_VALUE="-0.57694" BBK_DIFF_A="0.00762"/>
      <bbk:Obs TIME_PERIOD="2020-04-21" OBS_VALUE="-0.58456" BBK_DIFF_A="0.02784"/>
      <bbk:Obs TIME_PERIOD="2020-04-20" OBS_VALUE="-0.6124" BBK_DIFF_A="0.01734"/>
      <bbk:Obs TIME_PERIOD="2020-04-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-04-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-04-17" OBS_VALUE="-0.62974" BBK_DIFF_A="0.23797"/>
      <bbk:Obs TIME_PERIOD="2020-04-16" OBS_VALUE="-0.86771" BBK_DIFF_A="0.02446"/>
      <bbk:Obs TIME_PERIOD="2020-04-15" OBS_VALUE="-0.89217" BBK_DIFF_A="0.05832"/>
      <bbk:Obs TIME_PERIOD="2020-04-14" OBS_VALUE="-0.95049" BBK_DIFF_A="0.00504"/>
      <bbk:Obs TIME_PERIOD="2020-04-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-04-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-04-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-04-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-04-09" OBS_VALUE="-0.95553" BBK_DIFF_A="0.00288"/>
      <bbk:Obs TIME_PERIOD="2020-04-08" OBS_VALUE="-0.95841" BBK_DIFF_A="0.0265"/>
      <bbk:Obs TIME_PERIOD="2020-04-07" OBS_VALUE="-0.98491" BBK_DIFF_A="-0.0189"/>
      <bbk:Obs TIME_PERIOD="2020-04-06" OBS_VALUE="-0.96601" BBK_DIFF_A="-0.05142"/>
      <bbk:Obs TIME_PERIOD="2020-04-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-04-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-04-03" OBS_VALUE="-0.91459" BBK_DIFF_A="0.15825"/>
      <bbk:Obs TIME_PERIOD="2020-04-02" OBS_VALUE="-1.07284" BBK_DIFF_A="0.00973"/>
      <bbk:Obs TIME_PERIOD="2020-04-01" OBS_VALUE="-1.08257" BBK_DIFF_A="0.05207"/>
      <bbk:Obs TIME_PERIOD="2020-03-31" OBS_VALUE="-1.13464" BBK_DIFF_A="0.04756"/>
      <bbk:Obs TIME_PERIOD="2020-03-30" OBS_VALUE="-1.1822" BBK_DIFF_A="0.02371"/>
      <bbk:Obs TIME_PERIOD="2020-03-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-03-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-03-27" OBS_VALUE="-1.20591" BBK_DIFF_A="-0.05623"/>
      <bbk:Obs TIME_PERIOD="2020-03-26" OBS_VALUE="-1.14968" BBK_DIFF_A="-0.10576"/>
      <bbk:Obs TIME_PERIOD="2020-03-25" OBS_VALUE="-1.04392" BBK_DIFF_A="-0.0708"/>
      <bbk:Obs TIME_PERIOD="2020-03-24" OBS_VALUE="-0.97312" BBK_DIFF_A="0.10819"/>
      <bbk:Obs TIME_PERIOD="2020-03-23" OBS_VALUE="-1.08131" BBK_DIFF_A="1.71782"/>
      <bbk:Obs TIME_PERIOD="2020-03-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-03-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-03-20" OBS_VALUE="-2.79913" BBK_DIFF_A="-1.10455"/>
      <bbk:Obs TIME_PERIOD="2020-03-19" OBS_VALUE="-1.69458" BBK_DIFF_A="-0.7551"/>
      <bbk:Obs TIME_PERIOD="2020-03-18" OBS_VALUE="-0.93948" BBK_DIFF_A="0.06469"/>
      <bbk:Obs TIME_PERIOD="2020-03-17" OBS_VALUE="-1.00417" BBK_DIFF_A="-0.10881"/>
      <bbk:Obs TIME_PERIOD="2020-03-16" OBS_VALUE="-0.89536" BBK_DIFF_A="-0.08269"/>
      <bbk:Obs TIME_PERIOD="2020-03-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-03-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-03-13" OBS_VALUE="-0.81267" BBK_DIFF_A="0.01997"/>
      <bbk:Obs TIME_PERIOD="2020-03-12" OBS_VALUE="-0.83264" BBK_DIFF_A="-0.10288"/>
      <bbk:Obs TIME_PERIOD="2020-03-11" OBS_VALUE="-0.72976" BBK_DIFF_A="-0.05175"/>
      <bbk:Obs TIME_PERIOD="2020-03-10" OBS_VALUE="-0.67801" BBK_DIFF_A="-0.00233"/>
      <bbk:Obs TIME_PERIOD="2020-03-09" OBS_VALUE="-0.67568" BBK_DIFF_A="-0.01226"/>
      <bbk:Obs TIME_PERIOD="2020-03-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-03-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-03-06" OBS_VALUE="-0.66342" BBK_DIFF_A="-0.04284"/>
      <bbk:Obs TIME_PERIOD="2020-03-05" OBS_VALUE="-0.62058" BBK_DIFF_A="0.01516"/>
      <bbk:Obs TIME_PERIOD="2020-03-04" OBS_VALUE="-0.63574" BBK_DIFF_A="-0.02836"/>
      <bbk:Obs TIME_PERIOD="2020-03-03" OBS_VALUE="-0.60738" BBK_DIFF_A="0.02955"/>
      <bbk:Obs TIME_PERIOD="2020-03-02" OBS_VALUE="-0.63693" BBK_DIFF_A="0.02523"/>
      <bbk:Obs TIME_PERIOD="2020-03-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-02-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-02-28" OBS_VALUE="-0.66216" BBK_DIFF_A="-0.05563"/>
      <bbk:Obs TIME_PERIOD="2020-02-27" OBS_VALUE="-0.60653" BBK_DIFF_A="-0.00293"/>
      <bbk:Obs TIME_PERIOD="2020-02-26" OBS_VALUE="-0.6036" BBK_DIFF_A="-0.01369"/>
      <bbk:Obs TIME_PERIOD="2020-02-25" OBS_VALUE="-0.58991" BBK_DIFF_A="0.35367"/>
      <bbk:Obs TIME_PERIOD="2020-02-24" OBS_VALUE="-0.94358" BBK_DIFF_A="-0.00132"/>
      <bbk:Obs TIME_PERIOD="2020-02-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-02-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-02-21" OBS_VALUE="-0.94226" BBK_DIFF_A="0.12884"/>
      <bbk:Obs TIME_PERIOD="2020-02-20" OBS_VALUE="-1.0711" BBK_DIFF_A="-0.02138"/>
      <bbk:Obs TIME_PERIOD="2020-02-19" OBS_VALUE="-1.04972" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2020-02-18" OBS_VALUE="-1.04972" BBK_DIFF_A="0.02874"/>
      <bbk:Obs TIME_PERIOD="2020-02-17" OBS_VALUE="-1.07846" BBK_DIFF_A="0.03847"/>
      <bbk:Obs TIME_PERIOD="2020-02-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-02-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-02-14" OBS_VALUE="-1.11693" BBK_DIFF_A="-0.02535"/>
      <bbk:Obs TIME_PERIOD="2020-02-13" OBS_VALUE="-1.09158" BBK_DIFF_A="-0.00942"/>
      <bbk:Obs TIME_PERIOD="2020-02-12" OBS_VALUE="-1.08216" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2020-02-11" OBS_VALUE="-1.08216" BBK_DIFF_A="-0.00543"/>
      <bbk:Obs TIME_PERIOD="2020-02-10" OBS_VALUE="-1.07673" BBK_DIFF_A="0.01994"/>
      <bbk:Obs TIME_PERIOD="2020-02-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-02-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-02-07" OBS_VALUE="-1.09667" BBK_DIFF_A="0.02751"/>
      <bbk:Obs TIME_PERIOD="2020-02-06" OBS_VALUE="-1.12418" BBK_DIFF_A="-0.55486"/>
      <bbk:Obs TIME_PERIOD="2020-02-05" OBS_VALUE="-0.56932" BBK_DIFF_A="0.01854"/>
      <bbk:Obs TIME_PERIOD="2020-02-04" OBS_VALUE="-0.58786" BBK_DIFF_A="0.05271"/>
      <bbk:Obs TIME_PERIOD="2020-02-03" OBS_VALUE="-0.64057" BBK_DIFF_A="0.29489"/>
      <bbk:Obs TIME_PERIOD="2020-02-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-02-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-01-31" OBS_VALUE="-0.93546" BBK_DIFF_A="0.16507"/>
      <bbk:Obs TIME_PERIOD="2020-01-30" OBS_VALUE="-1.10053" BBK_DIFF_A="0.00378"/>
      <bbk:Obs TIME_PERIOD="2020-01-29" OBS_VALUE="-1.10431" BBK_DIFF_A="-0.07149"/>
      <bbk:Obs TIME_PERIOD="2020-01-28" OBS_VALUE="-1.03282" BBK_DIFF_A="0.14089"/>
      <bbk:Obs TIME_PERIOD="2020-01-27" OBS_VALUE="-1.17371" BBK_DIFF_A="-0.02927"/>
      <bbk:Obs TIME_PERIOD="2020-01-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-01-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-01-24" OBS_VALUE="-1.14444" BBK_DIFF_A="0.02539"/>
      <bbk:Obs TIME_PERIOD="2020-01-23" OBS_VALUE="-1.16983" BBK_DIFF_A="0.00251"/>
      <bbk:Obs TIME_PERIOD="2020-01-22" OBS_VALUE="-1.17234" BBK_DIFF_A="0.06147"/>
      <bbk:Obs TIME_PERIOD="2020-01-21" OBS_VALUE="-1.23381" BBK_DIFF_A="0.01445"/>
      <bbk:Obs TIME_PERIOD="2020-01-20" OBS_VALUE="-1.24826" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2020-01-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-01-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-01-17" OBS_VALUE="-1.24826" BBK_DIFF_A="-0.0051"/>
      <bbk:Obs TIME_PERIOD="2020-01-16" OBS_VALUE="-1.24316" BBK_DIFF_A="0.03864"/>
      <bbk:Obs TIME_PERIOD="2020-01-15" OBS_VALUE="-1.2818" BBK_DIFF_A="0.03189"/>
      <bbk:Obs TIME_PERIOD="2020-01-14" OBS_VALUE="-1.31369" BBK_DIFF_A="0.00926"/>
      <bbk:Obs TIME_PERIOD="2020-01-13" OBS_VALUE="-1.32295" BBK_DIFF_A="-0.22218"/>
      <bbk:Obs TIME_PERIOD="2020-01-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-01-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-01-10" OBS_VALUE="-1.10077" BBK_DIFF_A="0.18311"/>
      <bbk:Obs TIME_PERIOD="2020-01-09" OBS_VALUE="-1.28388" BBK_DIFF_A="-0.0378"/>
      <bbk:Obs TIME_PERIOD="2020-01-08" OBS_VALUE="-1.24608" BBK_DIFF_A="0.00552"/>
      <bbk:Obs TIME_PERIOD="2020-01-07" OBS_VALUE="-1.2516" BBK_DIFF_A="-0.01765"/>
      <bbk:Obs TIME_PERIOD="2020-01-06" OBS_VALUE="-1.23395" BBK_DIFF_A="-0.03169"/>
      <bbk:Obs TIME_PERIOD="2020-01-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-01-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2020-01-03" OBS_VALUE="-1.20226" BBK_DIFF_A="0.19453"/>
      <bbk:Obs TIME_PERIOD="2020-01-02" OBS_VALUE="-1.39679" BBK_DIFF_A="-0.03165"/>
      <bbk:Obs TIME_PERIOD="2020-01-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-12-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-12-30" OBS_VALUE="-1.36514" BBK_DIFF_A="-0.12766"/>
      <bbk:Obs TIME_PERIOD="2019-12-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-12-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-12-27" OBS_VALUE="-1.23748" BBK_DIFF_A="0.02038"/>
      <bbk:Obs TIME_PERIOD="2019-12-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-12-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-12-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-12-23" OBS_VALUE="-1.25786" BBK_DIFF_A="0.11361"/>
      <bbk:Obs TIME_PERIOD="2019-12-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-12-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-12-20" OBS_VALUE="-1.37147" BBK_DIFF_A="-0.0263"/>
      <bbk:Obs TIME_PERIOD="2019-12-19" OBS_VALUE="-1.34517" BBK_DIFF_A="-0.45021"/>
      <bbk:Obs TIME_PERIOD="2019-12-18" OBS_VALUE="-0.89496" BBK_DIFF_A="0.00397"/>
      <bbk:Obs TIME_PERIOD="2019-12-17" OBS_VALUE="-0.89893" BBK_DIFF_A="0.3458"/>
      <bbk:Obs TIME_PERIOD="2019-12-16" OBS_VALUE="-1.24473" BBK_DIFF_A="0.05889"/>
      <bbk:Obs TIME_PERIOD="2019-12-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-12-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-12-13" OBS_VALUE="-1.30362" BBK_DIFF_A="-0.06663"/>
      <bbk:Obs TIME_PERIOD="2019-12-12" OBS_VALUE="-1.23699" BBK_DIFF_A="-0.01208"/>
      <bbk:Obs TIME_PERIOD="2019-12-11" OBS_VALUE="-1.22491" BBK_DIFF_A="0.02983"/>
      <bbk:Obs TIME_PERIOD="2019-12-10" OBS_VALUE="-1.25474" BBK_DIFF_A="-0.03251"/>
      <bbk:Obs TIME_PERIOD="2019-12-09" OBS_VALUE="-1.22223" BBK_DIFF_A="-0.02076"/>
      <bbk:Obs TIME_PERIOD="2019-12-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-12-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-12-06" OBS_VALUE="-1.20147" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2019-12-05" OBS_VALUE="-1.20147" BBK_DIFF_A="-0.02077"/>
      <bbk:Obs TIME_PERIOD="2019-12-04" OBS_VALUE="-1.1807" BBK_DIFF_A="0.01056"/>
      <bbk:Obs TIME_PERIOD="2019-12-03" OBS_VALUE="-1.19126" BBK_DIFF_A="-0.02283"/>
      <bbk:Obs TIME_PERIOD="2019-12-02" OBS_VALUE="-1.16843" BBK_DIFF_A="-0.04271"/>
      <bbk:Obs TIME_PERIOD="2019-12-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-11-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-11-29" OBS_VALUE="-1.12572" BBK_DIFF_A="-0.11884"/>
      <bbk:Obs TIME_PERIOD="2019-11-28" OBS_VALUE="-1.00688" BBK_DIFF_A="0.02663"/>
      <bbk:Obs TIME_PERIOD="2019-11-27" OBS_VALUE="-1.03351" BBK_DIFF_A="0.10485"/>
      <bbk:Obs TIME_PERIOD="2019-11-26" OBS_VALUE="-1.13836" BBK_DIFF_A="-0.0071"/>
      <bbk:Obs TIME_PERIOD="2019-11-25" OBS_VALUE="-1.13126" BBK_DIFF_A="-0.01155"/>
      <bbk:Obs TIME_PERIOD="2019-11-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-11-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-11-22" OBS_VALUE="-1.11971" BBK_DIFF_A="0.04128"/>
      <bbk:Obs TIME_PERIOD="2019-11-21" OBS_VALUE="-1.16099" BBK_DIFF_A="-0.05447"/>
      <bbk:Obs TIME_PERIOD="2019-11-20" OBS_VALUE="-1.10652" BBK_DIFF_A="0.02931"/>
      <bbk:Obs TIME_PERIOD="2019-11-19" OBS_VALUE="-1.13583" BBK_DIFF_A="0.00253"/>
      <bbk:Obs TIME_PERIOD="2019-11-18" OBS_VALUE="-1.13836" BBK_DIFF_A="-0.00729"/>
      <bbk:Obs TIME_PERIOD="2019-11-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-11-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-11-15" OBS_VALUE="-1.13107" BBK_DIFF_A="0.02748"/>
      <bbk:Obs TIME_PERIOD="2019-11-14" OBS_VALUE="-1.15855" BBK_DIFF_A="0.0193"/>
      <bbk:Obs TIME_PERIOD="2019-11-13" OBS_VALUE="-1.17785" BBK_DIFF_A="0.0902"/>
      <bbk:Obs TIME_PERIOD="2019-11-12" OBS_VALUE="-1.26805" BBK_DIFF_A="-0.0546"/>
      <bbk:Obs TIME_PERIOD="2019-11-11" OBS_VALUE="-1.21345" BBK_DIFF_A="0.01008"/>
      <bbk:Obs TIME_PERIOD="2019-11-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-11-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-11-08" OBS_VALUE="-1.22353" BBK_DIFF_A="-0.05454"/>
      <bbk:Obs TIME_PERIOD="2019-11-07" OBS_VALUE="-1.16899" BBK_DIFF_A="0.00221"/>
      <bbk:Obs TIME_PERIOD="2019-11-06" OBS_VALUE="-1.1712" BBK_DIFF_A="0.02799"/>
      <bbk:Obs TIME_PERIOD="2019-11-05" OBS_VALUE="-1.19919" BBK_DIFF_A="-0.03859"/>
      <bbk:Obs TIME_PERIOD="2019-11-04" OBS_VALUE="-1.1606" BBK_DIFF_A="-0.02462"/>
      <bbk:Obs TIME_PERIOD="2019-11-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-11-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-11-01" OBS_VALUE="-1.13598" BBK_DIFF_A="-0.27199"/>
      <bbk:Obs TIME_PERIOD="2019-10-31" OBS_VALUE="-0.86399" BBK_DIFF_A="0.30017"/>
      <bbk:Obs TIME_PERIOD="2019-10-30" OBS_VALUE="-1.16416" BBK_DIFF_A="0.0057"/>
      <bbk:Obs TIME_PERIOD="2019-10-29" OBS_VALUE="-1.16986" BBK_DIFF_A="0.00788"/>
      <bbk:Obs TIME_PERIOD="2019-10-28" OBS_VALUE="-1.17774" BBK_DIFF_A="-0.04176"/>
      <bbk:Obs TIME_PERIOD="2019-10-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-10-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-10-25" OBS_VALUE="-1.13598" BBK_DIFF_A="-0.03294"/>
      <bbk:Obs TIME_PERIOD="2019-10-24" OBS_VALUE="-1.10304" BBK_DIFF_A="-0.23403"/>
      <bbk:Obs TIME_PERIOD="2019-10-23" OBS_VALUE="-0.86901" BBK_DIFF_A="0.2817"/>
      <bbk:Obs TIME_PERIOD="2019-10-22" OBS_VALUE="-1.15071" BBK_DIFF_A="-0.02406"/>
      <bbk:Obs TIME_PERIOD="2019-10-21" OBS_VALUE="-1.12665" BBK_DIFF_A="-0.03412"/>
      <bbk:Obs TIME_PERIOD="2019-10-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-10-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-10-18" OBS_VALUE="-1.09253" BBK_DIFF_A="7.3E-4"/>
      <bbk:Obs TIME_PERIOD="2019-10-17" OBS_VALUE="-1.09326" BBK_DIFF_A="-0.04846"/>
      <bbk:Obs TIME_PERIOD="2019-10-16" OBS_VALUE="-1.0448" BBK_DIFF_A="-0.05295"/>
      <bbk:Obs TIME_PERIOD="2019-10-15" OBS_VALUE="-0.99185" BBK_DIFF_A="0.02628"/>
      <bbk:Obs TIME_PERIOD="2019-10-14" OBS_VALUE="-1.01813" BBK_DIFF_A="-0.00629"/>
      <bbk:Obs TIME_PERIOD="2019-10-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-10-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-10-11" OBS_VALUE="-1.01184" BBK_DIFF_A="0.01335"/>
      <bbk:Obs TIME_PERIOD="2019-10-10" OBS_VALUE="-1.02519" BBK_DIFF_A="-0.01888"/>
      <bbk:Obs TIME_PERIOD="2019-10-09" OBS_VALUE="-1.00631" BBK_DIFF_A="-0.02419"/>
      <bbk:Obs TIME_PERIOD="2019-10-08" OBS_VALUE="-0.98212" BBK_DIFF_A="-0.01518"/>
      <bbk:Obs TIME_PERIOD="2019-10-07" OBS_VALUE="-0.96694" BBK_DIFF_A="0.01665"/>
      <bbk:Obs TIME_PERIOD="2019-10-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-10-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-10-04" OBS_VALUE="-0.98359" BBK_DIFF_A="0.26996"/>
      <bbk:Obs TIME_PERIOD="2019-10-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-10-02" OBS_VALUE="-1.25355" BBK_DIFF_A="0.06885"/>
      <bbk:Obs TIME_PERIOD="2019-10-01" OBS_VALUE="-1.3224" BBK_DIFF_A="-0.10327"/>
      <bbk:Obs TIME_PERIOD="2019-09-30" OBS_VALUE="-1.21913" BBK_DIFF_A="-0.06584"/>
      <bbk:Obs TIME_PERIOD="2019-09-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-09-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-09-27" OBS_VALUE="-1.15329" BBK_DIFF_A="-0.3314"/>
      <bbk:Obs TIME_PERIOD="2019-09-26" OBS_VALUE="-0.82189" BBK_DIFF_A="0.01448"/>
      <bbk:Obs TIME_PERIOD="2019-09-25" OBS_VALUE="-0.83637" BBK_DIFF_A="0.07321"/>
      <bbk:Obs TIME_PERIOD="2019-09-24" OBS_VALUE="-0.90958" BBK_DIFF_A="-0.01733"/>
      <bbk:Obs TIME_PERIOD="2019-09-23" OBS_VALUE="-0.89225" BBK_DIFF_A="0.08072"/>
      <bbk:Obs TIME_PERIOD="2019-09-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-09-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-09-20" OBS_VALUE="-0.97297" BBK_DIFF_A="0.05026"/>
      <bbk:Obs TIME_PERIOD="2019-09-19" OBS_VALUE="-1.02323" BBK_DIFF_A="-0.06267"/>
      <bbk:Obs TIME_PERIOD="2019-09-18" OBS_VALUE="-0.96056" BBK_DIFF_A="-0.0118"/>
      <bbk:Obs TIME_PERIOD="2019-09-17" OBS_VALUE="-0.94876" BBK_DIFF_A="-0.02372"/>
      <bbk:Obs TIME_PERIOD="2019-09-16" OBS_VALUE="-0.92504" BBK_DIFF_A="-0.00451"/>
      <bbk:Obs TIME_PERIOD="2019-09-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-09-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-09-13" OBS_VALUE="-0.92053" BBK_DIFF_A="0.01133"/>
      <bbk:Obs TIME_PERIOD="2019-09-12" OBS_VALUE="-0.93186" BBK_DIFF_A="0.49824"/>
      <bbk:Obs TIME_PERIOD="2019-09-11" OBS_VALUE="-1.4301" BBK_DIFF_A="-0.61672"/>
      <bbk:Obs TIME_PERIOD="2019-09-10" OBS_VALUE="-0.81338" BBK_DIFF_A="-0.05878"/>
      <bbk:Obs TIME_PERIOD="2019-09-09" OBS_VALUE="-0.7546" BBK_DIFF_A="0.0725"/>
      <bbk:Obs TIME_PERIOD="2019-09-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-09-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-09-06" OBS_VALUE="-0.8271" BBK_DIFF_A="-0.07515"/>
      <bbk:Obs TIME_PERIOD="2019-09-05" OBS_VALUE="-0.75195" BBK_DIFF_A="-0.03271"/>
      <bbk:Obs TIME_PERIOD="2019-09-04" OBS_VALUE="-0.71924" BBK_DIFF_A="0.01063"/>
      <bbk:Obs TIME_PERIOD="2019-09-03" OBS_VALUE="-0.72987" BBK_DIFF_A="-0.0072"/>
      <bbk:Obs TIME_PERIOD="2019-09-02" OBS_VALUE="-0.72267" BBK_DIFF_A="-0.01131"/>
      <bbk:Obs TIME_PERIOD="2019-09-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-08-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-08-30" OBS_VALUE="-0.71136" BBK_DIFF_A="-0.00362"/>
      <bbk:Obs TIME_PERIOD="2019-08-29" OBS_VALUE="-0.70774" BBK_DIFF_A="0.01125"/>
      <bbk:Obs TIME_PERIOD="2019-08-28" OBS_VALUE="-0.71899" BBK_DIFF_A="-0.0149"/>
      <bbk:Obs TIME_PERIOD="2019-08-27" OBS_VALUE="-0.70409" BBK_DIFF_A="-0.00108"/>
      <bbk:Obs TIME_PERIOD="2019-08-26" OBS_VALUE="-0.70301" BBK_DIFF_A="-0.00605"/>
      <bbk:Obs TIME_PERIOD="2019-08-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-08-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-08-23" OBS_VALUE="-0.69696" BBK_DIFF_A="0.00105"/>
      <bbk:Obs TIME_PERIOD="2019-08-22" OBS_VALUE="-0.69801" BBK_DIFF_A="0.30929"/>
      <bbk:Obs TIME_PERIOD="2019-08-21" OBS_VALUE="-1.0073" BBK_DIFF_A="-0.01751"/>
      <bbk:Obs TIME_PERIOD="2019-08-20" OBS_VALUE="-0.98979" BBK_DIFF_A="0.01914"/>
      <bbk:Obs TIME_PERIOD="2019-08-19" OBS_VALUE="-1.00893" BBK_DIFF_A="-0.14017"/>
      <bbk:Obs TIME_PERIOD="2019-08-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-08-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-08-16" OBS_VALUE="-0.86876" BBK_DIFF_A="0.04659"/>
      <bbk:Obs TIME_PERIOD="2019-08-15" OBS_VALUE="-0.91535" BBK_DIFF_A="0.0081"/>
      <bbk:Obs TIME_PERIOD="2019-08-14" OBS_VALUE="-0.92345" BBK_DIFF_A="0.09278"/>
      <bbk:Obs TIME_PERIOD="2019-08-13" OBS_VALUE="-1.01623" BBK_DIFF_A="0.03047"/>
      <bbk:Obs TIME_PERIOD="2019-08-12" OBS_VALUE="-1.0467" BBK_DIFF_A="0.00523"/>
      <bbk:Obs TIME_PERIOD="2019-08-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-08-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-08-09" OBS_VALUE="-1.05193" BBK_DIFF_A="-0.04221"/>
      <bbk:Obs TIME_PERIOD="2019-08-08" OBS_VALUE="-1.00972" BBK_DIFF_A="-0.09609"/>
      <bbk:Obs TIME_PERIOD="2019-08-07" OBS_VALUE="-0.91363" BBK_DIFF_A="0.11526"/>
      <bbk:Obs TIME_PERIOD="2019-08-06" OBS_VALUE="-1.02889" BBK_DIFF_A="-0.01496"/>
      <bbk:Obs TIME_PERIOD="2019-08-05" OBS_VALUE="-1.01393" BBK_DIFF_A="0.05163"/>
      <bbk:Obs TIME_PERIOD="2019-08-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-08-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-08-02" OBS_VALUE="-1.06556" BBK_DIFF_A="0.08938"/>
      <bbk:Obs TIME_PERIOD="2019-08-01" OBS_VALUE="-1.15494" BBK_DIFF_A="0.31912"/>
      <bbk:Obs TIME_PERIOD="2019-07-31" OBS_VALUE="-1.47406" BBK_DIFF_A="0.02754"/>
      <bbk:Obs TIME_PERIOD="2019-07-30" OBS_VALUE="-1.5016" BBK_DIFF_A="-0.05658"/>
      <bbk:Obs TIME_PERIOD="2019-07-29" OBS_VALUE="-1.44502" BBK_DIFF_A="-0.06754"/>
      <bbk:Obs TIME_PERIOD="2019-07-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-07-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-07-26" OBS_VALUE="-1.37748" BBK_DIFF_A="-0.04067"/>
      <bbk:Obs TIME_PERIOD="2019-07-25" OBS_VALUE="-1.33681" BBK_DIFF_A="0.04592"/>
      <bbk:Obs TIME_PERIOD="2019-07-24" OBS_VALUE="-1.38273" BBK_DIFF_A="0.05418"/>
      <bbk:Obs TIME_PERIOD="2019-07-23" OBS_VALUE="-1.43691" BBK_DIFF_A="-0.01754"/>
      <bbk:Obs TIME_PERIOD="2019-07-22" OBS_VALUE="-1.41937" BBK_DIFF_A="0.04282"/>
      <bbk:Obs TIME_PERIOD="2019-07-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-07-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-07-19" OBS_VALUE="-1.46219" BBK_DIFF_A="-0.07861"/>
      <bbk:Obs TIME_PERIOD="2019-07-18" OBS_VALUE="-1.38358" BBK_DIFF_A="0.01704"/>
      <bbk:Obs TIME_PERIOD="2019-07-17" OBS_VALUE="-1.40062" BBK_DIFF_A="0.00312"/>
      <bbk:Obs TIME_PERIOD="2019-07-16" OBS_VALUE="-1.40374" BBK_DIFF_A="0.06865"/>
      <bbk:Obs TIME_PERIOD="2019-07-15" OBS_VALUE="-1.47239" BBK_DIFF_A="0.04247"/>
      <bbk:Obs TIME_PERIOD="2019-07-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-07-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-07-12" OBS_VALUE="-1.51486" BBK_DIFF_A="-0.12817"/>
      <bbk:Obs TIME_PERIOD="2019-07-11" OBS_VALUE="-1.38669" BBK_DIFF_A="0.01519"/>
      <bbk:Obs TIME_PERIOD="2019-07-10" OBS_VALUE="-1.40188" BBK_DIFF_A="-0.03654"/>
      <bbk:Obs TIME_PERIOD="2019-07-09" OBS_VALUE="-1.36534" BBK_DIFF_A="-0.05236"/>
      <bbk:Obs TIME_PERIOD="2019-07-08" OBS_VALUE="-1.31298" BBK_DIFF_A="0.02217"/>
      <bbk:Obs TIME_PERIOD="2019-07-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-07-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-07-05" OBS_VALUE="-1.33515" BBK_DIFF_A="-0.02025"/>
      <bbk:Obs TIME_PERIOD="2019-07-04" OBS_VALUE="-1.3149" BBK_DIFF_A="0.01537"/>
      <bbk:Obs TIME_PERIOD="2019-07-03" OBS_VALUE="-1.33027" BBK_DIFF_A="-0.03673"/>
      <bbk:Obs TIME_PERIOD="2019-07-02" OBS_VALUE="-1.29354" BBK_DIFF_A="-0.06828"/>
      <bbk:Obs TIME_PERIOD="2019-07-01" OBS_VALUE="-1.22526" BBK_DIFF_A="0.01193"/>
      <bbk:Obs TIME_PERIOD="2019-06-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-06-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-06-28" OBS_VALUE="-1.23719" BBK_DIFF_A="0.13102"/>
      <bbk:Obs TIME_PERIOD="2019-06-27" OBS_VALUE="-1.36821" BBK_DIFF_A="-0.00246"/>
      <bbk:Obs TIME_PERIOD="2019-06-26" OBS_VALUE="-1.36575" BBK_DIFF_A="-0.02623"/>
      <bbk:Obs TIME_PERIOD="2019-06-25" OBS_VALUE="-1.33952" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2019-06-24" OBS_VALUE="-1.33952" BBK_DIFF_A="-0.04863"/>
      <bbk:Obs TIME_PERIOD="2019-06-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-06-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-06-21" OBS_VALUE="-1.29089" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2019-06-20" OBS_VALUE="-1.29089" BBK_DIFF_A="-0.06404"/>
      <bbk:Obs TIME_PERIOD="2019-06-19" OBS_VALUE="-1.22685" BBK_DIFF_A="0.09731"/>
      <bbk:Obs TIME_PERIOD="2019-06-18" OBS_VALUE="-1.32416" BBK_DIFF_A="0.02793"/>
      <bbk:Obs TIME_PERIOD="2019-06-17" OBS_VALUE="-1.35209" BBK_DIFF_A="-0.02031"/>
      <bbk:Obs TIME_PERIOD="2019-06-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-06-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-06-14" OBS_VALUE="-1.33178" BBK_DIFF_A="0.06981"/>
      <bbk:Obs TIME_PERIOD="2019-06-13" OBS_VALUE="-1.40159" BBK_DIFF_A="0.01358"/>
      <bbk:Obs TIME_PERIOD="2019-06-12" OBS_VALUE="-1.41517" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2019-06-11" OBS_VALUE="-1.41517" BBK_DIFF_A="-0.02179"/>
      <bbk:Obs TIME_PERIOD="2019-06-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-06-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-06-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-06-07" OBS_VALUE="-1.39338" BBK_DIFF_A="0.06174"/>
      <bbk:Obs TIME_PERIOD="2019-06-06" OBS_VALUE="-1.45512" BBK_DIFF_A="1.7E-4"/>
      <bbk:Obs TIME_PERIOD="2019-06-05" OBS_VALUE="-1.45529" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2019-06-04" OBS_VALUE="-1.45529" BBK_DIFF_A="0.03186"/>
      <bbk:Obs TIME_PERIOD="2019-06-03" OBS_VALUE="-1.48715" BBK_DIFF_A="0.01465"/>
      <bbk:Obs TIME_PERIOD="2019-06-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-06-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-05-31" OBS_VALUE="-1.5018" BBK_DIFF_A="0.04332"/>
      <bbk:Obs TIME_PERIOD="2019-05-30" OBS_VALUE="-1.54512" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2019-05-29" OBS_VALUE="-1.54512" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2019-05-28" OBS_VALUE="-1.54512" BBK_DIFF_A="0.02145"/>
      <bbk:Obs TIME_PERIOD="2019-05-27" OBS_VALUE="-1.56657" BBK_DIFF_A="0.04798"/>
      <bbk:Obs TIME_PERIOD="2019-05-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-05-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-05-24" OBS_VALUE="-1.61455" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2019-05-23" OBS_VALUE="-1.61455" BBK_DIFF_A="0.00454"/>
      <bbk:Obs TIME_PERIOD="2019-05-22" OBS_VALUE="-1.61909" BBK_DIFF_A="-0.04222"/>
      <bbk:Obs TIME_PERIOD="2019-05-21" OBS_VALUE="-1.57687" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2019-05-20" OBS_VALUE="-1.57687" BBK_DIFF_A="-0.01928"/>
      <bbk:Obs TIME_PERIOD="2019-05-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-05-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-05-17" OBS_VALUE="-1.55759" BBK_DIFF_A="-0.00831"/>
      <bbk:Obs TIME_PERIOD="2019-05-16" OBS_VALUE="-1.54928" BBK_DIFF_A="0.05879"/>
      <bbk:Obs TIME_PERIOD="2019-05-15" OBS_VALUE="-1.60807" BBK_DIFF_A="-0.00249"/>
      <bbk:Obs TIME_PERIOD="2019-05-14" OBS_VALUE="-1.60558" BBK_DIFF_A="0.06873"/>
      <bbk:Obs TIME_PERIOD="2019-05-13" OBS_VALUE="-1.67431" BBK_DIFF_A="0.02053"/>
      <bbk:Obs TIME_PERIOD="2019-05-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-05-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-05-10" OBS_VALUE="-1.69484" BBK_DIFF_A="-0.03255"/>
      <bbk:Obs TIME_PERIOD="2019-05-09" OBS_VALUE="-1.66229" BBK_DIFF_A="0.02607"/>
      <bbk:Obs TIME_PERIOD="2019-05-08" OBS_VALUE="-1.68836" BBK_DIFF_A="0.00848"/>
      <bbk:Obs TIME_PERIOD="2019-05-07" OBS_VALUE="-1.69684" BBK_DIFF_A="0.02908"/>
      <bbk:Obs TIME_PERIOD="2019-05-06" OBS_VALUE="-1.72592" BBK_DIFF_A="0.01012"/>
      <bbk:Obs TIME_PERIOD="2019-05-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-05-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-05-03" OBS_VALUE="-1.73604" BBK_DIFF_A="-0.02996"/>
      <bbk:Obs TIME_PERIOD="2019-05-02" OBS_VALUE="-1.70608" BBK_DIFF_A="0.04742"/>
      <bbk:Obs TIME_PERIOD="2019-05-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-04-30" OBS_VALUE="-1.7535" BBK_DIFF_A="-0.03914"/>
      <bbk:Obs TIME_PERIOD="2019-04-29" OBS_VALUE="-1.71436" BBK_DIFF_A="-0.01576"/>
      <bbk:Obs TIME_PERIOD="2019-04-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-04-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-04-26" OBS_VALUE="-1.6986" BBK_DIFF_A="-0.30948"/>
      <bbk:Obs TIME_PERIOD="2019-04-25" OBS_VALUE="-1.38912" BBK_DIFF_A="0.09216"/>
      <bbk:Obs TIME_PERIOD="2019-04-24" OBS_VALUE="-1.48128" BBK_DIFF_A="0.04149"/>
      <bbk:Obs TIME_PERIOD="2019-04-23" OBS_VALUE="-1.52277" BBK_DIFF_A="0.25676"/>
      <bbk:Obs TIME_PERIOD="2019-04-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-04-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-04-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-04-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-04-18" OBS_VALUE="-1.77953" BBK_DIFF_A="0.05595"/>
      <bbk:Obs TIME_PERIOD="2019-04-17" OBS_VALUE="-1.83548" BBK_DIFF_A="-0.02961"/>
      <bbk:Obs TIME_PERIOD="2019-04-16" OBS_VALUE="-1.80587" BBK_DIFF_A="-0.25875"/>
      <bbk:Obs TIME_PERIOD="2019-04-15" OBS_VALUE="-1.54712" BBK_DIFF_A="-0.10609"/>
      <bbk:Obs TIME_PERIOD="2019-04-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-04-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-04-12" OBS_VALUE="-1.44103" BBK_DIFF_A="0.10526"/>
      <bbk:Obs TIME_PERIOD="2019-04-11" OBS_VALUE="-1.54629" BBK_DIFF_A="-0.16582"/>
      <bbk:Obs TIME_PERIOD="2019-04-10" OBS_VALUE="-1.38047" BBK_DIFF_A="0.05801"/>
      <bbk:Obs TIME_PERIOD="2019-04-09" OBS_VALUE="-1.43848" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2019-04-08" OBS_VALUE="-1.43848" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2019-04-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-04-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-04-05" OBS_VALUE="-1.43848" BBK_DIFF_A="-0.08135"/>
      <bbk:Obs TIME_PERIOD="2019-04-04" OBS_VALUE="-1.35713" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2019-04-03" OBS_VALUE="-1.35713" BBK_DIFF_A="0.26148"/>
      <bbk:Obs TIME_PERIOD="2019-04-02" OBS_VALUE="-1.61861" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2019-04-01" OBS_VALUE="-1.61861" BBK_DIFF_A="-0.06575"/>
      <bbk:Obs TIME_PERIOD="2019-03-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-03-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-03-29" OBS_VALUE="-1.55286" BBK_DIFF_A="-1.00505"/>
      <bbk:Obs TIME_PERIOD="2019-03-28" OBS_VALUE="-0.54781" BBK_DIFF_A="0.00906"/>
      <bbk:Obs TIME_PERIOD="2019-03-27" OBS_VALUE="-0.55687" BBK_DIFF_A="8.8E-4"/>
      <bbk:Obs TIME_PERIOD="2019-03-26" OBS_VALUE="-0.55775" BBK_DIFF_A="0.0078"/>
      <bbk:Obs TIME_PERIOD="2019-03-25" OBS_VALUE="-0.56555" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2019-03-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-03-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-03-22" OBS_VALUE="-0.56555" BBK_DIFF_A="-0.01274"/>
      <bbk:Obs TIME_PERIOD="2019-03-21" OBS_VALUE="-0.55281" BBK_DIFF_A="0.0028"/>
      <bbk:Obs TIME_PERIOD="2019-03-20" OBS_VALUE="-0.55561" BBK_DIFF_A="6.3E-4"/>
      <bbk:Obs TIME_PERIOD="2019-03-19" OBS_VALUE="-0.55624" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2019-03-18" OBS_VALUE="-0.55624" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2019-03-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-03-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-03-15" OBS_VALUE="-0.55624" BBK_DIFF_A="-7.1E-4"/>
      <bbk:Obs TIME_PERIOD="2019-03-14" OBS_VALUE="-0.55553" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2019-03-13" OBS_VALUE="-0.55553" BBK_DIFF_A="-0.01107"/>
      <bbk:Obs TIME_PERIOD="2019-03-12" OBS_VALUE="-0.54446" BBK_DIFF_A="7.0E-4"/>
      <bbk:Obs TIME_PERIOD="2019-03-11" OBS_VALUE="-0.54516" BBK_DIFF_A="0.00557"/>
      <bbk:Obs TIME_PERIOD="2019-03-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-03-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-03-08" OBS_VALUE="-0.55073" BBK_DIFF_A="1.35527"/>
      <bbk:Obs TIME_PERIOD="2019-03-07" OBS_VALUE="-1.906" BBK_DIFF_A="-0.02298"/>
      <bbk:Obs TIME_PERIOD="2019-03-06" OBS_VALUE="-1.88302" BBK_DIFF_A="0.01115"/>
      <bbk:Obs TIME_PERIOD="2019-03-05" OBS_VALUE="-1.89417" BBK_DIFF_A="-0.00776"/>
      <bbk:Obs TIME_PERIOD="2019-03-04" OBS_VALUE="-1.88641" BBK_DIFF_A="0.02072"/>
      <bbk:Obs TIME_PERIOD="2019-03-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-03-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-03-01" OBS_VALUE="-1.90713" BBK_DIFF_A="-0.06616"/>
      <bbk:Obs TIME_PERIOD="2019-02-28" OBS_VALUE="-1.84097" BBK_DIFF_A="-0.01808"/>
      <bbk:Obs TIME_PERIOD="2019-02-27" OBS_VALUE="-1.82289" BBK_DIFF_A="0.00869"/>
      <bbk:Obs TIME_PERIOD="2019-02-26" OBS_VALUE="-1.83158" BBK_DIFF_A="-0.56814"/>
      <bbk:Obs TIME_PERIOD="2019-02-25" OBS_VALUE="-1.26344" BBK_DIFF_A="0.0302"/>
      <bbk:Obs TIME_PERIOD="2019-02-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-02-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-02-22" OBS_VALUE="-1.29364" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2019-02-21" OBS_VALUE="-1.29364" BBK_DIFF_A="0.095"/>
      <bbk:Obs TIME_PERIOD="2019-02-20" OBS_VALUE="-1.38864" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2019-02-19" OBS_VALUE="-1.38864" BBK_DIFF_A="0.12816"/>
      <bbk:Obs TIME_PERIOD="2019-02-18" OBS_VALUE="-1.5168" BBK_DIFF_A="-0.19356"/>
      <bbk:Obs TIME_PERIOD="2019-02-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-02-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-02-15" OBS_VALUE="-1.32324" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2019-02-14" OBS_VALUE="-1.32324" BBK_DIFF_A="0.28413"/>
      <bbk:Obs TIME_PERIOD="2019-02-13" OBS_VALUE="-1.60737" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2019-02-12" OBS_VALUE="-1.60737" BBK_DIFF_A="-0.0138"/>
      <bbk:Obs TIME_PERIOD="2019-02-11" OBS_VALUE="-1.59357" BBK_DIFF_A="-0.15633"/>
      <bbk:Obs TIME_PERIOD="2019-02-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-02-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-02-08" OBS_VALUE="-1.43724" BBK_DIFF_A="0.0656"/>
      <bbk:Obs TIME_PERIOD="2019-02-07" OBS_VALUE="-1.50284" BBK_DIFF_A="0.16685"/>
      <bbk:Obs TIME_PERIOD="2019-02-06" OBS_VALUE="-1.66969" BBK_DIFF_A="0.09242"/>
      <bbk:Obs TIME_PERIOD="2019-02-05" OBS_VALUE="-1.76211" BBK_DIFF_A="-0.00926"/>
      <bbk:Obs TIME_PERIOD="2019-02-04" OBS_VALUE="-1.75285" BBK_DIFF_A="0.00784"/>
      <bbk:Obs TIME_PERIOD="2019-02-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-02-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-02-01" OBS_VALUE="-1.76069" BBK_DIFF_A="0.0037"/>
      <bbk:Obs TIME_PERIOD="2019-01-31" OBS_VALUE="-1.76439" BBK_DIFF_A="0.01486"/>
      <bbk:Obs TIME_PERIOD="2019-01-30" OBS_VALUE="-1.77925" BBK_DIFF_A="0.00709"/>
      <bbk:Obs TIME_PERIOD="2019-01-29" OBS_VALUE="-1.78634" BBK_DIFF_A="-0.01023"/>
      <bbk:Obs TIME_PERIOD="2019-01-28" OBS_VALUE="-1.77611" BBK_DIFF_A="0.00138"/>
      <bbk:Obs TIME_PERIOD="2019-01-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-01-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-01-25" OBS_VALUE="-1.77749" BBK_DIFF_A="-0.12765"/>
      <bbk:Obs TIME_PERIOD="2019-01-24" OBS_VALUE="-1.64984" BBK_DIFF_A="0.05881"/>
      <bbk:Obs TIME_PERIOD="2019-01-23" OBS_VALUE="-1.70865" BBK_DIFF_A="0.13224"/>
      <bbk:Obs TIME_PERIOD="2019-01-22" OBS_VALUE="-1.84089" BBK_DIFF_A="4.9E-4"/>
      <bbk:Obs TIME_PERIOD="2019-01-21" OBS_VALUE="-1.84138" BBK_DIFF_A="0.03329"/>
      <bbk:Obs TIME_PERIOD="2019-01-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-01-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-01-18" OBS_VALUE="-1.87467" BBK_DIFF_A="-0.02228"/>
      <bbk:Obs TIME_PERIOD="2019-01-17" OBS_VALUE="-1.85239" BBK_DIFF_A="-0.00746"/>
      <bbk:Obs TIME_PERIOD="2019-01-16" OBS_VALUE="-1.84493" BBK_DIFF_A="-0.02448"/>
      <bbk:Obs TIME_PERIOD="2019-01-15" OBS_VALUE="-1.82045" BBK_DIFF_A="0.03267"/>
      <bbk:Obs TIME_PERIOD="2019-01-14" OBS_VALUE="-1.85312" BBK_DIFF_A="0.01998"/>
      <bbk:Obs TIME_PERIOD="2019-01-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-01-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-01-11" OBS_VALUE="-1.8731" BBK_DIFF_A="-0.1643"/>
      <bbk:Obs TIME_PERIOD="2019-01-10" OBS_VALUE="-1.7088" BBK_DIFF_A="0.0518"/>
      <bbk:Obs TIME_PERIOD="2019-01-09" OBS_VALUE="-1.7606" BBK_DIFF_A="0.00477"/>
      <bbk:Obs TIME_PERIOD="2019-01-08" OBS_VALUE="-1.76537" BBK_DIFF_A="-0.04288"/>
      <bbk:Obs TIME_PERIOD="2019-01-07" OBS_VALUE="-1.72249" BBK_DIFF_A="-0.02575"/>
      <bbk:Obs TIME_PERIOD="2019-01-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-01-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-01-04" OBS_VALUE="-1.69674" BBK_DIFF_A="0.00544"/>
      <bbk:Obs TIME_PERIOD="2019-01-03" OBS_VALUE="-1.70218" BBK_DIFF_A="0.04847"/>
      <bbk:Obs TIME_PERIOD="2019-01-02" OBS_VALUE="-1.75065" BBK_DIFF_A="0.53365"/>
      <bbk:Obs TIME_PERIOD="2019-01-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-12-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-12-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-12-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-12-28" OBS_VALUE="-2.2843" BBK_DIFF_A="0.07756"/>
      <bbk:Obs TIME_PERIOD="2018-12-27" OBS_VALUE="-2.36186" BBK_DIFF_A="-0.06287"/>
      <bbk:Obs TIME_PERIOD="2018-12-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-12-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-12-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-12-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-12-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-12-21" OBS_VALUE="-2.29899" BBK_DIFF_A="0.11805"/>
      <bbk:Obs TIME_PERIOD="2018-12-20" OBS_VALUE="-2.41704" BBK_DIFF_A="-0.03433"/>
      <bbk:Obs TIME_PERIOD="2018-12-19" OBS_VALUE="-2.38271" BBK_DIFF_A="0.01628"/>
      <bbk:Obs TIME_PERIOD="2018-12-18" OBS_VALUE="-2.39899" BBK_DIFF_A="0.04136"/>
      <bbk:Obs TIME_PERIOD="2018-12-17" OBS_VALUE="-2.44035" BBK_DIFF_A="-0.1211"/>
      <bbk:Obs TIME_PERIOD="2018-12-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-12-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-12-14" OBS_VALUE="-2.31925" BBK_DIFF_A="-0.21775"/>
      <bbk:Obs TIME_PERIOD="2018-12-13" OBS_VALUE="-2.1015" BBK_DIFF_A="-0.00495"/>
      <bbk:Obs TIME_PERIOD="2018-12-12" OBS_VALUE="-2.09655" BBK_DIFF_A="0.04417"/>
      <bbk:Obs TIME_PERIOD="2018-12-11" OBS_VALUE="-2.14072" BBK_DIFF_A="0.01271"/>
      <bbk:Obs TIME_PERIOD="2018-12-10" OBS_VALUE="-2.15343" BBK_DIFF_A="-0.03428"/>
      <bbk:Obs TIME_PERIOD="2018-12-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-12-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-12-07" OBS_VALUE="-2.11915" BBK_DIFF_A="-0.83626"/>
      <bbk:Obs TIME_PERIOD="2018-12-06" OBS_VALUE="-1.28289" BBK_DIFF_A="0.94133"/>
      <bbk:Obs TIME_PERIOD="2018-12-05" OBS_VALUE="-2.22422" BBK_DIFF_A="0.09056"/>
      <bbk:Obs TIME_PERIOD="2018-12-04" OBS_VALUE="-2.31478" BBK_DIFF_A="0.02301"/>
      <bbk:Obs TIME_PERIOD="2018-12-03" OBS_VALUE="-2.33779" BBK_DIFF_A="0.00323"/>
      <bbk:Obs TIME_PERIOD="2018-12-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-12-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-11-30" OBS_VALUE="-2.34102" BBK_DIFF_A="0.02106"/>
      <bbk:Obs TIME_PERIOD="2018-11-29" OBS_VALUE="-2.36208" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2018-11-28" OBS_VALUE="-2.36208" BBK_DIFF_A="0.05242"/>
      <bbk:Obs TIME_PERIOD="2018-11-27" OBS_VALUE="-2.4145" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2018-11-26" OBS_VALUE="-2.4145" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2018-11-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-11-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-11-23" OBS_VALUE="-2.4145" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2018-11-22" OBS_VALUE="-2.4145" BBK_DIFF_A="0.00755"/>
      <bbk:Obs TIME_PERIOD="2018-11-21" OBS_VALUE="-2.42205" BBK_DIFF_A="0.09044"/>
      <bbk:Obs TIME_PERIOD="2018-11-20" OBS_VALUE="-2.51249" BBK_DIFF_A="-1.0E-5"/>
      <bbk:Obs TIME_PERIOD="2018-11-19" OBS_VALUE="-2.51248" BBK_DIFF_A="-0.02202"/>
      <bbk:Obs TIME_PERIOD="2018-11-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-11-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-11-16" OBS_VALUE="-2.49046" BBK_DIFF_A="0.05193"/>
      <bbk:Obs TIME_PERIOD="2018-11-15" OBS_VALUE="-2.54239" BBK_DIFF_A="-0.03142"/>
      <bbk:Obs TIME_PERIOD="2018-11-14" OBS_VALUE="-2.51097" BBK_DIFF_A="-0.03083"/>
      <bbk:Obs TIME_PERIOD="2018-11-13" OBS_VALUE="-2.48014" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2018-11-12" OBS_VALUE="-2.48014" BBK_DIFF_A="-0.02662"/>
      <bbk:Obs TIME_PERIOD="2018-11-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-11-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-11-09" OBS_VALUE="-2.45352" BBK_DIFF_A="0.01718"/>
      <bbk:Obs TIME_PERIOD="2018-11-08" OBS_VALUE="-2.4707" BBK_DIFF_A="0.04435"/>
      <bbk:Obs TIME_PERIOD="2018-11-07" OBS_VALUE="-2.51505" BBK_DIFF_A="0.06892"/>
      <bbk:Obs TIME_PERIOD="2018-11-06" OBS_VALUE="-2.58397" BBK_DIFF_A="0.06571"/>
      <bbk:Obs TIME_PERIOD="2018-11-05" OBS_VALUE="-2.64968" BBK_DIFF_A="0.04332"/>
      <bbk:Obs TIME_PERIOD="2018-11-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-11-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-11-02" OBS_VALUE="-2.693" BBK_DIFF_A="-0.02264"/>
      <bbk:Obs TIME_PERIOD="2018-11-01" OBS_VALUE="-2.67036" BBK_DIFF_A="0.00984"/>
      <bbk:Obs TIME_PERIOD="2018-10-31" OBS_VALUE="-2.6802" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2018-10-30" OBS_VALUE="-2.6802" BBK_DIFF_A="-0.13982"/>
      <bbk:Obs TIME_PERIOD="2018-10-29" OBS_VALUE="-2.54038" BBK_DIFF_A="0.14523"/>
      <bbk:Obs TIME_PERIOD="2018-10-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-10-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-10-26" OBS_VALUE="-2.68561" BBK_DIFF_A="0.04953"/>
      <bbk:Obs TIME_PERIOD="2018-10-25" OBS_VALUE="-2.73514" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2018-10-24" OBS_VALUE="-2.73514" BBK_DIFF_A="-0.07154"/>
      <bbk:Obs TIME_PERIOD="2018-10-23" OBS_VALUE="-2.6636" BBK_DIFF_A="0.03731"/>
      <bbk:Obs TIME_PERIOD="2018-10-22" OBS_VALUE="-2.70091" BBK_DIFF_A="-0.11582"/>
      <bbk:Obs TIME_PERIOD="2018-10-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-10-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-10-19" OBS_VALUE="-2.58509" BBK_DIFF_A="-0.03086"/>
      <bbk:Obs TIME_PERIOD="2018-10-18" OBS_VALUE="-2.55423" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2018-10-17" OBS_VALUE="-2.55423" BBK_DIFF_A="-0.02463"/>
      <bbk:Obs TIME_PERIOD="2018-10-16" OBS_VALUE="-2.5296" BBK_DIFF_A="0.10131"/>
      <bbk:Obs TIME_PERIOD="2018-10-15" OBS_VALUE="-2.63091" BBK_DIFF_A="-0.09722"/>
      <bbk:Obs TIME_PERIOD="2018-10-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-10-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-10-12" OBS_VALUE="-2.53369" BBK_DIFF_A="-0.02857"/>
      <bbk:Obs TIME_PERIOD="2018-10-11" OBS_VALUE="-2.50512" BBK_DIFF_A="0.03352"/>
      <bbk:Obs TIME_PERIOD="2018-10-10" OBS_VALUE="-2.53864" BBK_DIFF_A="0.09268"/>
      <bbk:Obs TIME_PERIOD="2018-10-09" OBS_VALUE="-2.63132" BBK_DIFF_A="-0.16555"/>
      <bbk:Obs TIME_PERIOD="2018-10-08" OBS_VALUE="-2.46577" BBK_DIFF_A="-0.0244"/>
      <bbk:Obs TIME_PERIOD="2018-10-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-10-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-10-05" OBS_VALUE="-2.44137" BBK_DIFF_A="-0.10242"/>
      <bbk:Obs TIME_PERIOD="2018-10-04" OBS_VALUE="-2.33895" BBK_DIFF_A="0.25506"/>
      <bbk:Obs TIME_PERIOD="2018-10-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-10-02" OBS_VALUE="-2.59401" BBK_DIFF_A="-0.05763"/>
      <bbk:Obs TIME_PERIOD="2018-10-01" OBS_VALUE="-2.53638" BBK_DIFF_A="-0.11377"/>
      <bbk:Obs TIME_PERIOD="2018-09-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-09-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-09-28" OBS_VALUE="-2.42261" BBK_DIFF_A="0.12202"/>
      <bbk:Obs TIME_PERIOD="2018-09-27" OBS_VALUE="-2.54463" BBK_DIFF_A="0.0477"/>
      <bbk:Obs TIME_PERIOD="2018-09-26" OBS_VALUE="-2.59233" BBK_DIFF_A="-0.08397"/>
      <bbk:Obs TIME_PERIOD="2018-09-25" OBS_VALUE="-2.50836" BBK_DIFF_A="-0.0874"/>
      <bbk:Obs TIME_PERIOD="2018-09-24" OBS_VALUE="-2.42096" BBK_DIFF_A="-0.10432"/>
      <bbk:Obs TIME_PERIOD="2018-09-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-09-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-09-21" OBS_VALUE="-2.31664" BBK_DIFF_A="-0.08899"/>
      <bbk:Obs TIME_PERIOD="2018-09-20" OBS_VALUE="-2.22765" BBK_DIFF_A="-0.0642"/>
      <bbk:Obs TIME_PERIOD="2018-09-19" OBS_VALUE="-2.16345" BBK_DIFF_A="-0.07745"/>
      <bbk:Obs TIME_PERIOD="2018-09-18" OBS_VALUE="-2.086" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2018-09-17" OBS_VALUE="-2.086" BBK_DIFF_A="-0.00841"/>
      <bbk:Obs TIME_PERIOD="2018-09-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-09-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-09-14" OBS_VALUE="-2.07759" BBK_DIFF_A="-0.02624"/>
      <bbk:Obs TIME_PERIOD="2018-09-13" OBS_VALUE="-2.05135" BBK_DIFF_A="9.3E-4"/>
      <bbk:Obs TIME_PERIOD="2018-09-12" OBS_VALUE="-2.05228" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2018-09-11" OBS_VALUE="-2.05228" BBK_DIFF_A="-0.07449"/>
      <bbk:Obs TIME_PERIOD="2018-09-10" OBS_VALUE="-1.97779" BBK_DIFF_A="-0.08112"/>
      <bbk:Obs TIME_PERIOD="2018-09-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-09-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-09-07" OBS_VALUE="-1.89667" BBK_DIFF_A="-0.03832"/>
      <bbk:Obs TIME_PERIOD="2018-09-06" OBS_VALUE="-1.85835" BBK_DIFF_A="0.08071"/>
      <bbk:Obs TIME_PERIOD="2018-09-05" OBS_VALUE="-1.93906" BBK_DIFF_A="-0.01113"/>
      <bbk:Obs TIME_PERIOD="2018-09-04" OBS_VALUE="-1.92793" BBK_DIFF_A="-0.01805"/>
      <bbk:Obs TIME_PERIOD="2018-09-03" OBS_VALUE="-1.90988" BBK_DIFF_A="-0.01662"/>
      <bbk:Obs TIME_PERIOD="2018-09-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-09-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-08-31" OBS_VALUE="-1.89326" BBK_DIFF_A="0.04662"/>
      <bbk:Obs TIME_PERIOD="2018-08-30" OBS_VALUE="-1.93988" BBK_DIFF_A="-0.00867"/>
      <bbk:Obs TIME_PERIOD="2018-08-29" OBS_VALUE="-1.93121" BBK_DIFF_A="-0.05502"/>
      <bbk:Obs TIME_PERIOD="2018-08-28" OBS_VALUE="-1.87619" BBK_DIFF_A="-0.03711"/>
      <bbk:Obs TIME_PERIOD="2018-08-27" OBS_VALUE="-1.83908" BBK_DIFF_A="0.01015"/>
      <bbk:Obs TIME_PERIOD="2018-08-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-08-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-08-24" OBS_VALUE="-1.84923" BBK_DIFF_A="-0.1096"/>
      <bbk:Obs TIME_PERIOD="2018-08-23" OBS_VALUE="-1.73963" BBK_DIFF_A="-0.10755"/>
      <bbk:Obs TIME_PERIOD="2018-08-22" OBS_VALUE="-1.63208" BBK_DIFF_A="0.07839"/>
      <bbk:Obs TIME_PERIOD="2018-08-21" OBS_VALUE="-1.71047" BBK_DIFF_A="-0.11301"/>
      <bbk:Obs TIME_PERIOD="2018-08-20" OBS_VALUE="-1.59746" BBK_DIFF_A="0.09152"/>
      <bbk:Obs TIME_PERIOD="2018-08-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-08-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-08-17" OBS_VALUE="-1.68898" BBK_DIFF_A="0.03606"/>
      <bbk:Obs TIME_PERIOD="2018-08-16" OBS_VALUE="-1.72504" BBK_DIFF_A="-0.01122"/>
      <bbk:Obs TIME_PERIOD="2018-08-15" OBS_VALUE="-1.71382" BBK_DIFF_A="0.04878"/>
      <bbk:Obs TIME_PERIOD="2018-08-14" OBS_VALUE="-1.7626" BBK_DIFF_A="0.2385"/>
      <bbk:Obs TIME_PERIOD="2018-08-13" OBS_VALUE="-2.0011" BBK_DIFF_A="0.03374"/>
      <bbk:Obs TIME_PERIOD="2018-08-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-08-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-08-10" OBS_VALUE="-2.03484" BBK_DIFF_A="-0.01899"/>
      <bbk:Obs TIME_PERIOD="2018-08-09" OBS_VALUE="-2.01585" BBK_DIFF_A="0.02914"/>
      <bbk:Obs TIME_PERIOD="2018-08-08" OBS_VALUE="-2.04499" BBK_DIFF_A="-0.02316"/>
      <bbk:Obs TIME_PERIOD="2018-08-07" OBS_VALUE="-2.02183" BBK_DIFF_A="-0.00311"/>
      <bbk:Obs TIME_PERIOD="2018-08-06" OBS_VALUE="-2.01872" BBK_DIFF_A="0.03386"/>
      <bbk:Obs TIME_PERIOD="2018-08-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-08-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-08-03" OBS_VALUE="-2.05258" BBK_DIFF_A="0.05418"/>
      <bbk:Obs TIME_PERIOD="2018-08-02" OBS_VALUE="-2.10676" BBK_DIFF_A="0.06638"/>
      <bbk:Obs TIME_PERIOD="2018-08-01" OBS_VALUE="-2.17314" BBK_DIFF_A="-0.01537"/>
      <bbk:Obs TIME_PERIOD="2018-07-31" OBS_VALUE="-2.15777" BBK_DIFF_A="-0.0027"/>
      <bbk:Obs TIME_PERIOD="2018-07-30" OBS_VALUE="-2.15507" BBK_DIFF_A="-0.03147"/>
      <bbk:Obs TIME_PERIOD="2018-07-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-07-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-07-27" OBS_VALUE="-2.1236" BBK_DIFF_A="-0.0215"/>
      <bbk:Obs TIME_PERIOD="2018-07-26" OBS_VALUE="-2.1021" BBK_DIFF_A="-0.02351"/>
      <bbk:Obs TIME_PERIOD="2018-07-25" OBS_VALUE="-2.07859" BBK_DIFF_A="0.03126"/>
      <bbk:Obs TIME_PERIOD="2018-07-24" OBS_VALUE="-2.10985" BBK_DIFF_A="0.04076"/>
      <bbk:Obs TIME_PERIOD="2018-07-23" OBS_VALUE="-2.15061" BBK_DIFF_A="-0.00568"/>
      <bbk:Obs TIME_PERIOD="2018-07-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-07-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-07-20" OBS_VALUE="-2.14493" BBK_DIFF_A="-0.0102"/>
      <bbk:Obs TIME_PERIOD="2018-07-19" OBS_VALUE="-2.13473" BBK_DIFF_A="-0.00207"/>
      <bbk:Obs TIME_PERIOD="2018-07-18" OBS_VALUE="-2.13266" BBK_DIFF_A="0.00341"/>
      <bbk:Obs TIME_PERIOD="2018-07-17" OBS_VALUE="-2.13607" BBK_DIFF_A="-0.00261"/>
      <bbk:Obs TIME_PERIOD="2018-07-16" OBS_VALUE="-2.13346" BBK_DIFF_A="-0.03923"/>
      <bbk:Obs TIME_PERIOD="2018-07-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-07-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-07-13" OBS_VALUE="-2.09423" BBK_DIFF_A="0.0177"/>
      <bbk:Obs TIME_PERIOD="2018-07-12" OBS_VALUE="-2.11193" BBK_DIFF_A="-0.02609"/>
      <bbk:Obs TIME_PERIOD="2018-07-11" OBS_VALUE="-2.08584" BBK_DIFF_A="0.02539"/>
      <bbk:Obs TIME_PERIOD="2018-07-10" OBS_VALUE="-2.11123" BBK_DIFF_A="-0.00572"/>
      <bbk:Obs TIME_PERIOD="2018-07-09" OBS_VALUE="-2.10551" BBK_DIFF_A="-0.01906"/>
      <bbk:Obs TIME_PERIOD="2018-07-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-07-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-07-06" OBS_VALUE="-2.08645" BBK_DIFF_A="-0.00471"/>
      <bbk:Obs TIME_PERIOD="2018-07-05" OBS_VALUE="-2.08174" BBK_DIFF_A="-0.02445"/>
      <bbk:Obs TIME_PERIOD="2018-07-04" OBS_VALUE="-2.05729" BBK_DIFF_A="0.02985"/>
      <bbk:Obs TIME_PERIOD="2018-07-03" OBS_VALUE="-2.08714" BBK_DIFF_A="-0.01166"/>
      <bbk:Obs TIME_PERIOD="2018-07-02" OBS_VALUE="-2.07548" BBK_DIFF_A="0.04118"/>
      <bbk:Obs TIME_PERIOD="2018-07-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-06-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-06-29" OBS_VALUE="-2.11666" BBK_DIFF_A="0.17146"/>
      <bbk:Obs TIME_PERIOD="2018-06-28" OBS_VALUE="-2.28812" BBK_DIFF_A="-0.05458"/>
      <bbk:Obs TIME_PERIOD="2018-06-27" OBS_VALUE="-2.23354" BBK_DIFF_A="0.04486"/>
      <bbk:Obs TIME_PERIOD="2018-06-26" OBS_VALUE="-2.2784" BBK_DIFF_A="-0.03156"/>
      <bbk:Obs TIME_PERIOD="2018-06-25" OBS_VALUE="-2.24684" BBK_DIFF_A="0.00962"/>
      <bbk:Obs TIME_PERIOD="2018-06-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-06-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-06-22" OBS_VALUE="-2.25646" BBK_DIFF_A="-0.02608"/>
      <bbk:Obs TIME_PERIOD="2018-06-21" OBS_VALUE="-2.23038" BBK_DIFF_A="-0.00551"/>
      <bbk:Obs TIME_PERIOD="2018-06-20" OBS_VALUE="-2.22487" BBK_DIFF_A="0.04699"/>
      <bbk:Obs TIME_PERIOD="2018-06-19" OBS_VALUE="-2.27186" BBK_DIFF_A="-0.03423"/>
      <bbk:Obs TIME_PERIOD="2018-06-18" OBS_VALUE="-2.23763" BBK_DIFF_A="-0.06935"/>
      <bbk:Obs TIME_PERIOD="2018-06-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-06-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-06-15" OBS_VALUE="-2.16828" BBK_DIFF_A="0.0487"/>
      <bbk:Obs TIME_PERIOD="2018-06-14" OBS_VALUE="-2.21698" BBK_DIFF_A="-0.04232"/>
      <bbk:Obs TIME_PERIOD="2018-06-13" OBS_VALUE="-2.17466" BBK_DIFF_A="0.02579"/>
      <bbk:Obs TIME_PERIOD="2018-06-12" OBS_VALUE="-2.20045" BBK_DIFF_A="-0.05759"/>
      <bbk:Obs TIME_PERIOD="2018-06-11" OBS_VALUE="-2.14286" BBK_DIFF_A="-0.03389"/>
      <bbk:Obs TIME_PERIOD="2018-06-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-06-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-06-08" OBS_VALUE="-2.10897" BBK_DIFF_A="0.02459"/>
      <bbk:Obs TIME_PERIOD="2018-06-07" OBS_VALUE="-2.13356" BBK_DIFF_A="-0.07026"/>
      <bbk:Obs TIME_PERIOD="2018-06-06" OBS_VALUE="-2.0633" BBK_DIFF_A="-0.09444"/>
      <bbk:Obs TIME_PERIOD="2018-06-05" OBS_VALUE="-1.96886" BBK_DIFF_A="0.1414"/>
      <bbk:Obs TIME_PERIOD="2018-06-04" OBS_VALUE="-2.11026" BBK_DIFF_A="-0.01061"/>
      <bbk:Obs TIME_PERIOD="2018-06-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-06-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-06-01" OBS_VALUE="-2.09965" BBK_DIFF_A="0.03353"/>
      <bbk:Obs TIME_PERIOD="2018-05-31" OBS_VALUE="-2.13318" BBK_DIFF_A="-0.08227"/>
      <bbk:Obs TIME_PERIOD="2018-05-30" OBS_VALUE="-2.05091" BBK_DIFF_A="-0.07494"/>
      <bbk:Obs TIME_PERIOD="2018-05-29" OBS_VALUE="-1.97597" BBK_DIFF_A="0.18378"/>
      <bbk:Obs TIME_PERIOD="2018-05-28" OBS_VALUE="-2.15975" BBK_DIFF_A="0.0115"/>
      <bbk:Obs TIME_PERIOD="2018-05-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-05-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-05-25" OBS_VALUE="-2.17125" BBK_DIFF_A="0.17733"/>
      <bbk:Obs TIME_PERIOD="2018-05-24" OBS_VALUE="-2.34858" BBK_DIFF_A="-0.07954"/>
      <bbk:Obs TIME_PERIOD="2018-05-23" OBS_VALUE="-2.26904" BBK_DIFF_A="0.00247"/>
      <bbk:Obs TIME_PERIOD="2018-05-22" OBS_VALUE="-2.27151" BBK_DIFF_A="0.09496"/>
      <bbk:Obs TIME_PERIOD="2018-05-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-05-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-05-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-05-18" OBS_VALUE="-2.36647" BBK_DIFF_A="-0.01496"/>
      <bbk:Obs TIME_PERIOD="2018-05-17" OBS_VALUE="-2.35151" BBK_DIFF_A="-0.03056"/>
      <bbk:Obs TIME_PERIOD="2018-05-16" OBS_VALUE="-2.32095" BBK_DIFF_A="-0.11056"/>
      <bbk:Obs TIME_PERIOD="2018-05-15" OBS_VALUE="-2.21039" BBK_DIFF_A="0.00335"/>
      <bbk:Obs TIME_PERIOD="2018-05-14" OBS_VALUE="-2.21374" BBK_DIFF_A="0.02585"/>
      <bbk:Obs TIME_PERIOD="2018-05-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-05-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-05-11" OBS_VALUE="-2.23959" BBK_DIFF_A="0.03238"/>
      <bbk:Obs TIME_PERIOD="2018-05-10" OBS_VALUE="-2.27197" BBK_DIFF_A="0.01492"/>
      <bbk:Obs TIME_PERIOD="2018-05-09" OBS_VALUE="-2.28689" BBK_DIFF_A="-0.05654"/>
      <bbk:Obs TIME_PERIOD="2018-05-08" OBS_VALUE="-2.23035" BBK_DIFF_A="0.02531"/>
      <bbk:Obs TIME_PERIOD="2018-05-07" OBS_VALUE="-2.25566" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2018-05-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-05-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-05-04" OBS_VALUE="-2.25566" BBK_DIFF_A="0.06003"/>
      <bbk:Obs TIME_PERIOD="2018-05-03" OBS_VALUE="-2.31569" BBK_DIFF_A="0.01069"/>
      <bbk:Obs TIME_PERIOD="2018-05-02" OBS_VALUE="-2.32638" BBK_DIFF_A="-0.01772"/>
      <bbk:Obs TIME_PERIOD="2018-05-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-04-30" OBS_VALUE="-2.30866" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2018-04-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-04-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-04-27" OBS_VALUE="-2.30866" BBK_DIFF_A="0.04321"/>
      <bbk:Obs TIME_PERIOD="2018-04-26" OBS_VALUE="-2.35187" BBK_DIFF_A="0.01275"/>
      <bbk:Obs TIME_PERIOD="2018-04-25" OBS_VALUE="-2.36462" BBK_DIFF_A="0.3795"/>
      <bbk:Obs TIME_PERIOD="2018-04-24" OBS_VALUE="-2.74412" BBK_DIFF_A="-0.3371"/>
      <bbk:Obs TIME_PERIOD="2018-04-23" OBS_VALUE="-2.40702" BBK_DIFF_A="-0.00302"/>
      <bbk:Obs TIME_PERIOD="2018-04-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-04-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-04-20" OBS_VALUE="-2.404" BBK_DIFF_A="0.00251"/>
      <bbk:Obs TIME_PERIOD="2018-04-19" OBS_VALUE="-2.40651" BBK_DIFF_A="-0.11966"/>
      <bbk:Obs TIME_PERIOD="2018-04-18" OBS_VALUE="-2.28685" BBK_DIFF_A="0.03223"/>
      <bbk:Obs TIME_PERIOD="2018-04-17" OBS_VALUE="-2.31908" BBK_DIFF_A="0.00571"/>
      <bbk:Obs TIME_PERIOD="2018-04-16" OBS_VALUE="-2.32479" BBK_DIFF_A="-0.0054"/>
      <bbk:Obs TIME_PERIOD="2018-04-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-04-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-04-13" OBS_VALUE="-2.31939" BBK_DIFF_A="-0.0833"/>
      <bbk:Obs TIME_PERIOD="2018-04-12" OBS_VALUE="-2.23609" BBK_DIFF_A="0.01849"/>
      <bbk:Obs TIME_PERIOD="2018-04-11" OBS_VALUE="-2.25458" BBK_DIFF_A="-0.04474"/>
      <bbk:Obs TIME_PERIOD="2018-04-10" OBS_VALUE="-2.20984" BBK_DIFF_A="0.04834"/>
      <bbk:Obs TIME_PERIOD="2018-04-09" OBS_VALUE="-2.25818" BBK_DIFF_A="-0.01328"/>
      <bbk:Obs TIME_PERIOD="2018-04-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-04-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-04-06" OBS_VALUE="-2.2449" BBK_DIFF_A="0.02126"/>
      <bbk:Obs TIME_PERIOD="2018-04-05" OBS_VALUE="-2.26616" BBK_DIFF_A="-0.05931"/>
      <bbk:Obs TIME_PERIOD="2018-04-04" OBS_VALUE="-2.20685" BBK_DIFF_A="0.04506"/>
      <bbk:Obs TIME_PERIOD="2018-04-03" OBS_VALUE="-2.25191" BBK_DIFF_A="0.00571"/>
      <bbk:Obs TIME_PERIOD="2018-04-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-04-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-03-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-03-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-03-29" OBS_VALUE="-2.25762" BBK_DIFF_A="0.11956"/>
      <bbk:Obs TIME_PERIOD="2018-03-28" OBS_VALUE="-2.37718" BBK_DIFF_A="0.02173"/>
      <bbk:Obs TIME_PERIOD="2018-03-27" OBS_VALUE="-2.39891" BBK_DIFF_A="-0.12259"/>
      <bbk:Obs TIME_PERIOD="2018-03-26" OBS_VALUE="-2.27632" BBK_DIFF_A="-0.03282"/>
      <bbk:Obs TIME_PERIOD="2018-03-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-03-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-03-23" OBS_VALUE="-2.2435" BBK_DIFF_A="0.02045"/>
      <bbk:Obs TIME_PERIOD="2018-03-22" OBS_VALUE="-2.26395" BBK_DIFF_A="0.02238"/>
      <bbk:Obs TIME_PERIOD="2018-03-21" OBS_VALUE="-2.28633" BBK_DIFF_A="0.01274"/>
      <bbk:Obs TIME_PERIOD="2018-03-20" OBS_VALUE="-2.29907" BBK_DIFF_A="-0.9738"/>
      <bbk:Obs TIME_PERIOD="2018-03-19" OBS_VALUE="-1.32527" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2018-03-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-03-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-03-16" OBS_VALUE="-1.32527" BBK_DIFF_A="0.24715"/>
      <bbk:Obs TIME_PERIOD="2018-03-15" OBS_VALUE="-1.57242" BBK_DIFF_A="0.77924"/>
      <bbk:Obs TIME_PERIOD="2018-03-14" OBS_VALUE="-2.35166" BBK_DIFF_A="0.0499"/>
      <bbk:Obs TIME_PERIOD="2018-03-13" OBS_VALUE="-2.40156" BBK_DIFF_A="0.00212"/>
      <bbk:Obs TIME_PERIOD="2018-03-12" OBS_VALUE="-2.40368" BBK_DIFF_A="-0.00963"/>
      <bbk:Obs TIME_PERIOD="2018-03-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-03-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-03-09" OBS_VALUE="-2.39405" BBK_DIFF_A="0.02073"/>
      <bbk:Obs TIME_PERIOD="2018-03-08" OBS_VALUE="-2.41478" BBK_DIFF_A="0.01622"/>
      <bbk:Obs TIME_PERIOD="2018-03-07" OBS_VALUE="-2.431" BBK_DIFF_A="-0.06078"/>
      <bbk:Obs TIME_PERIOD="2018-03-06" OBS_VALUE="-2.37022" BBK_DIFF_A="-1.56187"/>
      <bbk:Obs TIME_PERIOD="2018-03-05" OBS_VALUE="-0.80835" BBK_DIFF_A="0.08688"/>
      <bbk:Obs TIME_PERIOD="2018-03-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-03-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-03-02" OBS_VALUE="-0.89523" BBK_DIFF_A="-0.01798"/>
      <bbk:Obs TIME_PERIOD="2018-03-01" OBS_VALUE="-0.87725" BBK_DIFF_A="0.10888"/>
      <bbk:Obs TIME_PERIOD="2018-02-28" OBS_VALUE="-0.98613" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2018-02-27" OBS_VALUE="-0.98613" BBK_DIFF_A="-0.01839"/>
      <bbk:Obs TIME_PERIOD="2018-02-26" OBS_VALUE="-0.96774" BBK_DIFF_A="-0.10954"/>
      <bbk:Obs TIME_PERIOD="2018-02-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-02-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-02-23" OBS_VALUE="-0.8582" BBK_DIFF_A="0.33841"/>
      <bbk:Obs TIME_PERIOD="2018-02-22" OBS_VALUE="-1.19661" BBK_DIFF_A="-0.3611"/>
      <bbk:Obs TIME_PERIOD="2018-02-21" OBS_VALUE="-0.83551" BBK_DIFF_A="0.16282"/>
      <bbk:Obs TIME_PERIOD="2018-02-20" OBS_VALUE="-0.99833" BBK_DIFF_A="0.01117"/>
      <bbk:Obs TIME_PERIOD="2018-02-19" OBS_VALUE="-1.0095" BBK_DIFF_A="0.17172"/>
      <bbk:Obs TIME_PERIOD="2018-02-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-02-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-02-16" OBS_VALUE="-1.18122" BBK_DIFF_A="0.00105"/>
      <bbk:Obs TIME_PERIOD="2018-02-15" OBS_VALUE="-1.18227" BBK_DIFF_A="-0.1778"/>
      <bbk:Obs TIME_PERIOD="2018-02-14" OBS_VALUE="-1.00447" BBK_DIFF_A="0.29891"/>
      <bbk:Obs TIME_PERIOD="2018-02-13" OBS_VALUE="-1.30338" BBK_DIFF_A="0.23694"/>
      <bbk:Obs TIME_PERIOD="2018-02-12" OBS_VALUE="-1.54032" BBK_DIFF_A="0.78413"/>
      <bbk:Obs TIME_PERIOD="2018-02-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-02-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-02-09" OBS_VALUE="-2.32445" BBK_DIFF_A="0.02875"/>
      <bbk:Obs TIME_PERIOD="2018-02-08" OBS_VALUE="-2.3532" BBK_DIFF_A="-0.05579"/>
      <bbk:Obs TIME_PERIOD="2018-02-07" OBS_VALUE="-2.29741" BBK_DIFF_A="-0.00358"/>
      <bbk:Obs TIME_PERIOD="2018-02-06" OBS_VALUE="-2.29383" BBK_DIFF_A="0.01372"/>
      <bbk:Obs TIME_PERIOD="2018-02-05" OBS_VALUE="-2.30755" BBK_DIFF_A="-0.023"/>
      <bbk:Obs TIME_PERIOD="2018-02-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-02-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-02-02" OBS_VALUE="-2.28455" BBK_DIFF_A="-0.01351"/>
      <bbk:Obs TIME_PERIOD="2018-02-01" OBS_VALUE="-2.27104" BBK_DIFF_A="-0.00779"/>
      <bbk:Obs TIME_PERIOD="2018-01-31" OBS_VALUE="-2.26325" BBK_DIFF_A="0.06318"/>
      <bbk:Obs TIME_PERIOD="2018-01-30" OBS_VALUE="-2.32643" BBK_DIFF_A="-0.04866"/>
      <bbk:Obs TIME_PERIOD="2018-01-29" OBS_VALUE="-2.27777" BBK_DIFF_A="-0.0446"/>
      <bbk:Obs TIME_PERIOD="2018-01-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-01-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-01-26" OBS_VALUE="-2.23317" BBK_DIFF_A="0.06075"/>
      <bbk:Obs TIME_PERIOD="2018-01-25" OBS_VALUE="-2.29392" BBK_DIFF_A="-0.04033"/>
      <bbk:Obs TIME_PERIOD="2018-01-24" OBS_VALUE="-2.25359" BBK_DIFF_A="-0.02687"/>
      <bbk:Obs TIME_PERIOD="2018-01-23" OBS_VALUE="-2.22672" BBK_DIFF_A="0.06257"/>
      <bbk:Obs TIME_PERIOD="2018-01-22" OBS_VALUE="-2.28929" BBK_DIFF_A="-0.00409"/>
      <bbk:Obs TIME_PERIOD="2018-01-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-01-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-01-19" OBS_VALUE="-2.2852" BBK_DIFF_A="0.05654"/>
      <bbk:Obs TIME_PERIOD="2018-01-18" OBS_VALUE="-2.34174" BBK_DIFF_A="-0.06053"/>
      <bbk:Obs TIME_PERIOD="2018-01-17" OBS_VALUE="-2.28121" BBK_DIFF_A="-0.12401"/>
      <bbk:Obs TIME_PERIOD="2018-01-16" OBS_VALUE="-2.1572" BBK_DIFF_A="0.3424"/>
      <bbk:Obs TIME_PERIOD="2018-01-15" OBS_VALUE="-2.4996" BBK_DIFF_A="-0.03298"/>
      <bbk:Obs TIME_PERIOD="2018-01-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-01-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-01-12" OBS_VALUE="-2.46662" BBK_DIFF_A="0.04019"/>
      <bbk:Obs TIME_PERIOD="2018-01-11" OBS_VALUE="-2.50681" BBK_DIFF_A="0.01876"/>
      <bbk:Obs TIME_PERIOD="2018-01-10" OBS_VALUE="-2.52557" BBK_DIFF_A="0.08788"/>
      <bbk:Obs TIME_PERIOD="2018-01-09" OBS_VALUE="-2.61345" BBK_DIFF_A="0.03242"/>
      <bbk:Obs TIME_PERIOD="2018-01-08" OBS_VALUE="-2.64587" BBK_DIFF_A="-0.07385"/>
      <bbk:Obs TIME_PERIOD="2018-01-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-01-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-01-05" OBS_VALUE="-2.57202" BBK_DIFF_A="0.15732"/>
      <bbk:Obs TIME_PERIOD="2018-01-04" OBS_VALUE="-2.72934" BBK_DIFF_A="0.05593"/>
      <bbk:Obs TIME_PERIOD="2018-01-03" OBS_VALUE="-2.78527" BBK_DIFF_A="0.14284"/>
      <bbk:Obs TIME_PERIOD="2018-01-02" OBS_VALUE="-2.92811" BBK_DIFF_A="0.07052"/>
      <bbk:Obs TIME_PERIOD="2018-01-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-12-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-12-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-12-29" OBS_VALUE="-2.99863" BBK_DIFF_A="-0.02161"/>
      <bbk:Obs TIME_PERIOD="2017-12-28" OBS_VALUE="-2.97702" BBK_DIFF_A="0.02357"/>
      <bbk:Obs TIME_PERIOD="2017-12-27" OBS_VALUE="-3.00059" BBK_DIFF_A="0.01018"/>
      <bbk:Obs TIME_PERIOD="2017-12-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-12-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-12-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-12-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-12-22" OBS_VALUE="-3.01077" BBK_DIFF_A="0.0525"/>
      <bbk:Obs TIME_PERIOD="2017-12-21" OBS_VALUE="-3.06327" BBK_DIFF_A="0.05463"/>
      <bbk:Obs TIME_PERIOD="2017-12-20" OBS_VALUE="-3.1179" BBK_DIFF_A="-0.10384"/>
      <bbk:Obs TIME_PERIOD="2017-12-19" OBS_VALUE="-3.01406" BBK_DIFF_A="-0.13055"/>
      <bbk:Obs TIME_PERIOD="2017-12-18" OBS_VALUE="-2.88351" BBK_DIFF_A="-0.04148"/>
      <bbk:Obs TIME_PERIOD="2017-12-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-12-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-12-15" OBS_VALUE="-2.84203" BBK_DIFF_A="0.08364"/>
      <bbk:Obs TIME_PERIOD="2017-12-14" OBS_VALUE="-2.92567" BBK_DIFF_A="0.04363"/>
      <bbk:Obs TIME_PERIOD="2017-12-13" OBS_VALUE="-2.9693" BBK_DIFF_A="-0.14186"/>
      <bbk:Obs TIME_PERIOD="2017-12-12" OBS_VALUE="-2.82744" BBK_DIFF_A="-0.10092"/>
      <bbk:Obs TIME_PERIOD="2017-12-11" OBS_VALUE="-2.72652" BBK_DIFF_A="-0.00878"/>
      <bbk:Obs TIME_PERIOD="2017-12-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-12-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-12-08" OBS_VALUE="-2.71774" BBK_DIFF_A="-0.08521"/>
      <bbk:Obs TIME_PERIOD="2017-12-07" OBS_VALUE="-2.63253" BBK_DIFF_A="0.00259"/>
      <bbk:Obs TIME_PERIOD="2017-12-06" OBS_VALUE="-2.63512" BBK_DIFF_A="-0.12599"/>
      <bbk:Obs TIME_PERIOD="2017-12-05" OBS_VALUE="-2.50913" BBK_DIFF_A="-0.32639"/>
      <bbk:Obs TIME_PERIOD="2017-12-04" OBS_VALUE="-2.18274" BBK_DIFF_A="-0.00375"/>
      <bbk:Obs TIME_PERIOD="2017-12-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-12-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-12-01" OBS_VALUE="-2.17899" BBK_DIFF_A="0.06898"/>
      <bbk:Obs TIME_PERIOD="2017-11-30" OBS_VALUE="-2.24797" BBK_DIFF_A="-0.06412"/>
      <bbk:Obs TIME_PERIOD="2017-11-29" OBS_VALUE="-2.18385" BBK_DIFF_A="-0.0082"/>
      <bbk:Obs TIME_PERIOD="2017-11-28" OBS_VALUE="-2.17565" BBK_DIFF_A="0.03577"/>
      <bbk:Obs TIME_PERIOD="2017-11-27" OBS_VALUE="-2.21142" BBK_DIFF_A="0.01351"/>
      <bbk:Obs TIME_PERIOD="2017-11-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-11-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-11-24" OBS_VALUE="-2.22493" BBK_DIFF_A="-0.02371"/>
      <bbk:Obs TIME_PERIOD="2017-11-23" OBS_VALUE="-2.20122" BBK_DIFF_A="0.03649"/>
      <bbk:Obs TIME_PERIOD="2017-11-22" OBS_VALUE="-2.23771" BBK_DIFF_A="-0.01512"/>
      <bbk:Obs TIME_PERIOD="2017-11-21" OBS_VALUE="-2.22259" BBK_DIFF_A="0.06258"/>
      <bbk:Obs TIME_PERIOD="2017-11-20" OBS_VALUE="-2.28517" BBK_DIFF_A="0.04168"/>
      <bbk:Obs TIME_PERIOD="2017-11-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-11-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-11-17" OBS_VALUE="-2.32685" BBK_DIFF_A="0.00359"/>
      <bbk:Obs TIME_PERIOD="2017-11-16" OBS_VALUE="-2.33044" BBK_DIFF_A="-0.0214"/>
      <bbk:Obs TIME_PERIOD="2017-11-15" OBS_VALUE="-2.30904" BBK_DIFF_A="0.07824"/>
      <bbk:Obs TIME_PERIOD="2017-11-14" OBS_VALUE="-2.38728" BBK_DIFF_A="-0.00574"/>
      <bbk:Obs TIME_PERIOD="2017-11-13" OBS_VALUE="-2.38154" BBK_DIFF_A="-0.00509"/>
      <bbk:Obs TIME_PERIOD="2017-11-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-11-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-11-10" OBS_VALUE="-2.37645" BBK_DIFF_A="-0.07395"/>
      <bbk:Obs TIME_PERIOD="2017-11-09" OBS_VALUE="-2.3025" BBK_DIFF_A="-1.2E-4"/>
      <bbk:Obs TIME_PERIOD="2017-11-08" OBS_VALUE="-2.30238" BBK_DIFF_A="0.01304"/>
      <bbk:Obs TIME_PERIOD="2017-11-07" OBS_VALUE="-2.31542" BBK_DIFF_A="-0.00538"/>
      <bbk:Obs TIME_PERIOD="2017-11-06" OBS_VALUE="-2.31004" BBK_DIFF_A="0.01666"/>
      <bbk:Obs TIME_PERIOD="2017-11-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-11-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-11-03" OBS_VALUE="-2.3267" BBK_DIFF_A="0.02561"/>
      <bbk:Obs TIME_PERIOD="2017-11-02" OBS_VALUE="-2.35231" BBK_DIFF_A="-0.04429"/>
      <bbk:Obs TIME_PERIOD="2017-11-01" OBS_VALUE="-2.30802" BBK_DIFF_A="0.03585"/>
      <bbk:Obs TIME_PERIOD="2017-10-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-10-30" OBS_VALUE="-2.34387" BBK_DIFF_A="0.02379"/>
      <bbk:Obs TIME_PERIOD="2017-10-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-10-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-10-27" OBS_VALUE="-2.36766" BBK_DIFF_A="0.04853"/>
      <bbk:Obs TIME_PERIOD="2017-10-26" OBS_VALUE="-2.41619" BBK_DIFF_A="0.00207"/>
      <bbk:Obs TIME_PERIOD="2017-10-25" OBS_VALUE="-2.41826" BBK_DIFF_A="-0.0082"/>
      <bbk:Obs TIME_PERIOD="2017-10-24" OBS_VALUE="-2.41006" BBK_DIFF_A="-0.02887"/>
      <bbk:Obs TIME_PERIOD="2017-10-23" OBS_VALUE="-2.38119" BBK_DIFF_A="0.02982"/>
      <bbk:Obs TIME_PERIOD="2017-10-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-10-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-10-20" OBS_VALUE="-2.41101" BBK_DIFF_A="-0.08226"/>
      <bbk:Obs TIME_PERIOD="2017-10-19" OBS_VALUE="-2.32875" BBK_DIFF_A="-0.03286"/>
      <bbk:Obs TIME_PERIOD="2017-10-18" OBS_VALUE="-2.29589" BBK_DIFF_A="-0.02099"/>
      <bbk:Obs TIME_PERIOD="2017-10-17" OBS_VALUE="-2.2749" BBK_DIFF_A="0.03065"/>
      <bbk:Obs TIME_PERIOD="2017-10-16" OBS_VALUE="-2.30555" BBK_DIFF_A="-0.02418"/>
      <bbk:Obs TIME_PERIOD="2017-10-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-10-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-10-13" OBS_VALUE="-2.28137" BBK_DIFF_A="0.06017"/>
      <bbk:Obs TIME_PERIOD="2017-10-12" OBS_VALUE="-2.34154" BBK_DIFF_A="0.00768"/>
      <bbk:Obs TIME_PERIOD="2017-10-11" OBS_VALUE="-2.34922" BBK_DIFF_A="0.21348"/>
      <bbk:Obs TIME_PERIOD="2017-10-10" OBS_VALUE="-2.5627" BBK_DIFF_A="0.03577"/>
      <bbk:Obs TIME_PERIOD="2017-10-09" OBS_VALUE="-2.59847" BBK_DIFF_A="0.02003"/>
      <bbk:Obs TIME_PERIOD="2017-10-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-10-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-10-06" OBS_VALUE="-2.6185" BBK_DIFF_A="-0.02413"/>
      <bbk:Obs TIME_PERIOD="2017-10-05" OBS_VALUE="-2.59437" BBK_DIFF_A="-0.26025"/>
      <bbk:Obs TIME_PERIOD="2017-10-04" OBS_VALUE="-2.33412" BBK_DIFF_A="-0.00601"/>
      <bbk:Obs TIME_PERIOD="2017-10-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-10-02" OBS_VALUE="-2.32811" BBK_DIFF_A="0.01189"/>
      <bbk:Obs TIME_PERIOD="2017-10-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-09-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-09-29" OBS_VALUE="-2.34" BBK_DIFF_A="0.07815"/>
      <bbk:Obs TIME_PERIOD="2017-09-28" OBS_VALUE="-2.41815" BBK_DIFF_A="-0.01386"/>
      <bbk:Obs TIME_PERIOD="2017-09-27" OBS_VALUE="-2.40429" BBK_DIFF_A="0.36556"/>
      <bbk:Obs TIME_PERIOD="2017-09-26" OBS_VALUE="-2.76985" BBK_DIFF_A="-0.05963"/>
      <bbk:Obs TIME_PERIOD="2017-09-25" OBS_VALUE="-2.71022" BBK_DIFF_A="0.11969"/>
      <bbk:Obs TIME_PERIOD="2017-09-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-09-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-09-22" OBS_VALUE="-2.82991" BBK_DIFF_A="-0.0222"/>
      <bbk:Obs TIME_PERIOD="2017-09-21" OBS_VALUE="-2.80771" BBK_DIFF_A="-0.06952"/>
      <bbk:Obs TIME_PERIOD="2017-09-20" OBS_VALUE="-2.73819" BBK_DIFF_A="0.07951"/>
      <bbk:Obs TIME_PERIOD="2017-09-19" OBS_VALUE="-2.8177" BBK_DIFF_A="0.03798"/>
      <bbk:Obs TIME_PERIOD="2017-09-18" OBS_VALUE="-2.85568" BBK_DIFF_A="-0.16074"/>
      <bbk:Obs TIME_PERIOD="2017-09-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-09-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-09-15" OBS_VALUE="-2.69494" BBK_DIFF_A="-0.04851"/>
      <bbk:Obs TIME_PERIOD="2017-09-14" OBS_VALUE="-2.64643" BBK_DIFF_A="-0.00865"/>
      <bbk:Obs TIME_PERIOD="2017-09-13" OBS_VALUE="-2.63778" BBK_DIFF_A="-0.07453"/>
      <bbk:Obs TIME_PERIOD="2017-09-12" OBS_VALUE="-2.56325" BBK_DIFF_A="0.01562"/>
      <bbk:Obs TIME_PERIOD="2017-09-11" OBS_VALUE="-2.57887" BBK_DIFF_A="-0.05461"/>
      <bbk:Obs TIME_PERIOD="2017-09-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-09-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-09-08" OBS_VALUE="-2.52426" BBK_DIFF_A="0.02418"/>
      <bbk:Obs TIME_PERIOD="2017-09-07" OBS_VALUE="-2.54844" BBK_DIFF_A="-0.00801"/>
      <bbk:Obs TIME_PERIOD="2017-09-06" OBS_VALUE="-2.54043" BBK_DIFF_A="0.08651"/>
      <bbk:Obs TIME_PERIOD="2017-09-05" OBS_VALUE="-2.62694" BBK_DIFF_A="-0.03599"/>
      <bbk:Obs TIME_PERIOD="2017-09-04" OBS_VALUE="-2.59095" BBK_DIFF_A="-0.06206"/>
      <bbk:Obs TIME_PERIOD="2017-09-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-09-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-09-01" OBS_VALUE="-2.52889" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2017-08-31" OBS_VALUE="-2.52889" BBK_DIFF_A="-0.02478"/>
      <bbk:Obs TIME_PERIOD="2017-08-30" OBS_VALUE="-2.50411" BBK_DIFF_A="-0.02587"/>
      <bbk:Obs TIME_PERIOD="2017-08-29" OBS_VALUE="-2.47824" BBK_DIFF_A="0.03774"/>
      <bbk:Obs TIME_PERIOD="2017-08-28" OBS_VALUE="-2.51598" BBK_DIFF_A="0.01413"/>
      <bbk:Obs TIME_PERIOD="2017-08-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-08-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-08-25" OBS_VALUE="-2.53011" BBK_DIFF_A="-0.05997"/>
      <bbk:Obs TIME_PERIOD="2017-08-24" OBS_VALUE="-2.47014" BBK_DIFF_A="0.02933"/>
      <bbk:Obs TIME_PERIOD="2017-08-23" OBS_VALUE="-2.49947" BBK_DIFF_A="-0.0274"/>
      <bbk:Obs TIME_PERIOD="2017-08-22" OBS_VALUE="-2.47207" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2017-08-21" OBS_VALUE="-2.47207" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2017-08-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-08-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-08-18" OBS_VALUE="-2.47207" BBK_DIFF_A="0.02232"/>
      <bbk:Obs TIME_PERIOD="2017-08-17" OBS_VALUE="-2.49439" BBK_DIFF_A="0.00957"/>
      <bbk:Obs TIME_PERIOD="2017-08-16" OBS_VALUE="-2.50396" BBK_DIFF_A="-0.31243"/>
      <bbk:Obs TIME_PERIOD="2017-08-15" OBS_VALUE="-2.19153" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2017-08-14" OBS_VALUE="-2.19153" BBK_DIFF_A="-0.00879"/>
      <bbk:Obs TIME_PERIOD="2017-08-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-08-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-08-11" OBS_VALUE="-2.18274" BBK_DIFF_A="0.0221"/>
      <bbk:Obs TIME_PERIOD="2017-08-10" OBS_VALUE="-2.20484" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2017-08-09" OBS_VALUE="-2.20484" BBK_DIFF_A="0.04098"/>
      <bbk:Obs TIME_PERIOD="2017-08-08" OBS_VALUE="-2.24582" BBK_DIFF_A="0.01084"/>
      <bbk:Obs TIME_PERIOD="2017-08-07" OBS_VALUE="-2.25666" BBK_DIFF_A="-0.00449"/>
      <bbk:Obs TIME_PERIOD="2017-08-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-08-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-08-04" OBS_VALUE="-2.25217" BBK_DIFF_A="0.05373"/>
      <bbk:Obs TIME_PERIOD="2017-08-03" OBS_VALUE="-2.3059" BBK_DIFF_A="0.00457"/>
      <bbk:Obs TIME_PERIOD="2017-08-02" OBS_VALUE="-2.31047" BBK_DIFF_A="0.01736"/>
      <bbk:Obs TIME_PERIOD="2017-08-01" OBS_VALUE="-2.32783" BBK_DIFF_A="0.08029"/>
      <bbk:Obs TIME_PERIOD="2017-07-31" OBS_VALUE="-2.40812" BBK_DIFF_A="5.7E-4"/>
      <bbk:Obs TIME_PERIOD="2017-07-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-07-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-07-28" OBS_VALUE="-2.40869" BBK_DIFF_A="-0.02484"/>
      <bbk:Obs TIME_PERIOD="2017-07-27" OBS_VALUE="-2.38385" BBK_DIFF_A="0.03116"/>
      <bbk:Obs TIME_PERIOD="2017-07-26" OBS_VALUE="-2.41501" BBK_DIFF_A="-0.10634"/>
      <bbk:Obs TIME_PERIOD="2017-07-25" OBS_VALUE="-2.30867" BBK_DIFF_A="-0.01183"/>
      <bbk:Obs TIME_PERIOD="2017-07-24" OBS_VALUE="-2.29684" BBK_DIFF_A="0.07525"/>
      <bbk:Obs TIME_PERIOD="2017-07-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-07-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-07-21" OBS_VALUE="-2.37209" BBK_DIFF_A="0.05987"/>
      <bbk:Obs TIME_PERIOD="2017-07-20" OBS_VALUE="-2.43196" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2017-07-19" OBS_VALUE="-2.43196" BBK_DIFF_A="-0.03312"/>
      <bbk:Obs TIME_PERIOD="2017-07-18" OBS_VALUE="-2.39884" BBK_DIFF_A="0.0099"/>
      <bbk:Obs TIME_PERIOD="2017-07-17" OBS_VALUE="-2.40874" BBK_DIFF_A="-0.02673"/>
      <bbk:Obs TIME_PERIOD="2017-07-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-07-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-07-14" OBS_VALUE="-2.38201" BBK_DIFF_A="-0.03484"/>
      <bbk:Obs TIME_PERIOD="2017-07-13" OBS_VALUE="-2.34717" BBK_DIFF_A="0.02858"/>
      <bbk:Obs TIME_PERIOD="2017-07-12" OBS_VALUE="-2.37575" BBK_DIFF_A="-0.05521"/>
      <bbk:Obs TIME_PERIOD="2017-07-11" OBS_VALUE="-2.32054" BBK_DIFF_A="-0.12463"/>
      <bbk:Obs TIME_PERIOD="2017-07-10" OBS_VALUE="-2.19591" BBK_DIFF_A="0.01731"/>
      <bbk:Obs TIME_PERIOD="2017-07-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-07-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-07-07" OBS_VALUE="-2.21322" BBK_DIFF_A="-0.09748"/>
      <bbk:Obs TIME_PERIOD="2017-07-06" OBS_VALUE="-2.11574" BBK_DIFF_A="0.60493"/>
      <bbk:Obs TIME_PERIOD="2017-07-05" OBS_VALUE="-2.72067" BBK_DIFF_A="-0.04256"/>
      <bbk:Obs TIME_PERIOD="2017-07-04" OBS_VALUE="-2.67811" BBK_DIFF_A="-0.05052"/>
      <bbk:Obs TIME_PERIOD="2017-07-03" OBS_VALUE="-2.62759" BBK_DIFF_A="-0.03652"/>
      <bbk:Obs TIME_PERIOD="2017-07-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-07-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-06-30" OBS_VALUE="-2.59107" BBK_DIFF_A="0.00879"/>
      <bbk:Obs TIME_PERIOD="2017-06-29" OBS_VALUE="-2.59986" BBK_DIFF_A="-0.04255"/>
      <bbk:Obs TIME_PERIOD="2017-06-28" OBS_VALUE="-2.55731" BBK_DIFF_A="-0.09546"/>
      <bbk:Obs TIME_PERIOD="2017-06-27" OBS_VALUE="-2.46185" BBK_DIFF_A="-0.02553"/>
      <bbk:Obs TIME_PERIOD="2017-06-26" OBS_VALUE="-2.43632" BBK_DIFF_A="0.00151"/>
      <bbk:Obs TIME_PERIOD="2017-06-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-06-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-06-23" OBS_VALUE="-2.43783" BBK_DIFF_A="-0.03914"/>
      <bbk:Obs TIME_PERIOD="2017-06-22" OBS_VALUE="-2.39869" BBK_DIFF_A="0.05065"/>
      <bbk:Obs TIME_PERIOD="2017-06-21" OBS_VALUE="-2.44934" BBK_DIFF_A="0.02383"/>
      <bbk:Obs TIME_PERIOD="2017-06-20" OBS_VALUE="-2.47317" BBK_DIFF_A="0.05639"/>
      <bbk:Obs TIME_PERIOD="2017-06-19" OBS_VALUE="-2.52956" BBK_DIFF_A="-3.8E-4"/>
      <bbk:Obs TIME_PERIOD="2017-06-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-06-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-06-16" OBS_VALUE="-2.52918" BBK_DIFF_A="-0.08138"/>
      <bbk:Obs TIME_PERIOD="2017-06-15" OBS_VALUE="-2.4478" BBK_DIFF_A="0.06712"/>
      <bbk:Obs TIME_PERIOD="2017-06-14" OBS_VALUE="-2.51492" BBK_DIFF_A="-0.01631"/>
      <bbk:Obs TIME_PERIOD="2017-06-13" OBS_VALUE="-2.49861" BBK_DIFF_A="0.00316"/>
      <bbk:Obs TIME_PERIOD="2017-06-12" OBS_VALUE="-2.50177" BBK_DIFF_A="-0.04479"/>
      <bbk:Obs TIME_PERIOD="2017-06-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-06-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-06-09" OBS_VALUE="-2.45698" BBK_DIFF_A="0.04557"/>
      <bbk:Obs TIME_PERIOD="2017-06-08" OBS_VALUE="-2.50255" BBK_DIFF_A="-0.04771"/>
      <bbk:Obs TIME_PERIOD="2017-06-07" OBS_VALUE="-2.45484" BBK_DIFF_A="-0.04648"/>
      <bbk:Obs TIME_PERIOD="2017-06-06" OBS_VALUE="-2.40836" BBK_DIFF_A="0.00297"/>
      <bbk:Obs TIME_PERIOD="2017-06-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-06-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-06-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-06-02" OBS_VALUE="-2.41133" BBK_DIFF_A="0.01538"/>
      <bbk:Obs TIME_PERIOD="2017-06-01" OBS_VALUE="-2.42671" BBK_DIFF_A="-0.00658"/>
      <bbk:Obs TIME_PERIOD="2017-05-31" OBS_VALUE="-2.42013" BBK_DIFF_A="-0.03409"/>
      <bbk:Obs TIME_PERIOD="2017-05-30" OBS_VALUE="-2.38604" BBK_DIFF_A="0.02103"/>
      <bbk:Obs TIME_PERIOD="2017-05-29" OBS_VALUE="-2.40707" BBK_DIFF_A="0.01654"/>
      <bbk:Obs TIME_PERIOD="2017-05-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-05-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-05-26" OBS_VALUE="-2.42361" BBK_DIFF_A="-0.00891"/>
      <bbk:Obs TIME_PERIOD="2017-05-25" OBS_VALUE="-2.4147" BBK_DIFF_A="0.02901"/>
      <bbk:Obs TIME_PERIOD="2017-05-24" OBS_VALUE="-2.44371" BBK_DIFF_A="0.0364"/>
      <bbk:Obs TIME_PERIOD="2017-05-23" OBS_VALUE="-2.48011" BBK_DIFF_A="0.03645"/>
      <bbk:Obs TIME_PERIOD="2017-05-22" OBS_VALUE="-2.51656" BBK_DIFF_A="-0.07991"/>
      <bbk:Obs TIME_PERIOD="2017-05-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-05-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-05-19" OBS_VALUE="-2.43665" BBK_DIFF_A="-0.03685"/>
      <bbk:Obs TIME_PERIOD="2017-05-18" OBS_VALUE="-2.3998" BBK_DIFF_A="0.12743"/>
      <bbk:Obs TIME_PERIOD="2017-05-17" OBS_VALUE="-2.52723" BBK_DIFF_A="0.03669"/>
      <bbk:Obs TIME_PERIOD="2017-05-16" OBS_VALUE="-2.56392" BBK_DIFF_A="-0.09442"/>
      <bbk:Obs TIME_PERIOD="2017-05-15" OBS_VALUE="-2.4695" BBK_DIFF_A="-2.6E-4"/>
      <bbk:Obs TIME_PERIOD="2017-05-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-05-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-05-12" OBS_VALUE="-2.46924" BBK_DIFF_A="0.00919"/>
      <bbk:Obs TIME_PERIOD="2017-05-11" OBS_VALUE="-2.47843" BBK_DIFF_A="0.00439"/>
      <bbk:Obs TIME_PERIOD="2017-05-10" OBS_VALUE="-2.48282" BBK_DIFF_A="0.03404"/>
      <bbk:Obs TIME_PERIOD="2017-05-09" OBS_VALUE="-2.51686" BBK_DIFF_A="-0.06607"/>
      <bbk:Obs TIME_PERIOD="2017-05-08" OBS_VALUE="-2.45079" BBK_DIFF_A="0.01195"/>
      <bbk:Obs TIME_PERIOD="2017-05-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-05-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-05-05" OBS_VALUE="-2.46274" BBK_DIFF_A="-0.00665"/>
      <bbk:Obs TIME_PERIOD="2017-05-04" OBS_VALUE="-2.45609" BBK_DIFF_A="-0.02749"/>
      <bbk:Obs TIME_PERIOD="2017-05-03" OBS_VALUE="-2.4286" BBK_DIFF_A="-0.03556"/>
      <bbk:Obs TIME_PERIOD="2017-05-02" OBS_VALUE="-2.39304" BBK_DIFF_A="-0.0163"/>
      <bbk:Obs TIME_PERIOD="2017-05-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-04-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-04-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-04-28" OBS_VALUE="-2.37674" BBK_DIFF_A="-0.04736"/>
      <bbk:Obs TIME_PERIOD="2017-04-27" OBS_VALUE="-2.32938" BBK_DIFF_A="-0.01308"/>
      <bbk:Obs TIME_PERIOD="2017-04-26" OBS_VALUE="-2.3163" BBK_DIFF_A="0.00914"/>
      <bbk:Obs TIME_PERIOD="2017-04-25" OBS_VALUE="-2.32544" BBK_DIFF_A="-0.03328"/>
      <bbk:Obs TIME_PERIOD="2017-04-24" OBS_VALUE="-2.29216" BBK_DIFF_A="-0.12984"/>
      <bbk:Obs TIME_PERIOD="2017-04-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-04-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-04-21" OBS_VALUE="-2.16232" BBK_DIFF_A="-0.0191"/>
      <bbk:Obs TIME_PERIOD="2017-04-20" OBS_VALUE="-2.14322" BBK_DIFF_A="-0.01075"/>
      <bbk:Obs TIME_PERIOD="2017-04-19" OBS_VALUE="-2.13247" BBK_DIFF_A="-0.00253"/>
      <bbk:Obs TIME_PERIOD="2017-04-18" OBS_VALUE="-2.12994" BBK_DIFF_A="0.00699"/>
      <bbk:Obs TIME_PERIOD="2017-04-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-04-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-04-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-04-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-04-13" OBS_VALUE="-2.13693" BBK_DIFF_A="0.10965"/>
      <bbk:Obs TIME_PERIOD="2017-04-12" OBS_VALUE="-2.24658" BBK_DIFF_A="0.01381"/>
      <bbk:Obs TIME_PERIOD="2017-04-11" OBS_VALUE="-2.26039" BBK_DIFF_A="-0.03878"/>
      <bbk:Obs TIME_PERIOD="2017-04-10" OBS_VALUE="-2.22161" BBK_DIFF_A="-0.01509"/>
      <bbk:Obs TIME_PERIOD="2017-04-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-04-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-04-07" OBS_VALUE="-2.20652" BBK_DIFF_A="0.05435"/>
      <bbk:Obs TIME_PERIOD="2017-04-06" OBS_VALUE="-2.26087" BBK_DIFF_A="0.10012"/>
      <bbk:Obs TIME_PERIOD="2017-04-05" OBS_VALUE="-2.36099" BBK_DIFF_A="-0.27468"/>
      <bbk:Obs TIME_PERIOD="2017-04-04" OBS_VALUE="-2.08631" BBK_DIFF_A="0.34433"/>
      <bbk:Obs TIME_PERIOD="2017-04-03" OBS_VALUE="-2.43064" BBK_DIFF_A="0.05201"/>
      <bbk:Obs TIME_PERIOD="2017-04-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-04-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-03-31" OBS_VALUE="-2.48265" BBK_DIFF_A="0.03824"/>
      <bbk:Obs TIME_PERIOD="2017-03-30" OBS_VALUE="-2.52089" BBK_DIFF_A="0.04433"/>
      <bbk:Obs TIME_PERIOD="2017-03-29" OBS_VALUE="-2.56522" BBK_DIFF_A="0.01166"/>
      <bbk:Obs TIME_PERIOD="2017-03-28" OBS_VALUE="-2.57688" BBK_DIFF_A="-0.01881"/>
      <bbk:Obs TIME_PERIOD="2017-03-27" OBS_VALUE="-2.55807" BBK_DIFF_A="0.06353"/>
      <bbk:Obs TIME_PERIOD="2017-03-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-03-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-03-24" OBS_VALUE="-2.6216" BBK_DIFF_A="-0.0243"/>
      <bbk:Obs TIME_PERIOD="2017-03-23" OBS_VALUE="-2.5973" BBK_DIFF_A="0.00325"/>
      <bbk:Obs TIME_PERIOD="2017-03-22" OBS_VALUE="-2.60055" BBK_DIFF_A="0.13705"/>
      <bbk:Obs TIME_PERIOD="2017-03-21" OBS_VALUE="-2.7376" BBK_DIFF_A="-0.03491"/>
      <bbk:Obs TIME_PERIOD="2017-03-20" OBS_VALUE="-2.70269" BBK_DIFF_A="0.04491"/>
      <bbk:Obs TIME_PERIOD="2017-03-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-03-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-03-17" OBS_VALUE="-2.7476" BBK_DIFF_A="-0.00497"/>
      <bbk:Obs TIME_PERIOD="2017-03-16" OBS_VALUE="-2.74263" BBK_DIFF_A="-0.00293"/>
      <bbk:Obs TIME_PERIOD="2017-03-15" OBS_VALUE="-2.7397" BBK_DIFF_A="0.02978"/>
      <bbk:Obs TIME_PERIOD="2017-03-14" OBS_VALUE="-2.76948" BBK_DIFF_A="0.01941"/>
      <bbk:Obs TIME_PERIOD="2017-03-13" OBS_VALUE="-2.78889" BBK_DIFF_A="0.11644"/>
      <bbk:Obs TIME_PERIOD="2017-03-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-03-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-03-10" OBS_VALUE="-2.90533" BBK_DIFF_A="-0.07148"/>
      <bbk:Obs TIME_PERIOD="2017-03-09" OBS_VALUE="-2.83385" BBK_DIFF_A="-0.02538"/>
      <bbk:Obs TIME_PERIOD="2017-03-08" OBS_VALUE="-2.80847" BBK_DIFF_A="-0.01597"/>
      <bbk:Obs TIME_PERIOD="2017-03-07" OBS_VALUE="-2.7925" BBK_DIFF_A="-0.09426"/>
      <bbk:Obs TIME_PERIOD="2017-03-06" OBS_VALUE="-2.69824" BBK_DIFF_A="0.02123"/>
      <bbk:Obs TIME_PERIOD="2017-03-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-03-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-03-03" OBS_VALUE="-2.71947" BBK_DIFF_A="-0.01084"/>
      <bbk:Obs TIME_PERIOD="2017-03-02" OBS_VALUE="-2.70863" BBK_DIFF_A="-0.06466"/>
      <bbk:Obs TIME_PERIOD="2017-03-01" OBS_VALUE="-2.64397" BBK_DIFF_A="-0.06984"/>
      <bbk:Obs TIME_PERIOD="2017-02-28" OBS_VALUE="-2.57413" BBK_DIFF_A="-0.05804"/>
      <bbk:Obs TIME_PERIOD="2017-02-27" OBS_VALUE="-2.51609" BBK_DIFF_A="0.03888"/>
      <bbk:Obs TIME_PERIOD="2017-02-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-02-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-02-24" OBS_VALUE="-2.55497" BBK_DIFF_A="0.05332"/>
      <bbk:Obs TIME_PERIOD="2017-02-23" OBS_VALUE="-2.60829" BBK_DIFF_A="0.0365"/>
      <bbk:Obs TIME_PERIOD="2017-02-22" OBS_VALUE="-2.64479" BBK_DIFF_A="-0.0533"/>
      <bbk:Obs TIME_PERIOD="2017-02-21" OBS_VALUE="-2.59149" BBK_DIFF_A="0.0492"/>
      <bbk:Obs TIME_PERIOD="2017-02-20" OBS_VALUE="-2.64069" BBK_DIFF_A="-0.67262"/>
      <bbk:Obs TIME_PERIOD="2017-02-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-02-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-02-17" OBS_VALUE="-1.96807" BBK_DIFF_A="0.11933"/>
      <bbk:Obs TIME_PERIOD="2017-02-16" OBS_VALUE="-2.0874" BBK_DIFF_A="0.06856"/>
      <bbk:Obs TIME_PERIOD="2017-02-15" OBS_VALUE="-2.15596" BBK_DIFF_A="-0.08988"/>
      <bbk:Obs TIME_PERIOD="2017-02-14" OBS_VALUE="-2.06608" BBK_DIFF_A="-0.03531"/>
      <bbk:Obs TIME_PERIOD="2017-02-13" OBS_VALUE="-2.03077" BBK_DIFF_A="-0.07897"/>
      <bbk:Obs TIME_PERIOD="2017-02-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-02-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-02-10" OBS_VALUE="-1.9518" BBK_DIFF_A="0.04861"/>
      <bbk:Obs TIME_PERIOD="2017-02-09" OBS_VALUE="-2.00041" BBK_DIFF_A="0.0631"/>
      <bbk:Obs TIME_PERIOD="2017-02-08" OBS_VALUE="-2.06351" BBK_DIFF_A="0.47488"/>
      <bbk:Obs TIME_PERIOD="2017-02-07" OBS_VALUE="-2.53839" BBK_DIFF_A="0.02378"/>
      <bbk:Obs TIME_PERIOD="2017-02-06" OBS_VALUE="-2.56217" BBK_DIFF_A="-0.03963"/>
      <bbk:Obs TIME_PERIOD="2017-02-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-02-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-02-03" OBS_VALUE="-2.52254" BBK_DIFF_A="-0.02073"/>
      <bbk:Obs TIME_PERIOD="2017-02-02" OBS_VALUE="-2.50181" BBK_DIFF_A="-0.04356"/>
      <bbk:Obs TIME_PERIOD="2017-02-01" OBS_VALUE="-2.45825" BBK_DIFF_A="-0.00935"/>
      <bbk:Obs TIME_PERIOD="2017-01-31" OBS_VALUE="-2.4489" BBK_DIFF_A="0.0172"/>
      <bbk:Obs TIME_PERIOD="2017-01-30" OBS_VALUE="-2.4661" BBK_DIFF_A="-0.03609"/>
      <bbk:Obs TIME_PERIOD="2017-01-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-01-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-01-27" OBS_VALUE="-2.43001" BBK_DIFF_A="0.09712"/>
      <bbk:Obs TIME_PERIOD="2017-01-26" OBS_VALUE="-2.52713" BBK_DIFF_A="-0.03677"/>
      <bbk:Obs TIME_PERIOD="2017-01-25" OBS_VALUE="-2.49036" BBK_DIFF_A="-0.05997"/>
      <bbk:Obs TIME_PERIOD="2017-01-24" OBS_VALUE="-2.43039" BBK_DIFF_A="0.0493"/>
      <bbk:Obs TIME_PERIOD="2017-01-23" OBS_VALUE="-2.47969" BBK_DIFF_A="-8.8E-4"/>
      <bbk:Obs TIME_PERIOD="2017-01-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-01-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-01-20" OBS_VALUE="-2.47881" BBK_DIFF_A="0.02371"/>
      <bbk:Obs TIME_PERIOD="2017-01-19" OBS_VALUE="-2.50252" BBK_DIFF_A="0.00432"/>
      <bbk:Obs TIME_PERIOD="2017-01-18" OBS_VALUE="-2.50684" BBK_DIFF_A="-0.07727"/>
      <bbk:Obs TIME_PERIOD="2017-01-17" OBS_VALUE="-2.42957" BBK_DIFF_A="0.05623"/>
      <bbk:Obs TIME_PERIOD="2017-01-16" OBS_VALUE="-2.4858" BBK_DIFF_A="-0.01447"/>
      <bbk:Obs TIME_PERIOD="2017-01-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-01-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-01-13" OBS_VALUE="-2.47133" BBK_DIFF_A="-0.11062"/>
      <bbk:Obs TIME_PERIOD="2017-01-12" OBS_VALUE="-2.36071" BBK_DIFF_A="0.08499"/>
      <bbk:Obs TIME_PERIOD="2017-01-11" OBS_VALUE="-2.4457" BBK_DIFF_A="0.07709"/>
      <bbk:Obs TIME_PERIOD="2017-01-10" OBS_VALUE="-2.52279" BBK_DIFF_A="0.00484"/>
      <bbk:Obs TIME_PERIOD="2017-01-09" OBS_VALUE="-2.52763" BBK_DIFF_A="-0.003"/>
      <bbk:Obs TIME_PERIOD="2017-01-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-01-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-01-06" OBS_VALUE="-2.52463" BBK_DIFF_A="0.18483"/>
      <bbk:Obs TIME_PERIOD="2017-01-05" OBS_VALUE="-2.70946" BBK_DIFF_A="0.02425"/>
      <bbk:Obs TIME_PERIOD="2017-01-04" OBS_VALUE="-2.73371" BBK_DIFF_A="0.02401"/>
      <bbk:Obs TIME_PERIOD="2017-01-03" OBS_VALUE="-2.75772" BBK_DIFF_A="-0.10858"/>
      <bbk:Obs TIME_PERIOD="2017-01-02" OBS_VALUE="-2.64914" BBK_DIFF_A="-0.04454"/>
      <bbk:Obs TIME_PERIOD="2017-01-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-12-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-12-30" OBS_VALUE="-2.6046" BBK_DIFF_A="-0.02618"/>
      <bbk:Obs TIME_PERIOD="2016-12-29" OBS_VALUE="-2.57842" BBK_DIFF_A="0.06727"/>
      <bbk:Obs TIME_PERIOD="2016-12-28" OBS_VALUE="-2.64569" BBK_DIFF_A="-0.03054"/>
      <bbk:Obs TIME_PERIOD="2016-12-27" OBS_VALUE="-2.61515" BBK_DIFF_A="0.03693"/>
      <bbk:Obs TIME_PERIOD="2016-12-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-12-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-12-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-12-23" OBS_VALUE="-2.65208" BBK_DIFF_A="-0.03924"/>
      <bbk:Obs TIME_PERIOD="2016-12-22" OBS_VALUE="-2.61284" BBK_DIFF_A="-0.00494"/>
      <bbk:Obs TIME_PERIOD="2016-12-21" OBS_VALUE="-2.6079" BBK_DIFF_A="0.0489"/>
      <bbk:Obs TIME_PERIOD="2016-12-20" OBS_VALUE="-2.6568" BBK_DIFF_A="0.06196"/>
      <bbk:Obs TIME_PERIOD="2016-12-19" OBS_VALUE="-2.71876" BBK_DIFF_A="0.00518"/>
      <bbk:Obs TIME_PERIOD="2016-12-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-12-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-12-16" OBS_VALUE="-2.72394" BBK_DIFF_A="0.08534"/>
      <bbk:Obs TIME_PERIOD="2016-12-15" OBS_VALUE="-2.80928" BBK_DIFF_A="-0.06387"/>
      <bbk:Obs TIME_PERIOD="2016-12-14" OBS_VALUE="-2.74541" BBK_DIFF_A="0.06005"/>
      <bbk:Obs TIME_PERIOD="2016-12-13" OBS_VALUE="-2.80546" BBK_DIFF_A="0.09898"/>
      <bbk:Obs TIME_PERIOD="2016-12-12" OBS_VALUE="-2.90444" BBK_DIFF_A="-0.04825"/>
      <bbk:Obs TIME_PERIOD="2016-12-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-12-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-12-09" OBS_VALUE="-2.85619" BBK_DIFF_A="-0.20444"/>
      <bbk:Obs TIME_PERIOD="2016-12-08" OBS_VALUE="-2.65175" BBK_DIFF_A="-0.04893"/>
      <bbk:Obs TIME_PERIOD="2016-12-07" OBS_VALUE="-2.60282" BBK_DIFF_A="-0.06945"/>
      <bbk:Obs TIME_PERIOD="2016-12-06" OBS_VALUE="-2.53337" BBK_DIFF_A="-0.00342"/>
      <bbk:Obs TIME_PERIOD="2016-12-05" OBS_VALUE="-2.52995" BBK_DIFF_A="0.0354"/>
      <bbk:Obs TIME_PERIOD="2016-12-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-12-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-12-02" OBS_VALUE="-2.56535" BBK_DIFF_A="-1.17981"/>
      <bbk:Obs TIME_PERIOD="2016-12-01" OBS_VALUE="-1.38554" BBK_DIFF_A="-0.01029"/>
      <bbk:Obs TIME_PERIOD="2016-11-30" OBS_VALUE="-1.37525" BBK_DIFF_A="0.00442"/>
      <bbk:Obs TIME_PERIOD="2016-11-29" OBS_VALUE="-1.37967" BBK_DIFF_A="0.12232"/>
      <bbk:Obs TIME_PERIOD="2016-11-28" OBS_VALUE="-1.50199" BBK_DIFF_A="0.09536"/>
      <bbk:Obs TIME_PERIOD="2016-11-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-11-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-11-25" OBS_VALUE="-1.59735" BBK_DIFF_A="-0.02043"/>
      <bbk:Obs TIME_PERIOD="2016-11-24" OBS_VALUE="-1.57692" BBK_DIFF_A="-0.02693"/>
      <bbk:Obs TIME_PERIOD="2016-11-23" OBS_VALUE="-1.54999" BBK_DIFF_A="0.6251"/>
      <bbk:Obs TIME_PERIOD="2016-11-22" OBS_VALUE="-2.17509" BBK_DIFF_A="0.04224"/>
      <bbk:Obs TIME_PERIOD="2016-11-21" OBS_VALUE="-2.21733" BBK_DIFF_A="0.00516"/>
      <bbk:Obs TIME_PERIOD="2016-11-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-11-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-11-18" OBS_VALUE="-2.22249" BBK_DIFF_A="-0.03666"/>
      <bbk:Obs TIME_PERIOD="2016-11-17" OBS_VALUE="-2.18583" BBK_DIFF_A="0.10119"/>
      <bbk:Obs TIME_PERIOD="2016-11-16" OBS_VALUE="-2.28702" BBK_DIFF_A="-0.0129"/>
      <bbk:Obs TIME_PERIOD="2016-11-15" OBS_VALUE="-2.27412" BBK_DIFF_A="0.0988"/>
      <bbk:Obs TIME_PERIOD="2016-11-14" OBS_VALUE="-2.37292" BBK_DIFF_A="-0.07187"/>
      <bbk:Obs TIME_PERIOD="2016-11-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-11-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-11-11" OBS_VALUE="-2.30105" BBK_DIFF_A="-0.07091"/>
      <bbk:Obs TIME_PERIOD="2016-11-10" OBS_VALUE="-2.23014" BBK_DIFF_A="-0.1383"/>
      <bbk:Obs TIME_PERIOD="2016-11-09" OBS_VALUE="-2.09184" BBK_DIFF_A="-0.07133"/>
      <bbk:Obs TIME_PERIOD="2016-11-08" OBS_VALUE="-2.02051" BBK_DIFF_A="0.04517"/>
      <bbk:Obs TIME_PERIOD="2016-11-07" OBS_VALUE="-2.06568" BBK_DIFF_A="0.02927"/>
      <bbk:Obs TIME_PERIOD="2016-11-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-11-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-11-04" OBS_VALUE="-2.09495" BBK_DIFF_A="0.00835"/>
      <bbk:Obs TIME_PERIOD="2016-11-03" OBS_VALUE="-2.1033" BBK_DIFF_A="-0.00242"/>
      <bbk:Obs TIME_PERIOD="2016-11-02" OBS_VALUE="-2.10088" BBK_DIFF_A="0.1082"/>
      <bbk:Obs TIME_PERIOD="2016-11-01" OBS_VALUE="-2.20908" BBK_DIFF_A="-0.02073"/>
      <bbk:Obs TIME_PERIOD="2016-10-31" OBS_VALUE="-2.18835" BBK_DIFF_A="0.03254"/>
      <bbk:Obs TIME_PERIOD="2016-10-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-10-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-10-28" OBS_VALUE="-2.22089" BBK_DIFF_A="-0.01859"/>
      <bbk:Obs TIME_PERIOD="2016-10-27" OBS_VALUE="-2.2023" BBK_DIFF_A="-0.17334"/>
      <bbk:Obs TIME_PERIOD="2016-10-26" OBS_VALUE="-2.02896" BBK_DIFF_A="0.00146"/>
      <bbk:Obs TIME_PERIOD="2016-10-25" OBS_VALUE="-2.03042" BBK_DIFF_A="-0.06485"/>
      <bbk:Obs TIME_PERIOD="2016-10-24" OBS_VALUE="-1.96557" BBK_DIFF_A="-0.07795"/>
      <bbk:Obs TIME_PERIOD="2016-10-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-10-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-10-21" OBS_VALUE="-1.88762" BBK_DIFF_A="0.08004"/>
      <bbk:Obs TIME_PERIOD="2016-10-20" OBS_VALUE="-1.96766" BBK_DIFF_A="0.0092"/>
      <bbk:Obs TIME_PERIOD="2016-10-19" OBS_VALUE="-1.97686" BBK_DIFF_A="0.03531"/>
      <bbk:Obs TIME_PERIOD="2016-10-18" OBS_VALUE="-2.01217" BBK_DIFF_A="0.0452"/>
      <bbk:Obs TIME_PERIOD="2016-10-17" OBS_VALUE="-2.05737" BBK_DIFF_A="-0.07301"/>
      <bbk:Obs TIME_PERIOD="2016-10-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-10-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-10-14" OBS_VALUE="-1.98436" BBK_DIFF_A="0.0463"/>
      <bbk:Obs TIME_PERIOD="2016-10-13" OBS_VALUE="-2.03066" BBK_DIFF_A="-0.00584"/>
      <bbk:Obs TIME_PERIOD="2016-10-12" OBS_VALUE="-2.02482" BBK_DIFF_A="0.00232"/>
      <bbk:Obs TIME_PERIOD="2016-10-11" OBS_VALUE="-2.02714" BBK_DIFF_A="-0.03166"/>
      <bbk:Obs TIME_PERIOD="2016-10-10" OBS_VALUE="-1.99548" BBK_DIFF_A="-0.02004"/>
      <bbk:Obs TIME_PERIOD="2016-10-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-10-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-10-07" OBS_VALUE="-1.97544" BBK_DIFF_A="-0.13888"/>
      <bbk:Obs TIME_PERIOD="2016-10-06" OBS_VALUE="-1.83656" BBK_DIFF_A="-0.03057"/>
      <bbk:Obs TIME_PERIOD="2016-10-05" OBS_VALUE="-1.80599" BBK_DIFF_A="-0.09189"/>
      <bbk:Obs TIME_PERIOD="2016-10-04" OBS_VALUE="-1.7141" BBK_DIFF_A="-0.09507"/>
      <bbk:Obs TIME_PERIOD="2016-10-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-10-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-10-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-09-30" OBS_VALUE="-1.61903" BBK_DIFF_A="0.05589"/>
      <bbk:Obs TIME_PERIOD="2016-09-29" OBS_VALUE="-1.67492" BBK_DIFF_A="-0.02093"/>
      <bbk:Obs TIME_PERIOD="2016-09-28" OBS_VALUE="-1.65399" BBK_DIFF_A="-0.04715"/>
      <bbk:Obs TIME_PERIOD="2016-09-27" OBS_VALUE="-1.60684" BBK_DIFF_A="0.03736"/>
      <bbk:Obs TIME_PERIOD="2016-09-26" OBS_VALUE="-1.6442" BBK_DIFF_A="0.02531"/>
      <bbk:Obs TIME_PERIOD="2016-09-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-09-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-09-23" OBS_VALUE="-1.66951" BBK_DIFF_A="0.04644"/>
      <bbk:Obs TIME_PERIOD="2016-09-22" OBS_VALUE="-1.71595" BBK_DIFF_A="0.04502"/>
      <bbk:Obs TIME_PERIOD="2016-09-21" OBS_VALUE="-1.76097" BBK_DIFF_A="0.0566"/>
      <bbk:Obs TIME_PERIOD="2016-09-20" OBS_VALUE="-1.81757" BBK_DIFF_A="0.10169"/>
      <bbk:Obs TIME_PERIOD="2016-09-19" OBS_VALUE="-1.91926" BBK_DIFF_A="-0.05309"/>
      <bbk:Obs TIME_PERIOD="2016-09-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-09-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-09-16" OBS_VALUE="-1.86617" BBK_DIFF_A="-0.00403"/>
      <bbk:Obs TIME_PERIOD="2016-09-15" OBS_VALUE="-1.86214" BBK_DIFF_A="0.00435"/>
      <bbk:Obs TIME_PERIOD="2016-09-14" OBS_VALUE="-1.86649" BBK_DIFF_A="-0.10206"/>
      <bbk:Obs TIME_PERIOD="2016-09-13" OBS_VALUE="-1.76443" BBK_DIFF_A="0.02484"/>
      <bbk:Obs TIME_PERIOD="2016-09-12" OBS_VALUE="-1.78927" BBK_DIFF_A="-0.03107"/>
      <bbk:Obs TIME_PERIOD="2016-09-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-09-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-09-09" OBS_VALUE="-1.7582" BBK_DIFF_A="-0.18187"/>
      <bbk:Obs TIME_PERIOD="2016-09-08" OBS_VALUE="-1.57633" BBK_DIFF_A="-0.02597"/>
      <bbk:Obs TIME_PERIOD="2016-09-07" OBS_VALUE="-1.55036" BBK_DIFF_A="0.10198"/>
      <bbk:Obs TIME_PERIOD="2016-09-06" OBS_VALUE="-1.65234" BBK_DIFF_A="0.04226"/>
      <bbk:Obs TIME_PERIOD="2016-09-05" OBS_VALUE="-1.6946" BBK_DIFF_A="-0.05654"/>
      <bbk:Obs TIME_PERIOD="2016-09-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-09-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-09-02" OBS_VALUE="-1.63806" BBK_DIFF_A="-0.03144"/>
      <bbk:Obs TIME_PERIOD="2016-09-01" OBS_VALUE="-1.60662" BBK_DIFF_A="-0.07422"/>
      <bbk:Obs TIME_PERIOD="2016-08-31" OBS_VALUE="-1.5324" BBK_DIFF_A="0.04037"/>
      <bbk:Obs TIME_PERIOD="2016-08-30" OBS_VALUE="-1.57277" BBK_DIFF_A="0.02874"/>
      <bbk:Obs TIME_PERIOD="2016-08-29" OBS_VALUE="-1.60151" BBK_DIFF_A="-0.03087"/>
      <bbk:Obs TIME_PERIOD="2016-08-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-08-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-08-26" OBS_VALUE="-1.57064" BBK_DIFF_A="-0.04073"/>
      <bbk:Obs TIME_PERIOD="2016-08-25" OBS_VALUE="-1.52991" BBK_DIFF_A="-0.03097"/>
      <bbk:Obs TIME_PERIOD="2016-08-24" OBS_VALUE="-1.49894" BBK_DIFF_A="0.01932"/>
      <bbk:Obs TIME_PERIOD="2016-08-23" OBS_VALUE="-1.51826" BBK_DIFF_A="0.04045"/>
      <bbk:Obs TIME_PERIOD="2016-08-22" OBS_VALUE="-1.55871" BBK_DIFF_A="-0.04652"/>
      <bbk:Obs TIME_PERIOD="2016-08-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-08-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-08-19" OBS_VALUE="-1.51219" BBK_DIFF_A="0.0374"/>
      <bbk:Obs TIME_PERIOD="2016-08-18" OBS_VALUE="-1.54959" BBK_DIFF_A="0.04367"/>
      <bbk:Obs TIME_PERIOD="2016-08-17" OBS_VALUE="-1.59326" BBK_DIFF_A="-0.06372"/>
      <bbk:Obs TIME_PERIOD="2016-08-16" OBS_VALUE="-1.52954" BBK_DIFF_A="-0.00308"/>
      <bbk:Obs TIME_PERIOD="2016-08-15" OBS_VALUE="-1.52646" BBK_DIFF_A="-0.00309"/>
      <bbk:Obs TIME_PERIOD="2016-08-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-08-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-08-12" OBS_VALUE="-1.52337" BBK_DIFF_A="-0.02101"/>
      <bbk:Obs TIME_PERIOD="2016-08-11" OBS_VALUE="-1.50236" BBK_DIFF_A="0.00262"/>
      <bbk:Obs TIME_PERIOD="2016-08-10" OBS_VALUE="-1.50498" BBK_DIFF_A="0.04674"/>
      <bbk:Obs TIME_PERIOD="2016-08-09" OBS_VALUE="-1.55172" BBK_DIFF_A="0.01195"/>
      <bbk:Obs TIME_PERIOD="2016-08-08" OBS_VALUE="-1.56367" BBK_DIFF_A="-0.0427"/>
      <bbk:Obs TIME_PERIOD="2016-08-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-08-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-08-05" OBS_VALUE="-1.52097" BBK_DIFF_A="0.02093"/>
      <bbk:Obs TIME_PERIOD="2016-08-04" OBS_VALUE="-1.5419" BBK_DIFF_A="0.01369"/>
      <bbk:Obs TIME_PERIOD="2016-08-03" OBS_VALUE="-1.55559" BBK_DIFF_A="-0.0329"/>
      <bbk:Obs TIME_PERIOD="2016-08-02" OBS_VALUE="-1.52269" BBK_DIFF_A="-0.08312"/>
      <bbk:Obs TIME_PERIOD="2016-08-01" OBS_VALUE="-1.43957" BBK_DIFF_A="0.0528"/>
      <bbk:Obs TIME_PERIOD="2016-07-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-07-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-07-29" OBS_VALUE="-1.49237" BBK_DIFF_A="-0.04843"/>
      <bbk:Obs TIME_PERIOD="2016-07-28" OBS_VALUE="-1.44394" BBK_DIFF_A="0.11716"/>
      <bbk:Obs TIME_PERIOD="2016-07-27" OBS_VALUE="-1.5611" BBK_DIFF_A="-0.02332"/>
      <bbk:Obs TIME_PERIOD="2016-07-26" OBS_VALUE="-1.53778" BBK_DIFF_A="0.07701"/>
      <bbk:Obs TIME_PERIOD="2016-07-25" OBS_VALUE="-1.61479" BBK_DIFF_A="0.05403"/>
      <bbk:Obs TIME_PERIOD="2016-07-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-07-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-07-22" OBS_VALUE="-1.66882" BBK_DIFF_A="0.04243"/>
      <bbk:Obs TIME_PERIOD="2016-07-21" OBS_VALUE="-1.71125" BBK_DIFF_A="-0.0361"/>
      <bbk:Obs TIME_PERIOD="2016-07-20" OBS_VALUE="-1.67515" BBK_DIFF_A="-0.01047"/>
      <bbk:Obs TIME_PERIOD="2016-07-19" OBS_VALUE="-1.66468" BBK_DIFF_A="0.03952"/>
      <bbk:Obs TIME_PERIOD="2016-07-18" OBS_VALUE="-1.7042" BBK_DIFF_A="-0.0649"/>
      <bbk:Obs TIME_PERIOD="2016-07-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-07-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-07-15" OBS_VALUE="-1.6393" BBK_DIFF_A="-0.04328"/>
      <bbk:Obs TIME_PERIOD="2016-07-14" OBS_VALUE="-1.59602" BBK_DIFF_A="0.02674"/>
      <bbk:Obs TIME_PERIOD="2016-07-13" OBS_VALUE="-1.62276" BBK_DIFF_A="-0.03123"/>
      <bbk:Obs TIME_PERIOD="2016-07-12" OBS_VALUE="-1.59153" BBK_DIFF_A="-0.10359"/>
      <bbk:Obs TIME_PERIOD="2016-07-11" OBS_VALUE="-1.48794" BBK_DIFF_A="0.04459"/>
      <bbk:Obs TIME_PERIOD="2016-07-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-07-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-07-08" OBS_VALUE="-1.53253" BBK_DIFF_A="-0.01563"/>
      <bbk:Obs TIME_PERIOD="2016-07-07" OBS_VALUE="-1.5169" BBK_DIFF_A="-0.0904"/>
      <bbk:Obs TIME_PERIOD="2016-07-06" OBS_VALUE="-1.4265" BBK_DIFF_A="0.07732"/>
      <bbk:Obs TIME_PERIOD="2016-07-05" OBS_VALUE="-1.50382" BBK_DIFF_A="0.07624"/>
      <bbk:Obs TIME_PERIOD="2016-07-04" OBS_VALUE="-1.58006" BBK_DIFF_A="-0.0843"/>
      <bbk:Obs TIME_PERIOD="2016-07-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-07-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-07-01" OBS_VALUE="-1.49576" BBK_DIFF_A="0.02415"/>
      <bbk:Obs TIME_PERIOD="2016-06-30" OBS_VALUE="-1.51991" BBK_DIFF_A="0.01881"/>
      <bbk:Obs TIME_PERIOD="2016-06-29" OBS_VALUE="-1.53872" BBK_DIFF_A="-0.02158"/>
      <bbk:Obs TIME_PERIOD="2016-06-28" OBS_VALUE="-1.51714" BBK_DIFF_A="-0.0674"/>
      <bbk:Obs TIME_PERIOD="2016-06-27" OBS_VALUE="-1.44974" BBK_DIFF_A="0.16535"/>
      <bbk:Obs TIME_PERIOD="2016-06-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-06-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-06-24" OBS_VALUE="-1.61509" BBK_DIFF_A="0.16486"/>
      <bbk:Obs TIME_PERIOD="2016-06-23" OBS_VALUE="-1.77995" BBK_DIFF_A="-0.02121"/>
      <bbk:Obs TIME_PERIOD="2016-06-22" OBS_VALUE="-1.75874" BBK_DIFF_A="0.02494"/>
      <bbk:Obs TIME_PERIOD="2016-06-21" OBS_VALUE="-1.78368" BBK_DIFF_A="-0.01548"/>
      <bbk:Obs TIME_PERIOD="2016-06-20" OBS_VALUE="-1.7682" BBK_DIFF_A="-0.14912"/>
      <bbk:Obs TIME_PERIOD="2016-06-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-06-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-06-17" OBS_VALUE="-1.61908" BBK_DIFF_A="-0.07819"/>
      <bbk:Obs TIME_PERIOD="2016-06-16" OBS_VALUE="-1.54089" BBK_DIFF_A="0.11475"/>
      <bbk:Obs TIME_PERIOD="2016-06-15" OBS_VALUE="-1.65564" BBK_DIFF_A="-0.01072"/>
      <bbk:Obs TIME_PERIOD="2016-06-14" OBS_VALUE="-1.64492" BBK_DIFF_A="0.02543"/>
      <bbk:Obs TIME_PERIOD="2016-06-13" OBS_VALUE="-1.67035" BBK_DIFF_A="0.06182"/>
      <bbk:Obs TIME_PERIOD="2016-06-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-06-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-06-10" OBS_VALUE="-1.73217" BBK_DIFF_A="0.05275"/>
      <bbk:Obs TIME_PERIOD="2016-06-09" OBS_VALUE="-1.78492" BBK_DIFF_A="0.0672"/>
      <bbk:Obs TIME_PERIOD="2016-06-08" OBS_VALUE="-1.85212" BBK_DIFF_A="0.05358"/>
      <bbk:Obs TIME_PERIOD="2016-06-07" OBS_VALUE="-1.9057" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2016-06-06" OBS_VALUE="-1.9057" BBK_DIFF_A="0.09603"/>
      <bbk:Obs TIME_PERIOD="2016-06-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-06-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-06-03" OBS_VALUE="-2.00173" BBK_DIFF_A="0.07564"/>
      <bbk:Obs TIME_PERIOD="2016-06-02" OBS_VALUE="-2.07737" BBK_DIFF_A="-0.01878"/>
      <bbk:Obs TIME_PERIOD="2016-06-01" OBS_VALUE="-2.05859" BBK_DIFF_A="0.04532"/>
      <bbk:Obs TIME_PERIOD="2016-05-31" OBS_VALUE="-2.10391" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2016-05-30" OBS_VALUE="-2.10391" BBK_DIFF_A="-0.06087"/>
      <bbk:Obs TIME_PERIOD="2016-05-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-05-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-05-27" OBS_VALUE="-2.04304" BBK_DIFF_A="0.03298"/>
      <bbk:Obs TIME_PERIOD="2016-05-26" OBS_VALUE="-2.07602" BBK_DIFF_A="0.02835"/>
      <bbk:Obs TIME_PERIOD="2016-05-25" OBS_VALUE="-2.10437" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2016-05-24" OBS_VALUE="-2.10437" BBK_DIFF_A="-0.05085"/>
      <bbk:Obs TIME_PERIOD="2016-05-23" OBS_VALUE="-2.05352" BBK_DIFF_A="0.00721"/>
      <bbk:Obs TIME_PERIOD="2016-05-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-05-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-05-20" OBS_VALUE="-2.06073" BBK_DIFF_A="0.02978"/>
      <bbk:Obs TIME_PERIOD="2016-05-19" OBS_VALUE="-2.09051" BBK_DIFF_A="-0.03992"/>
      <bbk:Obs TIME_PERIOD="2016-05-18" OBS_VALUE="-2.05059" BBK_DIFF_A="0.01358"/>
      <bbk:Obs TIME_PERIOD="2016-05-17" OBS_VALUE="-2.06417" BBK_DIFF_A="-0.02241"/>
      <bbk:Obs TIME_PERIOD="2016-05-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-05-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-05-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-05-13" OBS_VALUE="-2.04176" BBK_DIFF_A="0.04092"/>
      <bbk:Obs TIME_PERIOD="2016-05-12" OBS_VALUE="-2.08268" BBK_DIFF_A="-0.06682"/>
      <bbk:Obs TIME_PERIOD="2016-05-11" OBS_VALUE="-2.01586" BBK_DIFF_A="0.00218"/>
      <bbk:Obs TIME_PERIOD="2016-05-10" OBS_VALUE="-2.01804" BBK_DIFF_A="0.02481"/>
      <bbk:Obs TIME_PERIOD="2016-05-09" OBS_VALUE="-2.04285" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2016-05-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-05-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-05-06" OBS_VALUE="-2.04285" BBK_DIFF_A="0.11005"/>
      <bbk:Obs TIME_PERIOD="2016-05-05" OBS_VALUE="-2.1529" BBK_DIFF_A="-0.04728"/>
      <bbk:Obs TIME_PERIOD="2016-05-04" OBS_VALUE="-2.10562" BBK_DIFF_A="0.07375"/>
      <bbk:Obs TIME_PERIOD="2016-05-03" OBS_VALUE="-2.17937" BBK_DIFF_A="0.00852"/>
      <bbk:Obs TIME_PERIOD="2016-05-02" OBS_VALUE="-2.18789" BBK_DIFF_A="0.02242"/>
      <bbk:Obs TIME_PERIOD="2016-05-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-04-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-04-29" OBS_VALUE="-2.21031" BBK_DIFF_A="0.0152"/>
      <bbk:Obs TIME_PERIOD="2016-04-28" OBS_VALUE="-2.22551" BBK_DIFF_A="0.03326"/>
      <bbk:Obs TIME_PERIOD="2016-04-27" OBS_VALUE="-2.25877" BBK_DIFF_A="-0.01739"/>
      <bbk:Obs TIME_PERIOD="2016-04-26" OBS_VALUE="-2.24138" BBK_DIFF_A="-0.02349"/>
      <bbk:Obs TIME_PERIOD="2016-04-25" OBS_VALUE="-2.21789" BBK_DIFF_A="-0.08325"/>
      <bbk:Obs TIME_PERIOD="2016-04-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-04-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-04-22" OBS_VALUE="-2.13464" BBK_DIFF_A="-0.00328"/>
      <bbk:Obs TIME_PERIOD="2016-04-21" OBS_VALUE="-2.13136" BBK_DIFF_A="-0.06423"/>
      <bbk:Obs TIME_PERIOD="2016-04-20" OBS_VALUE="-2.06713" BBK_DIFF_A="0.02968"/>
      <bbk:Obs TIME_PERIOD="2016-04-19" OBS_VALUE="-2.09681" BBK_DIFF_A="-0.10791"/>
      <bbk:Obs TIME_PERIOD="2016-04-18" OBS_VALUE="-1.9889" BBK_DIFF_A="0.03601"/>
      <bbk:Obs TIME_PERIOD="2016-04-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-04-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-04-15" OBS_VALUE="-2.02491" BBK_DIFF_A="0.01208"/>
      <bbk:Obs TIME_PERIOD="2016-04-14" OBS_VALUE="-2.03699" BBK_DIFF_A="0.05139"/>
      <bbk:Obs TIME_PERIOD="2016-04-13" OBS_VALUE="-2.08838" BBK_DIFF_A="-0.04261"/>
      <bbk:Obs TIME_PERIOD="2016-04-12" OBS_VALUE="-2.04577" BBK_DIFF_A="-0.13625"/>
      <bbk:Obs TIME_PERIOD="2016-04-11" OBS_VALUE="-1.90952" BBK_DIFF_A="-0.03036"/>
      <bbk:Obs TIME_PERIOD="2016-04-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-04-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-04-08" OBS_VALUE="-1.87916" BBK_DIFF_A="0.02154"/>
      <bbk:Obs TIME_PERIOD="2016-04-07" OBS_VALUE="-1.9007" BBK_DIFF_A="0.00956"/>
      <bbk:Obs TIME_PERIOD="2016-04-06" OBS_VALUE="-1.91026" BBK_DIFF_A="-1.34487"/>
      <bbk:Obs TIME_PERIOD="2016-04-05" OBS_VALUE="-0.56539" BBK_DIFF_A="0.08057"/>
      <bbk:Obs TIME_PERIOD="2016-04-04" OBS_VALUE="-0.64596" BBK_DIFF_A="-0.21238"/>
      <bbk:Obs TIME_PERIOD="2016-04-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-04-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-04-01" OBS_VALUE="-0.43358" BBK_DIFF_A="0.00272"/>
      <bbk:Obs TIME_PERIOD="2016-03-31" OBS_VALUE="-0.4363" BBK_DIFF_A="0.00356"/>
      <bbk:Obs TIME_PERIOD="2016-03-30" OBS_VALUE="-0.43986" BBK_DIFF_A="-0.00868"/>
      <bbk:Obs TIME_PERIOD="2016-03-29" OBS_VALUE="-0.43118" BBK_DIFF_A="-0.01759"/>
      <bbk:Obs TIME_PERIOD="2016-03-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-03-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-03-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-03-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-03-24" OBS_VALUE="-0.41359" BBK_DIFF_A="0.01764"/>
      <bbk:Obs TIME_PERIOD="2016-03-23" OBS_VALUE="-0.43123" BBK_DIFF_A="-0.0066"/>
      <bbk:Obs TIME_PERIOD="2016-03-22" OBS_VALUE="-0.42463" BBK_DIFF_A="-0.00518"/>
      <bbk:Obs TIME_PERIOD="2016-03-21" OBS_VALUE="-0.41945" BBK_DIFF_A="0.0018"/>
      <bbk:Obs TIME_PERIOD="2016-03-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-03-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-03-18" OBS_VALUE="-0.42125" BBK_DIFF_A="4.5E-4"/>
      <bbk:Obs TIME_PERIOD="2016-03-17" OBS_VALUE="-0.4217" BBK_DIFF_A="-0.01898"/>
      <bbk:Obs TIME_PERIOD="2016-03-16" OBS_VALUE="-0.40272" BBK_DIFF_A="-0.00689"/>
      <bbk:Obs TIME_PERIOD="2016-03-15" OBS_VALUE="-0.39583" BBK_DIFF_A="-0.00134"/>
      <bbk:Obs TIME_PERIOD="2016-03-14" OBS_VALUE="-0.39449" BBK_DIFF_A="0.00769"/>
      <bbk:Obs TIME_PERIOD="2016-03-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-03-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-03-11" OBS_VALUE="-0.40218" BBK_DIFF_A="0.01883"/>
      <bbk:Obs TIME_PERIOD="2016-03-10" OBS_VALUE="-0.42101" BBK_DIFF_A="-0.00245"/>
      <bbk:Obs TIME_PERIOD="2016-03-09" OBS_VALUE="-0.41856" BBK_DIFF_A="-0.00447"/>
      <bbk:Obs TIME_PERIOD="2016-03-08" OBS_VALUE="-0.41409" BBK_DIFF_A="0.00434"/>
      <bbk:Obs TIME_PERIOD="2016-03-07" OBS_VALUE="-0.41843" BBK_DIFF_A="0.00959"/>
      <bbk:Obs TIME_PERIOD="2016-03-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-03-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-03-04" OBS_VALUE="-0.42802" BBK_DIFF_A="-0.00564"/>
      <bbk:Obs TIME_PERIOD="2016-03-03" OBS_VALUE="-0.42238" BBK_DIFF_A="-0.01733"/>
      <bbk:Obs TIME_PERIOD="2016-03-02" OBS_VALUE="-0.40505" BBK_DIFF_A="0.01319"/>
      <bbk:Obs TIME_PERIOD="2016-03-01" OBS_VALUE="-0.41824" BBK_DIFF_A="0.00125"/>
      <bbk:Obs TIME_PERIOD="2016-02-29" OBS_VALUE="-0.41949" BBK_DIFF_A="-0.00435"/>
      <bbk:Obs TIME_PERIOD="2016-02-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-02-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-02-26" OBS_VALUE="-0.41514" BBK_DIFF_A="0.00138"/>
      <bbk:Obs TIME_PERIOD="2016-02-25" OBS_VALUE="-0.41652" BBK_DIFF_A="-0.00994"/>
      <bbk:Obs TIME_PERIOD="2016-02-24" OBS_VALUE="-0.40658" BBK_DIFF_A="-0.00512"/>
      <bbk:Obs TIME_PERIOD="2016-02-23" OBS_VALUE="-0.40146" BBK_DIFF_A="-0.00157"/>
      <bbk:Obs TIME_PERIOD="2016-02-22" OBS_VALUE="-0.39989" BBK_DIFF_A="0.01094"/>
      <bbk:Obs TIME_PERIOD="2016-02-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-02-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-02-19" OBS_VALUE="-0.41083" BBK_DIFF_A="-0.0191"/>
      <bbk:Obs TIME_PERIOD="2016-02-18" OBS_VALUE="-0.39173" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2016-02-17" OBS_VALUE="-0.39173" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2016-02-16" OBS_VALUE="-0.39173" BBK_DIFF_A="-0.00727"/>
      <bbk:Obs TIME_PERIOD="2016-02-15" OBS_VALUE="-0.38446" BBK_DIFF_A="0.02886"/>
      <bbk:Obs TIME_PERIOD="2016-02-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-02-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-02-12" OBS_VALUE="-0.41332" BBK_DIFF_A="0.00269"/>
      <bbk:Obs TIME_PERIOD="2016-02-11" OBS_VALUE="-0.41601" BBK_DIFF_A="0.00127"/>
      <bbk:Obs TIME_PERIOD="2016-02-10" OBS_VALUE="-0.41728" BBK_DIFF_A="-0.01961"/>
      <bbk:Obs TIME_PERIOD="2016-02-09" OBS_VALUE="-0.39767" BBK_DIFF_A="-0.012"/>
      <bbk:Obs TIME_PERIOD="2016-02-08" OBS_VALUE="-0.38567" BBK_DIFF_A="-0.01824"/>
      <bbk:Obs TIME_PERIOD="2016-02-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-02-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-02-05" OBS_VALUE="-0.36743" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2016-02-04" OBS_VALUE="-0.36743" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2016-02-03" OBS_VALUE="-0.36743" BBK_DIFF_A="-8.1E-4"/>
      <bbk:Obs TIME_PERIOD="2016-02-02" OBS_VALUE="-0.36662" BBK_DIFF_A="0.011"/>
      <bbk:Obs TIME_PERIOD="2016-02-01" OBS_VALUE="-0.37762" BBK_DIFF_A="-0.00537"/>
      <bbk:Obs TIME_PERIOD="2016-01-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-01-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-01-29" OBS_VALUE="-0.37225" BBK_DIFF_A="-0.00837"/>
      <bbk:Obs TIME_PERIOD="2016-01-28" OBS_VALUE="-0.36388" BBK_DIFF_A="0.00573"/>
      <bbk:Obs TIME_PERIOD="2016-01-27" OBS_VALUE="-0.36961" BBK_DIFF_A="0.01051"/>
      <bbk:Obs TIME_PERIOD="2016-01-26" OBS_VALUE="-0.38012" BBK_DIFF_A="-0.01395"/>
      <bbk:Obs TIME_PERIOD="2016-01-25" OBS_VALUE="-0.36617" BBK_DIFF_A="9.4E-4"/>
      <bbk:Obs TIME_PERIOD="2016-01-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-01-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-01-22" OBS_VALUE="-0.36711" BBK_DIFF_A="-0.00923"/>
      <bbk:Obs TIME_PERIOD="2016-01-21" OBS_VALUE="-0.35788" BBK_DIFF_A="-0.00468"/>
      <bbk:Obs TIME_PERIOD="2016-01-20" OBS_VALUE="-0.3532" BBK_DIFF_A="0.00701"/>
      <bbk:Obs TIME_PERIOD="2016-01-19" OBS_VALUE="-0.36021" BBK_DIFF_A="0.01733"/>
      <bbk:Obs TIME_PERIOD="2016-01-18" OBS_VALUE="-0.37754" BBK_DIFF_A="0.0028"/>
      <bbk:Obs TIME_PERIOD="2016-01-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-01-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-01-15" OBS_VALUE="-0.38034" BBK_DIFF_A="0.00122"/>
      <bbk:Obs TIME_PERIOD="2016-01-14" OBS_VALUE="-0.38156" BBK_DIFF_A="0.01232"/>
      <bbk:Obs TIME_PERIOD="2016-01-13" OBS_VALUE="-0.39388" BBK_DIFF_A="-8.4E-4"/>
      <bbk:Obs TIME_PERIOD="2016-01-12" OBS_VALUE="-0.39304" BBK_DIFF_A="-0.00562"/>
      <bbk:Obs TIME_PERIOD="2016-01-11" OBS_VALUE="-0.38742" BBK_DIFF_A="-0.0027"/>
      <bbk:Obs TIME_PERIOD="2016-01-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-01-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-01-08" OBS_VALUE="-0.38472" BBK_DIFF_A="-0.00266"/>
      <bbk:Obs TIME_PERIOD="2016-01-07" OBS_VALUE="-0.38206" BBK_DIFF_A="-0.00277"/>
      <bbk:Obs TIME_PERIOD="2016-01-06" OBS_VALUE="-0.37929" BBK_DIFF_A="0.00526"/>
      <bbk:Obs TIME_PERIOD="2016-01-05" OBS_VALUE="-0.38455" BBK_DIFF_A="-0.00911"/>
      <bbk:Obs TIME_PERIOD="2016-01-04" OBS_VALUE="-0.37544" BBK_DIFF_A="0.01141"/>
      <bbk:Obs TIME_PERIOD="2016-01-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-01-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2016-01-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-12-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-12-30" OBS_VALUE="-0.38685" BBK_DIFF_A="0.04197"/>
      <bbk:Obs TIME_PERIOD="2015-12-29" OBS_VALUE="-0.42882" BBK_DIFF_A="-0.07628"/>
      <bbk:Obs TIME_PERIOD="2015-12-28" OBS_VALUE="-0.35254" BBK_DIFF_A="0.00841"/>
      <bbk:Obs TIME_PERIOD="2015-12-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-12-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-12-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-12-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-12-23" OBS_VALUE="-0.36095" BBK_DIFF_A="0.03914"/>
      <bbk:Obs TIME_PERIOD="2015-12-22" OBS_VALUE="-0.40009" BBK_DIFF_A="-0.07531"/>
      <bbk:Obs TIME_PERIOD="2015-12-21" OBS_VALUE="-0.32478" BBK_DIFF_A="1.5E-4"/>
      <bbk:Obs TIME_PERIOD="2015-12-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-12-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-12-18" OBS_VALUE="-0.32493" BBK_DIFF_A="-0.00892"/>
      <bbk:Obs TIME_PERIOD="2015-12-17" OBS_VALUE="-0.31601" BBK_DIFF_A="-0.00509"/>
      <bbk:Obs TIME_PERIOD="2015-12-16" OBS_VALUE="-0.31092" BBK_DIFF_A="-0.00391"/>
      <bbk:Obs TIME_PERIOD="2015-12-15" OBS_VALUE="-0.30701" BBK_DIFF_A="-0.00148"/>
      <bbk:Obs TIME_PERIOD="2015-12-14" OBS_VALUE="-0.30553" BBK_DIFF_A="-0.00401"/>
      <bbk:Obs TIME_PERIOD="2015-12-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-12-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-12-11" OBS_VALUE="-0.30152" BBK_DIFF_A="-0.00227"/>
      <bbk:Obs TIME_PERIOD="2015-12-10" OBS_VALUE="-0.29925" BBK_DIFF_A="-0.01788"/>
      <bbk:Obs TIME_PERIOD="2015-12-09" OBS_VALUE="-0.28137" BBK_DIFF_A="0.01608"/>
      <bbk:Obs TIME_PERIOD="2015-12-08" OBS_VALUE="-0.29745" BBK_DIFF_A="-0.00432"/>
      <bbk:Obs TIME_PERIOD="2015-12-07" OBS_VALUE="-0.29313" BBK_DIFF_A="-0.00792"/>
      <bbk:Obs TIME_PERIOD="2015-12-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-12-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-12-04" OBS_VALUE="-0.28521" BBK_DIFF_A="0.05435"/>
      <bbk:Obs TIME_PERIOD="2015-12-03" OBS_VALUE="-0.33956" BBK_DIFF_A="-0.0197"/>
      <bbk:Obs TIME_PERIOD="2015-12-02" OBS_VALUE="-0.31986" BBK_DIFF_A="-0.00283"/>
      <bbk:Obs TIME_PERIOD="2015-12-01" OBS_VALUE="-0.31703" BBK_DIFF_A="-0.00572"/>
      <bbk:Obs TIME_PERIOD="2015-11-30" OBS_VALUE="-0.31131" BBK_DIFF_A="0.00649"/>
      <bbk:Obs TIME_PERIOD="2015-11-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-11-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-11-27" OBS_VALUE="-0.3178" BBK_DIFF_A="-0.00416"/>
      <bbk:Obs TIME_PERIOD="2015-11-26" OBS_VALUE="-0.31364" BBK_DIFF_A="-0.01469"/>
      <bbk:Obs TIME_PERIOD="2015-11-25" OBS_VALUE="-0.29895" BBK_DIFF_A="-0.00305"/>
      <bbk:Obs TIME_PERIOD="2015-11-24" OBS_VALUE="-0.2959" BBK_DIFF_A="-0.0021"/>
      <bbk:Obs TIME_PERIOD="2015-11-23" OBS_VALUE="-0.2938" BBK_DIFF_A="-0.00662"/>
      <bbk:Obs TIME_PERIOD="2015-11-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-11-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-11-20" OBS_VALUE="-0.28718" BBK_DIFF_A="-0.01472"/>
      <bbk:Obs TIME_PERIOD="2015-11-19" OBS_VALUE="-0.27246" BBK_DIFF_A="0.00301"/>
      <bbk:Obs TIME_PERIOD="2015-11-18" OBS_VALUE="-0.27547" BBK_DIFF_A="0.00166"/>
      <bbk:Obs TIME_PERIOD="2015-11-17" OBS_VALUE="-0.27713" BBK_DIFF_A="-0.00119"/>
      <bbk:Obs TIME_PERIOD="2015-11-16" OBS_VALUE="-0.27594" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2015-11-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-11-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-11-13" OBS_VALUE="-0.27594" BBK_DIFF_A="-0.00946"/>
      <bbk:Obs TIME_PERIOD="2015-11-12" OBS_VALUE="-0.26648" BBK_DIFF_A="-0.00531"/>
      <bbk:Obs TIME_PERIOD="2015-11-11" OBS_VALUE="-0.26117" BBK_DIFF_A="1.1E-4"/>
      <bbk:Obs TIME_PERIOD="2015-11-10" OBS_VALUE="-0.26128" BBK_DIFF_A="-0.02274"/>
      <bbk:Obs TIME_PERIOD="2015-11-09" OBS_VALUE="-0.23854" BBK_DIFF_A="0.01603"/>
      <bbk:Obs TIME_PERIOD="2015-11-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-11-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-11-06" OBS_VALUE="-0.25457" BBK_DIFF_A="0.00865"/>
      <bbk:Obs TIME_PERIOD="2015-11-05" OBS_VALUE="-0.26322" BBK_DIFF_A="0.01143"/>
      <bbk:Obs TIME_PERIOD="2015-11-04" OBS_VALUE="-0.27465" BBK_DIFF_A="-0.00583"/>
      <bbk:Obs TIME_PERIOD="2015-11-03" OBS_VALUE="-0.26882" BBK_DIFF_A="0.01119"/>
      <bbk:Obs TIME_PERIOD="2015-11-02" OBS_VALUE="-0.28001" BBK_DIFF_A="-0.00547"/>
      <bbk:Obs TIME_PERIOD="2015-11-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-10-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-10-30" OBS_VALUE="-0.27454" BBK_DIFF_A="-0.0018"/>
      <bbk:Obs TIME_PERIOD="2015-10-29" OBS_VALUE="-0.27274" BBK_DIFF_A="-0.00107"/>
      <bbk:Obs TIME_PERIOD="2015-10-28" OBS_VALUE="-0.27167" BBK_DIFF_A="0.00821"/>
      <bbk:Obs TIME_PERIOD="2015-10-27" OBS_VALUE="-0.27988" BBK_DIFF_A="-0.01166"/>
      <bbk:Obs TIME_PERIOD="2015-10-26" OBS_VALUE="-0.26822" BBK_DIFF_A="-0.00502"/>
      <bbk:Obs TIME_PERIOD="2015-10-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-10-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-10-23" OBS_VALUE="-0.2632" BBK_DIFF_A="-0.02651"/>
      <bbk:Obs TIME_PERIOD="2015-10-22" OBS_VALUE="-0.23669" BBK_DIFF_A="-5.9E-4"/>
      <bbk:Obs TIME_PERIOD="2015-10-21" OBS_VALUE="-0.2361" BBK_DIFF_A="0.00304"/>
      <bbk:Obs TIME_PERIOD="2015-10-20" OBS_VALUE="-0.23914" BBK_DIFF_A="0.00496"/>
      <bbk:Obs TIME_PERIOD="2015-10-19" OBS_VALUE="-0.2441" BBK_DIFF_A="-0.00239"/>
      <bbk:Obs TIME_PERIOD="2015-10-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-10-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-10-16" OBS_VALUE="-0.24171" BBK_DIFF_A="-0.00102"/>
      <bbk:Obs TIME_PERIOD="2015-10-15" OBS_VALUE="-0.24069" BBK_DIFF_A="-0.01046"/>
      <bbk:Obs TIME_PERIOD="2015-10-14" OBS_VALUE="-0.23023" BBK_DIFF_A="0.00382"/>
      <bbk:Obs TIME_PERIOD="2015-10-13" OBS_VALUE="-0.23405" BBK_DIFF_A="-0.00541"/>
      <bbk:Obs TIME_PERIOD="2015-10-12" OBS_VALUE="-0.22864" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2015-10-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-10-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-10-09" OBS_VALUE="-0.22864" BBK_DIFF_A="-0.00618"/>
      <bbk:Obs TIME_PERIOD="2015-10-08" OBS_VALUE="-0.22246" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2015-10-07" OBS_VALUE="-0.22246" BBK_DIFF_A="-0.00231"/>
      <bbk:Obs TIME_PERIOD="2015-10-06" OBS_VALUE="-0.22015" BBK_DIFF_A="8.9E-4"/>
      <bbk:Obs TIME_PERIOD="2015-10-05" OBS_VALUE="-0.22104" BBK_DIFF_A="-0.00832"/>
      <bbk:Obs TIME_PERIOD="2015-10-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-10-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-10-02" OBS_VALUE="-0.21272" BBK_DIFF_A="0.0152"/>
      <bbk:Obs TIME_PERIOD="2015-10-01" OBS_VALUE="-0.22792" BBK_DIFF_A="-0.00702"/>
      <bbk:Obs TIME_PERIOD="2015-09-30" OBS_VALUE="-0.2209" BBK_DIFF_A="0.00731"/>
      <bbk:Obs TIME_PERIOD="2015-09-29" OBS_VALUE="-0.22821" BBK_DIFF_A="-0.00349"/>
      <bbk:Obs TIME_PERIOD="2015-09-28" OBS_VALUE="-0.22472" BBK_DIFF_A="-0.00563"/>
      <bbk:Obs TIME_PERIOD="2015-09-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-09-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-09-25" OBS_VALUE="-0.21909" BBK_DIFF_A="-0.0045"/>
      <bbk:Obs TIME_PERIOD="2015-09-24" OBS_VALUE="-0.21459" BBK_DIFF_A="0.0027"/>
      <bbk:Obs TIME_PERIOD="2015-09-23" OBS_VALUE="-0.21729" BBK_DIFF_A="0.00378"/>
      <bbk:Obs TIME_PERIOD="2015-09-22" OBS_VALUE="-0.22107" BBK_DIFF_A="-0.00255"/>
      <bbk:Obs TIME_PERIOD="2015-09-21" OBS_VALUE="-0.21852" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2015-09-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-09-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-09-18" OBS_VALUE="-0.21852" BBK_DIFF_A="-0.01008"/>
      <bbk:Obs TIME_PERIOD="2015-09-17" OBS_VALUE="-0.20844" BBK_DIFF_A="0.00251"/>
      <bbk:Obs TIME_PERIOD="2015-09-16" OBS_VALUE="-0.21095" BBK_DIFF_A="0.00837"/>
      <bbk:Obs TIME_PERIOD="2015-09-15" OBS_VALUE="-0.21932" BBK_DIFF_A="-0.00645"/>
      <bbk:Obs TIME_PERIOD="2015-09-14" OBS_VALUE="-0.21287" BBK_DIFF_A="0.00611"/>
      <bbk:Obs TIME_PERIOD="2015-09-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-09-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-09-11" OBS_VALUE="-0.21898" BBK_DIFF_A="-0.00378"/>
      <bbk:Obs TIME_PERIOD="2015-09-10" OBS_VALUE="-0.2152" BBK_DIFF_A="-0.0053"/>
      <bbk:Obs TIME_PERIOD="2015-09-09" OBS_VALUE="-0.2099" BBK_DIFF_A="0.03005"/>
      <bbk:Obs TIME_PERIOD="2015-09-08" OBS_VALUE="-0.23995" BBK_DIFF_A="0.37726"/>
      <bbk:Obs TIME_PERIOD="2015-09-07" OBS_VALUE="-0.61721" BBK_DIFF_A="0.10775"/>
      <bbk:Obs TIME_PERIOD="2015-09-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-09-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-09-04" OBS_VALUE="-0.72496" BBK_DIFF_A="0.16464"/>
      <bbk:Obs TIME_PERIOD="2015-09-03" OBS_VALUE="-0.8896" BBK_DIFF_A="-0.00484"/>
      <bbk:Obs TIME_PERIOD="2015-09-02" OBS_VALUE="-0.88476" BBK_DIFF_A="-0.23683"/>
      <bbk:Obs TIME_PERIOD="2015-09-01" OBS_VALUE="-0.64793" BBK_DIFF_A="-0.43303"/>
      <bbk:Obs TIME_PERIOD="2015-08-31" OBS_VALUE="-0.2149" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2015-08-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-08-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-08-28" OBS_VALUE="-0.2149" BBK_DIFF_A="0.00164"/>
      <bbk:Obs TIME_PERIOD="2015-08-27" OBS_VALUE="-0.21654" BBK_DIFF_A="-0.00419"/>
      <bbk:Obs TIME_PERIOD="2015-08-26" OBS_VALUE="-0.21235" BBK_DIFF_A="0.01398"/>
      <bbk:Obs TIME_PERIOD="2015-08-25" OBS_VALUE="-0.22633" BBK_DIFF_A="-0.00801"/>
      <bbk:Obs TIME_PERIOD="2015-08-24" OBS_VALUE="-0.21832" BBK_DIFF_A="0.00103"/>
      <bbk:Obs TIME_PERIOD="2015-08-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-08-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-08-21" OBS_VALUE="-0.21935" BBK_DIFF_A="0.11598"/>
      <bbk:Obs TIME_PERIOD="2015-08-20" OBS_VALUE="-0.33533" BBK_DIFF_A="0.16291"/>
      <bbk:Obs TIME_PERIOD="2015-08-19" OBS_VALUE="-0.49824" BBK_DIFF_A="0.71567"/>
      <bbk:Obs TIME_PERIOD="2015-08-18" OBS_VALUE="-1.21391" BBK_DIFF_A="-0.768"/>
      <bbk:Obs TIME_PERIOD="2015-08-17" OBS_VALUE="-0.44591" BBK_DIFF_A="-0.01709"/>
      <bbk:Obs TIME_PERIOD="2015-08-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-08-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-08-14" OBS_VALUE="-0.42882" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2015-08-13" OBS_VALUE="-0.42882" BBK_DIFF_A="0.43128"/>
      <bbk:Obs TIME_PERIOD="2015-08-12" OBS_VALUE="-0.8601" BBK_DIFF_A="0.03118"/>
      <bbk:Obs TIME_PERIOD="2015-08-11" OBS_VALUE="-0.89128" BBK_DIFF_A="0.0068"/>
      <bbk:Obs TIME_PERIOD="2015-08-10" OBS_VALUE="-0.89808" BBK_DIFF_A="-0.00625"/>
      <bbk:Obs TIME_PERIOD="2015-08-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-08-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-08-07" OBS_VALUE="-0.89183" BBK_DIFF_A="0.25086"/>
      <bbk:Obs TIME_PERIOD="2015-08-06" OBS_VALUE="-1.14269" BBK_DIFF_A="-0.13003"/>
      <bbk:Obs TIME_PERIOD="2015-08-05" OBS_VALUE="-1.01266" BBK_DIFF_A="-0.03916"/>
      <bbk:Obs TIME_PERIOD="2015-08-04" OBS_VALUE="-0.9735" BBK_DIFF_A="0.02592"/>
      <bbk:Obs TIME_PERIOD="2015-08-03" OBS_VALUE="-0.99942" BBK_DIFF_A="-0.04818"/>
      <bbk:Obs TIME_PERIOD="2015-08-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-08-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-07-31" OBS_VALUE="-0.95124" BBK_DIFF_A="0.25698"/>
      <bbk:Obs TIME_PERIOD="2015-07-30" OBS_VALUE="-1.20822" BBK_DIFF_A="-0.11929"/>
      <bbk:Obs TIME_PERIOD="2015-07-29" OBS_VALUE="-1.08893" BBK_DIFF_A="0.04088"/>
      <bbk:Obs TIME_PERIOD="2015-07-28" OBS_VALUE="-1.12981" BBK_DIFF_A="-0.1505"/>
      <bbk:Obs TIME_PERIOD="2015-07-27" OBS_VALUE="-0.97931" BBK_DIFF_A="0.04828"/>
      <bbk:Obs TIME_PERIOD="2015-07-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-07-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-07-24" OBS_VALUE="-1.02759" BBK_DIFF_A="0.11079"/>
      <bbk:Obs TIME_PERIOD="2015-07-23" OBS_VALUE="-1.13838" BBK_DIFF_A="-0.14169"/>
      <bbk:Obs TIME_PERIOD="2015-07-22" OBS_VALUE="-0.99669" BBK_DIFF_A="0.14737"/>
      <bbk:Obs TIME_PERIOD="2015-07-21" OBS_VALUE="-1.14406" BBK_DIFF_A="-0.06723"/>
      <bbk:Obs TIME_PERIOD="2015-07-20" OBS_VALUE="-1.07683" BBK_DIFF_A="-0.00998"/>
      <bbk:Obs TIME_PERIOD="2015-07-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-07-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-07-17" OBS_VALUE="-1.06685" BBK_DIFF_A="-0.04753"/>
      <bbk:Obs TIME_PERIOD="2015-07-16" OBS_VALUE="-1.01932" BBK_DIFF_A="0.1508"/>
      <bbk:Obs TIME_PERIOD="2015-07-15" OBS_VALUE="-1.17012" BBK_DIFF_A="0.06086"/>
      <bbk:Obs TIME_PERIOD="2015-07-14" OBS_VALUE="-1.23098" BBK_DIFF_A="0.05889"/>
      <bbk:Obs TIME_PERIOD="2015-07-13" OBS_VALUE="-1.28987" BBK_DIFF_A="0.0454"/>
      <bbk:Obs TIME_PERIOD="2015-07-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-07-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-07-10" OBS_VALUE="-1.33527" BBK_DIFF_A="-0.2263"/>
      <bbk:Obs TIME_PERIOD="2015-07-09" OBS_VALUE="-1.10897" BBK_DIFF_A="-0.21306"/>
      <bbk:Obs TIME_PERIOD="2015-07-08" OBS_VALUE="-0.89591" BBK_DIFF_A="-0.13809"/>
      <bbk:Obs TIME_PERIOD="2015-07-07" OBS_VALUE="-0.75782" BBK_DIFF_A="0.04107"/>
      <bbk:Obs TIME_PERIOD="2015-07-06" OBS_VALUE="-0.79889" BBK_DIFF_A="0.19303"/>
      <bbk:Obs TIME_PERIOD="2015-07-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-07-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-07-03" OBS_VALUE="-0.99192" BBK_DIFF_A="-0.00388"/>
      <bbk:Obs TIME_PERIOD="2015-07-02" OBS_VALUE="-0.98804" BBK_DIFF_A="0.01305"/>
      <bbk:Obs TIME_PERIOD="2015-07-01" OBS_VALUE="-1.00109" BBK_DIFF_A="-0.16088"/>
      <bbk:Obs TIME_PERIOD="2015-06-30" OBS_VALUE="-0.84021" BBK_DIFF_A="0.09601"/>
      <bbk:Obs TIME_PERIOD="2015-06-29" OBS_VALUE="-0.93622" BBK_DIFF_A="0.07567"/>
      <bbk:Obs TIME_PERIOD="2015-06-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-06-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-06-26" OBS_VALUE="-1.01189" BBK_DIFF_A="0.11313"/>
      <bbk:Obs TIME_PERIOD="2015-06-25" OBS_VALUE="-1.12502" BBK_DIFF_A="-0.10096"/>
      <bbk:Obs TIME_PERIOD="2015-06-24" OBS_VALUE="-1.02406" BBK_DIFF_A="0.16046"/>
      <bbk:Obs TIME_PERIOD="2015-06-23" OBS_VALUE="-1.18452" BBK_DIFF_A="-0.10904"/>
      <bbk:Obs TIME_PERIOD="2015-06-22" OBS_VALUE="-1.07548" BBK_DIFF_A="0.08511"/>
      <bbk:Obs TIME_PERIOD="2015-06-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-06-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-06-19" OBS_VALUE="-1.16059" BBK_DIFF_A="-0.23255"/>
      <bbk:Obs TIME_PERIOD="2015-06-18" OBS_VALUE="-0.92804" BBK_DIFF_A="0.25387"/>
      <bbk:Obs TIME_PERIOD="2015-06-17" OBS_VALUE="-1.18191" BBK_DIFF_A="-0.05788"/>
      <bbk:Obs TIME_PERIOD="2015-06-16" OBS_VALUE="-1.12403" BBK_DIFF_A="0.11957"/>
      <bbk:Obs TIME_PERIOD="2015-06-15" OBS_VALUE="-1.2436" BBK_DIFF_A="0.06066"/>
      <bbk:Obs TIME_PERIOD="2015-06-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-06-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-06-12" OBS_VALUE="-1.30426" BBK_DIFF_A="0.13827"/>
      <bbk:Obs TIME_PERIOD="2015-06-11" OBS_VALUE="-1.44253" BBK_DIFF_A="0.0231"/>
      <bbk:Obs TIME_PERIOD="2015-06-10" OBS_VALUE="-1.46563" BBK_DIFF_A="-0.11638"/>
      <bbk:Obs TIME_PERIOD="2015-06-09" OBS_VALUE="-1.34925" BBK_DIFF_A="-0.07889"/>
      <bbk:Obs TIME_PERIOD="2015-06-08" OBS_VALUE="-1.27036" BBK_DIFF_A="0.15484"/>
      <bbk:Obs TIME_PERIOD="2015-06-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-06-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-06-05" OBS_VALUE="-1.4252" BBK_DIFF_A="0.07236"/>
      <bbk:Obs TIME_PERIOD="2015-06-04" OBS_VALUE="-1.49756" BBK_DIFF_A="-0.34725"/>
      <bbk:Obs TIME_PERIOD="2015-06-03" OBS_VALUE="-1.15031" BBK_DIFF_A="-0.07729"/>
      <bbk:Obs TIME_PERIOD="2015-06-02" OBS_VALUE="-1.07302" BBK_DIFF_A="-0.5716"/>
      <bbk:Obs TIME_PERIOD="2015-06-01" OBS_VALUE="-0.50142" BBK_DIFF_A="0.17273"/>
      <bbk:Obs TIME_PERIOD="2015-05-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-05-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-05-29" OBS_VALUE="-0.67415" BBK_DIFF_A="0.14617"/>
      <bbk:Obs TIME_PERIOD="2015-05-28" OBS_VALUE="-0.82032" BBK_DIFF_A="0.11313"/>
      <bbk:Obs TIME_PERIOD="2015-05-27" OBS_VALUE="-0.93345" BBK_DIFF_A="0.06732"/>
      <bbk:Obs TIME_PERIOD="2015-05-26" OBS_VALUE="-1.00077" BBK_DIFF_A="0.2499"/>
      <bbk:Obs TIME_PERIOD="2015-05-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-05-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-05-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-05-22" OBS_VALUE="-1.25067" BBK_DIFF_A="-0.0503"/>
      <bbk:Obs TIME_PERIOD="2015-05-21" OBS_VALUE="-1.20037" BBK_DIFF_A="5.9E-4"/>
      <bbk:Obs TIME_PERIOD="2015-05-20" OBS_VALUE="-1.20096" BBK_DIFF_A="-0.3252"/>
      <bbk:Obs TIME_PERIOD="2015-05-19" OBS_VALUE="-0.87576" BBK_DIFF_A="0.36846"/>
      <bbk:Obs TIME_PERIOD="2015-05-18" OBS_VALUE="-1.24422" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2015-05-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-05-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-05-15" OBS_VALUE="-1.24422" BBK_DIFF_A="0.2678"/>
      <bbk:Obs TIME_PERIOD="2015-05-14" OBS_VALUE="-1.51202" BBK_DIFF_A="-0.1228"/>
      <bbk:Obs TIME_PERIOD="2015-05-13" OBS_VALUE="-1.38922" BBK_DIFF_A="0.3042"/>
      <bbk:Obs TIME_PERIOD="2015-05-12" OBS_VALUE="-1.69342" BBK_DIFF_A="-0.34755"/>
      <bbk:Obs TIME_PERIOD="2015-05-11" OBS_VALUE="-1.34587" BBK_DIFF_A="0.20825"/>
      <bbk:Obs TIME_PERIOD="2015-05-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-05-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-05-08" OBS_VALUE="-1.55412" BBK_DIFF_A="-0.06151"/>
      <bbk:Obs TIME_PERIOD="2015-05-07" OBS_VALUE="-1.49261" BBK_DIFF_A="0.25275"/>
      <bbk:Obs TIME_PERIOD="2015-05-06" OBS_VALUE="-1.74536" BBK_DIFF_A="-0.11343"/>
      <bbk:Obs TIME_PERIOD="2015-05-05" OBS_VALUE="-1.63193" BBK_DIFF_A="0.06451"/>
      <bbk:Obs TIME_PERIOD="2015-05-04" OBS_VALUE="-1.69644" BBK_DIFF_A="-0.12087"/>
      <bbk:Obs TIME_PERIOD="2015-05-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-05-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-05-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-04-30" OBS_VALUE="-1.57557" BBK_DIFF_A="-0.12158"/>
      <bbk:Obs TIME_PERIOD="2015-04-29" OBS_VALUE="-1.45399" BBK_DIFF_A="-0.12085"/>
      <bbk:Obs TIME_PERIOD="2015-04-28" OBS_VALUE="-1.33314" BBK_DIFF_A="-1.06123"/>
      <bbk:Obs TIME_PERIOD="2015-04-27" OBS_VALUE="-0.27191" BBK_DIFF_A="-0.00411"/>
      <bbk:Obs TIME_PERIOD="2015-04-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-04-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-04-24" OBS_VALUE="-0.2678" BBK_DIFF_A="0.01872"/>
      <bbk:Obs TIME_PERIOD="2015-04-23" OBS_VALUE="-0.28652" BBK_DIFF_A="0.37634"/>
      <bbk:Obs TIME_PERIOD="2015-04-22" OBS_VALUE="-0.66286" BBK_DIFF_A="0.09451"/>
      <bbk:Obs TIME_PERIOD="2015-04-21" OBS_VALUE="-0.75737" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2015-04-20" OBS_VALUE="-0.75737" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2015-04-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-04-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-04-17" OBS_VALUE="-0.75737" BBK_DIFF_A="0.19239"/>
      <bbk:Obs TIME_PERIOD="2015-04-16" OBS_VALUE="-0.94976" BBK_DIFF_A="-0.0681"/>
      <bbk:Obs TIME_PERIOD="2015-04-15" OBS_VALUE="-0.88166" BBK_DIFF_A="0.1145"/>
      <bbk:Obs TIME_PERIOD="2015-04-14" OBS_VALUE="-0.99616" BBK_DIFF_A="0.03185"/>
      <bbk:Obs TIME_PERIOD="2015-04-13" OBS_VALUE="-1.02801" BBK_DIFF_A="0.01401"/>
      <bbk:Obs TIME_PERIOD="2015-04-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-04-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-04-10" OBS_VALUE="-1.04202" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2015-04-09" OBS_VALUE="-1.04202" BBK_DIFF_A="0.27559"/>
      <bbk:Obs TIME_PERIOD="2015-04-08" OBS_VALUE="-1.31761" BBK_DIFF_A="-0.00805"/>
      <bbk:Obs TIME_PERIOD="2015-04-07" OBS_VALUE="-1.30956" BBK_DIFF_A="-0.05142"/>
      <bbk:Obs TIME_PERIOD="2015-04-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-04-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-04-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-04-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-04-02" OBS_VALUE="-1.25814" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2015-04-01" OBS_VALUE="-1.25814" BBK_DIFF_A="-0.02099"/>
      <bbk:Obs TIME_PERIOD="2015-03-31" OBS_VALUE="-1.23715" BBK_DIFF_A="0.01241"/>
      <bbk:Obs TIME_PERIOD="2015-03-30" OBS_VALUE="-1.24956" BBK_DIFF_A="0.07127"/>
      <bbk:Obs TIME_PERIOD="2015-03-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-03-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-03-27" OBS_VALUE="-1.32083" BBK_DIFF_A="-0.07681"/>
      <bbk:Obs TIME_PERIOD="2015-03-26" OBS_VALUE="-1.24402" BBK_DIFF_A="0.00453"/>
      <bbk:Obs TIME_PERIOD="2015-03-25" OBS_VALUE="-1.24855" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2015-03-24" OBS_VALUE="-1.24855" BBK_DIFF_A="0.01823"/>
      <bbk:Obs TIME_PERIOD="2015-03-23" OBS_VALUE="-1.26678" BBK_DIFF_A="-0.02214"/>
      <bbk:Obs TIME_PERIOD="2015-03-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-03-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-03-20" OBS_VALUE="-1.24464" BBK_DIFF_A="0.0228"/>
      <bbk:Obs TIME_PERIOD="2015-03-19" OBS_VALUE="-1.26744" BBK_DIFF_A="0.07815"/>
      <bbk:Obs TIME_PERIOD="2015-03-18" OBS_VALUE="-1.34559" BBK_DIFF_A="-0.02241"/>
      <bbk:Obs TIME_PERIOD="2015-03-17" OBS_VALUE="-1.32318" BBK_DIFF_A="-0.58358"/>
      <bbk:Obs TIME_PERIOD="2015-03-16" OBS_VALUE="-0.7396" BBK_DIFF_A="-0.07637"/>
      <bbk:Obs TIME_PERIOD="2015-03-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-03-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-03-13" OBS_VALUE="-0.66323" BBK_DIFF_A="-0.48357"/>
      <bbk:Obs TIME_PERIOD="2015-03-12" OBS_VALUE="-0.17966" BBK_DIFF_A="0.00592"/>
      <bbk:Obs TIME_PERIOD="2015-03-11" OBS_VALUE="-0.18558" BBK_DIFF_A="-0.02038"/>
      <bbk:Obs TIME_PERIOD="2015-03-10" OBS_VALUE="-0.1652" BBK_DIFF_A="-0.0079"/>
      <bbk:Obs TIME_PERIOD="2015-03-09" OBS_VALUE="-0.1573" BBK_DIFF_A="-0.01072"/>
      <bbk:Obs TIME_PERIOD="2015-03-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-03-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-03-06" OBS_VALUE="-0.14658" BBK_DIFF_A="-0.0023"/>
      <bbk:Obs TIME_PERIOD="2015-03-05" OBS_VALUE="-0.14428" BBK_DIFF_A="-0.00389"/>
      <bbk:Obs TIME_PERIOD="2015-03-04" OBS_VALUE="-0.14039" BBK_DIFF_A="0.00111"/>
      <bbk:Obs TIME_PERIOD="2015-03-03" OBS_VALUE="-0.1415" BBK_DIFF_A="-0.00229"/>
      <bbk:Obs TIME_PERIOD="2015-03-02" OBS_VALUE="-0.13921" BBK_DIFF_A="-0.00738"/>
      <bbk:Obs TIME_PERIOD="2015-03-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-02-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-02-27" OBS_VALUE="-0.13183" BBK_DIFF_A="-3.1E-4"/>
      <bbk:Obs TIME_PERIOD="2015-02-26" OBS_VALUE="-0.13152" BBK_DIFF_A="-0.01317"/>
      <bbk:Obs TIME_PERIOD="2015-02-25" OBS_VALUE="-0.11835" BBK_DIFF_A="1.65567"/>
      <bbk:Obs TIME_PERIOD="2015-02-24" OBS_VALUE="-1.77402" BBK_DIFF_A="-0.01001"/>
      <bbk:Obs TIME_PERIOD="2015-02-23" OBS_VALUE="-1.76401" BBK_DIFF_A="-0.08312"/>
      <bbk:Obs TIME_PERIOD="2015-02-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-02-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-02-20" OBS_VALUE="-1.68089" BBK_DIFF_A="-0.04722"/>
      <bbk:Obs TIME_PERIOD="2015-02-19" OBS_VALUE="-1.63367" BBK_DIFF_A="-0.03883"/>
      <bbk:Obs TIME_PERIOD="2015-02-18" OBS_VALUE="-1.59484" BBK_DIFF_A="-0.074"/>
      <bbk:Obs TIME_PERIOD="2015-02-17" OBS_VALUE="-1.52084" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2015-02-16" OBS_VALUE="-1.52084" BBK_DIFF_A="0.02141"/>
      <bbk:Obs TIME_PERIOD="2015-02-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-02-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-02-13" OBS_VALUE="-1.54225" BBK_DIFF_A="-0.18029"/>
      <bbk:Obs TIME_PERIOD="2015-02-12" OBS_VALUE="-1.36196" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2015-02-11" OBS_VALUE="-1.36196" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2015-02-10" OBS_VALUE="-1.36196" BBK_DIFF_A="-0.00739"/>
      <bbk:Obs TIME_PERIOD="2015-02-09" OBS_VALUE="-1.35457" BBK_DIFF_A="0.01539"/>
      <bbk:Obs TIME_PERIOD="2015-02-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-02-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-02-06" OBS_VALUE="-1.36996" BBK_DIFF_A="0.03587"/>
      <bbk:Obs TIME_PERIOD="2015-02-05" OBS_VALUE="-1.40583" BBK_DIFF_A="0.09291"/>
      <bbk:Obs TIME_PERIOD="2015-02-04" OBS_VALUE="-1.49874" BBK_DIFF_A="0.12816"/>
      <bbk:Obs TIME_PERIOD="2015-02-03" OBS_VALUE="-1.6269" BBK_DIFF_A="-0.03761"/>
      <bbk:Obs TIME_PERIOD="2015-02-02" OBS_VALUE="-1.58929" BBK_DIFF_A="0.1314"/>
      <bbk:Obs TIME_PERIOD="2015-02-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-01-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-01-30" OBS_VALUE="-1.72069" BBK_DIFF_A="0.02391"/>
      <bbk:Obs TIME_PERIOD="2015-01-29" OBS_VALUE="-1.7446" BBK_DIFF_A="0.11451"/>
      <bbk:Obs TIME_PERIOD="2015-01-28" OBS_VALUE="-1.85911" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2015-01-27" OBS_VALUE="-1.85911" BBK_DIFF_A="0.0097"/>
      <bbk:Obs TIME_PERIOD="2015-01-26" OBS_VALUE="-1.86881" BBK_DIFF_A="0.0068"/>
      <bbk:Obs TIME_PERIOD="2015-01-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-01-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-01-23" OBS_VALUE="-1.87561" BBK_DIFF_A="0.28687"/>
      <bbk:Obs TIME_PERIOD="2015-01-22" OBS_VALUE="-2.16248" BBK_DIFF_A="-0.13135"/>
      <bbk:Obs TIME_PERIOD="2015-01-21" OBS_VALUE="-2.03113" BBK_DIFF_A="0.02644"/>
      <bbk:Obs TIME_PERIOD="2015-01-20" OBS_VALUE="-2.05757" BBK_DIFF_A="0.00812"/>
      <bbk:Obs TIME_PERIOD="2015-01-19" OBS_VALUE="-2.06569" BBK_DIFF_A="-0.04309"/>
      <bbk:Obs TIME_PERIOD="2015-01-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-01-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-01-16" OBS_VALUE="-2.0226" BBK_DIFF_A="0.06263"/>
      <bbk:Obs TIME_PERIOD="2015-01-15" OBS_VALUE="-2.08523" BBK_DIFF_A="-0.01962"/>
      <bbk:Obs TIME_PERIOD="2015-01-14" OBS_VALUE="-2.06561" BBK_DIFF_A="-0.06469"/>
      <bbk:Obs TIME_PERIOD="2015-01-13" OBS_VALUE="-2.00092" BBK_DIFF_A="0.06862"/>
      <bbk:Obs TIME_PERIOD="2015-01-12" OBS_VALUE="-2.06954" BBK_DIFF_A="0.09011"/>
      <bbk:Obs TIME_PERIOD="2015-01-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-01-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-01-09" OBS_VALUE="-2.15965" BBK_DIFF_A="-0.08756"/>
      <bbk:Obs TIME_PERIOD="2015-01-08" OBS_VALUE="-2.07209" BBK_DIFF_A="-0.0892"/>
      <bbk:Obs TIME_PERIOD="2015-01-07" OBS_VALUE="-1.98289" BBK_DIFF_A="0.11933"/>
      <bbk:Obs TIME_PERIOD="2015-01-06" OBS_VALUE="-2.10222" BBK_DIFF_A="0.11679"/>
      <bbk:Obs TIME_PERIOD="2015-01-05" OBS_VALUE="-2.21901" BBK_DIFF_A="0.06859"/>
      <bbk:Obs TIME_PERIOD="2015-01-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-01-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2015-01-02" OBS_VALUE="-2.2876" BBK_DIFF_A="0.08885"/>
      <bbk:Obs TIME_PERIOD="2015-01-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-12-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-12-30" OBS_VALUE="-2.37645" BBK_DIFF_A="-0.00741"/>
      <bbk:Obs TIME_PERIOD="2014-12-29" OBS_VALUE="-2.36904" BBK_DIFF_A="0.00603"/>
      <bbk:Obs TIME_PERIOD="2014-12-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-12-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-12-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-12-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-12-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-12-23" OBS_VALUE="-2.37507" BBK_DIFF_A="0.07717"/>
      <bbk:Obs TIME_PERIOD="2014-12-22" OBS_VALUE="-2.45224" BBK_DIFF_A="-0.09433"/>
      <bbk:Obs TIME_PERIOD="2014-12-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-12-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-12-19" OBS_VALUE="-2.35791" BBK_DIFF_A="-0.05688"/>
      <bbk:Obs TIME_PERIOD="2014-12-18" OBS_VALUE="-2.30103" BBK_DIFF_A="-0.05406"/>
      <bbk:Obs TIME_PERIOD="2014-12-17" OBS_VALUE="-2.24697" BBK_DIFF_A="0.03089"/>
      <bbk:Obs TIME_PERIOD="2014-12-16" OBS_VALUE="-2.27786" BBK_DIFF_A="0.06464"/>
      <bbk:Obs TIME_PERIOD="2014-12-15" OBS_VALUE="-2.3425" BBK_DIFF_A="0.01666"/>
      <bbk:Obs TIME_PERIOD="2014-12-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-12-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-12-12" OBS_VALUE="-2.35916" BBK_DIFF_A="0.06037"/>
      <bbk:Obs TIME_PERIOD="2014-12-11" OBS_VALUE="-2.41953" BBK_DIFF_A="-0.00665"/>
      <bbk:Obs TIME_PERIOD="2014-12-10" OBS_VALUE="-2.41288" BBK_DIFF_A="0.04955"/>
      <bbk:Obs TIME_PERIOD="2014-12-09" OBS_VALUE="-2.46243" BBK_DIFF_A="0.06274"/>
      <bbk:Obs TIME_PERIOD="2014-12-08" OBS_VALUE="-2.52517" BBK_DIFF_A="0.03597"/>
      <bbk:Obs TIME_PERIOD="2014-12-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-12-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-12-05" OBS_VALUE="-2.56114" BBK_DIFF_A="0.04065"/>
      <bbk:Obs TIME_PERIOD="2014-12-04" OBS_VALUE="-2.60179" BBK_DIFF_A="-0.046"/>
      <bbk:Obs TIME_PERIOD="2014-12-03" OBS_VALUE="-2.55579" BBK_DIFF_A="0.00618"/>
      <bbk:Obs TIME_PERIOD="2014-12-02" OBS_VALUE="-2.56197" BBK_DIFF_A="-0.03542"/>
      <bbk:Obs TIME_PERIOD="2014-12-01" OBS_VALUE="-2.52655" BBK_DIFF_A="-0.00275"/>
      <bbk:Obs TIME_PERIOD="2014-11-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-11-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-11-28" OBS_VALUE="-2.5238" BBK_DIFF_A="0.02241"/>
      <bbk:Obs TIME_PERIOD="2014-11-27" OBS_VALUE="-2.54621" BBK_DIFF_A="0.06511"/>
      <bbk:Obs TIME_PERIOD="2014-11-26" OBS_VALUE="-2.61132" BBK_DIFF_A="0.03606"/>
      <bbk:Obs TIME_PERIOD="2014-11-25" OBS_VALUE="-2.64738" BBK_DIFF_A="0.02961"/>
      <bbk:Obs TIME_PERIOD="2014-11-24" OBS_VALUE="-2.67699" BBK_DIFF_A="-0.03355"/>
      <bbk:Obs TIME_PERIOD="2014-11-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-11-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-11-21" OBS_VALUE="-2.64344" BBK_DIFF_A="0.01502"/>
      <bbk:Obs TIME_PERIOD="2014-11-20" OBS_VALUE="-2.65846" BBK_DIFF_A="0.00711"/>
      <bbk:Obs TIME_PERIOD="2014-11-19" OBS_VALUE="-2.66557" BBK_DIFF_A="-0.00735"/>
      <bbk:Obs TIME_PERIOD="2014-11-18" OBS_VALUE="-2.65822" BBK_DIFF_A="-0.01596"/>
      <bbk:Obs TIME_PERIOD="2014-11-17" OBS_VALUE="-2.64226" BBK_DIFF_A="0.03765"/>
      <bbk:Obs TIME_PERIOD="2014-11-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-11-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-11-14" OBS_VALUE="-2.67991" BBK_DIFF_A="0.01707"/>
      <bbk:Obs TIME_PERIOD="2014-11-13" OBS_VALUE="-2.69698" BBK_DIFF_A="1.1E-4"/>
      <bbk:Obs TIME_PERIOD="2014-11-12" OBS_VALUE="-2.69709" BBK_DIFF_A="0.06567"/>
      <bbk:Obs TIME_PERIOD="2014-11-11" OBS_VALUE="-2.76276" BBK_DIFF_A="-0.02369"/>
      <bbk:Obs TIME_PERIOD="2014-11-10" OBS_VALUE="-2.73907" BBK_DIFF_A="0.05851"/>
      <bbk:Obs TIME_PERIOD="2014-11-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-11-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-11-07" OBS_VALUE="-2.79758" BBK_DIFF_A="-0.02788"/>
      <bbk:Obs TIME_PERIOD="2014-11-06" OBS_VALUE="-2.7697" BBK_DIFF_A="-0.01332"/>
      <bbk:Obs TIME_PERIOD="2014-11-05" OBS_VALUE="-2.75638" BBK_DIFF_A="-0.02733"/>
      <bbk:Obs TIME_PERIOD="2014-11-04" OBS_VALUE="-2.72905" BBK_DIFF_A="0.00465"/>
      <bbk:Obs TIME_PERIOD="2014-11-03" OBS_VALUE="-2.7337" BBK_DIFF_A="-0.00359"/>
      <bbk:Obs TIME_PERIOD="2014-11-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-11-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-10-31" OBS_VALUE="-2.73011" BBK_DIFF_A="0.02568"/>
      <bbk:Obs TIME_PERIOD="2014-10-30" OBS_VALUE="-2.75579" BBK_DIFF_A="0.00585"/>
      <bbk:Obs TIME_PERIOD="2014-10-29" OBS_VALUE="-2.76164" BBK_DIFF_A="-0.02065"/>
      <bbk:Obs TIME_PERIOD="2014-10-28" OBS_VALUE="-2.74099" BBK_DIFF_A="0.05393"/>
      <bbk:Obs TIME_PERIOD="2014-10-27" OBS_VALUE="-2.79492" BBK_DIFF_A="0.03023"/>
      <bbk:Obs TIME_PERIOD="2014-10-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-10-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-10-24" OBS_VALUE="-2.82515" BBK_DIFF_A="-0.01479"/>
      <bbk:Obs TIME_PERIOD="2014-10-23" OBS_VALUE="-2.81036" BBK_DIFF_A="-0.04256"/>
      <bbk:Obs TIME_PERIOD="2014-10-22" OBS_VALUE="-2.7678" BBK_DIFF_A="-0.01702"/>
      <bbk:Obs TIME_PERIOD="2014-10-21" OBS_VALUE="-2.75078" BBK_DIFF_A="0.00655"/>
      <bbk:Obs TIME_PERIOD="2014-10-20" OBS_VALUE="-2.75733" BBK_DIFF_A="-0.02943"/>
      <bbk:Obs TIME_PERIOD="2014-10-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-10-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-10-17" OBS_VALUE="-2.7279" BBK_DIFF_A="-0.21439"/>
      <bbk:Obs TIME_PERIOD="2014-10-16" OBS_VALUE="-2.51351" BBK_DIFF_A="0.21137"/>
      <bbk:Obs TIME_PERIOD="2014-10-15" OBS_VALUE="-2.72488" BBK_DIFF_A="-2.76812"/>
      <bbk:Obs TIME_PERIOD="2014-10-14" OBS_VALUE="0.04324" BBK_DIFF_A="0.00134"/>
      <bbk:Obs TIME_PERIOD="2014-10-13" OBS_VALUE="0.0419" BBK_DIFF_A="-0.00101"/>
      <bbk:Obs TIME_PERIOD="2014-10-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-10-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-10-10" OBS_VALUE="0.04291" BBK_DIFF_A="0.00278"/>
      <bbk:Obs TIME_PERIOD="2014-10-09" OBS_VALUE="0.04013" BBK_DIFF_A="-0.00238"/>
      <bbk:Obs TIME_PERIOD="2014-10-08" OBS_VALUE="0.04251" BBK_DIFF_A="-0.00661"/>
      <bbk:Obs TIME_PERIOD="2014-10-07" OBS_VALUE="0.04912" BBK_DIFF_A="0.01151"/>
      <bbk:Obs TIME_PERIOD="2014-10-06" OBS_VALUE="0.03761" BBK_DIFF_A="-0.00441"/>
      <bbk:Obs TIME_PERIOD="2014-10-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-10-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-10-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-10-02" OBS_VALUE="0.04202" BBK_DIFF_A="0.01001"/>
      <bbk:Obs TIME_PERIOD="2014-10-01" OBS_VALUE="0.03201" BBK_DIFF_A="-0.00206"/>
      <bbk:Obs TIME_PERIOD="2014-09-30" OBS_VALUE="0.03407" BBK_DIFF_A="-1.5E-4"/>
      <bbk:Obs TIME_PERIOD="2014-09-29" OBS_VALUE="0.03422" BBK_DIFF_A="-0.00127"/>
      <bbk:Obs TIME_PERIOD="2014-09-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-09-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-09-26" OBS_VALUE="0.03549" BBK_DIFF_A="-0.00492"/>
      <bbk:Obs TIME_PERIOD="2014-09-25" OBS_VALUE="0.04041" BBK_DIFF_A="0.03718"/>
      <bbk:Obs TIME_PERIOD="2014-09-24" OBS_VALUE="0.00323" BBK_DIFF_A="-0.00291"/>
      <bbk:Obs TIME_PERIOD="2014-09-23" OBS_VALUE="0.00614" BBK_DIFF_A="-5.3E-4"/>
      <bbk:Obs TIME_PERIOD="2014-09-22" OBS_VALUE="0.00667" BBK_DIFF_A="0.00419"/>
      <bbk:Obs TIME_PERIOD="2014-09-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-09-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-09-19" OBS_VALUE="0.00248" BBK_DIFF_A="-0.03722"/>
      <bbk:Obs TIME_PERIOD="2014-09-18" OBS_VALUE="0.0397" BBK_DIFF_A="0.01564"/>
      <bbk:Obs TIME_PERIOD="2014-09-17" OBS_VALUE="0.02406" BBK_DIFF_A="-0.01067"/>
      <bbk:Obs TIME_PERIOD="2014-09-16" OBS_VALUE="0.03473" BBK_DIFF_A="0.01297"/>
      <bbk:Obs TIME_PERIOD="2014-09-15" OBS_VALUE="0.02176" BBK_DIFF_A="0.00394"/>
      <bbk:Obs TIME_PERIOD="2014-09-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-09-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-09-12" OBS_VALUE="0.01782" BBK_DIFF_A="8.3E-4"/>
      <bbk:Obs TIME_PERIOD="2014-09-11" OBS_VALUE="0.01699" BBK_DIFF_A="-0.00824"/>
      <bbk:Obs TIME_PERIOD="2014-09-10" OBS_VALUE="0.02523" BBK_DIFF_A="0.01296"/>
      <bbk:Obs TIME_PERIOD="2014-09-09" OBS_VALUE="0.01227" BBK_DIFF_A="-0.01574"/>
      <bbk:Obs TIME_PERIOD="2014-09-08" OBS_VALUE="0.02801" BBK_DIFF_A="-0.00584"/>
      <bbk:Obs TIME_PERIOD="2014-09-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-09-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-09-05" OBS_VALUE="0.03385" BBK_DIFF_A="-0.04126"/>
      <bbk:Obs TIME_PERIOD="2014-09-04" OBS_VALUE="0.07511" BBK_DIFF_A="0.00548"/>
      <bbk:Obs TIME_PERIOD="2014-09-03" OBS_VALUE="0.06963" BBK_DIFF_A="0.00783"/>
      <bbk:Obs TIME_PERIOD="2014-09-02" OBS_VALUE="0.0618" BBK_DIFF_A="-0.00253"/>
      <bbk:Obs TIME_PERIOD="2014-09-01" OBS_VALUE="0.06433" BBK_DIFF_A="-6.2E-4"/>
      <bbk:Obs TIME_PERIOD="2014-08-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-08-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-08-29" OBS_VALUE="0.06495" BBK_DIFF_A="-0.00871"/>
      <bbk:Obs TIME_PERIOD="2014-08-28" OBS_VALUE="0.07366" BBK_DIFF_A="-7.0E-4"/>
      <bbk:Obs TIME_PERIOD="2014-08-27" OBS_VALUE="0.07436" BBK_DIFF_A="0.00639"/>
      <bbk:Obs TIME_PERIOD="2014-08-26" OBS_VALUE="0.06797" BBK_DIFF_A="6.4E-4"/>
      <bbk:Obs TIME_PERIOD="2014-08-25" OBS_VALUE="0.06733" BBK_DIFF_A="-0.02261"/>
      <bbk:Obs TIME_PERIOD="2014-08-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-08-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-08-22" OBS_VALUE="0.08994" BBK_DIFF_A="-0.00393"/>
      <bbk:Obs TIME_PERIOD="2014-08-21" OBS_VALUE="0.09387" BBK_DIFF_A="0.00175"/>
      <bbk:Obs TIME_PERIOD="2014-08-20" OBS_VALUE="0.09212" BBK_DIFF_A="-0.00654"/>
      <bbk:Obs TIME_PERIOD="2014-08-19" OBS_VALUE="0.09866" BBK_DIFF_A="-0.00382"/>
      <bbk:Obs TIME_PERIOD="2014-08-18" OBS_VALUE="0.10248" BBK_DIFF_A="-0.00212"/>
      <bbk:Obs TIME_PERIOD="2014-08-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-08-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-08-15" OBS_VALUE="0.1046" BBK_DIFF_A="-0.00415"/>
      <bbk:Obs TIME_PERIOD="2014-08-14" OBS_VALUE="0.10875" BBK_DIFF_A="0.00547"/>
      <bbk:Obs TIME_PERIOD="2014-08-13" OBS_VALUE="0.10328" BBK_DIFF_A="0.00421"/>
      <bbk:Obs TIME_PERIOD="2014-08-12" OBS_VALUE="0.09907" BBK_DIFF_A="-0.00196"/>
      <bbk:Obs TIME_PERIOD="2014-08-11" OBS_VALUE="0.10103" BBK_DIFF_A="-6.1E-4"/>
      <bbk:Obs TIME_PERIOD="2014-08-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-08-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-08-08" OBS_VALUE="0.10164" BBK_DIFF_A="0.10162"/>
      <bbk:Obs TIME_PERIOD="2014-08-07" OBS_VALUE="2.0E-5" BBK_DIFF_A="3.0E-4"/>
      <bbk:Obs TIME_PERIOD="2014-08-06" OBS_VALUE="-2.8E-4" BBK_DIFF_A="-0.00221"/>
      <bbk:Obs TIME_PERIOD="2014-08-05" OBS_VALUE="0.00193" BBK_DIFF_A="0.00101"/>
      <bbk:Obs TIME_PERIOD="2014-08-04" OBS_VALUE="9.2E-4" BBK_DIFF_A="5.0E-4"/>
      <bbk:Obs TIME_PERIOD="2014-08-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-08-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-08-01" OBS_VALUE="4.2E-4" BBK_DIFF_A="-3.8E-4"/>
      <bbk:Obs TIME_PERIOD="2014-07-31" OBS_VALUE="8.0E-4" BBK_DIFF_A="-0.00203"/>
      <bbk:Obs TIME_PERIOD="2014-07-30" OBS_VALUE="0.00283" BBK_DIFF_A="-0.0026"/>
      <bbk:Obs TIME_PERIOD="2014-07-29" OBS_VALUE="0.00543" BBK_DIFF_A="0.00248"/>
      <bbk:Obs TIME_PERIOD="2014-07-28" OBS_VALUE="0.00295" BBK_DIFF_A="0.00302"/>
      <bbk:Obs TIME_PERIOD="2014-07-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-07-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-07-25" OBS_VALUE="-7.0E-5" BBK_DIFF_A="-0.00193"/>
      <bbk:Obs TIME_PERIOD="2014-07-24" OBS_VALUE="0.00186" BBK_DIFF_A="0.00184"/>
      <bbk:Obs TIME_PERIOD="2014-07-23" OBS_VALUE="2.0E-5" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2014-07-22" OBS_VALUE="2.0E-5" BBK_DIFF_A="1.0E-5"/>
      <bbk:Obs TIME_PERIOD="2014-07-21" OBS_VALUE="1.0E-5" BBK_DIFF_A="3.7E-4"/>
      <bbk:Obs TIME_PERIOD="2014-07-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-07-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-07-18" OBS_VALUE="-3.6E-4" BBK_DIFF_A="-1.7E-4"/>
      <bbk:Obs TIME_PERIOD="2014-07-17" OBS_VALUE="-1.9E-4" BBK_DIFF_A="-7.0E-5"/>
      <bbk:Obs TIME_PERIOD="2014-07-16" OBS_VALUE="-1.2E-4" BBK_DIFF_A="0.00186"/>
      <bbk:Obs TIME_PERIOD="2014-07-15" OBS_VALUE="-0.00198" BBK_DIFF_A="0.02943"/>
      <bbk:Obs TIME_PERIOD="2014-07-14" OBS_VALUE="-0.03141" BBK_DIFF_A="-0.01569"/>
      <bbk:Obs TIME_PERIOD="2014-07-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-07-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-07-11" OBS_VALUE="-0.01572" BBK_DIFF_A="0.00328"/>
      <bbk:Obs TIME_PERIOD="2014-07-10" OBS_VALUE="-0.019" BBK_DIFF_A="0.03505"/>
      <bbk:Obs TIME_PERIOD="2014-07-09" OBS_VALUE="-0.05405" BBK_DIFF_A="0.05292"/>
      <bbk:Obs TIME_PERIOD="2014-07-08" OBS_VALUE="-0.10697" BBK_DIFF_A="0.01748"/>
      <bbk:Obs TIME_PERIOD="2014-07-07" OBS_VALUE="-0.12445" BBK_DIFF_A="0.00314"/>
      <bbk:Obs TIME_PERIOD="2014-07-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-07-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-07-04" OBS_VALUE="-0.12759" BBK_DIFF_A="0.01486"/>
      <bbk:Obs TIME_PERIOD="2014-07-03" OBS_VALUE="-0.14245" BBK_DIFF_A="-0.05629"/>
      <bbk:Obs TIME_PERIOD="2014-07-02" OBS_VALUE="-0.08616" BBK_DIFF_A="-0.00501"/>
      <bbk:Obs TIME_PERIOD="2014-07-01" OBS_VALUE="-0.08115" BBK_DIFF_A="-0.00226"/>
      <bbk:Obs TIME_PERIOD="2014-06-30" OBS_VALUE="-0.07889" BBK_DIFF_A="0.00512"/>
      <bbk:Obs TIME_PERIOD="2014-06-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-06-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-06-27" OBS_VALUE="-0.08401" BBK_DIFF_A="0.01206"/>
      <bbk:Obs TIME_PERIOD="2014-06-26" OBS_VALUE="-0.09607" BBK_DIFF_A="0.05596"/>
      <bbk:Obs TIME_PERIOD="2014-06-25" OBS_VALUE="-0.15203" BBK_DIFF_A="0.01609"/>
      <bbk:Obs TIME_PERIOD="2014-06-24" OBS_VALUE="-0.16812" BBK_DIFF_A="0.01286"/>
      <bbk:Obs TIME_PERIOD="2014-06-23" OBS_VALUE="-0.18098" BBK_DIFF_A="-0.01409"/>
      <bbk:Obs TIME_PERIOD="2014-06-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-06-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-06-20" OBS_VALUE="-0.16689" BBK_DIFF_A="-0.00789"/>
      <bbk:Obs TIME_PERIOD="2014-06-19" OBS_VALUE="-0.159" BBK_DIFF_A="0.06665"/>
      <bbk:Obs TIME_PERIOD="2014-06-18" OBS_VALUE="-0.22565" BBK_DIFF_A="4.0E-4"/>
      <bbk:Obs TIME_PERIOD="2014-06-17" OBS_VALUE="-0.22605" BBK_DIFF_A="-0.02745"/>
      <bbk:Obs TIME_PERIOD="2014-06-16" OBS_VALUE="-0.1986" BBK_DIFF_A="0.02398"/>
      <bbk:Obs TIME_PERIOD="2014-06-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-06-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-06-13" OBS_VALUE="-0.22258" BBK_DIFF_A="0.01869"/>
      <bbk:Obs TIME_PERIOD="2014-06-12" OBS_VALUE="-0.24127" BBK_DIFF_A="-0.02867"/>
      <bbk:Obs TIME_PERIOD="2014-06-11" OBS_VALUE="-0.2126" BBK_DIFF_A="-0.04901"/>
      <bbk:Obs TIME_PERIOD="2014-06-10" OBS_VALUE="-0.16359" BBK_DIFF_A="-0.01514"/>
      <bbk:Obs TIME_PERIOD="2014-06-09" OBS_VALUE="-0.14845" BBK_DIFF_A="0.02028"/>
      <bbk:Obs TIME_PERIOD="2014-06-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-06-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-06-06" OBS_VALUE="-0.16873" BBK_DIFF_A="0.05019"/>
      <bbk:Obs TIME_PERIOD="2014-06-05" OBS_VALUE="-0.21892" BBK_DIFF_A="0.03401"/>
      <bbk:Obs TIME_PERIOD="2014-06-04" OBS_VALUE="-0.25293" BBK_DIFF_A="-0.12854"/>
      <bbk:Obs TIME_PERIOD="2014-06-03" OBS_VALUE="-0.12439" BBK_DIFF_A="-0.04084"/>
      <bbk:Obs TIME_PERIOD="2014-06-02" OBS_VALUE="-0.08355" BBK_DIFF_A="0.01462"/>
      <bbk:Obs TIME_PERIOD="2014-06-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-05-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-05-30" OBS_VALUE="-0.09817" BBK_DIFF_A="-0.04918"/>
      <bbk:Obs TIME_PERIOD="2014-05-29" OBS_VALUE="-0.04899" BBK_DIFF_A="0.22976"/>
      <bbk:Obs TIME_PERIOD="2014-05-28" OBS_VALUE="-0.27875" BBK_DIFF_A="0.12348"/>
      <bbk:Obs TIME_PERIOD="2014-05-27" OBS_VALUE="-0.40223" BBK_DIFF_A="0.03026"/>
      <bbk:Obs TIME_PERIOD="2014-05-26" OBS_VALUE="-0.43249" BBK_DIFF_A="0.01355"/>
      <bbk:Obs TIME_PERIOD="2014-05-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-05-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-05-23" OBS_VALUE="-0.44604" BBK_DIFF_A="-0.06584"/>
      <bbk:Obs TIME_PERIOD="2014-05-22" OBS_VALUE="-0.3802" BBK_DIFF_A="0.035"/>
      <bbk:Obs TIME_PERIOD="2014-05-21" OBS_VALUE="-0.4152" BBK_DIFF_A="-0.21778"/>
      <bbk:Obs TIME_PERIOD="2014-05-20" OBS_VALUE="-0.19742" BBK_DIFF_A="0.03482"/>
      <bbk:Obs TIME_PERIOD="2014-05-19" OBS_VALUE="-0.23224" BBK_DIFF_A="-0.06945"/>
      <bbk:Obs TIME_PERIOD="2014-05-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-05-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-05-16" OBS_VALUE="-0.16279" BBK_DIFF_A="0.02212"/>
      <bbk:Obs TIME_PERIOD="2014-05-15" OBS_VALUE="-0.18491" BBK_DIFF_A="0.23485"/>
      <bbk:Obs TIME_PERIOD="2014-05-14" OBS_VALUE="-0.41976" BBK_DIFF_A="0.07582"/>
      <bbk:Obs TIME_PERIOD="2014-05-13" OBS_VALUE="-0.49558" BBK_DIFF_A="0.04659"/>
      <bbk:Obs TIME_PERIOD="2014-05-12" OBS_VALUE="-0.54217" BBK_DIFF_A="0.15178"/>
      <bbk:Obs TIME_PERIOD="2014-05-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-05-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-05-09" OBS_VALUE="-0.69395" BBK_DIFF_A="-0.0016"/>
      <bbk:Obs TIME_PERIOD="2014-05-08" OBS_VALUE="-0.69235" BBK_DIFF_A="-0.04975"/>
      <bbk:Obs TIME_PERIOD="2014-05-07" OBS_VALUE="-0.6426" BBK_DIFF_A="-0.02371"/>
      <bbk:Obs TIME_PERIOD="2014-05-06" OBS_VALUE="-0.61889" BBK_DIFF_A="0.0592"/>
      <bbk:Obs TIME_PERIOD="2014-05-05" OBS_VALUE="-0.67809" BBK_DIFF_A="-0.0235"/>
      <bbk:Obs TIME_PERIOD="2014-05-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-05-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-05-02" OBS_VALUE="-0.65459" BBK_DIFF_A="-0.01958"/>
      <bbk:Obs TIME_PERIOD="2014-05-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-04-30" OBS_VALUE="-0.63501" BBK_DIFF_A="0.09851"/>
      <bbk:Obs TIME_PERIOD="2014-04-29" OBS_VALUE="-0.73352" BBK_DIFF_A="-0.16059"/>
      <bbk:Obs TIME_PERIOD="2014-04-28" OBS_VALUE="-0.57293" BBK_DIFF_A="0.12234"/>
      <bbk:Obs TIME_PERIOD="2014-04-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-04-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-04-25" OBS_VALUE="-0.69527" BBK_DIFF_A="-0.17897"/>
      <bbk:Obs TIME_PERIOD="2014-04-24" OBS_VALUE="-0.5163" BBK_DIFF_A="0.09133"/>
      <bbk:Obs TIME_PERIOD="2014-04-23" OBS_VALUE="-0.60763" BBK_DIFF_A="-0.0468"/>
      <bbk:Obs TIME_PERIOD="2014-04-22" OBS_VALUE="-0.56083" BBK_DIFF_A="0.00209"/>
      <bbk:Obs TIME_PERIOD="2014-04-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-04-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-04-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-04-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-04-17" OBS_VALUE="-0.56292" BBK_DIFF_A="0.0637"/>
      <bbk:Obs TIME_PERIOD="2014-04-16" OBS_VALUE="-0.62662" BBK_DIFF_A="0.01535"/>
      <bbk:Obs TIME_PERIOD="2014-04-15" OBS_VALUE="-0.64197" BBK_DIFF_A="-0.06056"/>
      <bbk:Obs TIME_PERIOD="2014-04-14" OBS_VALUE="-0.58141" BBK_DIFF_A="0.06265"/>
      <bbk:Obs TIME_PERIOD="2014-04-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-04-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-04-11" OBS_VALUE="-0.64406" BBK_DIFF_A="-0.01241"/>
      <bbk:Obs TIME_PERIOD="2014-04-10" OBS_VALUE="-0.63165" BBK_DIFF_A="0.22237"/>
      <bbk:Obs TIME_PERIOD="2014-04-09" OBS_VALUE="-0.85402" BBK_DIFF_A="-0.22604"/>
      <bbk:Obs TIME_PERIOD="2014-04-08" OBS_VALUE="-0.62798" BBK_DIFF_A="0.02146"/>
      <bbk:Obs TIME_PERIOD="2014-04-07" OBS_VALUE="-0.64944" BBK_DIFF_A="0.16175"/>
      <bbk:Obs TIME_PERIOD="2014-04-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-04-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-04-04" OBS_VALUE="-0.81119" BBK_DIFF_A="0.11781"/>
      <bbk:Obs TIME_PERIOD="2014-04-03" OBS_VALUE="-0.929" BBK_DIFF_A="-0.07921"/>
      <bbk:Obs TIME_PERIOD="2014-04-02" OBS_VALUE="-0.84979" BBK_DIFF_A="-0.0615"/>
      <bbk:Obs TIME_PERIOD="2014-04-01" OBS_VALUE="-0.78829" BBK_DIFF_A="-0.11713"/>
      <bbk:Obs TIME_PERIOD="2014-03-31" OBS_VALUE="-0.67116" BBK_DIFF_A="-0.0064"/>
      <bbk:Obs TIME_PERIOD="2014-03-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-03-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-03-28" OBS_VALUE="-0.66476" BBK_DIFF_A="-0.13498"/>
      <bbk:Obs TIME_PERIOD="2014-03-27" OBS_VALUE="-0.52978" BBK_DIFF_A="0.1083"/>
      <bbk:Obs TIME_PERIOD="2014-03-26" OBS_VALUE="-0.63808" BBK_DIFF_A="0.02112"/>
      <bbk:Obs TIME_PERIOD="2014-03-25" OBS_VALUE="-0.6592" BBK_DIFF_A="0.21725"/>
      <bbk:Obs TIME_PERIOD="2014-03-24" OBS_VALUE="-0.87645" BBK_DIFF_A="-0.14963"/>
      <bbk:Obs TIME_PERIOD="2014-03-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-03-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-03-21" OBS_VALUE="-0.72682" BBK_DIFF_A="0.16393"/>
      <bbk:Obs TIME_PERIOD="2014-03-20" OBS_VALUE="-0.89075" BBK_DIFF_A="-0.27219"/>
      <bbk:Obs TIME_PERIOD="2014-03-19" OBS_VALUE="-0.61856" BBK_DIFF_A="-0.02906"/>
      <bbk:Obs TIME_PERIOD="2014-03-18" OBS_VALUE="-0.5895" BBK_DIFF_A="-0.0592"/>
      <bbk:Obs TIME_PERIOD="2014-03-17" OBS_VALUE="-0.5303" BBK_DIFF_A="0.04548"/>
      <bbk:Obs TIME_PERIOD="2014-03-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-03-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-03-14" OBS_VALUE="-0.57578" BBK_DIFF_A="0.0859"/>
      <bbk:Obs TIME_PERIOD="2014-03-13" OBS_VALUE="-0.66168" BBK_DIFF_A="0.09682"/>
      <bbk:Obs TIME_PERIOD="2014-03-12" OBS_VALUE="-0.7585" BBK_DIFF_A="0.04659"/>
      <bbk:Obs TIME_PERIOD="2014-03-11" OBS_VALUE="-0.80509" BBK_DIFF_A="-0.07813"/>
      <bbk:Obs TIME_PERIOD="2014-03-10" OBS_VALUE="-0.72696" BBK_DIFF_A="0.11306"/>
      <bbk:Obs TIME_PERIOD="2014-03-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-03-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-03-07" OBS_VALUE="-0.84002" BBK_DIFF_A="0.14798"/>
      <bbk:Obs TIME_PERIOD="2014-03-06" OBS_VALUE="-0.988" BBK_DIFF_A="0.01055"/>
      <bbk:Obs TIME_PERIOD="2014-03-05" OBS_VALUE="-0.99855" BBK_DIFF_A="-0.09285"/>
      <bbk:Obs TIME_PERIOD="2014-03-04" OBS_VALUE="-0.9057" BBK_DIFF_A="-0.0194"/>
      <bbk:Obs TIME_PERIOD="2014-03-03" OBS_VALUE="-0.8863" BBK_DIFF_A="0.02304"/>
      <bbk:Obs TIME_PERIOD="2014-03-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-03-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-02-28" OBS_VALUE="-0.90934" BBK_DIFF_A="-0.04743"/>
      <bbk:Obs TIME_PERIOD="2014-02-27" OBS_VALUE="-0.86191" BBK_DIFF_A="0.25304"/>
      <bbk:Obs TIME_PERIOD="2014-02-26" OBS_VALUE="-1.11495" BBK_DIFF_A="-0.71541"/>
      <bbk:Obs TIME_PERIOD="2014-02-25" OBS_VALUE="-0.39954" BBK_DIFF_A="-0.03005"/>
      <bbk:Obs TIME_PERIOD="2014-02-24" OBS_VALUE="-0.36949" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2014-02-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-02-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-02-21" OBS_VALUE="-0.36949" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2014-02-20" OBS_VALUE="-0.36949" BBK_DIFF_A="-0.01187"/>
      <bbk:Obs TIME_PERIOD="2014-02-19" OBS_VALUE="-0.35762" BBK_DIFF_A="0.21345"/>
      <bbk:Obs TIME_PERIOD="2014-02-18" OBS_VALUE="-0.57107" BBK_DIFF_A="-0.10257"/>
      <bbk:Obs TIME_PERIOD="2014-02-17" OBS_VALUE="-0.4685" BBK_DIFF_A="0.12551"/>
      <bbk:Obs TIME_PERIOD="2014-02-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-02-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-02-14" OBS_VALUE="-0.59401" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2014-02-13" OBS_VALUE="-0.59401" BBK_DIFF_A="-0.19835"/>
      <bbk:Obs TIME_PERIOD="2014-02-12" OBS_VALUE="-0.39566" BBK_DIFF_A="-0.05189"/>
      <bbk:Obs TIME_PERIOD="2014-02-11" OBS_VALUE="-0.34377" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2014-02-10" OBS_VALUE="-0.34377" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2014-02-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-02-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-02-07" OBS_VALUE="-0.34377" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2014-02-06" OBS_VALUE="-0.34377" BBK_DIFF_A="-0.04679"/>
      <bbk:Obs TIME_PERIOD="2014-02-05" OBS_VALUE="-0.29698" BBK_DIFF_A="0.22257"/>
      <bbk:Obs TIME_PERIOD="2014-02-04" OBS_VALUE="-0.51955" BBK_DIFF_A="0.12061"/>
      <bbk:Obs TIME_PERIOD="2014-02-03" OBS_VALUE="-0.64016" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2014-02-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-02-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-01-31" OBS_VALUE="-0.64016" BBK_DIFF_A="0.15744"/>
      <bbk:Obs TIME_PERIOD="2014-01-30" OBS_VALUE="-0.7976" BBK_DIFF_A="0.08318"/>
      <bbk:Obs TIME_PERIOD="2014-01-29" OBS_VALUE="-0.88078" BBK_DIFF_A="-0.12917"/>
      <bbk:Obs TIME_PERIOD="2014-01-28" OBS_VALUE="-0.75161" BBK_DIFF_A="-0.18233"/>
      <bbk:Obs TIME_PERIOD="2014-01-27" OBS_VALUE="-0.56928" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2014-01-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-01-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-01-24" OBS_VALUE="-0.56928" BBK_DIFF_A="0.36308"/>
      <bbk:Obs TIME_PERIOD="2014-01-23" OBS_VALUE="-0.93236" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2014-01-22" OBS_VALUE="-0.93236" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2014-01-21" OBS_VALUE="-0.93236" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2014-01-20" OBS_VALUE="-0.93236" BBK_DIFF_A="-0.05223"/>
      <bbk:Obs TIME_PERIOD="2014-01-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-01-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-01-17" OBS_VALUE="-0.88013" BBK_DIFF_A="-0.08002"/>
      <bbk:Obs TIME_PERIOD="2014-01-16" OBS_VALUE="-0.80011" BBK_DIFF_A="-0.19796"/>
      <bbk:Obs TIME_PERIOD="2014-01-15" OBS_VALUE="-0.60215" BBK_DIFF_A="0.28907"/>
      <bbk:Obs TIME_PERIOD="2014-01-14" OBS_VALUE="-0.89122" BBK_DIFF_A="-0.27609"/>
      <bbk:Obs TIME_PERIOD="2014-01-13" OBS_VALUE="-0.61513" BBK_DIFF_A="0.00142"/>
      <bbk:Obs TIME_PERIOD="2014-01-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-01-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-01-10" OBS_VALUE="-0.61655" BBK_DIFF_A="0.02727"/>
      <bbk:Obs TIME_PERIOD="2014-01-09" OBS_VALUE="-0.64382" BBK_DIFF_A="0.00446"/>
      <bbk:Obs TIME_PERIOD="2014-01-08" OBS_VALUE="-0.64828" BBK_DIFF_A="0.01009"/>
      <bbk:Obs TIME_PERIOD="2014-01-07" OBS_VALUE="-0.65837" BBK_DIFF_A="-0.04198"/>
      <bbk:Obs TIME_PERIOD="2014-01-06" OBS_VALUE="-0.61639" BBK_DIFF_A="0.02436"/>
      <bbk:Obs TIME_PERIOD="2014-01-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-01-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-01-03" OBS_VALUE="-0.64075" BBK_DIFF_A="-0.02931"/>
      <bbk:Obs TIME_PERIOD="2014-01-02" OBS_VALUE="-0.61144" BBK_DIFF_A="0.01532"/>
      <bbk:Obs TIME_PERIOD="2014-01-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-12-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-12-30" OBS_VALUE="-0.62676" BBK_DIFF_A="0.13516"/>
      <bbk:Obs TIME_PERIOD="2013-12-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-12-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-12-27" OBS_VALUE="-0.76192" BBK_DIFF_A="-0.09243"/>
      <bbk:Obs TIME_PERIOD="2013-12-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-12-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-12-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-12-23" OBS_VALUE="-0.66949" BBK_DIFF_A="-0.06506"/>
      <bbk:Obs TIME_PERIOD="2013-12-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-12-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-12-20" OBS_VALUE="-0.60443" BBK_DIFF_A="0.09039"/>
      <bbk:Obs TIME_PERIOD="2013-12-19" OBS_VALUE="-0.69482" BBK_DIFF_A="-0.09076"/>
      <bbk:Obs TIME_PERIOD="2013-12-18" OBS_VALUE="-0.60406" BBK_DIFF_A="-0.06053"/>
      <bbk:Obs TIME_PERIOD="2013-12-17" OBS_VALUE="-0.54353" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2013-12-16" OBS_VALUE="-0.54353" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2013-12-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-12-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-12-13" OBS_VALUE="-0.54353" BBK_DIFF_A="-0.00935"/>
      <bbk:Obs TIME_PERIOD="2013-12-12" OBS_VALUE="-0.53418" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2013-12-11" OBS_VALUE="-0.53418" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2013-12-10" OBS_VALUE="-0.53418" BBK_DIFF_A="0.04077"/>
      <bbk:Obs TIME_PERIOD="2013-12-09" OBS_VALUE="-0.57495" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2013-12-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-12-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-12-06" OBS_VALUE="-0.57495" BBK_DIFF_A="-0.02716"/>
      <bbk:Obs TIME_PERIOD="2013-12-05" OBS_VALUE="-0.54779" BBK_DIFF_A="-0.05078"/>
      <bbk:Obs TIME_PERIOD="2013-12-04" OBS_VALUE="-0.49701" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2013-12-03" OBS_VALUE="-0.49701" BBK_DIFF_A="-0.02333"/>
      <bbk:Obs TIME_PERIOD="2013-12-02" OBS_VALUE="-0.47368" BBK_DIFF_A="-0.01107"/>
      <bbk:Obs TIME_PERIOD="2013-12-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-11-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-11-29" OBS_VALUE="-0.46261" BBK_DIFF_A="0.04014"/>
      <bbk:Obs TIME_PERIOD="2013-11-28" OBS_VALUE="-0.50275" BBK_DIFF_A="-0.02588"/>
      <bbk:Obs TIME_PERIOD="2013-11-27" OBS_VALUE="-0.47687" BBK_DIFF_A="0.01576"/>
      <bbk:Obs TIME_PERIOD="2013-11-26" OBS_VALUE="-0.49263" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2013-11-25" OBS_VALUE="-0.49263" BBK_DIFF_A="0.06869"/>
      <bbk:Obs TIME_PERIOD="2013-11-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-11-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-11-22" OBS_VALUE="-0.56132" BBK_DIFF_A="0.02"/>
      <bbk:Obs TIME_PERIOD="2013-11-21" OBS_VALUE="-0.58132" BBK_DIFF_A="-0.02259"/>
      <bbk:Obs TIME_PERIOD="2013-11-20" OBS_VALUE="-0.55873" BBK_DIFF_A="-0.0381"/>
      <bbk:Obs TIME_PERIOD="2013-11-19" OBS_VALUE="-0.52063" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2013-11-18" OBS_VALUE="-0.52063" BBK_DIFF_A="-0.00105"/>
      <bbk:Obs TIME_PERIOD="2013-11-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-11-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-11-15" OBS_VALUE="-0.51958" BBK_DIFF_A="0.01933"/>
      <bbk:Obs TIME_PERIOD="2013-11-14" OBS_VALUE="-0.53891" BBK_DIFF_A="0.06673"/>
      <bbk:Obs TIME_PERIOD="2013-11-13" OBS_VALUE="-0.60564" BBK_DIFF_A="-0.01305"/>
      <bbk:Obs TIME_PERIOD="2013-11-12" OBS_VALUE="-0.59259" BBK_DIFF_A="-0.05112"/>
      <bbk:Obs TIME_PERIOD="2013-11-11" OBS_VALUE="-0.54147" BBK_DIFF_A="-0.0407"/>
      <bbk:Obs TIME_PERIOD="2013-11-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-11-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-11-08" OBS_VALUE="-0.50077" BBK_DIFF_A="0.04248"/>
      <bbk:Obs TIME_PERIOD="2013-11-07" OBS_VALUE="-0.54325" BBK_DIFF_A="-0.0301"/>
      <bbk:Obs TIME_PERIOD="2013-11-06" OBS_VALUE="-0.51315" BBK_DIFF_A="-0.02553"/>
      <bbk:Obs TIME_PERIOD="2013-11-05" OBS_VALUE="-0.48762" BBK_DIFF_A="-0.02629"/>
      <bbk:Obs TIME_PERIOD="2013-11-04" OBS_VALUE="-0.46133" BBK_DIFF_A="0.00482"/>
      <bbk:Obs TIME_PERIOD="2013-11-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-11-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-11-01" OBS_VALUE="-0.46615" BBK_DIFF_A="-0.02538"/>
      <bbk:Obs TIME_PERIOD="2013-10-31" OBS_VALUE="-0.44077" BBK_DIFF_A="0.03807"/>
      <bbk:Obs TIME_PERIOD="2013-10-30" OBS_VALUE="-0.47884" BBK_DIFF_A="0.03401"/>
      <bbk:Obs TIME_PERIOD="2013-10-29" OBS_VALUE="-0.51285" BBK_DIFF_A="1.1E-4"/>
      <bbk:Obs TIME_PERIOD="2013-10-28" OBS_VALUE="-0.51296" BBK_DIFF_A="0.01366"/>
      <bbk:Obs TIME_PERIOD="2013-10-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-10-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-10-25" OBS_VALUE="-0.52662" BBK_DIFF_A="0.01952"/>
      <bbk:Obs TIME_PERIOD="2013-10-24" OBS_VALUE="-0.54614" BBK_DIFF_A="0.01182"/>
      <bbk:Obs TIME_PERIOD="2013-10-23" OBS_VALUE="-0.55796" BBK_DIFF_A="0.07388"/>
      <bbk:Obs TIME_PERIOD="2013-10-22" OBS_VALUE="-0.63184" BBK_DIFF_A="0.01441"/>
      <bbk:Obs TIME_PERIOD="2013-10-21" OBS_VALUE="-0.64625" BBK_DIFF_A="-0.01463"/>
      <bbk:Obs TIME_PERIOD="2013-10-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-10-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-10-18" OBS_VALUE="-0.63162" BBK_DIFF_A="0.0456"/>
      <bbk:Obs TIME_PERIOD="2013-10-17" OBS_VALUE="-0.67722" BBK_DIFF_A="0.02238"/>
      <bbk:Obs TIME_PERIOD="2013-10-16" OBS_VALUE="-0.6996" BBK_DIFF_A="-0.01859"/>
      <bbk:Obs TIME_PERIOD="2013-10-15" OBS_VALUE="-0.68101" BBK_DIFF_A="-0.04335"/>
      <bbk:Obs TIME_PERIOD="2013-10-14" OBS_VALUE="-0.63766" BBK_DIFF_A="0.01504"/>
      <bbk:Obs TIME_PERIOD="2013-10-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-10-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-10-11" OBS_VALUE="-0.6527" BBK_DIFF_A="-0.01974"/>
      <bbk:Obs TIME_PERIOD="2013-10-10" OBS_VALUE="-0.63296" BBK_DIFF_A="-0.06528"/>
      <bbk:Obs TIME_PERIOD="2013-10-09" OBS_VALUE="-0.56768" BBK_DIFF_A="0.03255"/>
      <bbk:Obs TIME_PERIOD="2013-10-08" OBS_VALUE="-0.60023" BBK_DIFF_A="-0.01389"/>
      <bbk:Obs TIME_PERIOD="2013-10-07" OBS_VALUE="-0.58634" BBK_DIFF_A="0.01307"/>
      <bbk:Obs TIME_PERIOD="2013-10-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-10-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-10-04" OBS_VALUE="-0.59941" BBK_DIFF_A="-0.01227"/>
      <bbk:Obs TIME_PERIOD="2013-10-03" OBS_VALUE="-0.58714" BBK_DIFF_A="-0.05647"/>
      <bbk:Obs TIME_PERIOD="2013-10-02" OBS_VALUE="-0.53067" BBK_DIFF_A="0.00259"/>
      <bbk:Obs TIME_PERIOD="2013-10-01" OBS_VALUE="-0.53326" BBK_DIFF_A="-0.10406"/>
      <bbk:Obs TIME_PERIOD="2013-09-30" OBS_VALUE="-0.4292" BBK_DIFF_A="0.03243"/>
      <bbk:Obs TIME_PERIOD="2013-09-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-09-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-09-27" OBS_VALUE="-0.46163" BBK_DIFF_A="0.03624"/>
      <bbk:Obs TIME_PERIOD="2013-09-26" OBS_VALUE="-0.49787" BBK_DIFF_A="0.02231"/>
      <bbk:Obs TIME_PERIOD="2013-09-25" OBS_VALUE="-0.52018" BBK_DIFF_A="0.04255"/>
      <bbk:Obs TIME_PERIOD="2013-09-24" OBS_VALUE="-0.56273" BBK_DIFF_A="0.07638"/>
      <bbk:Obs TIME_PERIOD="2013-09-23" OBS_VALUE="-0.63911" BBK_DIFF_A="0.00824"/>
      <bbk:Obs TIME_PERIOD="2013-09-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-09-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-09-20" OBS_VALUE="-0.64735" BBK_DIFF_A="-0.06355"/>
      <bbk:Obs TIME_PERIOD="2013-09-19" OBS_VALUE="-0.5838" BBK_DIFF_A="0.0536"/>
      <bbk:Obs TIME_PERIOD="2013-09-18" OBS_VALUE="-0.6374" BBK_DIFF_A="-0.02796"/>
      <bbk:Obs TIME_PERIOD="2013-09-17" OBS_VALUE="-0.60944" BBK_DIFF_A="-0.02583"/>
      <bbk:Obs TIME_PERIOD="2013-09-16" OBS_VALUE="-0.58361" BBK_DIFF_A="0.08548"/>
      <bbk:Obs TIME_PERIOD="2013-09-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-09-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-09-13" OBS_VALUE="-0.66909" BBK_DIFF_A="0.00324"/>
      <bbk:Obs TIME_PERIOD="2013-09-12" OBS_VALUE="-0.67233" BBK_DIFF_A="0.0405"/>
      <bbk:Obs TIME_PERIOD="2013-09-11" OBS_VALUE="-0.71283" BBK_DIFF_A="-0.02204"/>
      <bbk:Obs TIME_PERIOD="2013-09-10" OBS_VALUE="-0.69079" BBK_DIFF_A="-0.03553"/>
      <bbk:Obs TIME_PERIOD="2013-09-09" OBS_VALUE="-0.65526" BBK_DIFF_A="0.02493"/>
      <bbk:Obs TIME_PERIOD="2013-09-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-09-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-09-06" OBS_VALUE="-0.68019" BBK_DIFF_A="-0.02823"/>
      <bbk:Obs TIME_PERIOD="2013-09-05" OBS_VALUE="-0.65196" BBK_DIFF_A="-0.0178"/>
      <bbk:Obs TIME_PERIOD="2013-09-04" OBS_VALUE="-0.63416" BBK_DIFF_A="0.09229"/>
      <bbk:Obs TIME_PERIOD="2013-09-03" OBS_VALUE="-0.72645" BBK_DIFF_A="0.09549"/>
      <bbk:Obs TIME_PERIOD="2013-09-02" OBS_VALUE="-0.82194" BBK_DIFF_A="0.08549"/>
      <bbk:Obs TIME_PERIOD="2013-09-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-08-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-08-30" OBS_VALUE="-0.90743" BBK_DIFF_A="-0.08862"/>
      <bbk:Obs TIME_PERIOD="2013-08-29" OBS_VALUE="-0.81881" BBK_DIFF_A="-0.21185"/>
      <bbk:Obs TIME_PERIOD="2013-08-28" OBS_VALUE="-0.60696" BBK_DIFF_A="0.12996"/>
      <bbk:Obs TIME_PERIOD="2013-08-27" OBS_VALUE="-0.73692" BBK_DIFF_A="0.33326"/>
      <bbk:Obs TIME_PERIOD="2013-08-26" OBS_VALUE="-1.07018" BBK_DIFF_A="-0.24563"/>
      <bbk:Obs TIME_PERIOD="2013-08-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-08-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-08-23" OBS_VALUE="-0.82455" BBK_DIFF_A="0.21961"/>
      <bbk:Obs TIME_PERIOD="2013-08-22" OBS_VALUE="-1.04416" BBK_DIFF_A="-0.21539"/>
      <bbk:Obs TIME_PERIOD="2013-08-21" OBS_VALUE="-0.82877" BBK_DIFF_A="-0.24264"/>
      <bbk:Obs TIME_PERIOD="2013-08-20" OBS_VALUE="-0.58613" BBK_DIFF_A="0.00277"/>
      <bbk:Obs TIME_PERIOD="2013-08-19" OBS_VALUE="-0.5889" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2013-08-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-08-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-08-16" OBS_VALUE="-0.5889" BBK_DIFF_A="-0.03184"/>
      <bbk:Obs TIME_PERIOD="2013-08-15" OBS_VALUE="-0.55706" BBK_DIFF_A="-0.02322"/>
      <bbk:Obs TIME_PERIOD="2013-08-14" OBS_VALUE="-0.53384" BBK_DIFF_A="-0.03681"/>
      <bbk:Obs TIME_PERIOD="2013-08-13" OBS_VALUE="-0.49703" BBK_DIFF_A="-0.06995"/>
      <bbk:Obs TIME_PERIOD="2013-08-12" OBS_VALUE="-0.42708" BBK_DIFF_A="-0.03839"/>
      <bbk:Obs TIME_PERIOD="2013-08-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-08-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-08-09" OBS_VALUE="-0.38869" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2013-08-08" OBS_VALUE="-0.38869" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2013-08-07" OBS_VALUE="-0.38869" BBK_DIFF_A="0.03795"/>
      <bbk:Obs TIME_PERIOD="2013-08-06" OBS_VALUE="-0.42664" BBK_DIFF_A="-0.05308"/>
      <bbk:Obs TIME_PERIOD="2013-08-05" OBS_VALUE="-0.37356" BBK_DIFF_A="0.05075"/>
      <bbk:Obs TIME_PERIOD="2013-08-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-08-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-08-02" OBS_VALUE="-0.42431" BBK_DIFF_A="-0.09752"/>
      <bbk:Obs TIME_PERIOD="2013-08-01" OBS_VALUE="-0.32679" BBK_DIFF_A="0.09289"/>
      <bbk:Obs TIME_PERIOD="2013-07-31" OBS_VALUE="-0.41968" BBK_DIFF_A="-0.0059"/>
      <bbk:Obs TIME_PERIOD="2013-07-30" OBS_VALUE="-0.41378" BBK_DIFF_A="0.0098"/>
      <bbk:Obs TIME_PERIOD="2013-07-29" OBS_VALUE="-0.42358" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2013-07-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-07-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-07-26" OBS_VALUE="-0.42358" BBK_DIFF_A="-0.06227"/>
      <bbk:Obs TIME_PERIOD="2013-07-25" OBS_VALUE="-0.36131" BBK_DIFF_A="-0.05707"/>
      <bbk:Obs TIME_PERIOD="2013-07-24" OBS_VALUE="-0.30424" BBK_DIFF_A="-0.0349"/>
      <bbk:Obs TIME_PERIOD="2013-07-23" OBS_VALUE="-0.26934" BBK_DIFF_A="-0.00491"/>
      <bbk:Obs TIME_PERIOD="2013-07-22" OBS_VALUE="-0.26443" BBK_DIFF_A="0.00451"/>
      <bbk:Obs TIME_PERIOD="2013-07-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-07-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-07-19" OBS_VALUE="-0.26894" BBK_DIFF_A="-0.01019"/>
      <bbk:Obs TIME_PERIOD="2013-07-18" OBS_VALUE="-0.25875" BBK_DIFF_A="0.04114"/>
      <bbk:Obs TIME_PERIOD="2013-07-17" OBS_VALUE="-0.29989" BBK_DIFF_A="-0.00682"/>
      <bbk:Obs TIME_PERIOD="2013-07-16" OBS_VALUE="-0.29307" BBK_DIFF_A="0.00421"/>
      <bbk:Obs TIME_PERIOD="2013-07-15" OBS_VALUE="-0.29728" BBK_DIFF_A="0.01041"/>
      <bbk:Obs TIME_PERIOD="2013-07-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-07-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-07-12" OBS_VALUE="-0.30769" BBK_DIFF_A="0.03354"/>
      <bbk:Obs TIME_PERIOD="2013-07-11" OBS_VALUE="-0.34123" BBK_DIFF_A="0.00712"/>
      <bbk:Obs TIME_PERIOD="2013-07-10" OBS_VALUE="-0.34835" BBK_DIFF_A="0.07466"/>
      <bbk:Obs TIME_PERIOD="2013-07-09" OBS_VALUE="-0.42301" BBK_DIFF_A="0.0269"/>
      <bbk:Obs TIME_PERIOD="2013-07-08" OBS_VALUE="-0.44991" BBK_DIFF_A="-0.04763"/>
      <bbk:Obs TIME_PERIOD="2013-07-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-07-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-07-05" OBS_VALUE="-0.40228" BBK_DIFF_A="-0.03633"/>
      <bbk:Obs TIME_PERIOD="2013-07-04" OBS_VALUE="-0.36595" BBK_DIFF_A="0.02897"/>
      <bbk:Obs TIME_PERIOD="2013-07-03" OBS_VALUE="-0.39492" BBK_DIFF_A="0.06674"/>
      <bbk:Obs TIME_PERIOD="2013-07-02" OBS_VALUE="-0.46166" BBK_DIFF_A="0.31528"/>
      <bbk:Obs TIME_PERIOD="2013-07-01" OBS_VALUE="-0.77694" BBK_DIFF_A="-0.04245"/>
      <bbk:Obs TIME_PERIOD="2013-06-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-06-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-06-28" OBS_VALUE="-0.73449" BBK_DIFF_A="0.11029"/>
      <bbk:Obs TIME_PERIOD="2013-06-27" OBS_VALUE="-0.84478" BBK_DIFF_A="-0.01921"/>
      <bbk:Obs TIME_PERIOD="2013-06-26" OBS_VALUE="-0.82557" BBK_DIFF_A="0.00391"/>
      <bbk:Obs TIME_PERIOD="2013-06-25" OBS_VALUE="-0.82948" BBK_DIFF_A="-0.25634"/>
      <bbk:Obs TIME_PERIOD="2013-06-24" OBS_VALUE="-0.57314" BBK_DIFF_A="-0.13407"/>
      <bbk:Obs TIME_PERIOD="2013-06-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-06-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-06-21" OBS_VALUE="-0.43907" BBK_DIFF_A="-0.02376"/>
      <bbk:Obs TIME_PERIOD="2013-06-20" OBS_VALUE="-0.41531" BBK_DIFF_A="-0.08362"/>
      <bbk:Obs TIME_PERIOD="2013-06-19" OBS_VALUE="-0.33169" BBK_DIFF_A="-0.00591"/>
      <bbk:Obs TIME_PERIOD="2013-06-18" OBS_VALUE="-0.32578" BBK_DIFF_A="-0.01892"/>
      <bbk:Obs TIME_PERIOD="2013-06-17" OBS_VALUE="-0.30686" BBK_DIFF_A="-0.02172"/>
      <bbk:Obs TIME_PERIOD="2013-06-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-06-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-06-14" OBS_VALUE="-0.28514" BBK_DIFF_A="0.03371"/>
      <bbk:Obs TIME_PERIOD="2013-06-13" OBS_VALUE="-0.31885" BBK_DIFF_A="0.02059"/>
      <bbk:Obs TIME_PERIOD="2013-06-12" OBS_VALUE="-0.33944" BBK_DIFF_A="0.0404"/>
      <bbk:Obs TIME_PERIOD="2013-06-11" OBS_VALUE="-0.37984" BBK_DIFF_A="-0.10037"/>
      <bbk:Obs TIME_PERIOD="2013-06-10" OBS_VALUE="-0.27947" BBK_DIFF_A="-0.02666"/>
      <bbk:Obs TIME_PERIOD="2013-06-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-06-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-06-07" OBS_VALUE="-0.25281" BBK_DIFF_A="0.02657"/>
      <bbk:Obs TIME_PERIOD="2013-06-06" OBS_VALUE="-0.27938" BBK_DIFF_A="0.04675"/>
      <bbk:Obs TIME_PERIOD="2013-06-05" OBS_VALUE="-0.32613" BBK_DIFF_A="0.01425"/>
      <bbk:Obs TIME_PERIOD="2013-06-04" OBS_VALUE="-0.34038" BBK_DIFF_A="-0.01913"/>
      <bbk:Obs TIME_PERIOD="2013-06-03" OBS_VALUE="-0.32125" BBK_DIFF_A="-0.05522"/>
      <bbk:Obs TIME_PERIOD="2013-06-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-06-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-05-31" OBS_VALUE="-0.26603" BBK_DIFF_A="0.0121"/>
      <bbk:Obs TIME_PERIOD="2013-05-30" OBS_VALUE="-0.27813" BBK_DIFF_A="0.03223"/>
      <bbk:Obs TIME_PERIOD="2013-05-29" OBS_VALUE="-0.31036" BBK_DIFF_A="8.9E-4"/>
      <bbk:Obs TIME_PERIOD="2013-05-28" OBS_VALUE="-0.31125" BBK_DIFF_A="-0.07682"/>
      <bbk:Obs TIME_PERIOD="2013-05-27" OBS_VALUE="-0.23443" BBK_DIFF_A="0.02784"/>
      <bbk:Obs TIME_PERIOD="2013-05-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-05-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-05-24" OBS_VALUE="-0.26227" BBK_DIFF_A="-0.04771"/>
      <bbk:Obs TIME_PERIOD="2013-05-23" OBS_VALUE="-0.21456" BBK_DIFF_A="0.00258"/>
      <bbk:Obs TIME_PERIOD="2013-05-22" OBS_VALUE="-0.21714" BBK_DIFF_A="-0.00458"/>
      <bbk:Obs TIME_PERIOD="2013-05-21" OBS_VALUE="-0.21256" BBK_DIFF_A="-0.02642"/>
      <bbk:Obs TIME_PERIOD="2013-05-20" OBS_VALUE="-0.18614" BBK_DIFF_A="-0.06671"/>
      <bbk:Obs TIME_PERIOD="2013-05-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-05-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-05-17" OBS_VALUE="-0.11943" BBK_DIFF_A="0.08558"/>
      <bbk:Obs TIME_PERIOD="2013-05-16" OBS_VALUE="-0.20501" BBK_DIFF_A="-0.03597"/>
      <bbk:Obs TIME_PERIOD="2013-05-15" OBS_VALUE="-0.16904" BBK_DIFF_A="0.0114"/>
      <bbk:Obs TIME_PERIOD="2013-05-14" OBS_VALUE="-0.18044" BBK_DIFF_A="-0.00682"/>
      <bbk:Obs TIME_PERIOD="2013-05-13" OBS_VALUE="-0.17362" BBK_DIFF_A="-0.02796"/>
      <bbk:Obs TIME_PERIOD="2013-05-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-05-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-05-10" OBS_VALUE="-0.14566" BBK_DIFF_A="-0.07826"/>
      <bbk:Obs TIME_PERIOD="2013-05-09" OBS_VALUE="-0.0674" BBK_DIFF_A="0.03598"/>
      <bbk:Obs TIME_PERIOD="2013-05-08" OBS_VALUE="-0.10338" BBK_DIFF_A="-0.01979"/>
      <bbk:Obs TIME_PERIOD="2013-05-07" OBS_VALUE="-0.08359" BBK_DIFF_A="-0.02081"/>
      <bbk:Obs TIME_PERIOD="2013-05-06" OBS_VALUE="-0.06278" BBK_DIFF_A="-0.06704"/>
      <bbk:Obs TIME_PERIOD="2013-05-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-05-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-05-03" OBS_VALUE="0.00426" BBK_DIFF_A="-0.00985"/>
      <bbk:Obs TIME_PERIOD="2013-05-02" OBS_VALUE="0.01411" BBK_DIFF_A="0.00889"/>
      <bbk:Obs TIME_PERIOD="2013-05-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-04-30" OBS_VALUE="0.00522" BBK_DIFF_A="6.2E-4"/>
      <bbk:Obs TIME_PERIOD="2013-04-29" OBS_VALUE="0.0046" BBK_DIFF_A="0.0046"/>
      <bbk:Obs TIME_PERIOD="2013-04-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-04-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-04-26" OBS_VALUE="0.0" BBK_DIFF_A="2.0E-5"/>
      <bbk:Obs TIME_PERIOD="2013-04-25" OBS_VALUE="-2.0E-5" BBK_DIFF_A="3.5E-4"/>
      <bbk:Obs TIME_PERIOD="2013-04-24" OBS_VALUE="-3.7E-4" BBK_DIFF_A="3.0E-4"/>
      <bbk:Obs TIME_PERIOD="2013-04-23" OBS_VALUE="-6.7E-4" BBK_DIFF_A="0.07221"/>
      <bbk:Obs TIME_PERIOD="2013-04-22" OBS_VALUE="-0.07288" BBK_DIFF_A="-0.01869"/>
      <bbk:Obs TIME_PERIOD="2013-04-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-04-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-04-19" OBS_VALUE="-0.05419" BBK_DIFF_A="0.02082"/>
      <bbk:Obs TIME_PERIOD="2013-04-18" OBS_VALUE="-0.07501" BBK_DIFF_A="0.00338"/>
      <bbk:Obs TIME_PERIOD="2013-04-17" OBS_VALUE="-0.07839" BBK_DIFF_A="-0.03802"/>
      <bbk:Obs TIME_PERIOD="2013-04-16" OBS_VALUE="-0.04037" BBK_DIFF_A="0.04092"/>
      <bbk:Obs TIME_PERIOD="2013-04-15" OBS_VALUE="-0.08129" BBK_DIFF_A="-0.03846"/>
      <bbk:Obs TIME_PERIOD="2013-04-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-04-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-04-12" OBS_VALUE="-0.04283" BBK_DIFF_A="0.05398"/>
      <bbk:Obs TIME_PERIOD="2013-04-11" OBS_VALUE="-0.09681" BBK_DIFF_A="-0.05684"/>
      <bbk:Obs TIME_PERIOD="2013-04-10" OBS_VALUE="-0.03997" BBK_DIFF_A="-0.0196"/>
      <bbk:Obs TIME_PERIOD="2013-04-09" OBS_VALUE="-0.02037" BBK_DIFF_A="-0.01924"/>
      <bbk:Obs TIME_PERIOD="2013-04-08" OBS_VALUE="-0.00113" BBK_DIFF_A="0.02273"/>
      <bbk:Obs TIME_PERIOD="2013-04-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-04-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-04-05" OBS_VALUE="-0.02386" BBK_DIFF_A="0.08455"/>
      <bbk:Obs TIME_PERIOD="2013-04-04" OBS_VALUE="-0.10841" BBK_DIFF_A="-0.00275"/>
      <bbk:Obs TIME_PERIOD="2013-04-03" OBS_VALUE="-0.10566" BBK_DIFF_A="-0.03008"/>
      <bbk:Obs TIME_PERIOD="2013-04-02" OBS_VALUE="-0.07558" BBK_DIFF_A="-0.02994"/>
      <bbk:Obs TIME_PERIOD="2013-04-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-03-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-03-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-03-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-03-28" OBS_VALUE="-0.04564" BBK_DIFF_A="0.02196"/>
      <bbk:Obs TIME_PERIOD="2013-03-27" OBS_VALUE="-0.0676" BBK_DIFF_A="0.05183"/>
      <bbk:Obs TIME_PERIOD="2013-03-26" OBS_VALUE="-0.11943" BBK_DIFF_A="0.02539"/>
      <bbk:Obs TIME_PERIOD="2013-03-25" OBS_VALUE="-0.14482" BBK_DIFF_A="-0.07914"/>
      <bbk:Obs TIME_PERIOD="2013-03-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-03-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-03-22" OBS_VALUE="-0.06568" BBK_DIFF_A="0.06495"/>
      <bbk:Obs TIME_PERIOD="2013-03-21" OBS_VALUE="-0.13063" BBK_DIFF_A="-0.03561"/>
      <bbk:Obs TIME_PERIOD="2013-03-20" OBS_VALUE="-0.09502" BBK_DIFF_A="0.02204"/>
      <bbk:Obs TIME_PERIOD="2013-03-19" OBS_VALUE="-0.11706" BBK_DIFF_A="0.03835"/>
      <bbk:Obs TIME_PERIOD="2013-03-18" OBS_VALUE="-0.15541" BBK_DIFF_A="0.08848"/>
      <bbk:Obs TIME_PERIOD="2013-03-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-03-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-03-15" OBS_VALUE="-0.24389" BBK_DIFF_A="0.00152"/>
      <bbk:Obs TIME_PERIOD="2013-03-14" OBS_VALUE="-0.24541" BBK_DIFF_A="0.00681"/>
      <bbk:Obs TIME_PERIOD="2013-03-13" OBS_VALUE="-0.25222" BBK_DIFF_A="-5.2E-4"/>
      <bbk:Obs TIME_PERIOD="2013-03-12" OBS_VALUE="-0.2517" BBK_DIFF_A="-0.01592"/>
      <bbk:Obs TIME_PERIOD="2013-03-11" OBS_VALUE="-0.23578" BBK_DIFF_A="0.00597"/>
      <bbk:Obs TIME_PERIOD="2013-03-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-03-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-03-08" OBS_VALUE="-0.24175" BBK_DIFF_A="-0.0199"/>
      <bbk:Obs TIME_PERIOD="2013-03-07" OBS_VALUE="-0.22185" BBK_DIFF_A="1.3E-4"/>
      <bbk:Obs TIME_PERIOD="2013-03-06" OBS_VALUE="-0.22198" BBK_DIFF_A="-0.00443"/>
      <bbk:Obs TIME_PERIOD="2013-03-05" OBS_VALUE="-0.21755" BBK_DIFF_A="-0.038"/>
      <bbk:Obs TIME_PERIOD="2013-03-04" OBS_VALUE="-0.17955" BBK_DIFF_A="0.01398"/>
      <bbk:Obs TIME_PERIOD="2013-03-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-03-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-03-01" OBS_VALUE="-0.19353" BBK_DIFF_A="0.0154"/>
      <bbk:Obs TIME_PERIOD="2013-02-28" OBS_VALUE="-0.20893" BBK_DIFF_A="-0.00597"/>
      <bbk:Obs TIME_PERIOD="2013-02-27" OBS_VALUE="-0.20296" BBK_DIFF_A="0.13243"/>
      <bbk:Obs TIME_PERIOD="2013-02-26" OBS_VALUE="-0.33539" BBK_DIFF_A="0.3434"/>
      <bbk:Obs TIME_PERIOD="2013-02-25" OBS_VALUE="-0.67879" BBK_DIFF_A="-0.33832"/>
      <bbk:Obs TIME_PERIOD="2013-02-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-02-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-02-22" OBS_VALUE="-0.34047" BBK_DIFF_A="0.02688"/>
      <bbk:Obs TIME_PERIOD="2013-02-21" OBS_VALUE="-0.36735" BBK_DIFF_A="0.51358"/>
      <bbk:Obs TIME_PERIOD="2013-02-20" OBS_VALUE="-0.88093" BBK_DIFF_A="-0.11457"/>
      <bbk:Obs TIME_PERIOD="2013-02-19" OBS_VALUE="-0.76636" BBK_DIFF_A="0.06342"/>
      <bbk:Obs TIME_PERIOD="2013-02-18" OBS_VALUE="-0.82978" BBK_DIFF_A="-0.02429"/>
      <bbk:Obs TIME_PERIOD="2013-02-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-02-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-02-15" OBS_VALUE="-0.80549" BBK_DIFF_A="-0.00538"/>
      <bbk:Obs TIME_PERIOD="2013-02-14" OBS_VALUE="-0.80011" BBK_DIFF_A="0.06418"/>
      <bbk:Obs TIME_PERIOD="2013-02-13" OBS_VALUE="-0.86429" BBK_DIFF_A="-0.54959"/>
      <bbk:Obs TIME_PERIOD="2013-02-12" OBS_VALUE="-0.3147" BBK_DIFF_A="-0.01048"/>
      <bbk:Obs TIME_PERIOD="2013-02-11" OBS_VALUE="-0.30422" BBK_DIFF_A="-0.01046"/>
      <bbk:Obs TIME_PERIOD="2013-02-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-02-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-02-08" OBS_VALUE="-0.29376" BBK_DIFF_A="0.02174"/>
      <bbk:Obs TIME_PERIOD="2013-02-07" OBS_VALUE="-0.3155" BBK_DIFF_A="-0.04048"/>
      <bbk:Obs TIME_PERIOD="2013-02-06" OBS_VALUE="-0.27502" BBK_DIFF_A="0.00193"/>
      <bbk:Obs TIME_PERIOD="2013-02-05" OBS_VALUE="-0.27695" BBK_DIFF_A="0.07102"/>
      <bbk:Obs TIME_PERIOD="2013-02-04" OBS_VALUE="-0.34797" BBK_DIFF_A="-0.0285"/>
      <bbk:Obs TIME_PERIOD="2013-02-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-02-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-02-01" OBS_VALUE="-0.31947" BBK_DIFF_A="-0.04643"/>
      <bbk:Obs TIME_PERIOD="2013-01-31" OBS_VALUE="-0.27304" BBK_DIFF_A="0.10289"/>
      <bbk:Obs TIME_PERIOD="2013-01-30" OBS_VALUE="-0.37593" BBK_DIFF_A="-0.02861"/>
      <bbk:Obs TIME_PERIOD="2013-01-29" OBS_VALUE="-0.34732" BBK_DIFF_A="-0.02031"/>
      <bbk:Obs TIME_PERIOD="2013-01-28" OBS_VALUE="-0.32701" BBK_DIFF_A="0.00492"/>
      <bbk:Obs TIME_PERIOD="2013-01-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-01-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-01-25" OBS_VALUE="-0.33193" BBK_DIFF_A="-0.0812"/>
      <bbk:Obs TIME_PERIOD="2013-01-24" OBS_VALUE="-0.25073" BBK_DIFF_A="0.04814"/>
      <bbk:Obs TIME_PERIOD="2013-01-23" OBS_VALUE="-0.29887" BBK_DIFF_A="0.03792"/>
      <bbk:Obs TIME_PERIOD="2013-01-22" OBS_VALUE="-0.33679" BBK_DIFF_A="-0.02205"/>
      <bbk:Obs TIME_PERIOD="2013-01-21" OBS_VALUE="-0.31474" BBK_DIFF_A="-5.0E-4"/>
      <bbk:Obs TIME_PERIOD="2013-01-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-01-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-01-18" OBS_VALUE="-0.31424" BBK_DIFF_A="0.03774"/>
      <bbk:Obs TIME_PERIOD="2013-01-17" OBS_VALUE="-0.35198" BBK_DIFF_A="0.02945"/>
      <bbk:Obs TIME_PERIOD="2013-01-16" OBS_VALUE="-0.38143" BBK_DIFF_A="0.61224"/>
      <bbk:Obs TIME_PERIOD="2013-01-15" OBS_VALUE="-0.99367" BBK_DIFF_A="0.05069"/>
      <bbk:Obs TIME_PERIOD="2013-01-14" OBS_VALUE="-1.04436" BBK_DIFF_A="0.1882"/>
      <bbk:Obs TIME_PERIOD="2013-01-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-01-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-01-11" OBS_VALUE="-1.23256" BBK_DIFF_A="-0.04305"/>
      <bbk:Obs TIME_PERIOD="2013-01-10" OBS_VALUE="-1.18951" BBK_DIFF_A="0.02618"/>
      <bbk:Obs TIME_PERIOD="2013-01-09" OBS_VALUE="-1.21569" BBK_DIFF_A="0.11359"/>
      <bbk:Obs TIME_PERIOD="2013-01-08" OBS_VALUE="-1.32928" BBK_DIFF_A="-0.03542"/>
      <bbk:Obs TIME_PERIOD="2013-01-07" OBS_VALUE="-1.29386" BBK_DIFF_A="-0.02842"/>
      <bbk:Obs TIME_PERIOD="2013-01-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-01-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-01-04" OBS_VALUE="-1.26544" BBK_DIFF_A="-0.21665"/>
      <bbk:Obs TIME_PERIOD="2013-01-03" OBS_VALUE="-1.04879" BBK_DIFF_A="-0.06804"/>
      <bbk:Obs TIME_PERIOD="2013-01-02" OBS_VALUE="-0.98075" BBK_DIFF_A="-0.37246"/>
      <bbk:Obs TIME_PERIOD="2013-01-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-12-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-12-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-12-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-12-28" OBS_VALUE="-0.60829" BBK_DIFF_A="0.02076"/>
      <bbk:Obs TIME_PERIOD="2012-12-27" OBS_VALUE="-0.62905" BBK_DIFF_A="0.19479"/>
      <bbk:Obs TIME_PERIOD="2012-12-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-12-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-12-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-12-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-12-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-12-21" OBS_VALUE="-0.82384" BBK_DIFF_A="-0.00485"/>
      <bbk:Obs TIME_PERIOD="2012-12-20" OBS_VALUE="-0.81899" BBK_DIFF_A="0.20727"/>
      <bbk:Obs TIME_PERIOD="2012-12-19" OBS_VALUE="-1.02626" BBK_DIFF_A="-0.08891"/>
      <bbk:Obs TIME_PERIOD="2012-12-18" OBS_VALUE="-0.93735" BBK_DIFF_A="0.07175"/>
      <bbk:Obs TIME_PERIOD="2012-12-17" OBS_VALUE="-1.0091" BBK_DIFF_A="-0.17799"/>
      <bbk:Obs TIME_PERIOD="2012-12-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-12-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-12-14" OBS_VALUE="-0.83111" BBK_DIFF_A="0.05802"/>
      <bbk:Obs TIME_PERIOD="2012-12-13" OBS_VALUE="-0.88913" BBK_DIFF_A="-0.25108"/>
      <bbk:Obs TIME_PERIOD="2012-12-12" OBS_VALUE="-0.63805" BBK_DIFF_A="-0.06907"/>
      <bbk:Obs TIME_PERIOD="2012-12-11" OBS_VALUE="-0.56898" BBK_DIFF_A="-0.15141"/>
      <bbk:Obs TIME_PERIOD="2012-12-10" OBS_VALUE="-0.41757" BBK_DIFF_A="0.14537"/>
      <bbk:Obs TIME_PERIOD="2012-12-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-12-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-12-07" OBS_VALUE="-0.56294" BBK_DIFF_A="-0.06151"/>
      <bbk:Obs TIME_PERIOD="2012-12-06" OBS_VALUE="-0.50143" BBK_DIFF_A="0.17572"/>
      <bbk:Obs TIME_PERIOD="2012-12-05" OBS_VALUE="-0.67715" BBK_DIFF_A="0.05465"/>
      <bbk:Obs TIME_PERIOD="2012-12-04" OBS_VALUE="-0.7318" BBK_DIFF_A="0.02426"/>
      <bbk:Obs TIME_PERIOD="2012-12-03" OBS_VALUE="-0.75606" BBK_DIFF_A="-0.02094"/>
      <bbk:Obs TIME_PERIOD="2012-12-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-12-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-11-30" OBS_VALUE="-0.73512" BBK_DIFF_A="0.22166"/>
      <bbk:Obs TIME_PERIOD="2012-11-29" OBS_VALUE="-0.95678" BBK_DIFF_A="-0.46828"/>
      <bbk:Obs TIME_PERIOD="2012-11-28" OBS_VALUE="-0.4885" BBK_DIFF_A="0.4653"/>
      <bbk:Obs TIME_PERIOD="2012-11-27" OBS_VALUE="-0.9538" BBK_DIFF_A="0.12289"/>
      <bbk:Obs TIME_PERIOD="2012-11-26" OBS_VALUE="-1.07669" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2012-11-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-11-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-11-23" OBS_VALUE="-1.07669" BBK_DIFF_A="-0.01991"/>
      <bbk:Obs TIME_PERIOD="2012-11-22" OBS_VALUE="-1.05678" BBK_DIFF_A="-0.1438"/>
      <bbk:Obs TIME_PERIOD="2012-11-21" OBS_VALUE="-0.91298" BBK_DIFF_A="-0.00796"/>
      <bbk:Obs TIME_PERIOD="2012-11-20" OBS_VALUE="-0.90502" BBK_DIFF_A="-0.17425"/>
      <bbk:Obs TIME_PERIOD="2012-11-19" OBS_VALUE="-0.73077" BBK_DIFF_A="0.00929"/>
      <bbk:Obs TIME_PERIOD="2012-11-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-11-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-11-16" OBS_VALUE="-0.74006" BBK_DIFF_A="-0.02284"/>
      <bbk:Obs TIME_PERIOD="2012-11-15" OBS_VALUE="-0.71722" BBK_DIFF_A="0.03402"/>
      <bbk:Obs TIME_PERIOD="2012-11-14" OBS_VALUE="-0.75124" BBK_DIFF_A="-0.06633"/>
      <bbk:Obs TIME_PERIOD="2012-11-13" OBS_VALUE="-0.68491" BBK_DIFF_A="0.05328"/>
      <bbk:Obs TIME_PERIOD="2012-11-12" OBS_VALUE="-0.73819" BBK_DIFF_A="-0.08071"/>
      <bbk:Obs TIME_PERIOD="2012-11-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-11-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-11-09" OBS_VALUE="-0.65748" BBK_DIFF_A="0.19144"/>
      <bbk:Obs TIME_PERIOD="2012-11-08" OBS_VALUE="-0.84892" BBK_DIFF_A="0.17624"/>
      <bbk:Obs TIME_PERIOD="2012-11-07" OBS_VALUE="-1.02516" BBK_DIFF_A="0.05164"/>
      <bbk:Obs TIME_PERIOD="2012-11-06" OBS_VALUE="-1.0768" BBK_DIFF_A="0.05886"/>
      <bbk:Obs TIME_PERIOD="2012-11-05" OBS_VALUE="-1.13566" BBK_DIFF_A="-0.07575"/>
      <bbk:Obs TIME_PERIOD="2012-11-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-11-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-11-02" OBS_VALUE="-1.05991" BBK_DIFF_A="0.1233"/>
      <bbk:Obs TIME_PERIOD="2012-11-01" OBS_VALUE="-1.18321" BBK_DIFF_A="0.00769"/>
      <bbk:Obs TIME_PERIOD="2012-10-31" OBS_VALUE="-1.1909" BBK_DIFF_A="0.03211"/>
      <bbk:Obs TIME_PERIOD="2012-10-30" OBS_VALUE="-1.22301" BBK_DIFF_A="0.00743"/>
      <bbk:Obs TIME_PERIOD="2012-10-29" OBS_VALUE="-1.23044" BBK_DIFF_A="0.03812"/>
      <bbk:Obs TIME_PERIOD="2012-10-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-10-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-10-26" OBS_VALUE="-1.26856" BBK_DIFF_A="0.09269"/>
      <bbk:Obs TIME_PERIOD="2012-10-25" OBS_VALUE="-1.36125" BBK_DIFF_A="-0.09953"/>
      <bbk:Obs TIME_PERIOD="2012-10-24" OBS_VALUE="-1.26172" BBK_DIFF_A="0.09272"/>
      <bbk:Obs TIME_PERIOD="2012-10-23" OBS_VALUE="-1.35444" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2012-10-22" OBS_VALUE="-1.35444" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2012-10-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-10-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-10-19" OBS_VALUE="-1.35444" BBK_DIFF_A="0.14043"/>
      <bbk:Obs TIME_PERIOD="2012-10-18" OBS_VALUE="-1.49487" BBK_DIFF_A="-0.02389"/>
      <bbk:Obs TIME_PERIOD="2012-10-17" OBS_VALUE="-1.47098" BBK_DIFF_A="-0.21932"/>
      <bbk:Obs TIME_PERIOD="2012-10-16" OBS_VALUE="-1.25166" BBK_DIFF_A="-0.08089"/>
      <bbk:Obs TIME_PERIOD="2012-10-15" OBS_VALUE="-1.17077" BBK_DIFF_A="-0.03686"/>
      <bbk:Obs TIME_PERIOD="2012-10-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-10-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-10-12" OBS_VALUE="-1.13391" BBK_DIFF_A="-0.11179"/>
      <bbk:Obs TIME_PERIOD="2012-10-11" OBS_VALUE="-1.02212" BBK_DIFF_A="-0.01222"/>
      <bbk:Obs TIME_PERIOD="2012-10-10" OBS_VALUE="-1.0099" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2012-10-09" OBS_VALUE="-1.0099" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2012-10-08" OBS_VALUE="-1.0099" BBK_DIFF_A="0.00743"/>
      <bbk:Obs TIME_PERIOD="2012-10-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-10-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-10-05" OBS_VALUE="-1.01733" BBK_DIFF_A="0.05704"/>
      <bbk:Obs TIME_PERIOD="2012-10-04" OBS_VALUE="-1.07437" BBK_DIFF_A="-0.10343"/>
      <bbk:Obs TIME_PERIOD="2012-10-03" OBS_VALUE="-0.97094" BBK_DIFF_A="0.09966"/>
      <bbk:Obs TIME_PERIOD="2012-10-02" OBS_VALUE="-1.0706" BBK_DIFF_A="-0.3232"/>
      <bbk:Obs TIME_PERIOD="2012-10-01" OBS_VALUE="-0.7474" BBK_DIFF_A="-0.15493"/>
      <bbk:Obs TIME_PERIOD="2012-09-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-09-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-09-28" OBS_VALUE="-0.59247" BBK_DIFF_A="0.05231"/>
      <bbk:Obs TIME_PERIOD="2012-09-27" OBS_VALUE="-0.64478" BBK_DIFF_A="0.24205"/>
      <bbk:Obs TIME_PERIOD="2012-09-26" OBS_VALUE="-0.88683" BBK_DIFF_A="0.05188"/>
      <bbk:Obs TIME_PERIOD="2012-09-25" OBS_VALUE="-0.93871" BBK_DIFF_A="0.17898"/>
      <bbk:Obs TIME_PERIOD="2012-09-24" OBS_VALUE="-1.11769" BBK_DIFF_A="0.12068"/>
      <bbk:Obs TIME_PERIOD="2012-09-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-09-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-09-21" OBS_VALUE="-1.23837" BBK_DIFF_A="0.10009"/>
      <bbk:Obs TIME_PERIOD="2012-09-20" OBS_VALUE="-1.33846" BBK_DIFF_A="0.46763"/>
      <bbk:Obs TIME_PERIOD="2012-09-19" OBS_VALUE="-1.80609" BBK_DIFF_A="-1.34337"/>
      <bbk:Obs TIME_PERIOD="2012-09-18" OBS_VALUE="-0.46272" BBK_DIFF_A="0.88685"/>
      <bbk:Obs TIME_PERIOD="2012-09-17" OBS_VALUE="-1.34957" BBK_DIFF_A="-0.38684"/>
      <bbk:Obs TIME_PERIOD="2012-09-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-09-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-09-14" OBS_VALUE="-0.96273" BBK_DIFF_A="0.17568"/>
      <bbk:Obs TIME_PERIOD="2012-09-13" OBS_VALUE="-1.13841" BBK_DIFF_A="0.23698"/>
      <bbk:Obs TIME_PERIOD="2012-09-12" OBS_VALUE="-1.37539" BBK_DIFF_A="-0.35641"/>
      <bbk:Obs TIME_PERIOD="2012-09-11" OBS_VALUE="-1.01898" BBK_DIFF_A="-0.05322"/>
      <bbk:Obs TIME_PERIOD="2012-09-10" OBS_VALUE="-0.96576" BBK_DIFF_A="0.11818"/>
      <bbk:Obs TIME_PERIOD="2012-09-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-09-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-09-07" OBS_VALUE="-1.08394" BBK_DIFF_A="-0.05789"/>
      <bbk:Obs TIME_PERIOD="2012-09-06" OBS_VALUE="-1.02605" BBK_DIFF_A="0.07594"/>
      <bbk:Obs TIME_PERIOD="2012-09-05" OBS_VALUE="-1.10199" BBK_DIFF_A="0.00211"/>
      <bbk:Obs TIME_PERIOD="2012-09-04" OBS_VALUE="-1.1041" BBK_DIFF_A="-0.15395"/>
      <bbk:Obs TIME_PERIOD="2012-09-03" OBS_VALUE="-0.95015" BBK_DIFF_A="0.04682"/>
      <bbk:Obs TIME_PERIOD="2012-09-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-09-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-08-31" OBS_VALUE="-0.99697" BBK_DIFF_A="-0.1057"/>
      <bbk:Obs TIME_PERIOD="2012-08-30" OBS_VALUE="-0.89127" BBK_DIFF_A="0.08228"/>
      <bbk:Obs TIME_PERIOD="2012-08-29" OBS_VALUE="-0.97355" BBK_DIFF_A="0.08658"/>
      <bbk:Obs TIME_PERIOD="2012-08-28" OBS_VALUE="-1.06013" BBK_DIFF_A="-0.11064"/>
      <bbk:Obs TIME_PERIOD="2012-08-27" OBS_VALUE="-0.94949" BBK_DIFF_A="0.11908"/>
      <bbk:Obs TIME_PERIOD="2012-08-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-08-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-08-24" OBS_VALUE="-1.06857" BBK_DIFF_A="0.15953"/>
      <bbk:Obs TIME_PERIOD="2012-08-23" OBS_VALUE="-1.2281" BBK_DIFF_A="0.27627"/>
      <bbk:Obs TIME_PERIOD="2012-08-22" OBS_VALUE="-1.50437" BBK_DIFF_A="0.06851"/>
      <bbk:Obs TIME_PERIOD="2012-08-21" OBS_VALUE="-1.57288" BBK_DIFF_A="0.06483"/>
      <bbk:Obs TIME_PERIOD="2012-08-20" OBS_VALUE="-1.63771" BBK_DIFF_A="-0.01989"/>
      <bbk:Obs TIME_PERIOD="2012-08-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-08-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-08-17" OBS_VALUE="-1.61782" BBK_DIFF_A="-0.03479"/>
      <bbk:Obs TIME_PERIOD="2012-08-16" OBS_VALUE="-1.58303" BBK_DIFF_A="-0.07131"/>
      <bbk:Obs TIME_PERIOD="2012-08-15" OBS_VALUE="-1.51172" BBK_DIFF_A="-0.21008"/>
      <bbk:Obs TIME_PERIOD="2012-08-14" OBS_VALUE="-1.30164" BBK_DIFF_A="0.05441"/>
      <bbk:Obs TIME_PERIOD="2012-08-13" OBS_VALUE="-1.35605" BBK_DIFF_A="-0.06537"/>
      <bbk:Obs TIME_PERIOD="2012-08-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-08-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-08-10" OBS_VALUE="-1.29068" BBK_DIFF_A="0.15388"/>
      <bbk:Obs TIME_PERIOD="2012-08-09" OBS_VALUE="-1.44456" BBK_DIFF_A="0.00914"/>
      <bbk:Obs TIME_PERIOD="2012-08-08" OBS_VALUE="-1.4537" BBK_DIFF_A="0.02118"/>
      <bbk:Obs TIME_PERIOD="2012-08-07" OBS_VALUE="-1.47488" BBK_DIFF_A="-0.14567"/>
      <bbk:Obs TIME_PERIOD="2012-08-06" OBS_VALUE="-1.32921" BBK_DIFF_A="-0.17504"/>
      <bbk:Obs TIME_PERIOD="2012-08-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-08-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-08-03" OBS_VALUE="-1.15417" BBK_DIFF_A="0.07874"/>
      <bbk:Obs TIME_PERIOD="2012-08-02" OBS_VALUE="-1.23291" BBK_DIFF_A="-0.02389"/>
      <bbk:Obs TIME_PERIOD="2012-08-01" OBS_VALUE="-1.20902" BBK_DIFF_A="-0.06122"/>
      <bbk:Obs TIME_PERIOD="2012-07-31" OBS_VALUE="-1.1478" BBK_DIFF_A="0.25227"/>
      <bbk:Obs TIME_PERIOD="2012-07-30" OBS_VALUE="-1.40007" BBK_DIFF_A="-0.49204"/>
      <bbk:Obs TIME_PERIOD="2012-07-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-07-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-07-27" OBS_VALUE="-0.90803" BBK_DIFF_A="-0.27529"/>
      <bbk:Obs TIME_PERIOD="2012-07-26" OBS_VALUE="-0.63274" BBK_DIFF_A="0.34952"/>
      <bbk:Obs TIME_PERIOD="2012-07-25" OBS_VALUE="-0.98226" BBK_DIFF_A="-0.26631"/>
      <bbk:Obs TIME_PERIOD="2012-07-24" OBS_VALUE="-0.71595" BBK_DIFF_A="-0.29737"/>
      <bbk:Obs TIME_PERIOD="2012-07-23" OBS_VALUE="-0.41858" BBK_DIFF_A="0.35059"/>
      <bbk:Obs TIME_PERIOD="2012-07-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-07-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-07-20" OBS_VALUE="-0.76917" BBK_DIFF_A="0.05827"/>
      <bbk:Obs TIME_PERIOD="2012-07-19" OBS_VALUE="-0.82744" BBK_DIFF_A="-0.15535"/>
      <bbk:Obs TIME_PERIOD="2012-07-18" OBS_VALUE="-0.67209" BBK_DIFF_A="-0.03227"/>
      <bbk:Obs TIME_PERIOD="2012-07-17" OBS_VALUE="-0.63982" BBK_DIFF_A="0.02794"/>
      <bbk:Obs TIME_PERIOD="2012-07-16" OBS_VALUE="-0.66776" BBK_DIFF_A="-0.16502"/>
      <bbk:Obs TIME_PERIOD="2012-07-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-07-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-07-13" OBS_VALUE="-0.50274" BBK_DIFF_A="-0.04038"/>
      <bbk:Obs TIME_PERIOD="2012-07-12" OBS_VALUE="-0.46236" BBK_DIFF_A="-0.142"/>
      <bbk:Obs TIME_PERIOD="2012-07-11" OBS_VALUE="-0.32036" BBK_DIFF_A="-0.0488"/>
      <bbk:Obs TIME_PERIOD="2012-07-10" OBS_VALUE="-0.27156" BBK_DIFF_A="-0.14057"/>
      <bbk:Obs TIME_PERIOD="2012-07-09" OBS_VALUE="-0.13099" BBK_DIFF_A="0.09806"/>
      <bbk:Obs TIME_PERIOD="2012-07-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-07-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-07-06" OBS_VALUE="-0.22905" BBK_DIFF_A="0.03172"/>
      <bbk:Obs TIME_PERIOD="2012-07-05" OBS_VALUE="-0.26077" BBK_DIFF_A="0.00652"/>
      <bbk:Obs TIME_PERIOD="2012-07-04" OBS_VALUE="-0.26729" BBK_DIFF_A="0.02968"/>
      <bbk:Obs TIME_PERIOD="2012-07-03" OBS_VALUE="-0.29697" BBK_DIFF_A="-0.0302"/>
      <bbk:Obs TIME_PERIOD="2012-07-02" OBS_VALUE="-0.26677" BBK_DIFF_A="0.03789"/>
      <bbk:Obs TIME_PERIOD="2012-07-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-06-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-06-29" OBS_VALUE="-0.30466" BBK_DIFF_A="-0.14593"/>
      <bbk:Obs TIME_PERIOD="2012-06-28" OBS_VALUE="-0.15873" BBK_DIFF_A="0.22945"/>
      <bbk:Obs TIME_PERIOD="2012-06-27" OBS_VALUE="-0.38818" BBK_DIFF_A="0.01969"/>
      <bbk:Obs TIME_PERIOD="2012-06-26" OBS_VALUE="-0.40787" BBK_DIFF_A="0.18207"/>
      <bbk:Obs TIME_PERIOD="2012-06-25" OBS_VALUE="-0.58994" BBK_DIFF_A="0.15404"/>
      <bbk:Obs TIME_PERIOD="2012-06-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-06-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-06-22" OBS_VALUE="-0.74398" BBK_DIFF_A="-0.21751"/>
      <bbk:Obs TIME_PERIOD="2012-06-21" OBS_VALUE="-0.52647" BBK_DIFF_A="-0.13785"/>
      <bbk:Obs TIME_PERIOD="2012-06-20" OBS_VALUE="-0.38862" BBK_DIFF_A="-0.28901"/>
      <bbk:Obs TIME_PERIOD="2012-06-19" OBS_VALUE="-0.09961" BBK_DIFF_A="0.09147"/>
      <bbk:Obs TIME_PERIOD="2012-06-18" OBS_VALUE="-0.19108" BBK_DIFF_A="-0.04583"/>
      <bbk:Obs TIME_PERIOD="2012-06-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-06-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-06-15" OBS_VALUE="-0.14525" BBK_DIFF_A="0.02013"/>
      <bbk:Obs TIME_PERIOD="2012-06-14" OBS_VALUE="-0.16538" BBK_DIFF_A="-0.0607"/>
      <bbk:Obs TIME_PERIOD="2012-06-13" OBS_VALUE="-0.10468" BBK_DIFF_A="-0.19747"/>
      <bbk:Obs TIME_PERIOD="2012-06-12" OBS_VALUE="0.09279" BBK_DIFF_A="-0.01061"/>
      <bbk:Obs TIME_PERIOD="2012-06-11" OBS_VALUE="0.1034" BBK_DIFF_A="-0.0178"/>
      <bbk:Obs TIME_PERIOD="2012-06-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-06-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-06-08" OBS_VALUE="0.1212" BBK_DIFF_A="-0.01227"/>
      <bbk:Obs TIME_PERIOD="2012-06-07" OBS_VALUE="0.13347" BBK_DIFF_A="0.02856"/>
      <bbk:Obs TIME_PERIOD="2012-06-06" OBS_VALUE="0.10491" BBK_DIFF_A="-0.01629"/>
      <bbk:Obs TIME_PERIOD="2012-06-05" OBS_VALUE="0.1212" BBK_DIFF_A="-0.00845"/>
      <bbk:Obs TIME_PERIOD="2012-06-04" OBS_VALUE="0.12965" BBK_DIFF_A="-0.0015"/>
      <bbk:Obs TIME_PERIOD="2012-06-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-06-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-06-01" OBS_VALUE="0.13115" BBK_DIFF_A="0.00885"/>
      <bbk:Obs TIME_PERIOD="2012-05-31" OBS_VALUE="0.1223" BBK_DIFF_A="-0.02393"/>
      <bbk:Obs TIME_PERIOD="2012-05-30" OBS_VALUE="0.14623" BBK_DIFF_A="0.00955"/>
      <bbk:Obs TIME_PERIOD="2012-05-29" OBS_VALUE="0.13668" BBK_DIFF_A="0.01661"/>
      <bbk:Obs TIME_PERIOD="2012-05-28" OBS_VALUE="0.12007" BBK_DIFF_A="-0.00235"/>
      <bbk:Obs TIME_PERIOD="2012-05-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-05-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-05-25" OBS_VALUE="0.12242" BBK_DIFF_A="-0.01034"/>
      <bbk:Obs TIME_PERIOD="2012-05-24" OBS_VALUE="0.13276" BBK_DIFF_A="0.0395"/>
      <bbk:Obs TIME_PERIOD="2012-05-23" OBS_VALUE="0.09326" BBK_DIFF_A="0.09031"/>
      <bbk:Obs TIME_PERIOD="2012-05-22" OBS_VALUE="0.00295" BBK_DIFF_A="-0.02366"/>
      <bbk:Obs TIME_PERIOD="2012-05-21" OBS_VALUE="0.02661" BBK_DIFF_A="-0.0394"/>
      <bbk:Obs TIME_PERIOD="2012-05-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-05-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-05-18" OBS_VALUE="0.06601" BBK_DIFF_A="0.03468"/>
      <bbk:Obs TIME_PERIOD="2012-05-17" OBS_VALUE="0.03133" BBK_DIFF_A="0.00907"/>
      <bbk:Obs TIME_PERIOD="2012-05-16" OBS_VALUE="0.02226" BBK_DIFF_A="0.0032"/>
      <bbk:Obs TIME_PERIOD="2012-05-15" OBS_VALUE="0.01906" BBK_DIFF_A="-0.07597"/>
      <bbk:Obs TIME_PERIOD="2012-05-14" OBS_VALUE="0.09503" BBK_DIFF_A="0.13054"/>
      <bbk:Obs TIME_PERIOD="2012-05-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-05-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-05-11" OBS_VALUE="-0.03551" BBK_DIFF_A="2.2E-4"/>
      <bbk:Obs TIME_PERIOD="2012-05-10" OBS_VALUE="-0.03573" BBK_DIFF_A="0.04292"/>
      <bbk:Obs TIME_PERIOD="2012-05-09" OBS_VALUE="-0.07865" BBK_DIFF_A="0.03943"/>
      <bbk:Obs TIME_PERIOD="2012-05-08" OBS_VALUE="-0.11808" BBK_DIFF_A="0.01607"/>
      <bbk:Obs TIME_PERIOD="2012-05-07" OBS_VALUE="-0.13415" BBK_DIFF_A="0.05948"/>
      <bbk:Obs TIME_PERIOD="2012-05-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-05-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-05-04" OBS_VALUE="-0.19363" BBK_DIFF_A="0.00513"/>
      <bbk:Obs TIME_PERIOD="2012-05-03" OBS_VALUE="-0.19876" BBK_DIFF_A="0.01155"/>
      <bbk:Obs TIME_PERIOD="2012-05-02" OBS_VALUE="-0.21031" BBK_DIFF_A="0.03367"/>
      <bbk:Obs TIME_PERIOD="2012-05-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-04-30" OBS_VALUE="-0.24398" BBK_DIFF_A="1.1E-4"/>
      <bbk:Obs TIME_PERIOD="2012-04-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-04-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-04-27" OBS_VALUE="-0.24409" BBK_DIFF_A="0.03697"/>
      <bbk:Obs TIME_PERIOD="2012-04-26" OBS_VALUE="-0.28106" BBK_DIFF_A="0.02152"/>
      <bbk:Obs TIME_PERIOD="2012-04-25" OBS_VALUE="-0.30258" BBK_DIFF_A="-0.01472"/>
      <bbk:Obs TIME_PERIOD="2012-04-24" OBS_VALUE="-0.28786" BBK_DIFF_A="-0.07173"/>
      <bbk:Obs TIME_PERIOD="2012-04-23" OBS_VALUE="-0.21613" BBK_DIFF_A="0.02607"/>
      <bbk:Obs TIME_PERIOD="2012-04-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-04-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-04-20" OBS_VALUE="-0.2422" BBK_DIFF_A="0.01889"/>
      <bbk:Obs TIME_PERIOD="2012-04-19" OBS_VALUE="-0.26109" BBK_DIFF_A="-0.02653"/>
      <bbk:Obs TIME_PERIOD="2012-04-18" OBS_VALUE="-0.23456" BBK_DIFF_A="0.02788"/>
      <bbk:Obs TIME_PERIOD="2012-04-17" OBS_VALUE="-0.26244" BBK_DIFF_A="-0.05815"/>
      <bbk:Obs TIME_PERIOD="2012-04-16" OBS_VALUE="-0.20429" BBK_DIFF_A="0.0168"/>
      <bbk:Obs TIME_PERIOD="2012-04-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-04-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-04-13" OBS_VALUE="-0.22109" BBK_DIFF_A="0.00981"/>
      <bbk:Obs TIME_PERIOD="2012-04-12" OBS_VALUE="-0.2309" BBK_DIFF_A="-0.01912"/>
      <bbk:Obs TIME_PERIOD="2012-04-11" OBS_VALUE="-0.21178" BBK_DIFF_A="-0.00371"/>
      <bbk:Obs TIME_PERIOD="2012-04-10" OBS_VALUE="-0.20807" BBK_DIFF_A="0.02634"/>
      <bbk:Obs TIME_PERIOD="2012-04-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-04-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-04-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-04-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-04-05" OBS_VALUE="-0.23441" BBK_DIFF_A="0.06412"/>
      <bbk:Obs TIME_PERIOD="2012-04-04" OBS_VALUE="-0.29853" BBK_DIFF_A="0.00947"/>
      <bbk:Obs TIME_PERIOD="2012-04-03" OBS_VALUE="-0.308" BBK_DIFF_A="0.02287"/>
      <bbk:Obs TIME_PERIOD="2012-04-02" OBS_VALUE="-0.33087" BBK_DIFF_A="0.00395"/>
      <bbk:Obs TIME_PERIOD="2012-04-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-03-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-03-30" OBS_VALUE="-0.33482" BBK_DIFF_A="0.0348"/>
      <bbk:Obs TIME_PERIOD="2012-03-29" OBS_VALUE="-0.36962" BBK_DIFF_A="0.00331"/>
      <bbk:Obs TIME_PERIOD="2012-03-28" OBS_VALUE="-0.37293" BBK_DIFF_A="0.06697"/>
      <bbk:Obs TIME_PERIOD="2012-03-27" OBS_VALUE="-0.4399" BBK_DIFF_A="-0.06293"/>
      <bbk:Obs TIME_PERIOD="2012-03-26" OBS_VALUE="-0.37697" BBK_DIFF_A="0.00714"/>
      <bbk:Obs TIME_PERIOD="2012-03-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-03-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-03-23" OBS_VALUE="-0.38411" BBK_DIFF_A="0.04705"/>
      <bbk:Obs TIME_PERIOD="2012-03-22" OBS_VALUE="-0.43116" BBK_DIFF_A="0.13386"/>
      <bbk:Obs TIME_PERIOD="2012-03-21" OBS_VALUE="-0.56502" BBK_DIFF_A="0.00967"/>
      <bbk:Obs TIME_PERIOD="2012-03-20" OBS_VALUE="-0.57469" BBK_DIFF_A="0.0121"/>
      <bbk:Obs TIME_PERIOD="2012-03-19" OBS_VALUE="-0.58679" BBK_DIFF_A="-0.03928"/>
      <bbk:Obs TIME_PERIOD="2012-03-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-03-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-03-16" OBS_VALUE="-0.54751" BBK_DIFF_A="-0.02493"/>
      <bbk:Obs TIME_PERIOD="2012-03-15" OBS_VALUE="-0.52258" BBK_DIFF_A="-0.11573"/>
      <bbk:Obs TIME_PERIOD="2012-03-14" OBS_VALUE="-0.40685" BBK_DIFF_A="-0.12434"/>
      <bbk:Obs TIME_PERIOD="2012-03-13" OBS_VALUE="-0.28251" BBK_DIFF_A="-0.02216"/>
      <bbk:Obs TIME_PERIOD="2012-03-12" OBS_VALUE="-0.26035" BBK_DIFF_A="0.02548"/>
      <bbk:Obs TIME_PERIOD="2012-03-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-03-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-03-09" OBS_VALUE="-0.28583" BBK_DIFF_A="0.00945"/>
      <bbk:Obs TIME_PERIOD="2012-03-08" OBS_VALUE="-0.29528" BBK_DIFF_A="-0.01847"/>
      <bbk:Obs TIME_PERIOD="2012-03-07" OBS_VALUE="-0.27681" BBK_DIFF_A="-0.00174"/>
      <bbk:Obs TIME_PERIOD="2012-03-06" OBS_VALUE="-0.27507" BBK_DIFF_A="0.00203"/>
      <bbk:Obs TIME_PERIOD="2012-03-05" OBS_VALUE="-0.2771" BBK_DIFF_A="0.03425"/>
      <bbk:Obs TIME_PERIOD="2012-03-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-03-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-03-02" OBS_VALUE="-0.31135" BBK_DIFF_A="-0.01002"/>
      <bbk:Obs TIME_PERIOD="2012-03-01" OBS_VALUE="-0.30133" BBK_DIFF_A="-0.02708"/>
      <bbk:Obs TIME_PERIOD="2012-02-29" OBS_VALUE="-0.27425" BBK_DIFF_A="-0.04761"/>
      <bbk:Obs TIME_PERIOD="2012-02-28" OBS_VALUE="-0.22664" BBK_DIFF_A="0.05597"/>
      <bbk:Obs TIME_PERIOD="2012-02-27" OBS_VALUE="-0.28261" BBK_DIFF_A="-0.00178"/>
      <bbk:Obs TIME_PERIOD="2012-02-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-02-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-02-24" OBS_VALUE="-0.28083" BBK_DIFF_A="0.03185"/>
      <bbk:Obs TIME_PERIOD="2012-02-23" OBS_VALUE="-0.31268" BBK_DIFF_A="0.04447"/>
      <bbk:Obs TIME_PERIOD="2012-02-22" OBS_VALUE="-0.35715" BBK_DIFF_A="0.02762"/>
      <bbk:Obs TIME_PERIOD="2012-02-21" OBS_VALUE="-0.38477" BBK_DIFF_A="-0.02137"/>
      <bbk:Obs TIME_PERIOD="2012-02-20" OBS_VALUE="-0.3634" BBK_DIFF_A="-0.04656"/>
      <bbk:Obs TIME_PERIOD="2012-02-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-02-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-02-17" OBS_VALUE="-0.31684" BBK_DIFF_A="-0.10451"/>
      <bbk:Obs TIME_PERIOD="2012-02-16" OBS_VALUE="-0.21233" BBK_DIFF_A="0.10929"/>
      <bbk:Obs TIME_PERIOD="2012-02-15" OBS_VALUE="-0.32162" BBK_DIFF_A="0.06333"/>
      <bbk:Obs TIME_PERIOD="2012-02-14" OBS_VALUE="-0.38495" BBK_DIFF_A="0.05183"/>
      <bbk:Obs TIME_PERIOD="2012-02-13" OBS_VALUE="-0.43678" BBK_DIFF_A="0.02782"/>
      <bbk:Obs TIME_PERIOD="2012-02-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-02-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-02-10" OBS_VALUE="-0.4646" BBK_DIFF_A="0.00334"/>
      <bbk:Obs TIME_PERIOD="2012-02-09" OBS_VALUE="-0.46794" BBK_DIFF_A="-0.03164"/>
      <bbk:Obs TIME_PERIOD="2012-02-08" OBS_VALUE="-0.4363" BBK_DIFF_A="-0.08664"/>
      <bbk:Obs TIME_PERIOD="2012-02-07" OBS_VALUE="-0.34966" BBK_DIFF_A="0.03336"/>
      <bbk:Obs TIME_PERIOD="2012-02-06" OBS_VALUE="-0.38302" BBK_DIFF_A="-0.05379"/>
      <bbk:Obs TIME_PERIOD="2012-02-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-02-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-02-03" OBS_VALUE="-0.32923" BBK_DIFF_A="-0.04139"/>
      <bbk:Obs TIME_PERIOD="2012-02-02" OBS_VALUE="-0.28784" BBK_DIFF_A="0.03936"/>
      <bbk:Obs TIME_PERIOD="2012-02-01" OBS_VALUE="-0.3272" BBK_DIFF_A="0.05985"/>
      <bbk:Obs TIME_PERIOD="2012-01-31" OBS_VALUE="-0.38705" BBK_DIFF_A="-0.01253"/>
      <bbk:Obs TIME_PERIOD="2012-01-30" OBS_VALUE="-0.37452" BBK_DIFF_A="0.03726"/>
      <bbk:Obs TIME_PERIOD="2012-01-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-01-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-01-27" OBS_VALUE="-0.41178" BBK_DIFF_A="0.03309"/>
      <bbk:Obs TIME_PERIOD="2012-01-26" OBS_VALUE="-0.44487" BBK_DIFF_A="0.00182"/>
      <bbk:Obs TIME_PERIOD="2012-01-25" OBS_VALUE="-0.44669" BBK_DIFF_A="0.05741"/>
      <bbk:Obs TIME_PERIOD="2012-01-24" OBS_VALUE="-0.5041" BBK_DIFF_A="-0.0532"/>
      <bbk:Obs TIME_PERIOD="2012-01-23" OBS_VALUE="-0.4509" BBK_DIFF_A="-0.04669"/>
      <bbk:Obs TIME_PERIOD="2012-01-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-01-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-01-20" OBS_VALUE="-0.40421" BBK_DIFF_A="-0.08365"/>
      <bbk:Obs TIME_PERIOD="2012-01-19" OBS_VALUE="-0.32056" BBK_DIFF_A="-0.00318"/>
      <bbk:Obs TIME_PERIOD="2012-01-18" OBS_VALUE="-0.31738" BBK_DIFF_A="-0.04182"/>
      <bbk:Obs TIME_PERIOD="2012-01-17" OBS_VALUE="-0.27556" BBK_DIFF_A="-0.04199"/>
      <bbk:Obs TIME_PERIOD="2012-01-16" OBS_VALUE="-0.23357" BBK_DIFF_A="0.04635"/>
      <bbk:Obs TIME_PERIOD="2012-01-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-01-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-01-13" OBS_VALUE="-0.27992" BBK_DIFF_A="0.15931"/>
      <bbk:Obs TIME_PERIOD="2012-01-12" OBS_VALUE="-0.43923" BBK_DIFF_A="0.0533"/>
      <bbk:Obs TIME_PERIOD="2012-01-11" OBS_VALUE="-0.49253" BBK_DIFF_A="0.03183"/>
      <bbk:Obs TIME_PERIOD="2012-01-10" OBS_VALUE="-0.52436" BBK_DIFF_A="0.05501"/>
      <bbk:Obs TIME_PERIOD="2012-01-09" OBS_VALUE="-0.57937" BBK_DIFF_A="-0.0317"/>
      <bbk:Obs TIME_PERIOD="2012-01-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-01-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-01-06" OBS_VALUE="-0.54767" BBK_DIFF_A="0.03537"/>
      <bbk:Obs TIME_PERIOD="2012-01-05" OBS_VALUE="-0.58304" BBK_DIFF_A="0.02873"/>
      <bbk:Obs TIME_PERIOD="2012-01-04" OBS_VALUE="-0.61177" BBK_DIFF_A="-0.03591"/>
      <bbk:Obs TIME_PERIOD="2012-01-03" OBS_VALUE="-0.57586" BBK_DIFF_A="-0.09336"/>
      <bbk:Obs TIME_PERIOD="2012-01-02" OBS_VALUE="-0.4825" BBK_DIFF_A="-0.03278"/>
      <bbk:Obs TIME_PERIOD="2012-01-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-12-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-12-30" OBS_VALUE="-0.44972" BBK_DIFF_A="0.03833"/>
      <bbk:Obs TIME_PERIOD="2011-12-29" OBS_VALUE="-0.48805" BBK_DIFF_A="0.02567"/>
      <bbk:Obs TIME_PERIOD="2011-12-28" OBS_VALUE="-0.51372" BBK_DIFF_A="0.03609"/>
      <bbk:Obs TIME_PERIOD="2011-12-27" OBS_VALUE="-0.54981" BBK_DIFF_A="-0.02967"/>
      <bbk:Obs TIME_PERIOD="2011-12-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-12-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-12-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-12-23" OBS_VALUE="-0.52014" BBK_DIFF_A="0.01286"/>
      <bbk:Obs TIME_PERIOD="2011-12-22" OBS_VALUE="-0.533" BBK_DIFF_A="0.05035"/>
      <bbk:Obs TIME_PERIOD="2011-12-21" OBS_VALUE="-0.58335" BBK_DIFF_A="-0.14317"/>
      <bbk:Obs TIME_PERIOD="2011-12-20" OBS_VALUE="-0.44018" BBK_DIFF_A="-0.03116"/>
      <bbk:Obs TIME_PERIOD="2011-12-19" OBS_VALUE="-0.40902" BBK_DIFF_A="0.03096"/>
      <bbk:Obs TIME_PERIOD="2011-12-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-12-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-12-16" OBS_VALUE="-0.43998" BBK_DIFF_A="-0.05705"/>
      <bbk:Obs TIME_PERIOD="2011-12-15" OBS_VALUE="-0.38293" BBK_DIFF_A="0.0746"/>
      <bbk:Obs TIME_PERIOD="2011-12-14" OBS_VALUE="-0.45753" BBK_DIFF_A="0.07394"/>
      <bbk:Obs TIME_PERIOD="2011-12-13" OBS_VALUE="-0.53147" BBK_DIFF_A="0.04756"/>
      <bbk:Obs TIME_PERIOD="2011-12-12" OBS_VALUE="-0.57903" BBK_DIFF_A="0.05884"/>
      <bbk:Obs TIME_PERIOD="2011-12-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-12-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-12-09" OBS_VALUE="-0.63787" BBK_DIFF_A="0.05177"/>
      <bbk:Obs TIME_PERIOD="2011-12-08" OBS_VALUE="-0.68964" BBK_DIFF_A="0.03396"/>
      <bbk:Obs TIME_PERIOD="2011-12-07" OBS_VALUE="-0.7236" BBK_DIFF_A="0.06504"/>
      <bbk:Obs TIME_PERIOD="2011-12-06" OBS_VALUE="-0.78864" BBK_DIFF_A="-0.00307"/>
      <bbk:Obs TIME_PERIOD="2011-12-05" OBS_VALUE="-0.78557" BBK_DIFF_A="0.06901"/>
      <bbk:Obs TIME_PERIOD="2011-12-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-12-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-12-02" OBS_VALUE="-0.85458" BBK_DIFF_A="0.20227"/>
      <bbk:Obs TIME_PERIOD="2011-12-01" OBS_VALUE="-1.05685" BBK_DIFF_A="0.04301"/>
      <bbk:Obs TIME_PERIOD="2011-11-30" OBS_VALUE="-1.09986" BBK_DIFF_A="-0.09726"/>
      <bbk:Obs TIME_PERIOD="2011-11-29" OBS_VALUE="-1.0026" BBK_DIFF_A="-0.11461"/>
      <bbk:Obs TIME_PERIOD="2011-11-28" OBS_VALUE="-0.88799" BBK_DIFF_A="-0.09404"/>
      <bbk:Obs TIME_PERIOD="2011-11-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-11-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-11-25" OBS_VALUE="-0.79395" BBK_DIFF_A="-0.03647"/>
      <bbk:Obs TIME_PERIOD="2011-11-24" OBS_VALUE="-0.75748" BBK_DIFF_A="-0.23386"/>
      <bbk:Obs TIME_PERIOD="2011-11-23" OBS_VALUE="-0.52362" BBK_DIFF_A="-0.02077"/>
      <bbk:Obs TIME_PERIOD="2011-11-22" OBS_VALUE="-0.50285" BBK_DIFF_A="-0.08011"/>
      <bbk:Obs TIME_PERIOD="2011-11-21" OBS_VALUE="-0.42274" BBK_DIFF_A="0.00597"/>
      <bbk:Obs TIME_PERIOD="2011-11-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-11-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-11-18" OBS_VALUE="-0.42871" BBK_DIFF_A="-0.06069"/>
      <bbk:Obs TIME_PERIOD="2011-11-17" OBS_VALUE="-0.36802" BBK_DIFF_A="-0.00287"/>
      <bbk:Obs TIME_PERIOD="2011-11-16" OBS_VALUE="-0.36515" BBK_DIFF_A="-0.02069"/>
      <bbk:Obs TIME_PERIOD="2011-11-15" OBS_VALUE="-0.34446" BBK_DIFF_A="0.08895"/>
      <bbk:Obs TIME_PERIOD="2011-11-14" OBS_VALUE="-0.43341" BBK_DIFF_A="-0.03314"/>
      <bbk:Obs TIME_PERIOD="2011-11-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-11-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-11-11" OBS_VALUE="-0.40027" BBK_DIFF_A="-0.03473"/>
      <bbk:Obs TIME_PERIOD="2011-11-10" OBS_VALUE="-0.36554" BBK_DIFF_A="-0.05537"/>
      <bbk:Obs TIME_PERIOD="2011-11-09" OBS_VALUE="-0.31017" BBK_DIFF_A="0.11632"/>
      <bbk:Obs TIME_PERIOD="2011-11-08" OBS_VALUE="-0.42649" BBK_DIFF_A="-0.03011"/>
      <bbk:Obs TIME_PERIOD="2011-11-07" OBS_VALUE="-0.39638" BBK_DIFF_A="0.15556"/>
      <bbk:Obs TIME_PERIOD="2011-11-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-11-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-11-04" OBS_VALUE="-0.55194" BBK_DIFF_A="-0.0992"/>
      <bbk:Obs TIME_PERIOD="2011-11-03" OBS_VALUE="-0.45274" BBK_DIFF_A="-0.03797"/>
      <bbk:Obs TIME_PERIOD="2011-11-02" OBS_VALUE="-0.41477" BBK_DIFF_A="-0.03688"/>
      <bbk:Obs TIME_PERIOD="2011-11-01" OBS_VALUE="-0.37789" BBK_DIFF_A="0.17884"/>
      <bbk:Obs TIME_PERIOD="2011-10-31" OBS_VALUE="-0.55673" BBK_DIFF_A="0.08131"/>
      <bbk:Obs TIME_PERIOD="2011-10-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-10-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-10-28" OBS_VALUE="-0.63804" BBK_DIFF_A="-0.08762"/>
      <bbk:Obs TIME_PERIOD="2011-10-27" OBS_VALUE="-0.55042" BBK_DIFF_A="-0.00273"/>
      <bbk:Obs TIME_PERIOD="2011-10-26" OBS_VALUE="-0.54769" BBK_DIFF_A="0.01475"/>
      <bbk:Obs TIME_PERIOD="2011-10-25" OBS_VALUE="-0.56244" BBK_DIFF_A="-0.08277"/>
      <bbk:Obs TIME_PERIOD="2011-10-24" OBS_VALUE="-0.47967" BBK_DIFF_A="0.00204"/>
      <bbk:Obs TIME_PERIOD="2011-10-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-10-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-10-21" OBS_VALUE="-0.48171" BBK_DIFF_A="0.05837"/>
      <bbk:Obs TIME_PERIOD="2011-10-20" OBS_VALUE="-0.54008" BBK_DIFF_A="-0.00481"/>
      <bbk:Obs TIME_PERIOD="2011-10-19" OBS_VALUE="-0.53527" BBK_DIFF_A="-0.01819"/>
      <bbk:Obs TIME_PERIOD="2011-10-18" OBS_VALUE="-0.51708" BBK_DIFF_A="0.12133"/>
      <bbk:Obs TIME_PERIOD="2011-10-17" OBS_VALUE="-0.63841" BBK_DIFF_A="-0.03009"/>
      <bbk:Obs TIME_PERIOD="2011-10-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-10-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-10-14" OBS_VALUE="-0.60832" BBK_DIFF_A="-0.01797"/>
      <bbk:Obs TIME_PERIOD="2011-10-13" OBS_VALUE="-0.59035" BBK_DIFF_A="-0.00875"/>
      <bbk:Obs TIME_PERIOD="2011-10-12" OBS_VALUE="-0.5816" BBK_DIFF_A="-0.08854"/>
      <bbk:Obs TIME_PERIOD="2011-10-11" OBS_VALUE="-0.49306" BBK_DIFF_A="0.00674"/>
      <bbk:Obs TIME_PERIOD="2011-10-10" OBS_VALUE="-0.4998" BBK_DIFF_A="-0.09332"/>
      <bbk:Obs TIME_PERIOD="2011-10-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-10-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-10-07" OBS_VALUE="-0.40648" BBK_DIFF_A="0.07069"/>
      <bbk:Obs TIME_PERIOD="2011-10-06" OBS_VALUE="-0.47717" BBK_DIFF_A="-0.18936"/>
      <bbk:Obs TIME_PERIOD="2011-10-05" OBS_VALUE="-0.28781" BBK_DIFF_A="-0.0015"/>
      <bbk:Obs TIME_PERIOD="2011-10-04" OBS_VALUE="-0.28631" BBK_DIFF_A="0.11771"/>
      <bbk:Obs TIME_PERIOD="2011-10-03" OBS_VALUE="-0.40402" BBK_DIFF_A="0.09255"/>
      <bbk:Obs TIME_PERIOD="2011-10-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-10-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-09-30" OBS_VALUE="-0.49657" BBK_DIFF_A="0.02915"/>
      <bbk:Obs TIME_PERIOD="2011-09-29" OBS_VALUE="-0.52572" BBK_DIFF_A="-0.02127"/>
      <bbk:Obs TIME_PERIOD="2011-09-28" OBS_VALUE="-0.50445" BBK_DIFF_A="0.00278"/>
      <bbk:Obs TIME_PERIOD="2011-09-27" OBS_VALUE="-0.50723" BBK_DIFF_A="-0.05219"/>
      <bbk:Obs TIME_PERIOD="2011-09-26" OBS_VALUE="-0.45504" BBK_DIFF_A="-0.10068"/>
      <bbk:Obs TIME_PERIOD="2011-09-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-09-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-09-23" OBS_VALUE="-0.35436" BBK_DIFF_A="-0.0141"/>
      <bbk:Obs TIME_PERIOD="2011-09-22" OBS_VALUE="-0.34026" BBK_DIFF_A="0.12747"/>
      <bbk:Obs TIME_PERIOD="2011-09-21" OBS_VALUE="-0.46773" BBK_DIFF_A="-0.06024"/>
      <bbk:Obs TIME_PERIOD="2011-09-20" OBS_VALUE="-0.40749" BBK_DIFF_A="-0.02716"/>
      <bbk:Obs TIME_PERIOD="2011-09-19" OBS_VALUE="-0.38033" BBK_DIFF_A="0.10864"/>
      <bbk:Obs TIME_PERIOD="2011-09-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-09-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-09-16" OBS_VALUE="-0.48897" BBK_DIFF_A="0.002"/>
      <bbk:Obs TIME_PERIOD="2011-09-15" OBS_VALUE="-0.49097" BBK_DIFF_A="-0.16843"/>
      <bbk:Obs TIME_PERIOD="2011-09-14" OBS_VALUE="-0.32254" BBK_DIFF_A="0.07383"/>
      <bbk:Obs TIME_PERIOD="2011-09-13" OBS_VALUE="-0.39637" BBK_DIFF_A="0.07891"/>
      <bbk:Obs TIME_PERIOD="2011-09-12" OBS_VALUE="-0.47528" BBK_DIFF_A="0.06186"/>
      <bbk:Obs TIME_PERIOD="2011-09-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-09-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-09-09" OBS_VALUE="-0.53714" BBK_DIFF_A="-0.00472"/>
      <bbk:Obs TIME_PERIOD="2011-09-08" OBS_VALUE="-0.53242" BBK_DIFF_A="0.03515"/>
      <bbk:Obs TIME_PERIOD="2011-09-07" OBS_VALUE="-0.56757" BBK_DIFF_A="1.1338"/>
      <bbk:Obs TIME_PERIOD="2011-09-06" OBS_VALUE="-1.70137" BBK_DIFF_A="0.00786"/>
      <bbk:Obs TIME_PERIOD="2011-09-05" OBS_VALUE="-1.70923" BBK_DIFF_A="0.08865"/>
      <bbk:Obs TIME_PERIOD="2011-09-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-09-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-09-02" OBS_VALUE="-1.79788" BBK_DIFF_A="-0.02726"/>
      <bbk:Obs TIME_PERIOD="2011-09-01" OBS_VALUE="-1.77062" BBK_DIFF_A="0.02638"/>
      <bbk:Obs TIME_PERIOD="2011-08-31" OBS_VALUE="-1.797" BBK_DIFF_A="0.01879"/>
      <bbk:Obs TIME_PERIOD="2011-08-30" OBS_VALUE="-1.81579" BBK_DIFF_A="-0.01544"/>
      <bbk:Obs TIME_PERIOD="2011-08-29" OBS_VALUE="-1.80035" BBK_DIFF_A="0.02412"/>
      <bbk:Obs TIME_PERIOD="2011-08-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-08-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-08-26" OBS_VALUE="-1.82447" BBK_DIFF_A="-0.05654"/>
      <bbk:Obs TIME_PERIOD="2011-08-25" OBS_VALUE="-1.76793" BBK_DIFF_A="0.06472"/>
      <bbk:Obs TIME_PERIOD="2011-08-24" OBS_VALUE="-1.83265" BBK_DIFF_A="-0.04396"/>
      <bbk:Obs TIME_PERIOD="2011-08-23" OBS_VALUE="-1.78869" BBK_DIFF_A="-0.08156"/>
      <bbk:Obs TIME_PERIOD="2011-08-22" OBS_VALUE="-1.70713" BBK_DIFF_A="0.13206"/>
      <bbk:Obs TIME_PERIOD="2011-08-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-08-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-08-19" OBS_VALUE="-1.83919" BBK_DIFF_A="0.18444"/>
      <bbk:Obs TIME_PERIOD="2011-08-18" OBS_VALUE="-2.02363" BBK_DIFF_A="0.05731"/>
      <bbk:Obs TIME_PERIOD="2011-08-17" OBS_VALUE="-2.08094" BBK_DIFF_A="0.06964"/>
      <bbk:Obs TIME_PERIOD="2011-08-16" OBS_VALUE="-2.15058" BBK_DIFF_A="-0.12099"/>
      <bbk:Obs TIME_PERIOD="2011-08-15" OBS_VALUE="-2.02959" BBK_DIFF_A="-0.1508"/>
      <bbk:Obs TIME_PERIOD="2011-08-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-08-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-08-12" OBS_VALUE="-1.87879" BBK_DIFF_A="0.03841"/>
      <bbk:Obs TIME_PERIOD="2011-08-11" OBS_VALUE="-1.9172" BBK_DIFF_A="-0.08137"/>
      <bbk:Obs TIME_PERIOD="2011-08-10" OBS_VALUE="-1.83583" BBK_DIFF_A="-0.07145"/>
      <bbk:Obs TIME_PERIOD="2011-08-09" OBS_VALUE="-1.76438" BBK_DIFF_A="0.19592"/>
      <bbk:Obs TIME_PERIOD="2011-08-08" OBS_VALUE="-1.9603" BBK_DIFF_A="-0.22875"/>
      <bbk:Obs TIME_PERIOD="2011-08-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-08-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-08-05" OBS_VALUE="-1.73155" BBK_DIFF_A="-0.10227"/>
      <bbk:Obs TIME_PERIOD="2011-08-04" OBS_VALUE="-1.62928" BBK_DIFF_A="-0.00527"/>
      <bbk:Obs TIME_PERIOD="2011-08-03" OBS_VALUE="-1.62401" BBK_DIFF_A="-1.4186"/>
      <bbk:Obs TIME_PERIOD="2011-08-02" OBS_VALUE="-0.20541" BBK_DIFF_A="0.12031"/>
      <bbk:Obs TIME_PERIOD="2011-08-01" OBS_VALUE="-0.32572" BBK_DIFF_A="0.04368"/>
      <bbk:Obs TIME_PERIOD="2011-07-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-07-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-07-29" OBS_VALUE="-0.3694" BBK_DIFF_A="-0.06277"/>
      <bbk:Obs TIME_PERIOD="2011-07-28" OBS_VALUE="-0.30663" BBK_DIFF_A="0.03794"/>
      <bbk:Obs TIME_PERIOD="2011-07-27" OBS_VALUE="-0.34457" BBK_DIFF_A="0.04483"/>
      <bbk:Obs TIME_PERIOD="2011-07-26" OBS_VALUE="-0.3894" BBK_DIFF_A="0.05334"/>
      <bbk:Obs TIME_PERIOD="2011-07-25" OBS_VALUE="-0.44274" BBK_DIFF_A="0.12974"/>
      <bbk:Obs TIME_PERIOD="2011-07-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-07-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-07-22" OBS_VALUE="-0.57248" BBK_DIFF_A="-0.08781"/>
      <bbk:Obs TIME_PERIOD="2011-07-21" OBS_VALUE="-0.48467" BBK_DIFF_A="0.00175"/>
      <bbk:Obs TIME_PERIOD="2011-07-20" OBS_VALUE="-0.48642" BBK_DIFF_A="-0.12259"/>
      <bbk:Obs TIME_PERIOD="2011-07-19" OBS_VALUE="-0.36383" BBK_DIFF_A="-0.10933"/>
      <bbk:Obs TIME_PERIOD="2011-07-18" OBS_VALUE="-0.2545" BBK_DIFF_A="0.33801"/>
      <bbk:Obs TIME_PERIOD="2011-07-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-07-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-07-15" OBS_VALUE="-0.59251" BBK_DIFF_A="-0.26319"/>
      <bbk:Obs TIME_PERIOD="2011-07-14" OBS_VALUE="-0.32932" BBK_DIFF_A="-0.0479"/>
      <bbk:Obs TIME_PERIOD="2011-07-13" OBS_VALUE="-0.28142" BBK_DIFF_A="-0.04635"/>
      <bbk:Obs TIME_PERIOD="2011-07-12" OBS_VALUE="-0.23507" BBK_DIFF_A="8.5E-4"/>
      <bbk:Obs TIME_PERIOD="2011-07-11" OBS_VALUE="-0.23592" BBK_DIFF_A="0.14956"/>
      <bbk:Obs TIME_PERIOD="2011-07-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-07-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-07-08" OBS_VALUE="-0.38548" BBK_DIFF_A="0.01301"/>
      <bbk:Obs TIME_PERIOD="2011-07-07" OBS_VALUE="-0.39849" BBK_DIFF_A="0.03604"/>
      <bbk:Obs TIME_PERIOD="2011-07-06" OBS_VALUE="-0.43453" BBK_DIFF_A="0.07435"/>
      <bbk:Obs TIME_PERIOD="2011-07-05" OBS_VALUE="-0.50888" BBK_DIFF_A="0.0067"/>
      <bbk:Obs TIME_PERIOD="2011-07-04" OBS_VALUE="-0.51558" BBK_DIFF_A="0.03985"/>
      <bbk:Obs TIME_PERIOD="2011-07-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-07-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-07-01" OBS_VALUE="-0.55543" BBK_DIFF_A="0.00487"/>
      <bbk:Obs TIME_PERIOD="2011-06-30" OBS_VALUE="-0.5603" BBK_DIFF_A="-0.05535"/>
      <bbk:Obs TIME_PERIOD="2011-06-29" OBS_VALUE="-0.50495" BBK_DIFF_A="-0.03719"/>
      <bbk:Obs TIME_PERIOD="2011-06-28" OBS_VALUE="-0.46776" BBK_DIFF_A="8.8E-4"/>
      <bbk:Obs TIME_PERIOD="2011-06-27" OBS_VALUE="-0.46864" BBK_DIFF_A="0.2017"/>
      <bbk:Obs TIME_PERIOD="2011-06-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-06-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-06-24" OBS_VALUE="-0.67034" BBK_DIFF_A="-0.17451"/>
      <bbk:Obs TIME_PERIOD="2011-06-23" OBS_VALUE="-0.49583" BBK_DIFF_A="0.00259"/>
      <bbk:Obs TIME_PERIOD="2011-06-22" OBS_VALUE="-0.49842" BBK_DIFF_A="-0.06074"/>
      <bbk:Obs TIME_PERIOD="2011-06-21" OBS_VALUE="-0.43768" BBK_DIFF_A="-0.02411"/>
      <bbk:Obs TIME_PERIOD="2011-06-20" OBS_VALUE="-0.41357" BBK_DIFF_A="-0.02449"/>
      <bbk:Obs TIME_PERIOD="2011-06-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-06-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-06-17" OBS_VALUE="-0.38908" BBK_DIFF_A="0.13092"/>
      <bbk:Obs TIME_PERIOD="2011-06-16" OBS_VALUE="-0.52" BBK_DIFF_A="-0.12191"/>
      <bbk:Obs TIME_PERIOD="2011-06-15" OBS_VALUE="-0.39809" BBK_DIFF_A="-0.01506"/>
      <bbk:Obs TIME_PERIOD="2011-06-14" OBS_VALUE="-0.38303" BBK_DIFF_A="-0.00865"/>
      <bbk:Obs TIME_PERIOD="2011-06-13" OBS_VALUE="-0.37438" BBK_DIFF_A="0.69765"/>
      <bbk:Obs TIME_PERIOD="2011-06-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-06-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-06-10" OBS_VALUE="-1.07203" BBK_DIFF_A="-0.13422"/>
      <bbk:Obs TIME_PERIOD="2011-06-09" OBS_VALUE="-0.93781" BBK_DIFF_A="-0.07055"/>
      <bbk:Obs TIME_PERIOD="2011-06-08" OBS_VALUE="-0.86726" BBK_DIFF_A="-0.0044"/>
      <bbk:Obs TIME_PERIOD="2011-06-07" OBS_VALUE="-0.86286" BBK_DIFF_A="-0.05249"/>
      <bbk:Obs TIME_PERIOD="2011-06-06" OBS_VALUE="-0.81037" BBK_DIFF_A="0.01575"/>
      <bbk:Obs TIME_PERIOD="2011-06-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-06-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-06-03" OBS_VALUE="-0.82612" BBK_DIFF_A="0.06954"/>
      <bbk:Obs TIME_PERIOD="2011-06-02" OBS_VALUE="-0.89566" BBK_DIFF_A="0.03332"/>
      <bbk:Obs TIME_PERIOD="2011-06-01" OBS_VALUE="-0.92898" BBK_DIFF_A="-0.04118"/>
      <bbk:Obs TIME_PERIOD="2011-05-31" OBS_VALUE="-0.8878" BBK_DIFF_A="0.05487"/>
      <bbk:Obs TIME_PERIOD="2011-05-30" OBS_VALUE="-0.94267" BBK_DIFF_A="-0.01078"/>
      <bbk:Obs TIME_PERIOD="2011-05-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-05-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-05-27" OBS_VALUE="-0.93189" BBK_DIFF_A="-0.015"/>
      <bbk:Obs TIME_PERIOD="2011-05-26" OBS_VALUE="-0.91689" BBK_DIFF_A="0.01485"/>
      <bbk:Obs TIME_PERIOD="2011-05-25" OBS_VALUE="-0.93174" BBK_DIFF_A="-0.07899"/>
      <bbk:Obs TIME_PERIOD="2011-05-24" OBS_VALUE="-0.85275" BBK_DIFF_A="-0.02396"/>
      <bbk:Obs TIME_PERIOD="2011-05-23" OBS_VALUE="-0.82879" BBK_DIFF_A="0.04745"/>
      <bbk:Obs TIME_PERIOD="2011-05-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-05-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-05-20" OBS_VALUE="-0.87624" BBK_DIFF_A="-0.00383"/>
      <bbk:Obs TIME_PERIOD="2011-05-19" OBS_VALUE="-0.87241" BBK_DIFF_A="-0.05417"/>
      <bbk:Obs TIME_PERIOD="2011-05-18" OBS_VALUE="-0.81824" BBK_DIFF_A="0.09354"/>
      <bbk:Obs TIME_PERIOD="2011-05-17" OBS_VALUE="-0.91178" BBK_DIFF_A="-0.07608"/>
      <bbk:Obs TIME_PERIOD="2011-05-16" OBS_VALUE="-0.8357" BBK_DIFF_A="0.07139"/>
      <bbk:Obs TIME_PERIOD="2011-05-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-05-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-05-13" OBS_VALUE="-0.90709" BBK_DIFF_A="-0.03653"/>
      <bbk:Obs TIME_PERIOD="2011-05-12" OBS_VALUE="-0.87056" BBK_DIFF_A="0.0046"/>
      <bbk:Obs TIME_PERIOD="2011-05-11" OBS_VALUE="-0.87516" BBK_DIFF_A="-0.09384"/>
      <bbk:Obs TIME_PERIOD="2011-05-10" OBS_VALUE="-0.78132" BBK_DIFF_A="0.00669"/>
      <bbk:Obs TIME_PERIOD="2011-05-09" OBS_VALUE="-0.78801" BBK_DIFF_A="0.027"/>
      <bbk:Obs TIME_PERIOD="2011-05-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-05-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-05-06" OBS_VALUE="-0.81501" BBK_DIFF_A="-0.56096"/>
      <bbk:Obs TIME_PERIOD="2011-05-05" OBS_VALUE="-0.25405" BBK_DIFF_A="-0.01346"/>
      <bbk:Obs TIME_PERIOD="2011-05-04" OBS_VALUE="-0.24059" BBK_DIFF_A="0.18316"/>
      <bbk:Obs TIME_PERIOD="2011-05-03" OBS_VALUE="-0.42375" BBK_DIFF_A="0.01291"/>
      <bbk:Obs TIME_PERIOD="2011-05-02" OBS_VALUE="-0.43666" BBK_DIFF_A="-0.00251"/>
      <bbk:Obs TIME_PERIOD="2011-05-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-04-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-04-29" OBS_VALUE="-0.43415" BBK_DIFF_A="0.05519"/>
      <bbk:Obs TIME_PERIOD="2011-04-28" OBS_VALUE="-0.48934" BBK_DIFF_A="0.10915"/>
      <bbk:Obs TIME_PERIOD="2011-04-27" OBS_VALUE="-0.59849" BBK_DIFF_A="-0.00551"/>
      <bbk:Obs TIME_PERIOD="2011-04-26" OBS_VALUE="-0.59298" BBK_DIFF_A="-0.11096"/>
      <bbk:Obs TIME_PERIOD="2011-04-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-04-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-04-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-04-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-04-21" OBS_VALUE="-0.48202" BBK_DIFF_A="-0.00417"/>
      <bbk:Obs TIME_PERIOD="2011-04-20" OBS_VALUE="-0.47785" BBK_DIFF_A="0.0704"/>
      <bbk:Obs TIME_PERIOD="2011-04-19" OBS_VALUE="-0.54825" BBK_DIFF_A="0.04509"/>
      <bbk:Obs TIME_PERIOD="2011-04-18" OBS_VALUE="-0.59334" BBK_DIFF_A="-0.01066"/>
      <bbk:Obs TIME_PERIOD="2011-04-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-04-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-04-15" OBS_VALUE="-0.58268" BBK_DIFF_A="0.05239"/>
      <bbk:Obs TIME_PERIOD="2011-04-14" OBS_VALUE="-0.63507" BBK_DIFF_A="-0.01065"/>
      <bbk:Obs TIME_PERIOD="2011-04-13" OBS_VALUE="-0.62442" BBK_DIFF_A="-0.03562"/>
      <bbk:Obs TIME_PERIOD="2011-04-12" OBS_VALUE="-0.5888" BBK_DIFF_A="-0.03147"/>
      <bbk:Obs TIME_PERIOD="2011-04-11" OBS_VALUE="-0.55733" BBK_DIFF_A="0.02807"/>
      <bbk:Obs TIME_PERIOD="2011-04-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-04-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-04-08" OBS_VALUE="-0.5854" BBK_DIFF_A="0.07979"/>
      <bbk:Obs TIME_PERIOD="2011-04-07" OBS_VALUE="-0.66519" BBK_DIFF_A="-0.0632"/>
      <bbk:Obs TIME_PERIOD="2011-04-06" OBS_VALUE="-0.60199" BBK_DIFF_A="0.02795"/>
      <bbk:Obs TIME_PERIOD="2011-04-05" OBS_VALUE="-0.62994" BBK_DIFF_A="-9.0E-4"/>
      <bbk:Obs TIME_PERIOD="2011-04-04" OBS_VALUE="-0.62904" BBK_DIFF_A="-0.02971"/>
      <bbk:Obs TIME_PERIOD="2011-04-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-04-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-04-01" OBS_VALUE="-0.59933" BBK_DIFF_A="-0.01504"/>
      <bbk:Obs TIME_PERIOD="2011-03-31" OBS_VALUE="-0.58429" BBK_DIFF_A="0.03642"/>
      <bbk:Obs TIME_PERIOD="2011-03-30" OBS_VALUE="-0.62071" BBK_DIFF_A="0.0453"/>
      <bbk:Obs TIME_PERIOD="2011-03-29" OBS_VALUE="-0.66601" BBK_DIFF_A="0.00168"/>
      <bbk:Obs TIME_PERIOD="2011-03-28" OBS_VALUE="-0.66769" BBK_DIFF_A="0.00711"/>
      <bbk:Obs TIME_PERIOD="2011-03-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-03-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-03-25" OBS_VALUE="-0.6748" BBK_DIFF_A="0.05268"/>
      <bbk:Obs TIME_PERIOD="2011-03-24" OBS_VALUE="-0.72748" BBK_DIFF_A="-0.03017"/>
      <bbk:Obs TIME_PERIOD="2011-03-23" OBS_VALUE="-0.69731" BBK_DIFF_A="0.54338"/>
      <bbk:Obs TIME_PERIOD="2011-03-22" OBS_VALUE="-1.24069" BBK_DIFF_A="-0.05165"/>
      <bbk:Obs TIME_PERIOD="2011-03-21" OBS_VALUE="-1.18904" BBK_DIFF_A="-0.07828"/>
      <bbk:Obs TIME_PERIOD="2011-03-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-03-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-03-18" OBS_VALUE="-1.11076" BBK_DIFF_A="2.3E-4"/>
      <bbk:Obs TIME_PERIOD="2011-03-17" OBS_VALUE="-1.11099" BBK_DIFF_A="-0.00131"/>
      <bbk:Obs TIME_PERIOD="2011-03-16" OBS_VALUE="-1.10968" BBK_DIFF_A="-0.30538"/>
      <bbk:Obs TIME_PERIOD="2011-03-15" OBS_VALUE="-0.8043" BBK_DIFF_A="-0.08414"/>
      <bbk:Obs TIME_PERIOD="2011-03-14" OBS_VALUE="-0.72016" BBK_DIFF_A="-0.03521"/>
      <bbk:Obs TIME_PERIOD="2011-03-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-03-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-03-11" OBS_VALUE="-0.68495" BBK_DIFF_A="-0.03341"/>
      <bbk:Obs TIME_PERIOD="2011-03-10" OBS_VALUE="-0.65154" BBK_DIFF_A="-0.01094"/>
      <bbk:Obs TIME_PERIOD="2011-03-09" OBS_VALUE="-0.6406" BBK_DIFF_A="0.00851"/>
      <bbk:Obs TIME_PERIOD="2011-03-08" OBS_VALUE="-0.64911" BBK_DIFF_A="-0.01007"/>
      <bbk:Obs TIME_PERIOD="2011-03-07" OBS_VALUE="-0.63904" BBK_DIFF_A="1.05466"/>
      <bbk:Obs TIME_PERIOD="2011-03-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-03-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-03-04" OBS_VALUE="-1.6937" BBK_DIFF_A="-0.68455"/>
      <bbk:Obs TIME_PERIOD="2011-03-03" OBS_VALUE="-1.00915" BBK_DIFF_A="-0.05342"/>
      <bbk:Obs TIME_PERIOD="2011-03-02" OBS_VALUE="-0.95573" BBK_DIFF_A="-0.01214"/>
      <bbk:Obs TIME_PERIOD="2011-03-01" OBS_VALUE="-0.94359" BBK_DIFF_A="-0.05539"/>
      <bbk:Obs TIME_PERIOD="2011-02-28" OBS_VALUE="-0.8882" BBK_DIFF_A="-0.00329"/>
      <bbk:Obs TIME_PERIOD="2011-02-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-02-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-02-25" OBS_VALUE="-0.88491" BBK_DIFF_A="0.01909"/>
      <bbk:Obs TIME_PERIOD="2011-02-24" OBS_VALUE="-0.904" BBK_DIFF_A="0.00533"/>
      <bbk:Obs TIME_PERIOD="2011-02-23" OBS_VALUE="-0.90933" BBK_DIFF_A="0.05505"/>
      <bbk:Obs TIME_PERIOD="2011-02-22" OBS_VALUE="-0.96438" BBK_DIFF_A="0.08469"/>
      <bbk:Obs TIME_PERIOD="2011-02-21" OBS_VALUE="-1.04907" BBK_DIFF_A="0.01498"/>
      <bbk:Obs TIME_PERIOD="2011-02-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-02-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-02-18" OBS_VALUE="-1.06405" BBK_DIFF_A="0.04351"/>
      <bbk:Obs TIME_PERIOD="2011-02-17" OBS_VALUE="-1.10756" BBK_DIFF_A="-0.01479"/>
      <bbk:Obs TIME_PERIOD="2011-02-16" OBS_VALUE="-1.09277" BBK_DIFF_A="0.07752"/>
      <bbk:Obs TIME_PERIOD="2011-02-15" OBS_VALUE="-1.17029" BBK_DIFF_A="-0.00863"/>
      <bbk:Obs TIME_PERIOD="2011-02-14" OBS_VALUE="-1.16166" BBK_DIFF_A="-0.03275"/>
      <bbk:Obs TIME_PERIOD="2011-02-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-02-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-02-11" OBS_VALUE="-1.12891" BBK_DIFF_A="-0.02424"/>
      <bbk:Obs TIME_PERIOD="2011-02-10" OBS_VALUE="-1.10467" BBK_DIFF_A="-0.01037"/>
      <bbk:Obs TIME_PERIOD="2011-02-09" OBS_VALUE="-1.0943" BBK_DIFF_A="0.01264"/>
      <bbk:Obs TIME_PERIOD="2011-02-08" OBS_VALUE="-1.10694" BBK_DIFF_A="-0.02192"/>
      <bbk:Obs TIME_PERIOD="2011-02-07" OBS_VALUE="-1.08502" BBK_DIFF_A="-0.07398"/>
      <bbk:Obs TIME_PERIOD="2011-02-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-02-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-02-04" OBS_VALUE="-1.01104" BBK_DIFF_A="-0.00665"/>
      <bbk:Obs TIME_PERIOD="2011-02-03" OBS_VALUE="-1.00439" BBK_DIFF_A="0.02734"/>
      <bbk:Obs TIME_PERIOD="2011-02-02" OBS_VALUE="-1.03173" BBK_DIFF_A="-0.04478"/>
      <bbk:Obs TIME_PERIOD="2011-02-01" OBS_VALUE="-0.98695" BBK_DIFF_A="-0.03567"/>
      <bbk:Obs TIME_PERIOD="2011-01-31" OBS_VALUE="-0.95128" BBK_DIFF_A="0.07576"/>
      <bbk:Obs TIME_PERIOD="2011-01-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-01-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-01-28" OBS_VALUE="-1.02704" BBK_DIFF_A="0.0448"/>
      <bbk:Obs TIME_PERIOD="2011-01-27" OBS_VALUE="-1.07184" BBK_DIFF_A="-0.04972"/>
      <bbk:Obs TIME_PERIOD="2011-01-26" OBS_VALUE="-1.02212" BBK_DIFF_A="0.05067"/>
      <bbk:Obs TIME_PERIOD="2011-01-25" OBS_VALUE="-1.07279" BBK_DIFF_A="0.03318"/>
      <bbk:Obs TIME_PERIOD="2011-01-24" OBS_VALUE="-1.10597" BBK_DIFF_A="0.00398"/>
      <bbk:Obs TIME_PERIOD="2011-01-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-01-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-01-21" OBS_VALUE="-1.10995" BBK_DIFF_A="-0.03156"/>
      <bbk:Obs TIME_PERIOD="2011-01-20" OBS_VALUE="-1.07839" BBK_DIFF_A="0.01349"/>
      <bbk:Obs TIME_PERIOD="2011-01-19" OBS_VALUE="-1.09188" BBK_DIFF_A="-0.00526"/>
      <bbk:Obs TIME_PERIOD="2011-01-18" OBS_VALUE="-1.08662" BBK_DIFF_A="-0.10054"/>
      <bbk:Obs TIME_PERIOD="2011-01-17" OBS_VALUE="-0.98608" BBK_DIFF_A="-0.0017"/>
      <bbk:Obs TIME_PERIOD="2011-01-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-01-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-01-14" OBS_VALUE="-0.98438" BBK_DIFF_A="0.04196"/>
      <bbk:Obs TIME_PERIOD="2011-01-13" OBS_VALUE="-1.02634" BBK_DIFF_A="-0.12742"/>
      <bbk:Obs TIME_PERIOD="2011-01-12" OBS_VALUE="-0.89892" BBK_DIFF_A="-0.03634"/>
      <bbk:Obs TIME_PERIOD="2011-01-11" OBS_VALUE="-0.86258" BBK_DIFF_A="0.04206"/>
      <bbk:Obs TIME_PERIOD="2011-01-10" OBS_VALUE="-0.90464" BBK_DIFF_A="0.03511"/>
      <bbk:Obs TIME_PERIOD="2011-01-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-01-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-01-07" OBS_VALUE="-0.93975" BBK_DIFF_A="0.04251"/>
      <bbk:Obs TIME_PERIOD="2011-01-06" OBS_VALUE="-0.98226" BBK_DIFF_A="-0.23556"/>
      <bbk:Obs TIME_PERIOD="2011-01-05" OBS_VALUE="-0.7467" BBK_DIFF_A="0.66817"/>
      <bbk:Obs TIME_PERIOD="2011-01-04" OBS_VALUE="-1.41487" BBK_DIFF_A="-0.47335"/>
      <bbk:Obs TIME_PERIOD="2011-01-03" OBS_VALUE="-0.94152" BBK_DIFF_A="0.15675"/>
      <bbk:Obs TIME_PERIOD="2011-01-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2011-01-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-12-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-12-30" OBS_VALUE="-1.09827" BBK_DIFF_A="0.43311"/>
      <bbk:Obs TIME_PERIOD="2010-12-29" OBS_VALUE="-1.53138" BBK_DIFF_A="-0.31033"/>
      <bbk:Obs TIME_PERIOD="2010-12-28" OBS_VALUE="-1.22105" BBK_DIFF_A="-0.05219"/>
      <bbk:Obs TIME_PERIOD="2010-12-27" OBS_VALUE="-1.16886" BBK_DIFF_A="-0.18224"/>
      <bbk:Obs TIME_PERIOD="2010-12-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-12-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-12-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-12-23" OBS_VALUE="-0.98662" BBK_DIFF_A="0.03726"/>
      <bbk:Obs TIME_PERIOD="2010-12-22" OBS_VALUE="-1.02388" BBK_DIFF_A="-0.07908"/>
      <bbk:Obs TIME_PERIOD="2010-12-21" OBS_VALUE="-0.9448" BBK_DIFF_A="0.0151"/>
      <bbk:Obs TIME_PERIOD="2010-12-20" OBS_VALUE="-0.9599" BBK_DIFF_A="0.33051"/>
      <bbk:Obs TIME_PERIOD="2010-12-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-12-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-12-17" OBS_VALUE="-1.29041" BBK_DIFF_A="-0.07853"/>
      <bbk:Obs TIME_PERIOD="2010-12-16" OBS_VALUE="-1.21188" BBK_DIFF_A="-0.01586"/>
      <bbk:Obs TIME_PERIOD="2010-12-15" OBS_VALUE="-1.19602" BBK_DIFF_A="0.05839"/>
      <bbk:Obs TIME_PERIOD="2010-12-14" OBS_VALUE="-1.25441" BBK_DIFF_A="0.28211"/>
      <bbk:Obs TIME_PERIOD="2010-12-13" OBS_VALUE="-1.53652" BBK_DIFF_A="0.01209"/>
      <bbk:Obs TIME_PERIOD="2010-12-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-12-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-12-10" OBS_VALUE="-1.54861" BBK_DIFF_A="-0.11349"/>
      <bbk:Obs TIME_PERIOD="2010-12-09" OBS_VALUE="-1.43512" BBK_DIFF_A="-0.12168"/>
      <bbk:Obs TIME_PERIOD="2010-12-08" OBS_VALUE="-1.31344" BBK_DIFF_A="0.5126"/>
      <bbk:Obs TIME_PERIOD="2010-12-07" OBS_VALUE="-1.82604" BBK_DIFF_A="-0.02866"/>
      <bbk:Obs TIME_PERIOD="2010-12-06" OBS_VALUE="-1.79738" BBK_DIFF_A="-0.41136"/>
      <bbk:Obs TIME_PERIOD="2010-12-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-12-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-12-03" OBS_VALUE="-1.38602" BBK_DIFF_A="-0.20296"/>
      <bbk:Obs TIME_PERIOD="2010-12-02" OBS_VALUE="-1.18306" BBK_DIFF_A="-0.05696"/>
      <bbk:Obs TIME_PERIOD="2010-12-01" OBS_VALUE="-1.1261" BBK_DIFF_A="0.06127"/>
      <bbk:Obs TIME_PERIOD="2010-11-30" OBS_VALUE="-1.18737" BBK_DIFF_A="-0.18823"/>
      <bbk:Obs TIME_PERIOD="2010-11-29" OBS_VALUE="-0.99914" BBK_DIFF_A="-0.46173"/>
      <bbk:Obs TIME_PERIOD="2010-11-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-11-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-11-26" OBS_VALUE="-0.53741" BBK_DIFF_A="0.18274"/>
      <bbk:Obs TIME_PERIOD="2010-11-25" OBS_VALUE="-0.72015" BBK_DIFF_A="-0.35159"/>
      <bbk:Obs TIME_PERIOD="2010-11-24" OBS_VALUE="-0.36856" BBK_DIFF_A="0.05291"/>
      <bbk:Obs TIME_PERIOD="2010-11-23" OBS_VALUE="-0.42147" BBK_DIFF_A="0.20927"/>
      <bbk:Obs TIME_PERIOD="2010-11-22" OBS_VALUE="-0.63074" BBK_DIFF_A="-0.11043"/>
      <bbk:Obs TIME_PERIOD="2010-11-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-11-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-11-19" OBS_VALUE="-0.52031" BBK_DIFF_A="-0.03444"/>
      <bbk:Obs TIME_PERIOD="2010-11-18" OBS_VALUE="-0.48587" BBK_DIFF_A="-0.01667"/>
      <bbk:Obs TIME_PERIOD="2010-11-17" OBS_VALUE="-0.4692" BBK_DIFF_A="-0.05476"/>
      <bbk:Obs TIME_PERIOD="2010-11-16" OBS_VALUE="-0.41444" BBK_DIFF_A="-0.03765"/>
      <bbk:Obs TIME_PERIOD="2010-11-15" OBS_VALUE="-0.37679" BBK_DIFF_A="0.22034"/>
      <bbk:Obs TIME_PERIOD="2010-11-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-11-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-11-12" OBS_VALUE="-0.59713" BBK_DIFF_A="-0.11661"/>
      <bbk:Obs TIME_PERIOD="2010-11-11" OBS_VALUE="-0.48052" BBK_DIFF_A="-0.26681"/>
      <bbk:Obs TIME_PERIOD="2010-11-10" OBS_VALUE="-0.21371" BBK_DIFF_A="-0.12869"/>
      <bbk:Obs TIME_PERIOD="2010-11-09" OBS_VALUE="-0.08502" BBK_DIFF_A="-0.00726"/>
      <bbk:Obs TIME_PERIOD="2010-11-08" OBS_VALUE="-0.07776" BBK_DIFF_A="-0.04602"/>
      <bbk:Obs TIME_PERIOD="2010-11-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-11-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-11-05" OBS_VALUE="-0.03174" BBK_DIFF_A="0.10981"/>
      <bbk:Obs TIME_PERIOD="2010-11-04" OBS_VALUE="-0.14155" BBK_DIFF_A="-0.13312"/>
      <bbk:Obs TIME_PERIOD="2010-11-03" OBS_VALUE="-0.00843" BBK_DIFF_A="0.05339"/>
      <bbk:Obs TIME_PERIOD="2010-11-02" OBS_VALUE="-0.06182" BBK_DIFF_A="0.03186"/>
      <bbk:Obs TIME_PERIOD="2010-11-01" OBS_VALUE="-0.09368" BBK_DIFF_A="0.05871"/>
      <bbk:Obs TIME_PERIOD="2010-10-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-10-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-10-29" OBS_VALUE="-0.15239" BBK_DIFF_A="0.11275"/>
      <bbk:Obs TIME_PERIOD="2010-10-28" OBS_VALUE="-0.26514" BBK_DIFF_A="0.13987"/>
      <bbk:Obs TIME_PERIOD="2010-10-27" OBS_VALUE="-0.40501" BBK_DIFF_A="-0.06282"/>
      <bbk:Obs TIME_PERIOD="2010-10-26" OBS_VALUE="-0.34219" BBK_DIFF_A="-0.15804"/>
      <bbk:Obs TIME_PERIOD="2010-10-25" OBS_VALUE="-0.18415" BBK_DIFF_A="0.01695"/>
      <bbk:Obs TIME_PERIOD="2010-10-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-10-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-10-22" OBS_VALUE="-0.2011" BBK_DIFF_A="-0.02564"/>
      <bbk:Obs TIME_PERIOD="2010-10-21" OBS_VALUE="-0.17546" BBK_DIFF_A="0.20408"/>
      <bbk:Obs TIME_PERIOD="2010-10-20" OBS_VALUE="-0.37954" BBK_DIFF_A="-0.15409"/>
      <bbk:Obs TIME_PERIOD="2010-10-19" OBS_VALUE="-0.22545" BBK_DIFF_A="0.0212"/>
      <bbk:Obs TIME_PERIOD="2010-10-18" OBS_VALUE="-0.24665" BBK_DIFF_A="-0.03623"/>
      <bbk:Obs TIME_PERIOD="2010-10-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-10-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-10-15" OBS_VALUE="-0.21042" BBK_DIFF_A="-0.01577"/>
      <bbk:Obs TIME_PERIOD="2010-10-14" OBS_VALUE="-0.19465" BBK_DIFF_A="0.00714"/>
      <bbk:Obs TIME_PERIOD="2010-10-13" OBS_VALUE="-0.20179" BBK_DIFF_A="-0.07382"/>
      <bbk:Obs TIME_PERIOD="2010-10-12" OBS_VALUE="-0.12797" BBK_DIFF_A="0.05541"/>
      <bbk:Obs TIME_PERIOD="2010-10-11" OBS_VALUE="-0.18338" BBK_DIFF_A="-0.03744"/>
      <bbk:Obs TIME_PERIOD="2010-10-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-10-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-10-08" OBS_VALUE="-0.14594" BBK_DIFF_A="0.00371"/>
      <bbk:Obs TIME_PERIOD="2010-10-07" OBS_VALUE="-0.14965" BBK_DIFF_A="-0.02462"/>
      <bbk:Obs TIME_PERIOD="2010-10-06" OBS_VALUE="-0.12503" BBK_DIFF_A="0.01451"/>
      <bbk:Obs TIME_PERIOD="2010-10-05" OBS_VALUE="-0.13954" BBK_DIFF_A="-0.00653"/>
      <bbk:Obs TIME_PERIOD="2010-10-04" OBS_VALUE="-0.13301" BBK_DIFF_A="-0.02607"/>
      <bbk:Obs TIME_PERIOD="2010-10-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-10-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-10-01" OBS_VALUE="-0.10694" BBK_DIFF_A="0.25927"/>
      <bbk:Obs TIME_PERIOD="2010-09-30" OBS_VALUE="-0.36621" BBK_DIFF_A="0.01812"/>
      <bbk:Obs TIME_PERIOD="2010-09-29" OBS_VALUE="-0.38433" BBK_DIFF_A="0.02308"/>
      <bbk:Obs TIME_PERIOD="2010-09-28" OBS_VALUE="-0.40741" BBK_DIFF_A="0.03809"/>
      <bbk:Obs TIME_PERIOD="2010-09-27" OBS_VALUE="-0.4455" BBK_DIFF_A="0.11717"/>
      <bbk:Obs TIME_PERIOD="2010-09-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-09-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-09-24" OBS_VALUE="-0.56267" BBK_DIFF_A="0.06601"/>
      <bbk:Obs TIME_PERIOD="2010-09-23" OBS_VALUE="-0.62868" BBK_DIFF_A="0.484"/>
      <bbk:Obs TIME_PERIOD="2010-09-22" OBS_VALUE="-1.11268" BBK_DIFF_A="-0.05601"/>
      <bbk:Obs TIME_PERIOD="2010-09-21" OBS_VALUE="-1.05667" BBK_DIFF_A="-0.29211"/>
      <bbk:Obs TIME_PERIOD="2010-09-20" OBS_VALUE="-0.76456" BBK_DIFF_A="-0.10944"/>
      <bbk:Obs TIME_PERIOD="2010-09-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-09-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-09-17" OBS_VALUE="-0.65512" BBK_DIFF_A="-0.07961"/>
      <bbk:Obs TIME_PERIOD="2010-09-16" OBS_VALUE="-0.57551" BBK_DIFF_A="0.29253"/>
      <bbk:Obs TIME_PERIOD="2010-09-15" OBS_VALUE="-0.86804" BBK_DIFF_A="0.39646"/>
      <bbk:Obs TIME_PERIOD="2010-09-14" OBS_VALUE="-1.2645" BBK_DIFF_A="0.01236"/>
      <bbk:Obs TIME_PERIOD="2010-09-13" OBS_VALUE="-1.27686" BBK_DIFF_A="0.18888"/>
      <bbk:Obs TIME_PERIOD="2010-09-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-09-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-09-10" OBS_VALUE="-1.46574" BBK_DIFF_A="-0.44517"/>
      <bbk:Obs TIME_PERIOD="2010-09-09" OBS_VALUE="-1.02057" BBK_DIFF_A="-0.03361"/>
      <bbk:Obs TIME_PERIOD="2010-09-08" OBS_VALUE="-0.98696" BBK_DIFF_A="0.24073"/>
      <bbk:Obs TIME_PERIOD="2010-09-07" OBS_VALUE="-1.22769" BBK_DIFF_A="-0.20513"/>
      <bbk:Obs TIME_PERIOD="2010-09-06" OBS_VALUE="-1.02256" BBK_DIFF_A="0.11155"/>
      <bbk:Obs TIME_PERIOD="2010-09-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-09-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-09-03" OBS_VALUE="-1.13411" BBK_DIFF_A="-0.53186"/>
      <bbk:Obs TIME_PERIOD="2010-09-02" OBS_VALUE="-0.60225" BBK_DIFF_A="0.81274"/>
      <bbk:Obs TIME_PERIOD="2010-09-01" OBS_VALUE="-1.41499" BBK_DIFF_A="-0.37096"/>
      <bbk:Obs TIME_PERIOD="2010-08-31" OBS_VALUE="-1.04403" BBK_DIFF_A="0.58395"/>
      <bbk:Obs TIME_PERIOD="2010-08-30" OBS_VALUE="-1.62798" BBK_DIFF_A="-0.12063"/>
      <bbk:Obs TIME_PERIOD="2010-08-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-08-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-08-27" OBS_VALUE="-1.50735" BBK_DIFF_A="-0.21399"/>
      <bbk:Obs TIME_PERIOD="2010-08-26" OBS_VALUE="-1.29336" BBK_DIFF_A="-0.88711"/>
      <bbk:Obs TIME_PERIOD="2010-08-25" OBS_VALUE="-0.40625" BBK_DIFF_A="0.56272"/>
      <bbk:Obs TIME_PERIOD="2010-08-24" OBS_VALUE="-0.96897" BBK_DIFF_A="0.06664"/>
      <bbk:Obs TIME_PERIOD="2010-08-23" OBS_VALUE="-1.03561" BBK_DIFF_A="-0.01259"/>
      <bbk:Obs TIME_PERIOD="2010-08-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-08-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-08-20" OBS_VALUE="-1.02302" BBK_DIFF_A="0.36105"/>
      <bbk:Obs TIME_PERIOD="2010-08-19" OBS_VALUE="-1.38407" BBK_DIFF_A="0.26513"/>
      <bbk:Obs TIME_PERIOD="2010-08-18" OBS_VALUE="-1.6492" BBK_DIFF_A="-0.38129"/>
      <bbk:Obs TIME_PERIOD="2010-08-17" OBS_VALUE="-1.26791" BBK_DIFF_A="-0.16366"/>
      <bbk:Obs TIME_PERIOD="2010-08-16" OBS_VALUE="-1.10425" BBK_DIFF_A="0.65225"/>
      <bbk:Obs TIME_PERIOD="2010-08-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-08-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-08-13" OBS_VALUE="-1.7565" BBK_DIFF_A="0.1613"/>
      <bbk:Obs TIME_PERIOD="2010-08-12" OBS_VALUE="-1.9178" BBK_DIFF_A="0.10383"/>
      <bbk:Obs TIME_PERIOD="2010-08-11" OBS_VALUE="-2.02163" BBK_DIFF_A="0.06022"/>
      <bbk:Obs TIME_PERIOD="2010-08-10" OBS_VALUE="-2.08185" BBK_DIFF_A="0.01871"/>
      <bbk:Obs TIME_PERIOD="2010-08-09" OBS_VALUE="-2.10056" BBK_DIFF_A="0.21917"/>
      <bbk:Obs TIME_PERIOD="2010-08-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-08-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-08-06" OBS_VALUE="-2.31973" BBK_DIFF_A="0.05972"/>
      <bbk:Obs TIME_PERIOD="2010-08-05" OBS_VALUE="-2.37945" BBK_DIFF_A="-0.19564"/>
      <bbk:Obs TIME_PERIOD="2010-08-04" OBS_VALUE="-2.18381" BBK_DIFF_A="0.05279"/>
      <bbk:Obs TIME_PERIOD="2010-08-03" OBS_VALUE="-2.2366" BBK_DIFF_A="0.09315"/>
      <bbk:Obs TIME_PERIOD="2010-08-02" OBS_VALUE="-2.32975" BBK_DIFF_A="-0.23225"/>
      <bbk:Obs TIME_PERIOD="2010-08-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-07-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-07-30" OBS_VALUE="-2.0975" BBK_DIFF_A="0.37238"/>
      <bbk:Obs TIME_PERIOD="2010-07-29" OBS_VALUE="-2.46988" BBK_DIFF_A="0.16029"/>
      <bbk:Obs TIME_PERIOD="2010-07-28" OBS_VALUE="-2.63017" BBK_DIFF_A="0.02405"/>
      <bbk:Obs TIME_PERIOD="2010-07-27" OBS_VALUE="-2.65422" BBK_DIFF_A="-5.4219"/>
      <bbk:Obs TIME_PERIOD="2010-07-26" OBS_VALUE="2.76768" BBK_DIFF_A="2.76554"/>
      <bbk:Obs TIME_PERIOD="2010-07-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-07-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-07-23" OBS_VALUE="0.00214" BBK_DIFF_A="0.00378"/>
      <bbk:Obs TIME_PERIOD="2010-07-22" OBS_VALUE="-0.00164" BBK_DIFF_A="1.8E-4"/>
      <bbk:Obs TIME_PERIOD="2010-07-21" OBS_VALUE="-0.00182" BBK_DIFF_A="0.02692"/>
      <bbk:Obs TIME_PERIOD="2010-07-20" OBS_VALUE="-0.02874" BBK_DIFF_A="-0.02251"/>
      <bbk:Obs TIME_PERIOD="2010-07-19" OBS_VALUE="-0.00623" BBK_DIFF_A="2.79869"/>
      <bbk:Obs TIME_PERIOD="2010-07-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-07-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-07-16" OBS_VALUE="-2.80492" BBK_DIFF_A="-0.04942"/>
      <bbk:Obs TIME_PERIOD="2010-07-15" OBS_VALUE="-2.7555" BBK_DIFF_A="-0.01261"/>
      <bbk:Obs TIME_PERIOD="2010-07-14" OBS_VALUE="-2.74289" BBK_DIFF_A="0.07064"/>
      <bbk:Obs TIME_PERIOD="2010-07-13" OBS_VALUE="-2.81353" BBK_DIFF_A="-0.11473"/>
      <bbk:Obs TIME_PERIOD="2010-07-12" OBS_VALUE="-2.6988" BBK_DIFF_A="-0.03772"/>
      <bbk:Obs TIME_PERIOD="2010-07-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-07-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-07-09" OBS_VALUE="-2.66108" BBK_DIFF_A="0.11778"/>
      <bbk:Obs TIME_PERIOD="2010-07-08" OBS_VALUE="-2.77886" BBK_DIFF_A="-0.00202"/>
      <bbk:Obs TIME_PERIOD="2010-07-07" OBS_VALUE="-2.77684" BBK_DIFF_A="-0.03006"/>
      <bbk:Obs TIME_PERIOD="2010-07-06" OBS_VALUE="-2.74678" BBK_DIFF_A="-0.11696"/>
      <bbk:Obs TIME_PERIOD="2010-07-05" OBS_VALUE="-2.62982" BBK_DIFF_A="-0.04264"/>
      <bbk:Obs TIME_PERIOD="2010-07-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-07-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-07-02" OBS_VALUE="-2.58718" BBK_DIFF_A="0.03685"/>
      <bbk:Obs TIME_PERIOD="2010-07-01" OBS_VALUE="-2.62403" BBK_DIFF_A="0.30789"/>
      <bbk:Obs TIME_PERIOD="2010-06-30" OBS_VALUE="-2.93192" BBK_DIFF_A="-0.18912"/>
      <bbk:Obs TIME_PERIOD="2010-06-29" OBS_VALUE="-2.7428" BBK_DIFF_A="0.19062"/>
      <bbk:Obs TIME_PERIOD="2010-06-28" OBS_VALUE="-2.93342" BBK_DIFF_A="-0.08107"/>
      <bbk:Obs TIME_PERIOD="2010-06-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-06-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-06-25" OBS_VALUE="-2.85235" BBK_DIFF_A="-0.01085"/>
      <bbk:Obs TIME_PERIOD="2010-06-24" OBS_VALUE="-2.8415" BBK_DIFF_A="0.17406"/>
      <bbk:Obs TIME_PERIOD="2010-06-23" OBS_VALUE="-3.01556" BBK_DIFF_A="-0.01663"/>
      <bbk:Obs TIME_PERIOD="2010-06-22" OBS_VALUE="-2.99893" BBK_DIFF_A="0.16346"/>
      <bbk:Obs TIME_PERIOD="2010-06-21" OBS_VALUE="-3.16239" BBK_DIFF_A="-0.07278"/>
      <bbk:Obs TIME_PERIOD="2010-06-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-06-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-06-18" OBS_VALUE="-3.08961" BBK_DIFF_A="-0.2833"/>
      <bbk:Obs TIME_PERIOD="2010-06-17" OBS_VALUE="-2.80631" BBK_DIFF_A="0.04423"/>
      <bbk:Obs TIME_PERIOD="2010-06-16" OBS_VALUE="-2.85054" BBK_DIFF_A="0.20539"/>
      <bbk:Obs TIME_PERIOD="2010-06-15" OBS_VALUE="-3.05593" BBK_DIFF_A="-0.45252"/>
      <bbk:Obs TIME_PERIOD="2010-06-14" OBS_VALUE="-2.60341" BBK_DIFF_A="-0.00324"/>
      <bbk:Obs TIME_PERIOD="2010-06-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-06-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-06-11" OBS_VALUE="-2.60017" BBK_DIFF_A="-0.16581"/>
      <bbk:Obs TIME_PERIOD="2010-06-10" OBS_VALUE="-2.43436" BBK_DIFF_A="-0.03308"/>
      <bbk:Obs TIME_PERIOD="2010-06-09" OBS_VALUE="-2.40128" BBK_DIFF_A="-0.08293"/>
      <bbk:Obs TIME_PERIOD="2010-06-08" OBS_VALUE="-2.31835" BBK_DIFF_A="0.36715"/>
      <bbk:Obs TIME_PERIOD="2010-06-07" OBS_VALUE="-2.6855" BBK_DIFF_A="0.16927"/>
      <bbk:Obs TIME_PERIOD="2010-06-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-06-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-06-04" OBS_VALUE="-2.85477" BBK_DIFF_A="0.17937"/>
      <bbk:Obs TIME_PERIOD="2010-06-03" OBS_VALUE="-3.03414" BBK_DIFF_A="-0.09308"/>
      <bbk:Obs TIME_PERIOD="2010-06-02" OBS_VALUE="-2.94106" BBK_DIFF_A="0.05586"/>
      <bbk:Obs TIME_PERIOD="2010-06-01" OBS_VALUE="-2.99692" BBK_DIFF_A="-0.17997"/>
      <bbk:Obs TIME_PERIOD="2010-05-31" OBS_VALUE="-2.81695" BBK_DIFF_A="0.11165"/>
      <bbk:Obs TIME_PERIOD="2010-05-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-05-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-05-28" OBS_VALUE="-2.9286" BBK_DIFF_A="0.0797"/>
      <bbk:Obs TIME_PERIOD="2010-05-27" OBS_VALUE="-3.0083" BBK_DIFF_A="-0.207"/>
      <bbk:Obs TIME_PERIOD="2010-05-26" OBS_VALUE="-2.8013" BBK_DIFF_A="0.16584"/>
      <bbk:Obs TIME_PERIOD="2010-05-25" OBS_VALUE="-2.96714" BBK_DIFF_A="-0.0783"/>
      <bbk:Obs TIME_PERIOD="2010-05-24" OBS_VALUE="-2.88884" BBK_DIFF_A="-0.08509"/>
      <bbk:Obs TIME_PERIOD="2010-05-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-05-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-05-21" OBS_VALUE="-2.80375" BBK_DIFF_A="0.32495"/>
      <bbk:Obs TIME_PERIOD="2010-05-20" OBS_VALUE="-3.1287" BBK_DIFF_A="-0.25384"/>
      <bbk:Obs TIME_PERIOD="2010-05-19" OBS_VALUE="-2.87486" BBK_DIFF_A="0.05626"/>
      <bbk:Obs TIME_PERIOD="2010-05-18" OBS_VALUE="-2.93112" BBK_DIFF_A="-0.10728"/>
      <bbk:Obs TIME_PERIOD="2010-05-17" OBS_VALUE="-2.82384" BBK_DIFF_A="0.3485"/>
      <bbk:Obs TIME_PERIOD="2010-05-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-05-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-05-14" OBS_VALUE="-3.17234" BBK_DIFF_A="-0.29863"/>
      <bbk:Obs TIME_PERIOD="2010-05-13" OBS_VALUE="-2.87371" BBK_DIFF_A="-0.64312"/>
      <bbk:Obs TIME_PERIOD="2010-05-12" OBS_VALUE="-2.23059" BBK_DIFF_A="-0.02264"/>
      <bbk:Obs TIME_PERIOD="2010-05-11" OBS_VALUE="-2.20795" BBK_DIFF_A="-0.17346"/>
      <bbk:Obs TIME_PERIOD="2010-05-10" OBS_VALUE="-2.03449" BBK_DIFF_A="0.34711"/>
      <bbk:Obs TIME_PERIOD="2010-05-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-05-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-05-07" OBS_VALUE="-2.3816" BBK_DIFF_A="-0.10217"/>
      <bbk:Obs TIME_PERIOD="2010-05-06" OBS_VALUE="-2.27943" BBK_DIFF_A="0.03199"/>
      <bbk:Obs TIME_PERIOD="2010-05-05" OBS_VALUE="-2.31142" BBK_DIFF_A="-0.05656"/>
      <bbk:Obs TIME_PERIOD="2010-05-04" OBS_VALUE="-2.25486" BBK_DIFF_A="-0.01722"/>
      <bbk:Obs TIME_PERIOD="2010-05-03" OBS_VALUE="-2.23764" BBK_DIFF_A="-0.31396"/>
      <bbk:Obs TIME_PERIOD="2010-05-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-05-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-04-30" OBS_VALUE="-1.92368" BBK_DIFF_A="0.06618"/>
      <bbk:Obs TIME_PERIOD="2010-04-29" OBS_VALUE="-1.98986" BBK_DIFF_A="-0.06309"/>
      <bbk:Obs TIME_PERIOD="2010-04-28" OBS_VALUE="-1.92677" BBK_DIFF_A="-0.17339"/>
      <bbk:Obs TIME_PERIOD="2010-04-27" OBS_VALUE="-1.75338" BBK_DIFF_A="-0.192"/>
      <bbk:Obs TIME_PERIOD="2010-04-26" OBS_VALUE="-1.56138" BBK_DIFF_A="0.5193"/>
      <bbk:Obs TIME_PERIOD="2010-04-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-04-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-04-23" OBS_VALUE="-2.08068" BBK_DIFF_A="-0.16643"/>
      <bbk:Obs TIME_PERIOD="2010-04-22" OBS_VALUE="-1.91425" BBK_DIFF_A="0.3746"/>
      <bbk:Obs TIME_PERIOD="2010-04-21" OBS_VALUE="-2.28885" BBK_DIFF_A="0.01097"/>
      <bbk:Obs TIME_PERIOD="2010-04-20" OBS_VALUE="-2.29982" BBK_DIFF_A="0.55726"/>
      <bbk:Obs TIME_PERIOD="2010-04-19" OBS_VALUE="-2.85708" BBK_DIFF_A="0.28366"/>
      <bbk:Obs TIME_PERIOD="2010-04-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-04-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-04-16" OBS_VALUE="-3.14074" BBK_DIFF_A="-0.0221"/>
      <bbk:Obs TIME_PERIOD="2010-04-15" OBS_VALUE="-3.11864" BBK_DIFF_A="-0.18252"/>
      <bbk:Obs TIME_PERIOD="2010-04-14" OBS_VALUE="-2.93612" BBK_DIFF_A="0.17332"/>
      <bbk:Obs TIME_PERIOD="2010-04-13" OBS_VALUE="-3.10944" BBK_DIFF_A="-0.25603"/>
      <bbk:Obs TIME_PERIOD="2010-04-12" OBS_VALUE="-2.85341" BBK_DIFF_A="-0.30293"/>
      <bbk:Obs TIME_PERIOD="2010-04-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-04-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-04-09" OBS_VALUE="-2.55048" BBK_DIFF_A="-0.23074"/>
      <bbk:Obs TIME_PERIOD="2010-04-08" OBS_VALUE="-2.31974" BBK_DIFF_A="0.39591"/>
      <bbk:Obs TIME_PERIOD="2010-04-07" OBS_VALUE="-2.71565" BBK_DIFF_A="-0.22699"/>
      <bbk:Obs TIME_PERIOD="2010-04-06" OBS_VALUE="-2.48866" BBK_DIFF_A="-0.1292"/>
      <bbk:Obs TIME_PERIOD="2010-04-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-04-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-04-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-04-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-04-01" OBS_VALUE="-2.35946" BBK_DIFF_A="-0.0993"/>
      <bbk:Obs TIME_PERIOD="2010-03-31" OBS_VALUE="-2.26016" BBK_DIFF_A="-0.59757"/>
      <bbk:Obs TIME_PERIOD="2010-03-30" OBS_VALUE="-1.66259" BBK_DIFF_A="0.16721"/>
      <bbk:Obs TIME_PERIOD="2010-03-29" OBS_VALUE="-1.8298" BBK_DIFF_A="0.10898"/>
      <bbk:Obs TIME_PERIOD="2010-03-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-03-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-03-26" OBS_VALUE="-1.93878" BBK_DIFF_A="-0.3877"/>
      <bbk:Obs TIME_PERIOD="2010-03-25" OBS_VALUE="-1.55108" BBK_DIFF_A="-0.15457"/>
      <bbk:Obs TIME_PERIOD="2010-03-24" OBS_VALUE="-1.39651" BBK_DIFF_A="0.14258"/>
      <bbk:Obs TIME_PERIOD="2010-03-23" OBS_VALUE="-1.53909" BBK_DIFF_A="0.04631"/>
      <bbk:Obs TIME_PERIOD="2010-03-22" OBS_VALUE="-1.5854" BBK_DIFF_A="0.03786"/>
      <bbk:Obs TIME_PERIOD="2010-03-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-03-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-03-19" OBS_VALUE="-1.62326" BBK_DIFF_A="-0.03979"/>
      <bbk:Obs TIME_PERIOD="2010-03-18" OBS_VALUE="-1.58347" BBK_DIFF_A="0.01669"/>
      <bbk:Obs TIME_PERIOD="2010-03-17" OBS_VALUE="-1.60016" BBK_DIFF_A="0.47931"/>
      <bbk:Obs TIME_PERIOD="2010-03-16" OBS_VALUE="-2.07947" BBK_DIFF_A="-0.13691"/>
      <bbk:Obs TIME_PERIOD="2010-03-15" OBS_VALUE="-1.94256" BBK_DIFF_A="-0.07835"/>
      <bbk:Obs TIME_PERIOD="2010-03-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-03-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-03-12" OBS_VALUE="-1.86421" BBK_DIFF_A="0.35138"/>
      <bbk:Obs TIME_PERIOD="2010-03-11" OBS_VALUE="-2.21559" BBK_DIFF_A="-0.57874"/>
      <bbk:Obs TIME_PERIOD="2010-03-10" OBS_VALUE="-1.63685" BBK_DIFF_A="-0.02848"/>
      <bbk:Obs TIME_PERIOD="2010-03-09" OBS_VALUE="-1.60837" BBK_DIFF_A="-0.03629"/>
      <bbk:Obs TIME_PERIOD="2010-03-08" OBS_VALUE="-1.57208" BBK_DIFF_A="0.00119"/>
      <bbk:Obs TIME_PERIOD="2010-03-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-03-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-03-05" OBS_VALUE="-1.57327" BBK_DIFF_A="0.02673"/>
      <bbk:Obs TIME_PERIOD="2010-03-04" OBS_VALUE="-1.6" BBK_DIFF_A="-0.0178"/>
      <bbk:Obs TIME_PERIOD="2010-03-03" OBS_VALUE="-1.5822" BBK_DIFF_A="-0.02063"/>
      <bbk:Obs TIME_PERIOD="2010-03-02" OBS_VALUE="-1.56157" BBK_DIFF_A="-0.00107"/>
      <bbk:Obs TIME_PERIOD="2010-03-01" OBS_VALUE="-1.5605" BBK_DIFF_A="0.01304"/>
      <bbk:Obs TIME_PERIOD="2010-02-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-02-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-02-26" OBS_VALUE="-1.57354" BBK_DIFF_A="-0.02909"/>
      <bbk:Obs TIME_PERIOD="2010-02-25" OBS_VALUE="-1.54445" BBK_DIFF_A="0.088"/>
      <bbk:Obs TIME_PERIOD="2010-02-24" OBS_VALUE="-1.63245" BBK_DIFF_A="0.08028"/>
      <bbk:Obs TIME_PERIOD="2010-02-23" OBS_VALUE="-1.71273" BBK_DIFF_A="0.03756"/>
      <bbk:Obs TIME_PERIOD="2010-02-22" OBS_VALUE="-1.75029" BBK_DIFF_A="-0.01556"/>
      <bbk:Obs TIME_PERIOD="2010-02-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-02-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-02-19" OBS_VALUE="-1.73473" BBK_DIFF_A="-0.00556"/>
      <bbk:Obs TIME_PERIOD="2010-02-18" OBS_VALUE="-1.72917" BBK_DIFF_A="-0.01826"/>
      <bbk:Obs TIME_PERIOD="2010-02-17" OBS_VALUE="-1.71091" BBK_DIFF_A="-0.03023"/>
      <bbk:Obs TIME_PERIOD="2010-02-16" OBS_VALUE="-1.68068" BBK_DIFF_A="0.0021"/>
      <bbk:Obs TIME_PERIOD="2010-02-15" OBS_VALUE="-1.68278" BBK_DIFF_A="0.04083"/>
      <bbk:Obs TIME_PERIOD="2010-02-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-02-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-02-12" OBS_VALUE="-1.72361" BBK_DIFF_A="-0.031"/>
      <bbk:Obs TIME_PERIOD="2010-02-11" OBS_VALUE="-1.69261" BBK_DIFF_A="0.10693"/>
      <bbk:Obs TIME_PERIOD="2010-02-10" OBS_VALUE="-1.79954" BBK_DIFF_A="-0.15051"/>
      <bbk:Obs TIME_PERIOD="2010-02-09" OBS_VALUE="-1.64903" BBK_DIFF_A="-0.05579"/>
      <bbk:Obs TIME_PERIOD="2010-02-08" OBS_VALUE="-1.59324" BBK_DIFF_A="0.20254"/>
      <bbk:Obs TIME_PERIOD="2010-02-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-02-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-02-05" OBS_VALUE="-1.79578" BBK_DIFF_A="0.03818"/>
      <bbk:Obs TIME_PERIOD="2010-02-04" OBS_VALUE="-1.83396" BBK_DIFF_A="-0.0139"/>
      <bbk:Obs TIME_PERIOD="2010-02-03" OBS_VALUE="-1.82006" BBK_DIFF_A="0.01497"/>
      <bbk:Obs TIME_PERIOD="2010-02-02" OBS_VALUE="-1.83503" BBK_DIFF_A="-0.01291"/>
      <bbk:Obs TIME_PERIOD="2010-02-01" OBS_VALUE="-1.82212" BBK_DIFF_A="0.0106"/>
      <bbk:Obs TIME_PERIOD="2010-01-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-01-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-01-29" OBS_VALUE="-1.83272" BBK_DIFF_A="0.05453"/>
      <bbk:Obs TIME_PERIOD="2010-01-28" OBS_VALUE="-1.88725" BBK_DIFF_A="0.04541"/>
      <bbk:Obs TIME_PERIOD="2010-01-27" OBS_VALUE="-1.93266" BBK_DIFF_A="-0.01493"/>
      <bbk:Obs TIME_PERIOD="2010-01-26" OBS_VALUE="-1.91773" BBK_DIFF_A="0.03082"/>
      <bbk:Obs TIME_PERIOD="2010-01-25" OBS_VALUE="-1.94855" BBK_DIFF_A="-0.00838"/>
      <bbk:Obs TIME_PERIOD="2010-01-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-01-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-01-22" OBS_VALUE="-1.94017" BBK_DIFF_A="0.01779"/>
      <bbk:Obs TIME_PERIOD="2010-01-21" OBS_VALUE="-1.95796" BBK_DIFF_A="0.03465"/>
      <bbk:Obs TIME_PERIOD="2010-01-20" OBS_VALUE="-1.99261" BBK_DIFF_A="0.02025"/>
      <bbk:Obs TIME_PERIOD="2010-01-19" OBS_VALUE="-2.01286" BBK_DIFF_A="-0.02938"/>
      <bbk:Obs TIME_PERIOD="2010-01-18" OBS_VALUE="-1.98348" BBK_DIFF_A="0.01611"/>
      <bbk:Obs TIME_PERIOD="2010-01-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-01-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-01-15" OBS_VALUE="-1.99959" BBK_DIFF_A="0.01898"/>
      <bbk:Obs TIME_PERIOD="2010-01-14" OBS_VALUE="-2.01857" BBK_DIFF_A="0.02888"/>
      <bbk:Obs TIME_PERIOD="2010-01-13" OBS_VALUE="-2.04745" BBK_DIFF_A="-0.02312"/>
      <bbk:Obs TIME_PERIOD="2010-01-12" OBS_VALUE="-2.02433" BBK_DIFF_A="0.0572"/>
      <bbk:Obs TIME_PERIOD="2010-01-11" OBS_VALUE="-2.08153" BBK_DIFF_A="0.01172"/>
      <bbk:Obs TIME_PERIOD="2010-01-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-01-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-01-08" OBS_VALUE="-2.09325" BBK_DIFF_A="-0.00358"/>
      <bbk:Obs TIME_PERIOD="2010-01-07" OBS_VALUE="-2.08967" BBK_DIFF_A="-0.09499"/>
      <bbk:Obs TIME_PERIOD="2010-01-06" OBS_VALUE="-1.99468" BBK_DIFF_A="0.02729"/>
      <bbk:Obs TIME_PERIOD="2010-01-05" OBS_VALUE="-2.02197" BBK_DIFF_A="0.04653"/>
      <bbk:Obs TIME_PERIOD="2010-01-04" OBS_VALUE="-2.0685" BBK_DIFF_A="-0.04436"/>
      <bbk:Obs TIME_PERIOD="2010-01-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-01-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2010-01-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-12-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-12-30" OBS_VALUE="-2.02414" BBK_DIFF_A="0.11167"/>
      <bbk:Obs TIME_PERIOD="2009-12-29" OBS_VALUE="-2.13581" BBK_DIFF_A="-0.21638"/>
      <bbk:Obs TIME_PERIOD="2009-12-28" OBS_VALUE="-1.91943" BBK_DIFF_A="-0.03658"/>
      <bbk:Obs TIME_PERIOD="2009-12-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-12-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-12-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-12-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-12-23" OBS_VALUE="-1.88285" BBK_DIFF_A="-0.03089"/>
      <bbk:Obs TIME_PERIOD="2009-12-22" OBS_VALUE="-1.85196" BBK_DIFF_A="-0.13369"/>
      <bbk:Obs TIME_PERIOD="2009-12-21" OBS_VALUE="-1.71827" BBK_DIFF_A="-0.01657"/>
      <bbk:Obs TIME_PERIOD="2009-12-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-12-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-12-18" OBS_VALUE="-1.7017" BBK_DIFF_A="0.07084"/>
      <bbk:Obs TIME_PERIOD="2009-12-17" OBS_VALUE="-1.77254" BBK_DIFF_A="0.03803"/>
      <bbk:Obs TIME_PERIOD="2009-12-16" OBS_VALUE="-1.81057" BBK_DIFF_A="-0.01948"/>
      <bbk:Obs TIME_PERIOD="2009-12-15" OBS_VALUE="-1.79109" BBK_DIFF_A="0.03133"/>
      <bbk:Obs TIME_PERIOD="2009-12-14" OBS_VALUE="-1.82242" BBK_DIFF_A="0.04651"/>
      <bbk:Obs TIME_PERIOD="2009-12-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-12-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-12-11" OBS_VALUE="-1.86893" BBK_DIFF_A="-0.05993"/>
      <bbk:Obs TIME_PERIOD="2009-12-10" OBS_VALUE="-1.809" BBK_DIFF_A="-0.03085"/>
      <bbk:Obs TIME_PERIOD="2009-12-09" OBS_VALUE="-1.77815" BBK_DIFF_A="0.01903"/>
      <bbk:Obs TIME_PERIOD="2009-12-08" OBS_VALUE="-1.79718" BBK_DIFF_A="0.07273"/>
      <bbk:Obs TIME_PERIOD="2009-12-07" OBS_VALUE="-1.86991" BBK_DIFF_A="-0.09928"/>
      <bbk:Obs TIME_PERIOD="2009-12-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-12-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-12-04" OBS_VALUE="-1.77063" BBK_DIFF_A="0.04618"/>
      <bbk:Obs TIME_PERIOD="2009-12-03" OBS_VALUE="-1.81681" BBK_DIFF_A="-0.10111"/>
      <bbk:Obs TIME_PERIOD="2009-12-02" OBS_VALUE="-1.7157" BBK_DIFF_A="-0.00933"/>
      <bbk:Obs TIME_PERIOD="2009-12-01" OBS_VALUE="-1.70637" BBK_DIFF_A="-0.002"/>
      <bbk:Obs TIME_PERIOD="2009-11-30" OBS_VALUE="-1.70437" BBK_DIFF_A="-0.23741"/>
      <bbk:Obs TIME_PERIOD="2009-11-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-11-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-11-27" OBS_VALUE="-1.46696" BBK_DIFF_A="-0.01951"/>
      <bbk:Obs TIME_PERIOD="2009-11-26" OBS_VALUE="-1.44745" BBK_DIFF_A="-0.11159"/>
      <bbk:Obs TIME_PERIOD="2009-11-25" OBS_VALUE="-1.33586" BBK_DIFF_A="-0.01373"/>
      <bbk:Obs TIME_PERIOD="2009-11-24" OBS_VALUE="-1.32213" BBK_DIFF_A="-0.05298"/>
      <bbk:Obs TIME_PERIOD="2009-11-23" OBS_VALUE="-1.26915" BBK_DIFF_A="0.06487"/>
      <bbk:Obs TIME_PERIOD="2009-11-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-11-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-11-20" OBS_VALUE="-1.33402" BBK_DIFF_A="-0.0226"/>
      <bbk:Obs TIME_PERIOD="2009-11-19" OBS_VALUE="-1.31142" BBK_DIFF_A="0.01442"/>
      <bbk:Obs TIME_PERIOD="2009-11-18" OBS_VALUE="-1.32584" BBK_DIFF_A="0.06172"/>
      <bbk:Obs TIME_PERIOD="2009-11-17" OBS_VALUE="-1.38756" BBK_DIFF_A="0.0262"/>
      <bbk:Obs TIME_PERIOD="2009-11-16" OBS_VALUE="-1.41376" BBK_DIFF_A="-0.03926"/>
      <bbk:Obs TIME_PERIOD="2009-11-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-11-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-11-13" OBS_VALUE="-1.3745" BBK_DIFF_A="-0.05155"/>
      <bbk:Obs TIME_PERIOD="2009-11-12" OBS_VALUE="-1.32295" BBK_DIFF_A="0.62549"/>
      <bbk:Obs TIME_PERIOD="2009-11-11" OBS_VALUE="-1.94844" BBK_DIFF_A="-0.03607"/>
      <bbk:Obs TIME_PERIOD="2009-11-10" OBS_VALUE="-1.91237" BBK_DIFF_A="0.05316"/>
      <bbk:Obs TIME_PERIOD="2009-11-09" OBS_VALUE="-1.96553" BBK_DIFF_A="0.02444"/>
      <bbk:Obs TIME_PERIOD="2009-11-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-11-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-11-06" OBS_VALUE="-1.98997" BBK_DIFF_A="0.00636"/>
      <bbk:Obs TIME_PERIOD="2009-11-05" OBS_VALUE="-1.99633" BBK_DIFF_A="-0.05179"/>
      <bbk:Obs TIME_PERIOD="2009-11-04" OBS_VALUE="-1.94454" BBK_DIFF_A="-0.13079"/>
      <bbk:Obs TIME_PERIOD="2009-11-03" OBS_VALUE="-1.81375" BBK_DIFF_A="0.06341"/>
      <bbk:Obs TIME_PERIOD="2009-11-02" OBS_VALUE="-1.87716" BBK_DIFF_A="0.04085"/>
      <bbk:Obs TIME_PERIOD="2009-11-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-10-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-10-30" OBS_VALUE="-1.91801" BBK_DIFF_A="0.04065"/>
      <bbk:Obs TIME_PERIOD="2009-10-29" OBS_VALUE="-1.95866" BBK_DIFF_A="0.00469"/>
      <bbk:Obs TIME_PERIOD="2009-10-28" OBS_VALUE="-1.96335" BBK_DIFF_A="0.07206"/>
      <bbk:Obs TIME_PERIOD="2009-10-27" OBS_VALUE="-2.03541" BBK_DIFF_A="0.02094"/>
      <bbk:Obs TIME_PERIOD="2009-10-26" OBS_VALUE="-2.05635" BBK_DIFF_A="-0.05058"/>
      <bbk:Obs TIME_PERIOD="2009-10-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-10-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-10-23" OBS_VALUE="-2.00577" BBK_DIFF_A="-0.05336"/>
      <bbk:Obs TIME_PERIOD="2009-10-22" OBS_VALUE="-1.95241" BBK_DIFF_A="-0.02114"/>
      <bbk:Obs TIME_PERIOD="2009-10-21" OBS_VALUE="-1.93127" BBK_DIFF_A="0.01807"/>
      <bbk:Obs TIME_PERIOD="2009-10-20" OBS_VALUE="-1.94934" BBK_DIFF_A="0.0662"/>
      <bbk:Obs TIME_PERIOD="2009-10-19" OBS_VALUE="-2.01554" BBK_DIFF_A="-0.02299"/>
      <bbk:Obs TIME_PERIOD="2009-10-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-10-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-10-16" OBS_VALUE="-1.99255" BBK_DIFF_A="-0.04932"/>
      <bbk:Obs TIME_PERIOD="2009-10-15" OBS_VALUE="-1.94323" BBK_DIFF_A="-0.03537"/>
      <bbk:Obs TIME_PERIOD="2009-10-14" OBS_VALUE="-1.90786" BBK_DIFF_A="-0.07672"/>
      <bbk:Obs TIME_PERIOD="2009-10-13" OBS_VALUE="-1.83114" BBK_DIFF_A="0.02651"/>
      <bbk:Obs TIME_PERIOD="2009-10-12" OBS_VALUE="-1.85765" BBK_DIFF_A="-0.11147"/>
      <bbk:Obs TIME_PERIOD="2009-10-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-10-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-10-09" OBS_VALUE="-1.74618" BBK_DIFF_A="-0.01162"/>
      <bbk:Obs TIME_PERIOD="2009-10-08" OBS_VALUE="-1.73456" BBK_DIFF_A="0.07216"/>
      <bbk:Obs TIME_PERIOD="2009-10-07" OBS_VALUE="-1.80672" BBK_DIFF_A="0.0556"/>
      <bbk:Obs TIME_PERIOD="2009-10-06" OBS_VALUE="-1.86232" BBK_DIFF_A="-0.01934"/>
      <bbk:Obs TIME_PERIOD="2009-10-05" OBS_VALUE="-1.84298" BBK_DIFF_A="-0.03266"/>
      <bbk:Obs TIME_PERIOD="2009-10-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-10-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-10-02" OBS_VALUE="-1.81032" BBK_DIFF_A="-0.06581"/>
      <bbk:Obs TIME_PERIOD="2009-10-01" OBS_VALUE="-1.74451" BBK_DIFF_A="-0.03221"/>
      <bbk:Obs TIME_PERIOD="2009-09-30" OBS_VALUE="-1.7123" BBK_DIFF_A="0.03976"/>
      <bbk:Obs TIME_PERIOD="2009-09-29" OBS_VALUE="-1.75206" BBK_DIFF_A="-0.03114"/>
      <bbk:Obs TIME_PERIOD="2009-09-28" OBS_VALUE="-1.72092" BBK_DIFF_A="0.05922"/>
      <bbk:Obs TIME_PERIOD="2009-09-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-09-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-09-25" OBS_VALUE="-1.78014" BBK_DIFF_A="0.02935"/>
      <bbk:Obs TIME_PERIOD="2009-09-24" OBS_VALUE="-1.80949" BBK_DIFF_A="0.03007"/>
      <bbk:Obs TIME_PERIOD="2009-09-23" OBS_VALUE="-1.83956" BBK_DIFF_A="0.08241"/>
      <bbk:Obs TIME_PERIOD="2009-09-22" OBS_VALUE="-1.92197" BBK_DIFF_A="-0.00627"/>
      <bbk:Obs TIME_PERIOD="2009-09-21" OBS_VALUE="-1.9157" BBK_DIFF_A="-0.12435"/>
      <bbk:Obs TIME_PERIOD="2009-09-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-09-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-09-18" OBS_VALUE="-1.79135" BBK_DIFF_A="-0.01036"/>
      <bbk:Obs TIME_PERIOD="2009-09-17" OBS_VALUE="-1.78099" BBK_DIFF_A="-0.04747"/>
      <bbk:Obs TIME_PERIOD="2009-09-16" OBS_VALUE="-1.73352" BBK_DIFF_A="0.083"/>
      <bbk:Obs TIME_PERIOD="2009-09-15" OBS_VALUE="-1.81652" BBK_DIFF_A="-0.06726"/>
      <bbk:Obs TIME_PERIOD="2009-09-14" OBS_VALUE="-1.74926" BBK_DIFF_A="0.09353"/>
      <bbk:Obs TIME_PERIOD="2009-09-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-09-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-09-11" OBS_VALUE="-1.84279" BBK_DIFF_A="0.04845"/>
      <bbk:Obs TIME_PERIOD="2009-09-10" OBS_VALUE="-1.89124" BBK_DIFF_A="-0.11754"/>
      <bbk:Obs TIME_PERIOD="2009-09-09" OBS_VALUE="-1.7737" BBK_DIFF_A="-0.06745"/>
      <bbk:Obs TIME_PERIOD="2009-09-08" OBS_VALUE="-1.70625" BBK_DIFF_A="0.00225"/>
      <bbk:Obs TIME_PERIOD="2009-09-07" OBS_VALUE="-1.7085" BBK_DIFF_A="-0.05799"/>
      <bbk:Obs TIME_PERIOD="2009-09-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-09-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-09-04" OBS_VALUE="-1.65051" BBK_DIFF_A="0.04032"/>
      <bbk:Obs TIME_PERIOD="2009-09-03" OBS_VALUE="-1.69083" BBK_DIFF_A="-0.17596"/>
      <bbk:Obs TIME_PERIOD="2009-09-02" OBS_VALUE="-1.51487" BBK_DIFF_A="0.10717"/>
      <bbk:Obs TIME_PERIOD="2009-09-01" OBS_VALUE="-1.62204" BBK_DIFF_A="-0.00704"/>
      <bbk:Obs TIME_PERIOD="2009-08-31" OBS_VALUE="-1.615" BBK_DIFF_A="0.0369"/>
      <bbk:Obs TIME_PERIOD="2009-08-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-08-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-08-28" OBS_VALUE="-1.6519" BBK_DIFF_A="-0.07215"/>
      <bbk:Obs TIME_PERIOD="2009-08-27" OBS_VALUE="-1.57975" BBK_DIFF_A="0.04497"/>
      <bbk:Obs TIME_PERIOD="2009-08-26" OBS_VALUE="-1.62472" BBK_DIFF_A="-0.01897"/>
      <bbk:Obs TIME_PERIOD="2009-08-25" OBS_VALUE="-1.60575" BBK_DIFF_A="-0.04003"/>
      <bbk:Obs TIME_PERIOD="2009-08-24" OBS_VALUE="-1.56572" BBK_DIFF_A="-0.00113"/>
      <bbk:Obs TIME_PERIOD="2009-08-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-08-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-08-21" OBS_VALUE="-1.56459" BBK_DIFF_A="0.00479"/>
      <bbk:Obs TIME_PERIOD="2009-08-20" OBS_VALUE="-1.56938" BBK_DIFF_A="0.00719"/>
      <bbk:Obs TIME_PERIOD="2009-08-19" OBS_VALUE="-1.57657" BBK_DIFF_A="0.06081"/>
      <bbk:Obs TIME_PERIOD="2009-08-18" OBS_VALUE="-1.63738" BBK_DIFF_A="-0.75498"/>
      <bbk:Obs TIME_PERIOD="2009-08-17" OBS_VALUE="-0.8824" BBK_DIFF_A="-0.01844"/>
      <bbk:Obs TIME_PERIOD="2009-08-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-08-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-08-14" OBS_VALUE="-0.86396" BBK_DIFF_A="-0.10188"/>
      <bbk:Obs TIME_PERIOD="2009-08-13" OBS_VALUE="-0.76208" BBK_DIFF_A="0.02823"/>
      <bbk:Obs TIME_PERIOD="2009-08-12" OBS_VALUE="-0.79031" BBK_DIFF_A="-0.11526"/>
      <bbk:Obs TIME_PERIOD="2009-08-11" OBS_VALUE="-0.67505" BBK_DIFF_A="-0.01614"/>
      <bbk:Obs TIME_PERIOD="2009-08-10" OBS_VALUE="-0.65891" BBK_DIFF_A="0.04045"/>
      <bbk:Obs TIME_PERIOD="2009-08-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-08-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-08-07" OBS_VALUE="-0.69936" BBK_DIFF_A="-0.00644"/>
      <bbk:Obs TIME_PERIOD="2009-08-06" OBS_VALUE="-0.69292" BBK_DIFF_A="0.0971"/>
      <bbk:Obs TIME_PERIOD="2009-08-05" OBS_VALUE="-0.79002" BBK_DIFF_A="0.07177"/>
      <bbk:Obs TIME_PERIOD="2009-08-04" OBS_VALUE="-0.86179" BBK_DIFF_A="0.1908"/>
      <bbk:Obs TIME_PERIOD="2009-08-03" OBS_VALUE="-1.05259" BBK_DIFF_A="-0.01517"/>
      <bbk:Obs TIME_PERIOD="2009-08-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-08-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-07-31" OBS_VALUE="-1.03742" BBK_DIFF_A="0.083"/>
      <bbk:Obs TIME_PERIOD="2009-07-30" OBS_VALUE="-1.12042" BBK_DIFF_A="-0.02515"/>
      <bbk:Obs TIME_PERIOD="2009-07-29" OBS_VALUE="-1.09527" BBK_DIFF_A="0.15271"/>
      <bbk:Obs TIME_PERIOD="2009-07-28" OBS_VALUE="-1.24798" BBK_DIFF_A="0.03178"/>
      <bbk:Obs TIME_PERIOD="2009-07-27" OBS_VALUE="-1.27976" BBK_DIFF_A="0.04926"/>
      <bbk:Obs TIME_PERIOD="2009-07-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-07-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-07-24" OBS_VALUE="-1.32902" BBK_DIFF_A="0.01429"/>
      <bbk:Obs TIME_PERIOD="2009-07-23" OBS_VALUE="-1.34331" BBK_DIFF_A="-0.0082"/>
      <bbk:Obs TIME_PERIOD="2009-07-22" OBS_VALUE="-1.33511" BBK_DIFF_A="-0.01349"/>
      <bbk:Obs TIME_PERIOD="2009-07-21" OBS_VALUE="-1.32162" BBK_DIFF_A="-0.00738"/>
      <bbk:Obs TIME_PERIOD="2009-07-20" OBS_VALUE="-1.31424" BBK_DIFF_A="0.04388"/>
      <bbk:Obs TIME_PERIOD="2009-07-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-07-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-07-17" OBS_VALUE="-1.35812" BBK_DIFF_A="-0.02208"/>
      <bbk:Obs TIME_PERIOD="2009-07-16" OBS_VALUE="-1.33604" BBK_DIFF_A="-0.0186"/>
      <bbk:Obs TIME_PERIOD="2009-07-15" OBS_VALUE="-1.31744" BBK_DIFF_A="-0.02536"/>
      <bbk:Obs TIME_PERIOD="2009-07-14" OBS_VALUE="-1.29208" BBK_DIFF_A="0.09542"/>
      <bbk:Obs TIME_PERIOD="2009-07-13" OBS_VALUE="-1.3875" BBK_DIFF_A="0.00828"/>
      <bbk:Obs TIME_PERIOD="2009-07-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-07-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-07-10" OBS_VALUE="-1.39578" BBK_DIFF_A="0.04317"/>
      <bbk:Obs TIME_PERIOD="2009-07-09" OBS_VALUE="-1.43895" BBK_DIFF_A="-0.0027"/>
      <bbk:Obs TIME_PERIOD="2009-07-08" OBS_VALUE="-1.43625" BBK_DIFF_A="0.06246"/>
      <bbk:Obs TIME_PERIOD="2009-07-07" OBS_VALUE="-1.49871" BBK_DIFF_A="0.0559"/>
      <bbk:Obs TIME_PERIOD="2009-07-06" OBS_VALUE="-1.55461" BBK_DIFF_A="-0.01606"/>
      <bbk:Obs TIME_PERIOD="2009-07-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-07-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-07-03" OBS_VALUE="-1.53855" BBK_DIFF_A="-0.00388"/>
      <bbk:Obs TIME_PERIOD="2009-07-02" OBS_VALUE="-1.53467" BBK_DIFF_A="-0.04748"/>
      <bbk:Obs TIME_PERIOD="2009-07-01" OBS_VALUE="-1.48719" BBK_DIFF_A="0.03456"/>
      <bbk:Obs TIME_PERIOD="2009-06-30" OBS_VALUE="-1.52175" BBK_DIFF_A="-0.05349"/>
      <bbk:Obs TIME_PERIOD="2009-06-29" OBS_VALUE="-1.46826" BBK_DIFF_A="0.01763"/>
      <bbk:Obs TIME_PERIOD="2009-06-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-06-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-06-26" OBS_VALUE="-1.48589" BBK_DIFF_A="-0.00637"/>
      <bbk:Obs TIME_PERIOD="2009-06-25" OBS_VALUE="-1.47952" BBK_DIFF_A="-0.22603"/>
      <bbk:Obs TIME_PERIOD="2009-06-24" OBS_VALUE="-1.25349" BBK_DIFF_A="0.0299"/>
      <bbk:Obs TIME_PERIOD="2009-06-23" OBS_VALUE="-1.28339" BBK_DIFF_A="-0.01056"/>
      <bbk:Obs TIME_PERIOD="2009-06-22" OBS_VALUE="-1.27283" BBK_DIFF_A="0.06176"/>
      <bbk:Obs TIME_PERIOD="2009-06-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-06-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-06-19" OBS_VALUE="-1.33459" BBK_DIFF_A="-0.11934"/>
      <bbk:Obs TIME_PERIOD="2009-06-18" OBS_VALUE="-1.21525" BBK_DIFF_A="-0.0667"/>
      <bbk:Obs TIME_PERIOD="2009-06-17" OBS_VALUE="-1.14855" BBK_DIFF_A="-0.09915"/>
      <bbk:Obs TIME_PERIOD="2009-06-16" OBS_VALUE="-1.0494" BBK_DIFF_A="-0.04637"/>
      <bbk:Obs TIME_PERIOD="2009-06-15" OBS_VALUE="-1.00303" BBK_DIFF_A="-0.07163"/>
      <bbk:Obs TIME_PERIOD="2009-06-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-06-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-06-12" OBS_VALUE="-0.9314" BBK_DIFF_A="0.13791"/>
      <bbk:Obs TIME_PERIOD="2009-06-11" OBS_VALUE="-1.06931" BBK_DIFF_A="-0.01726"/>
      <bbk:Obs TIME_PERIOD="2009-06-10" OBS_VALUE="-1.05205" BBK_DIFF_A="0.26612"/>
      <bbk:Obs TIME_PERIOD="2009-06-09" OBS_VALUE="-1.31817" BBK_DIFF_A="0.04917"/>
      <bbk:Obs TIME_PERIOD="2009-06-08" OBS_VALUE="-1.36734" BBK_DIFF_A="0.22564"/>
      <bbk:Obs TIME_PERIOD="2009-06-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-06-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-06-05" OBS_VALUE="-1.59298" BBK_DIFF_A="-0.04012"/>
      <bbk:Obs TIME_PERIOD="2009-06-04" OBS_VALUE="-1.55286" BBK_DIFF_A="-0.03433"/>
      <bbk:Obs TIME_PERIOD="2009-06-03" OBS_VALUE="-1.51853" BBK_DIFF_A="0.09994"/>
      <bbk:Obs TIME_PERIOD="2009-06-02" OBS_VALUE="-1.61847" BBK_DIFF_A="-0.14425"/>
      <bbk:Obs TIME_PERIOD="2009-06-01" OBS_VALUE="-1.47422" BBK_DIFF_A="-0.06259"/>
      <bbk:Obs TIME_PERIOD="2009-05-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-05-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-05-29" OBS_VALUE="-1.41163" BBK_DIFF_A="0.04982"/>
      <bbk:Obs TIME_PERIOD="2009-05-28" OBS_VALUE="-1.46145" BBK_DIFF_A="0.01381"/>
      <bbk:Obs TIME_PERIOD="2009-05-27" OBS_VALUE="-1.47526" BBK_DIFF_A="0.03333"/>
      <bbk:Obs TIME_PERIOD="2009-05-26" OBS_VALUE="-1.50859" BBK_DIFF_A="0.39661"/>
      <bbk:Obs TIME_PERIOD="2009-05-25" OBS_VALUE="-1.9052" BBK_DIFF_A="-0.02529"/>
      <bbk:Obs TIME_PERIOD="2009-05-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-05-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-05-22" OBS_VALUE="-1.87991" BBK_DIFF_A="-0.01325"/>
      <bbk:Obs TIME_PERIOD="2009-05-21" OBS_VALUE="-1.86666" BBK_DIFF_A="-0.05379"/>
      <bbk:Obs TIME_PERIOD="2009-05-20" OBS_VALUE="-1.81287" BBK_DIFF_A="0.10722"/>
      <bbk:Obs TIME_PERIOD="2009-05-19" OBS_VALUE="-1.92009" BBK_DIFF_A="-0.06183"/>
      <bbk:Obs TIME_PERIOD="2009-05-18" OBS_VALUE="-1.85826" BBK_DIFF_A="-0.03195"/>
      <bbk:Obs TIME_PERIOD="2009-05-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-05-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-05-15" OBS_VALUE="-1.82631" BBK_DIFF_A="0.00213"/>
      <bbk:Obs TIME_PERIOD="2009-05-14" OBS_VALUE="-1.82844" BBK_DIFF_A="-0.01476"/>
      <bbk:Obs TIME_PERIOD="2009-05-13" OBS_VALUE="-1.81368" BBK_DIFF_A="0.01578"/>
      <bbk:Obs TIME_PERIOD="2009-05-12" OBS_VALUE="-1.82946" BBK_DIFF_A="0.03839"/>
      <bbk:Obs TIME_PERIOD="2009-05-11" OBS_VALUE="-1.86785" BBK_DIFF_A="-0.00577"/>
      <bbk:Obs TIME_PERIOD="2009-05-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-05-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-05-08" OBS_VALUE="-1.86208" BBK_DIFF_A="-0.17061"/>
      <bbk:Obs TIME_PERIOD="2009-05-07" OBS_VALUE="-1.69147" BBK_DIFF_A="-0.15757"/>
      <bbk:Obs TIME_PERIOD="2009-05-06" OBS_VALUE="-1.5339" BBK_DIFF_A="-0.03334"/>
      <bbk:Obs TIME_PERIOD="2009-05-05" OBS_VALUE="-1.50056" BBK_DIFF_A="-0.02536"/>
      <bbk:Obs TIME_PERIOD="2009-05-04" OBS_VALUE="-1.4752" BBK_DIFF_A="-0.03617"/>
      <bbk:Obs TIME_PERIOD="2009-05-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-05-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-05-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-04-30" OBS_VALUE="-1.43903" BBK_DIFF_A="0.01564"/>
      <bbk:Obs TIME_PERIOD="2009-04-29" OBS_VALUE="-1.45467" BBK_DIFF_A="-0.08413"/>
      <bbk:Obs TIME_PERIOD="2009-04-28" OBS_VALUE="-1.37054" BBK_DIFF_A="0.02961"/>
      <bbk:Obs TIME_PERIOD="2009-04-27" OBS_VALUE="-1.40015" BBK_DIFF_A="0.00333"/>
      <bbk:Obs TIME_PERIOD="2009-04-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-04-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-04-24" OBS_VALUE="-1.40348" BBK_DIFF_A="-0.03405"/>
      <bbk:Obs TIME_PERIOD="2009-04-23" OBS_VALUE="-1.36943" BBK_DIFF_A="-0.07887"/>
      <bbk:Obs TIME_PERIOD="2009-04-22" OBS_VALUE="-1.29056" BBK_DIFF_A="0.0568"/>
      <bbk:Obs TIME_PERIOD="2009-04-21" OBS_VALUE="-1.34736" BBK_DIFF_A="0.0661"/>
      <bbk:Obs TIME_PERIOD="2009-04-20" OBS_VALUE="-1.41346" BBK_DIFF_A="0.01484"/>
      <bbk:Obs TIME_PERIOD="2009-04-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-04-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-04-17" OBS_VALUE="-1.4283" BBK_DIFF_A="0.08725"/>
      <bbk:Obs TIME_PERIOD="2009-04-16" OBS_VALUE="-1.51555" BBK_DIFF_A="-0.05946"/>
      <bbk:Obs TIME_PERIOD="2009-04-15" OBS_VALUE="-1.45609" BBK_DIFF_A="0.05775"/>
      <bbk:Obs TIME_PERIOD="2009-04-14" OBS_VALUE="-1.51384" BBK_DIFF_A="0.28176"/>
      <bbk:Obs TIME_PERIOD="2009-04-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-04-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-04-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-04-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-04-09" OBS_VALUE="-1.7956" BBK_DIFF_A="-0.01631"/>
      <bbk:Obs TIME_PERIOD="2009-04-08" OBS_VALUE="-1.77929" BBK_DIFF_A="0.04692"/>
      <bbk:Obs TIME_PERIOD="2009-04-07" OBS_VALUE="-1.82621" BBK_DIFF_A="0.06265"/>
      <bbk:Obs TIME_PERIOD="2009-04-06" OBS_VALUE="-1.88886" BBK_DIFF_A="-0.48281"/>
      <bbk:Obs TIME_PERIOD="2009-04-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-04-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-04-03" OBS_VALUE="-1.40605" BBK_DIFF_A="0.02938"/>
      <bbk:Obs TIME_PERIOD="2009-04-02" OBS_VALUE="-1.43543" BBK_DIFF_A="-0.08459"/>
      <bbk:Obs TIME_PERIOD="2009-04-01" OBS_VALUE="-1.35084" BBK_DIFF_A="-0.00332"/>
      <bbk:Obs TIME_PERIOD="2009-03-31" OBS_VALUE="-1.34752" BBK_DIFF_A="0.0169"/>
      <bbk:Obs TIME_PERIOD="2009-03-30" OBS_VALUE="-1.36442" BBK_DIFF_A="0.06486"/>
      <bbk:Obs TIME_PERIOD="2009-03-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-03-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-03-27" OBS_VALUE="-1.42928" BBK_DIFF_A="0.07159"/>
      <bbk:Obs TIME_PERIOD="2009-03-26" OBS_VALUE="-1.50087" BBK_DIFF_A="-0.07152"/>
      <bbk:Obs TIME_PERIOD="2009-03-25" OBS_VALUE="-1.42935" BBK_DIFF_A="0.03369"/>
      <bbk:Obs TIME_PERIOD="2009-03-24" OBS_VALUE="-1.46304" BBK_DIFF_A="-0.10848"/>
      <bbk:Obs TIME_PERIOD="2009-03-23" OBS_VALUE="-1.35456" BBK_DIFF_A="0.0496"/>
      <bbk:Obs TIME_PERIOD="2009-03-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-03-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-03-20" OBS_VALUE="-1.40416" BBK_DIFF_A="0.02983"/>
      <bbk:Obs TIME_PERIOD="2009-03-19" OBS_VALUE="-1.43399" BBK_DIFF_A="0.09287"/>
      <bbk:Obs TIME_PERIOD="2009-03-18" OBS_VALUE="-1.52686" BBK_DIFF_A="-0.08269"/>
      <bbk:Obs TIME_PERIOD="2009-03-17" OBS_VALUE="-1.44417" BBK_DIFF_A="-0.0487"/>
      <bbk:Obs TIME_PERIOD="2009-03-16" OBS_VALUE="-1.39547" BBK_DIFF_A="-0.06765"/>
      <bbk:Obs TIME_PERIOD="2009-03-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-03-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-03-13" OBS_VALUE="-1.32782" BBK_DIFF_A="-0.16455"/>
      <bbk:Obs TIME_PERIOD="2009-03-12" OBS_VALUE="-1.16327" BBK_DIFF_A="-0.03097"/>
      <bbk:Obs TIME_PERIOD="2009-03-11" OBS_VALUE="-1.1323" BBK_DIFF_A="-0.08867"/>
      <bbk:Obs TIME_PERIOD="2009-03-10" OBS_VALUE="-1.04363" BBK_DIFF_A="-0.04074"/>
      <bbk:Obs TIME_PERIOD="2009-03-09" OBS_VALUE="-1.00289" BBK_DIFF_A="0.06026"/>
      <bbk:Obs TIME_PERIOD="2009-03-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-03-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-03-06" OBS_VALUE="-1.06315" BBK_DIFF_A="0.19121"/>
      <bbk:Obs TIME_PERIOD="2009-03-05" OBS_VALUE="-1.25436" BBK_DIFF_A="-0.17875"/>
      <bbk:Obs TIME_PERIOD="2009-03-04" OBS_VALUE="-1.07561" BBK_DIFF_A="-0.05395"/>
      <bbk:Obs TIME_PERIOD="2009-03-03" OBS_VALUE="-1.02166" BBK_DIFF_A="-0.08232"/>
      <bbk:Obs TIME_PERIOD="2009-03-02" OBS_VALUE="-0.93934" BBK_DIFF_A="0.05528"/>
      <bbk:Obs TIME_PERIOD="2009-03-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-02-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-02-27" OBS_VALUE="-0.99462" BBK_DIFF_A="-0.07119"/>
      <bbk:Obs TIME_PERIOD="2009-02-26" OBS_VALUE="-0.92343" BBK_DIFF_A="-0.06359"/>
      <bbk:Obs TIME_PERIOD="2009-02-25" OBS_VALUE="-0.85984" BBK_DIFF_A="0.01819"/>
      <bbk:Obs TIME_PERIOD="2009-02-24" OBS_VALUE="-0.87803" BBK_DIFF_A="0.05769"/>
      <bbk:Obs TIME_PERIOD="2009-02-23" OBS_VALUE="-0.93572" BBK_DIFF_A="-0.04668"/>
      <bbk:Obs TIME_PERIOD="2009-02-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-02-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-02-20" OBS_VALUE="-0.88904" BBK_DIFF_A="0.01187"/>
      <bbk:Obs TIME_PERIOD="2009-02-19" OBS_VALUE="-0.90091" BBK_DIFF_A="-0.24206"/>
      <bbk:Obs TIME_PERIOD="2009-02-18" OBS_VALUE="-0.65885" BBK_DIFF_A="0.10948"/>
      <bbk:Obs TIME_PERIOD="2009-02-17" OBS_VALUE="-0.76833" BBK_DIFF_A="0.03901"/>
      <bbk:Obs TIME_PERIOD="2009-02-16" OBS_VALUE="-0.80734" BBK_DIFF_A="0.11903"/>
      <bbk:Obs TIME_PERIOD="2009-02-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-02-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-02-13" OBS_VALUE="-0.92637" BBK_DIFF_A="-0.02796"/>
      <bbk:Obs TIME_PERIOD="2009-02-12" OBS_VALUE="-0.89841" BBK_DIFF_A="0.08428"/>
      <bbk:Obs TIME_PERIOD="2009-02-11" OBS_VALUE="-0.98269" BBK_DIFF_A="0.13346"/>
      <bbk:Obs TIME_PERIOD="2009-02-10" OBS_VALUE="-1.11615" BBK_DIFF_A="0.0341"/>
      <bbk:Obs TIME_PERIOD="2009-02-09" OBS_VALUE="-1.15025" BBK_DIFF_A="-0.08032"/>
      <bbk:Obs TIME_PERIOD="2009-02-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-02-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-02-06" OBS_VALUE="-1.06993" BBK_DIFF_A="0.03879"/>
      <bbk:Obs TIME_PERIOD="2009-02-05" OBS_VALUE="-1.10872" BBK_DIFF_A="-0.06293"/>
      <bbk:Obs TIME_PERIOD="2009-02-04" OBS_VALUE="-1.04579" BBK_DIFF_A="-0.07957"/>
      <bbk:Obs TIME_PERIOD="2009-02-03" OBS_VALUE="-0.96622" BBK_DIFF_A="0.04491"/>
      <bbk:Obs TIME_PERIOD="2009-02-02" OBS_VALUE="-1.01113" BBK_DIFF_A="-0.00888"/>
      <bbk:Obs TIME_PERIOD="2009-02-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-01-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-01-30" OBS_VALUE="-1.00225" BBK_DIFF_A="0.02181"/>
      <bbk:Obs TIME_PERIOD="2009-01-29" OBS_VALUE="-1.02406" BBK_DIFF_A="0.04199"/>
      <bbk:Obs TIME_PERIOD="2009-01-28" OBS_VALUE="-1.06605" BBK_DIFF_A="0.07914"/>
      <bbk:Obs TIME_PERIOD="2009-01-27" OBS_VALUE="-1.14519" BBK_DIFF_A="0.12592"/>
      <bbk:Obs TIME_PERIOD="2009-01-26" OBS_VALUE="-1.27111" BBK_DIFF_A="-0.19714"/>
      <bbk:Obs TIME_PERIOD="2009-01-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-01-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-01-23" OBS_VALUE="-1.07397" BBK_DIFF_A="-0.1558"/>
      <bbk:Obs TIME_PERIOD="2009-01-22" OBS_VALUE="-0.91817" BBK_DIFF_A="-0.11841"/>
      <bbk:Obs TIME_PERIOD="2009-01-21" OBS_VALUE="-0.79976" BBK_DIFF_A="-0.0359"/>
      <bbk:Obs TIME_PERIOD="2009-01-20" OBS_VALUE="-0.76386" BBK_DIFF_A="-0.02163"/>
      <bbk:Obs TIME_PERIOD="2009-01-19" OBS_VALUE="-0.74223" BBK_DIFF_A="-0.18053"/>
      <bbk:Obs TIME_PERIOD="2009-01-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-01-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-01-16" OBS_VALUE="-0.5617" BBK_DIFF_A="0.04036"/>
      <bbk:Obs TIME_PERIOD="2009-01-15" OBS_VALUE="-0.60206" BBK_DIFF_A="0.04355"/>
      <bbk:Obs TIME_PERIOD="2009-01-14" OBS_VALUE="-0.64561" BBK_DIFF_A="-0.05257"/>
      <bbk:Obs TIME_PERIOD="2009-01-13" OBS_VALUE="-0.59304" BBK_DIFF_A="-0.00584"/>
      <bbk:Obs TIME_PERIOD="2009-01-12" OBS_VALUE="-0.5872" BBK_DIFF_A="-0.0639"/>
      <bbk:Obs TIME_PERIOD="2009-01-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-01-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-01-09" OBS_VALUE="-0.5233" BBK_DIFF_A="0.05417"/>
      <bbk:Obs TIME_PERIOD="2009-01-08" OBS_VALUE="-0.57747" BBK_DIFF_A="-0.23593"/>
      <bbk:Obs TIME_PERIOD="2009-01-07" OBS_VALUE="-0.34154" BBK_DIFF_A="-0.17241"/>
      <bbk:Obs TIME_PERIOD="2009-01-06" OBS_VALUE="-0.16913" BBK_DIFF_A="-0.0836"/>
      <bbk:Obs TIME_PERIOD="2009-01-05" OBS_VALUE="-0.08553" BBK_DIFF_A="-0.02687"/>
      <bbk:Obs TIME_PERIOD="2009-01-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-01-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2009-01-02" OBS_VALUE="-0.05866" BBK_DIFF_A="0.07024"/>
      <bbk:Obs TIME_PERIOD="2009-01-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-12-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-12-30" OBS_VALUE="-0.1289" BBK_DIFF_A="1.6E-4"/>
      <bbk:Obs TIME_PERIOD="2008-12-29" OBS_VALUE="-0.12906" BBK_DIFF_A="-0.07172"/>
      <bbk:Obs TIME_PERIOD="2008-12-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-12-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-12-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-12-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-12-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-12-23" OBS_VALUE="-0.05734" BBK_DIFF_A="0.02646"/>
      <bbk:Obs TIME_PERIOD="2008-12-22" OBS_VALUE="-0.0838" BBK_DIFF_A="-0.13696"/>
      <bbk:Obs TIME_PERIOD="2008-12-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-12-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-12-19" OBS_VALUE="0.05316" BBK_DIFF_A="0.10628"/>
      <bbk:Obs TIME_PERIOD="2008-12-18" OBS_VALUE="-0.05312" BBK_DIFF_A="-0.11651"/>
      <bbk:Obs TIME_PERIOD="2008-12-17" OBS_VALUE="0.06339" BBK_DIFF_A="0.08442"/>
      <bbk:Obs TIME_PERIOD="2008-12-16" OBS_VALUE="-0.02103" BBK_DIFF_A="0.05571"/>
      <bbk:Obs TIME_PERIOD="2008-12-15" OBS_VALUE="-0.07674" BBK_DIFF_A="-0.17649"/>
      <bbk:Obs TIME_PERIOD="2008-12-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-12-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-12-12" OBS_VALUE="0.09975" BBK_DIFF_A="-0.00941"/>
      <bbk:Obs TIME_PERIOD="2008-12-11" OBS_VALUE="0.10916" BBK_DIFF_A="-0.17959"/>
      <bbk:Obs TIME_PERIOD="2008-12-10" OBS_VALUE="0.28875" BBK_DIFF_A="-0.04317"/>
      <bbk:Obs TIME_PERIOD="2008-12-09" OBS_VALUE="0.33192" BBK_DIFF_A="-0.0288"/>
      <bbk:Obs TIME_PERIOD="2008-12-08" OBS_VALUE="0.36072" BBK_DIFF_A="-0.05688"/>
      <bbk:Obs TIME_PERIOD="2008-12-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-12-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-12-05" OBS_VALUE="0.4176" BBK_DIFF_A="-0.10048"/>
      <bbk:Obs TIME_PERIOD="2008-12-04" OBS_VALUE="0.51808" BBK_DIFF_A="-0.00118"/>
      <bbk:Obs TIME_PERIOD="2008-12-03" OBS_VALUE="0.51926" BBK_DIFF_A="0.12756"/>
      <bbk:Obs TIME_PERIOD="2008-12-02" OBS_VALUE="0.3917" BBK_DIFF_A="0.18641"/>
      <bbk:Obs TIME_PERIOD="2008-12-01" OBS_VALUE="0.20529" BBK_DIFF_A="0.03871"/>
      <bbk:Obs TIME_PERIOD="2008-11-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-11-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-11-28" OBS_VALUE="0.16658" BBK_DIFF_A="0.08336"/>
      <bbk:Obs TIME_PERIOD="2008-11-27" OBS_VALUE="0.08322" BBK_DIFF_A="0.0566"/>
      <bbk:Obs TIME_PERIOD="2008-11-26" OBS_VALUE="0.02662" BBK_DIFF_A="0.24451"/>
      <bbk:Obs TIME_PERIOD="2008-11-25" OBS_VALUE="-0.21789" BBK_DIFF_A="0.06987"/>
      <bbk:Obs TIME_PERIOD="2008-11-24" OBS_VALUE="-0.28776" BBK_DIFF_A="-0.01824"/>
      <bbk:Obs TIME_PERIOD="2008-11-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-11-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-11-21" OBS_VALUE="-0.26952" BBK_DIFF_A="0.01775"/>
      <bbk:Obs TIME_PERIOD="2008-11-20" OBS_VALUE="-0.28727" BBK_DIFF_A="0.01226"/>
      <bbk:Obs TIME_PERIOD="2008-11-19" OBS_VALUE="-0.29953" BBK_DIFF_A="0.02535"/>
      <bbk:Obs TIME_PERIOD="2008-11-18" OBS_VALUE="-0.32488" BBK_DIFF_A="-0.05027"/>
      <bbk:Obs TIME_PERIOD="2008-11-17" OBS_VALUE="-0.27461" BBK_DIFF_A="0.01157"/>
      <bbk:Obs TIME_PERIOD="2008-11-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-11-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-11-14" OBS_VALUE="-0.28618" BBK_DIFF_A="-0.03814"/>
      <bbk:Obs TIME_PERIOD="2008-11-13" OBS_VALUE="-0.24804" BBK_DIFF_A="-0.0556"/>
      <bbk:Obs TIME_PERIOD="2008-11-12" OBS_VALUE="-0.19244" BBK_DIFF_A="-0.07973"/>
      <bbk:Obs TIME_PERIOD="2008-11-11" OBS_VALUE="-0.11271" BBK_DIFF_A="-0.13233"/>
      <bbk:Obs TIME_PERIOD="2008-11-10" OBS_VALUE="0.01962" BBK_DIFF_A="0.01969"/>
      <bbk:Obs TIME_PERIOD="2008-11-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-11-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-11-07" OBS_VALUE="-7.0E-5" BBK_DIFF_A="0.00116"/>
      <bbk:Obs TIME_PERIOD="2008-11-06" OBS_VALUE="-0.00123" BBK_DIFF_A="-0.06348"/>
      <bbk:Obs TIME_PERIOD="2008-11-05" OBS_VALUE="0.06225" BBK_DIFF_A="1.17192"/>
      <bbk:Obs TIME_PERIOD="2008-11-04" OBS_VALUE="-1.10967" BBK_DIFF_A="-0.05672"/>
      <bbk:Obs TIME_PERIOD="2008-11-03" OBS_VALUE="-1.05295" BBK_DIFF_A="0.00336"/>
      <bbk:Obs TIME_PERIOD="2008-11-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-11-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-10-31" OBS_VALUE="-1.05631" BBK_DIFF_A="-0.0726"/>
      <bbk:Obs TIME_PERIOD="2008-10-30" OBS_VALUE="-0.98371" BBK_DIFF_A="-0.27683"/>
      <bbk:Obs TIME_PERIOD="2008-10-29" OBS_VALUE="-0.70688" BBK_DIFF_A="-0.02145"/>
      <bbk:Obs TIME_PERIOD="2008-10-28" OBS_VALUE="-0.68543" BBK_DIFF_A="-0.08846"/>
      <bbk:Obs TIME_PERIOD="2008-10-27" OBS_VALUE="-0.59697" BBK_DIFF_A="0.19102"/>
      <bbk:Obs TIME_PERIOD="2008-10-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-10-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-10-24" OBS_VALUE="-0.78799" BBK_DIFF_A="-1.08139"/>
      <bbk:Obs TIME_PERIOD="2008-10-23" OBS_VALUE="0.2934" BBK_DIFF_A="0.2932"/>
      <bbk:Obs TIME_PERIOD="2008-10-22" OBS_VALUE="2.0E-4" BBK_DIFF_A="0.01102"/>
      <bbk:Obs TIME_PERIOD="2008-10-21" OBS_VALUE="-0.01082" BBK_DIFF_A="0.34036"/>
      <bbk:Obs TIME_PERIOD="2008-10-20" OBS_VALUE="-0.35118" BBK_DIFF_A="2.55789"/>
      <bbk:Obs TIME_PERIOD="2008-10-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-10-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-10-17" OBS_VALUE="-2.90907" BBK_DIFF_A="0.60584"/>
      <bbk:Obs TIME_PERIOD="2008-10-16" OBS_VALUE="-3.51491" BBK_DIFF_A="-0.25685"/>
      <bbk:Obs TIME_PERIOD="2008-10-15" OBS_VALUE="-3.25806" BBK_DIFF_A="1.7118"/>
      <bbk:Obs TIME_PERIOD="2008-10-14" OBS_VALUE="-4.96986" BBK_DIFF_A="0.99994"/>
      <bbk:Obs TIME_PERIOD="2008-10-13" OBS_VALUE="-5.9698" BBK_DIFF_A="-22.25828"/>
      <bbk:Obs TIME_PERIOD="2008-10-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-10-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-10-10" OBS_VALUE="16.28848" BBK_DIFF_A="-0.2196"/>
      <bbk:Obs TIME_PERIOD="2008-10-09" OBS_VALUE="16.50808" BBK_DIFF_A="20.85391"/>
      <bbk:Obs TIME_PERIOD="2008-10-08" OBS_VALUE="-4.34583" BBK_DIFF_A="0.13213"/>
      <bbk:Obs TIME_PERIOD="2008-10-07" OBS_VALUE="-4.47796" BBK_DIFF_A="-22.71482"/>
      <bbk:Obs TIME_PERIOD="2008-10-06" OBS_VALUE="18.23686" BBK_DIFF_A="21.8446"/>
      <bbk:Obs TIME_PERIOD="2008-10-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-10-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-10-03" OBS_VALUE="-3.60774" BBK_DIFF_A="0.16027"/>
      <bbk:Obs TIME_PERIOD="2008-10-02" OBS_VALUE="-3.76801" BBK_DIFF_A="10.14937"/>
      <bbk:Obs TIME_PERIOD="2008-10-01" OBS_VALUE="-13.91738" BBK_DIFF_A="-6.39013"/>
      <bbk:Obs TIME_PERIOD="2008-09-30" OBS_VALUE="-7.52725" BBK_DIFF_A="-4.13671"/>
      <bbk:Obs TIME_PERIOD="2008-09-29" OBS_VALUE="-3.39054" BBK_DIFF_A="-0.35138"/>
      <bbk:Obs TIME_PERIOD="2008-09-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-09-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-09-26" OBS_VALUE="-3.03916" BBK_DIFF_A="-0.09565"/>
      <bbk:Obs TIME_PERIOD="2008-09-25" OBS_VALUE="-2.94351" BBK_DIFF_A="-0.10507"/>
      <bbk:Obs TIME_PERIOD="2008-09-24" OBS_VALUE="-2.83844" BBK_DIFF_A="-0.06086"/>
      <bbk:Obs TIME_PERIOD="2008-09-23" OBS_VALUE="-2.77758" BBK_DIFF_A="-0.39711"/>
      <bbk:Obs TIME_PERIOD="2008-09-22" OBS_VALUE="-2.38047" BBK_DIFF_A="-3.96104"/>
      <bbk:Obs TIME_PERIOD="2008-09-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-09-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-09-19" OBS_VALUE="1.58057" BBK_DIFF_A="-0.0106"/>
      <bbk:Obs TIME_PERIOD="2008-09-18" OBS_VALUE="1.59117" BBK_DIFF_A="-0.26437"/>
      <bbk:Obs TIME_PERIOD="2008-09-17" OBS_VALUE="1.85554" BBK_DIFF_A="-0.05247"/>
      <bbk:Obs TIME_PERIOD="2008-09-16" OBS_VALUE="1.90801" BBK_DIFF_A="0.31316"/>
      <bbk:Obs TIME_PERIOD="2008-09-15" OBS_VALUE="1.59485" BBK_DIFF_A="-0.32613"/>
      <bbk:Obs TIME_PERIOD="2008-09-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-09-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-09-12" OBS_VALUE="1.92098" BBK_DIFF_A="-0.09001"/>
      <bbk:Obs TIME_PERIOD="2008-09-11" OBS_VALUE="2.01099" BBK_DIFF_A="-0.01638"/>
      <bbk:Obs TIME_PERIOD="2008-09-10" OBS_VALUE="2.02737" BBK_DIFF_A="0.04016"/>
      <bbk:Obs TIME_PERIOD="2008-09-09" OBS_VALUE="1.98721" BBK_DIFF_A="0.01541"/>
      <bbk:Obs TIME_PERIOD="2008-09-08" OBS_VALUE="1.9718" BBK_DIFF_A="-0.06761"/>
      <bbk:Obs TIME_PERIOD="2008-09-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-09-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-09-05" OBS_VALUE="2.03941" BBK_DIFF_A="0.08361"/>
      <bbk:Obs TIME_PERIOD="2008-09-04" OBS_VALUE="1.9558" BBK_DIFF_A="-0.01326"/>
      <bbk:Obs TIME_PERIOD="2008-09-03" OBS_VALUE="1.96906" BBK_DIFF_A="0.07404"/>
      <bbk:Obs TIME_PERIOD="2008-09-02" OBS_VALUE="1.89502" BBK_DIFF_A="-0.06704"/>
      <bbk:Obs TIME_PERIOD="2008-09-01" OBS_VALUE="1.96206" BBK_DIFF_A="-0.0084"/>
      <bbk:Obs TIME_PERIOD="2008-08-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-08-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-08-29" OBS_VALUE="1.97046" BBK_DIFF_A="0.03389"/>
      <bbk:Obs TIME_PERIOD="2008-08-28" OBS_VALUE="1.93657" BBK_DIFF_A="0.00865"/>
      <bbk:Obs TIME_PERIOD="2008-08-27" OBS_VALUE="1.92792" BBK_DIFF_A="-0.0302"/>
      <bbk:Obs TIME_PERIOD="2008-08-26" OBS_VALUE="1.95812" BBK_DIFF_A="0.04902"/>
      <bbk:Obs TIME_PERIOD="2008-08-25" OBS_VALUE="1.9091" BBK_DIFF_A="0.00734"/>
      <bbk:Obs TIME_PERIOD="2008-08-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-08-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-08-22" OBS_VALUE="1.90176" BBK_DIFF_A="-0.00976"/>
      <bbk:Obs TIME_PERIOD="2008-08-21" OBS_VALUE="1.91152" BBK_DIFF_A="-0.02107"/>
      <bbk:Obs TIME_PERIOD="2008-08-20" OBS_VALUE="1.93259" BBK_DIFF_A="-0.10767"/>
      <bbk:Obs TIME_PERIOD="2008-08-19" OBS_VALUE="2.04026" BBK_DIFF_A="0.01914"/>
      <bbk:Obs TIME_PERIOD="2008-08-18" OBS_VALUE="2.02112" BBK_DIFF_A="0.25443"/>
      <bbk:Obs TIME_PERIOD="2008-08-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-08-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-08-15" OBS_VALUE="1.76669" BBK_DIFF_A="0.03849"/>
      <bbk:Obs TIME_PERIOD="2008-08-14" OBS_VALUE="1.7282" BBK_DIFF_A="-0.19666"/>
      <bbk:Obs TIME_PERIOD="2008-08-13" OBS_VALUE="1.92486" BBK_DIFF_A="0.00668"/>
      <bbk:Obs TIME_PERIOD="2008-08-12" OBS_VALUE="1.91818" BBK_DIFF_A="0.03025"/>
      <bbk:Obs TIME_PERIOD="2008-08-11" OBS_VALUE="1.88793" BBK_DIFF_A="0.01514"/>
      <bbk:Obs TIME_PERIOD="2008-08-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-08-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-08-08" OBS_VALUE="1.87279" BBK_DIFF_A="-0.03335"/>
      <bbk:Obs TIME_PERIOD="2008-08-07" OBS_VALUE="1.90614" BBK_DIFF_A="-0.02748"/>
      <bbk:Obs TIME_PERIOD="2008-08-06" OBS_VALUE="1.93362" BBK_DIFF_A="0.01862"/>
      <bbk:Obs TIME_PERIOD="2008-08-05" OBS_VALUE="1.915" BBK_DIFF_A="-0.0179"/>
      <bbk:Obs TIME_PERIOD="2008-08-04" OBS_VALUE="1.9329" BBK_DIFF_A="0.03969"/>
      <bbk:Obs TIME_PERIOD="2008-08-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-08-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-08-01" OBS_VALUE="1.89321" BBK_DIFF_A="0.08879"/>
      <bbk:Obs TIME_PERIOD="2008-07-31" OBS_VALUE="1.80442" BBK_DIFF_A="-24.49047"/>
      <bbk:Obs TIME_PERIOD="2008-07-30" OBS_VALUE="26.29489" BBK_DIFF_A="0.16026"/>
      <bbk:Obs TIME_PERIOD="2008-07-29" OBS_VALUE="26.13463" BBK_DIFF_A="0.02791"/>
      <bbk:Obs TIME_PERIOD="2008-07-28" OBS_VALUE="26.10672" BBK_DIFF_A="27.2174"/>
      <bbk:Obs TIME_PERIOD="2008-07-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-07-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-07-25" OBS_VALUE="-1.11068" BBK_DIFF_A="0.04578"/>
      <bbk:Obs TIME_PERIOD="2008-07-24" OBS_VALUE="-1.15646" BBK_DIFF_A="-0.07096"/>
      <bbk:Obs TIME_PERIOD="2008-07-23" OBS_VALUE="-1.0855" BBK_DIFF_A="0.03497"/>
      <bbk:Obs TIME_PERIOD="2008-07-22" OBS_VALUE="-1.12047" BBK_DIFF_A="-0.01263"/>
      <bbk:Obs TIME_PERIOD="2008-07-21" OBS_VALUE="-1.10784" BBK_DIFF_A="-2.8117"/>
      <bbk:Obs TIME_PERIOD="2008-07-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-07-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-07-18" OBS_VALUE="1.70386" BBK_DIFF_A="-0.03879"/>
      <bbk:Obs TIME_PERIOD="2008-07-17" OBS_VALUE="1.74265" BBK_DIFF_A="-0.02305"/>
      <bbk:Obs TIME_PERIOD="2008-07-16" OBS_VALUE="1.7657" BBK_DIFF_A="-0.02236"/>
      <bbk:Obs TIME_PERIOD="2008-07-15" OBS_VALUE="1.78806" BBK_DIFF_A="2.72924"/>
      <bbk:Obs TIME_PERIOD="2008-07-14" OBS_VALUE="-0.94118" BBK_DIFF_A="0.08332"/>
      <bbk:Obs TIME_PERIOD="2008-07-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-07-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-07-11" OBS_VALUE="-1.0245" BBK_DIFF_A="-0.03102"/>
      <bbk:Obs TIME_PERIOD="2008-07-10" OBS_VALUE="-0.99348" BBK_DIFF_A="0.11042"/>
      <bbk:Obs TIME_PERIOD="2008-07-09" OBS_VALUE="-1.1039" BBK_DIFF_A="-0.07925"/>
      <bbk:Obs TIME_PERIOD="2008-07-08" OBS_VALUE="-1.02465" BBK_DIFF_A="-0.02038"/>
      <bbk:Obs TIME_PERIOD="2008-07-07" OBS_VALUE="-1.00427" BBK_DIFF_A="0.07417"/>
      <bbk:Obs TIME_PERIOD="2008-07-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-07-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-07-04" OBS_VALUE="-1.07844" BBK_DIFF_A="-2.03945"/>
      <bbk:Obs TIME_PERIOD="2008-07-03" OBS_VALUE="0.96101" BBK_DIFF_A="0.34451"/>
      <bbk:Obs TIME_PERIOD="2008-07-02" OBS_VALUE="0.6165" BBK_DIFF_A="-3.15023"/>
      <bbk:Obs TIME_PERIOD="2008-07-01" OBS_VALUE="3.76673" BBK_DIFF_A="2.54931"/>
      <bbk:Obs TIME_PERIOD="2008-06-30" OBS_VALUE="1.21742" BBK_DIFF_A="-0.78967"/>
      <bbk:Obs TIME_PERIOD="2008-06-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-06-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-06-27" OBS_VALUE="2.00709" BBK_DIFF_A="-0.04634"/>
      <bbk:Obs TIME_PERIOD="2008-06-26" OBS_VALUE="2.05343" BBK_DIFF_A="-2.65241"/>
      <bbk:Obs TIME_PERIOD="2008-06-25" OBS_VALUE="4.70584" BBK_DIFF_A="-2.49653"/>
      <bbk:Obs TIME_PERIOD="2008-06-24" OBS_VALUE="7.20237" BBK_DIFF_A="0.45651"/>
      <bbk:Obs TIME_PERIOD="2008-06-23" OBS_VALUE="6.74586" BBK_DIFF_A="2.93046"/>
      <bbk:Obs TIME_PERIOD="2008-06-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-06-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-06-20" OBS_VALUE="3.8154" BBK_DIFF_A="1.87738"/>
      <bbk:Obs TIME_PERIOD="2008-06-19" OBS_VALUE="1.93802" BBK_DIFF_A="0.66917"/>
      <bbk:Obs TIME_PERIOD="2008-06-18" OBS_VALUE="1.26885" BBK_DIFF_A="-4.32703"/>
      <bbk:Obs TIME_PERIOD="2008-06-17" OBS_VALUE="5.59588" BBK_DIFF_A="1.06705"/>
      <bbk:Obs TIME_PERIOD="2008-06-16" OBS_VALUE="4.52883" BBK_DIFF_A="2.71215"/>
      <bbk:Obs TIME_PERIOD="2008-06-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-06-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-06-13" OBS_VALUE="1.81668" BBK_DIFF_A="1.01725"/>
      <bbk:Obs TIME_PERIOD="2008-06-12" OBS_VALUE="0.79943" BBK_DIFF_A="-0.22648"/>
      <bbk:Obs TIME_PERIOD="2008-06-11" OBS_VALUE="1.02591" BBK_DIFF_A="1.05918"/>
      <bbk:Obs TIME_PERIOD="2008-06-10" OBS_VALUE="-0.03327" BBK_DIFF_A="0.28117"/>
      <bbk:Obs TIME_PERIOD="2008-06-09" OBS_VALUE="-0.31444" BBK_DIFF_A="1.1262"/>
      <bbk:Obs TIME_PERIOD="2008-06-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-06-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-06-06" OBS_VALUE="-1.44064" BBK_DIFF_A="-1.12645"/>
      <bbk:Obs TIME_PERIOD="2008-06-05" OBS_VALUE="-0.31419" BBK_DIFF_A="0.07781"/>
      <bbk:Obs TIME_PERIOD="2008-06-04" OBS_VALUE="-0.392" BBK_DIFF_A="0.17215"/>
      <bbk:Obs TIME_PERIOD="2008-06-03" OBS_VALUE="-0.56415" BBK_DIFF_A="0.00191"/>
      <bbk:Obs TIME_PERIOD="2008-06-02" OBS_VALUE="-0.56606" BBK_DIFF_A="0.02449"/>
      <bbk:Obs TIME_PERIOD="2008-06-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-05-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-05-30" OBS_VALUE="-0.59055" BBK_DIFF_A="0.17063"/>
      <bbk:Obs TIME_PERIOD="2008-05-29" OBS_VALUE="-0.76118" BBK_DIFF_A="0.52347"/>
      <bbk:Obs TIME_PERIOD="2008-05-28" OBS_VALUE="-1.28465" BBK_DIFF_A="-0.01659"/>
      <bbk:Obs TIME_PERIOD="2008-05-27" OBS_VALUE="-1.26806" BBK_DIFF_A="-0.00276"/>
      <bbk:Obs TIME_PERIOD="2008-05-26" OBS_VALUE="-1.2653" BBK_DIFF_A="0.17767"/>
      <bbk:Obs TIME_PERIOD="2008-05-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-05-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-05-23" OBS_VALUE="-1.44297" BBK_DIFF_A="0.06663"/>
      <bbk:Obs TIME_PERIOD="2008-05-22" OBS_VALUE="-1.5096" BBK_DIFF_A="-0.00247"/>
      <bbk:Obs TIME_PERIOD="2008-05-21" OBS_VALUE="-1.50713" BBK_DIFF_A="0.08265"/>
      <bbk:Obs TIME_PERIOD="2008-05-20" OBS_VALUE="-1.58978" BBK_DIFF_A="-1.64439"/>
      <bbk:Obs TIME_PERIOD="2008-05-19" OBS_VALUE="0.05461" BBK_DIFF_A="0.05312"/>
      <bbk:Obs TIME_PERIOD="2008-05-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-05-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-05-16" OBS_VALUE="0.00149" BBK_DIFF_A="-0.02426"/>
      <bbk:Obs TIME_PERIOD="2008-05-15" OBS_VALUE="0.02575" BBK_DIFF_A="0.0248"/>
      <bbk:Obs TIME_PERIOD="2008-05-14" OBS_VALUE="9.5E-4" BBK_DIFF_A="-0.00152"/>
      <bbk:Obs TIME_PERIOD="2008-05-13" OBS_VALUE="0.00247" BBK_DIFF_A="0.00148"/>
      <bbk:Obs TIME_PERIOD="2008-05-12" OBS_VALUE="9.9E-4" BBK_DIFF_A="-0.00409"/>
      <bbk:Obs TIME_PERIOD="2008-05-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-05-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-05-09" OBS_VALUE="0.00508" BBK_DIFF_A="0.00292"/>
      <bbk:Obs TIME_PERIOD="2008-05-08" OBS_VALUE="0.00216" BBK_DIFF_A="-0.00531"/>
      <bbk:Obs TIME_PERIOD="2008-05-07" OBS_VALUE="0.00747" BBK_DIFF_A="0.00505"/>
      <bbk:Obs TIME_PERIOD="2008-05-06" OBS_VALUE="0.00242" BBK_DIFF_A="0.00126"/>
      <bbk:Obs TIME_PERIOD="2008-05-05" OBS_VALUE="0.00116" BBK_DIFF_A="-0.00215"/>
      <bbk:Obs TIME_PERIOD="2008-05-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-05-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-05-02" OBS_VALUE="0.00331" BBK_DIFF_A="0.00547"/>
      <bbk:Obs TIME_PERIOD="2008-05-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-04-30" OBS_VALUE="-0.00216" BBK_DIFF_A="-0.55676"/>
      <bbk:Obs TIME_PERIOD="2008-04-29" OBS_VALUE="0.5546" BBK_DIFF_A="0.37455"/>
      <bbk:Obs TIME_PERIOD="2008-04-28" OBS_VALUE="0.18005" BBK_DIFF_A="0.13759"/>
      <bbk:Obs TIME_PERIOD="2008-04-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-04-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-04-25" OBS_VALUE="0.04246" BBK_DIFF_A="0.02248"/>
      <bbk:Obs TIME_PERIOD="2008-04-24" OBS_VALUE="0.01998" BBK_DIFF_A="0.02012"/>
      <bbk:Obs TIME_PERIOD="2008-04-23" OBS_VALUE="-1.4E-4" BBK_DIFF_A="-1.7E-4"/>
      <bbk:Obs TIME_PERIOD="2008-04-22" OBS_VALUE="3.0E-5" BBK_DIFF_A="-0.00197"/>
      <bbk:Obs TIME_PERIOD="2008-04-21" OBS_VALUE="0.002" BBK_DIFF_A="0.00667"/>
      <bbk:Obs TIME_PERIOD="2008-04-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-04-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-04-18" OBS_VALUE="-0.00467" BBK_DIFF_A="-0.00351"/>
      <bbk:Obs TIME_PERIOD="2008-04-17" OBS_VALUE="-0.00116" BBK_DIFF_A="0.00293"/>
      <bbk:Obs TIME_PERIOD="2008-04-16" OBS_VALUE="-0.00409" BBK_DIFF_A="-0.00949"/>
      <bbk:Obs TIME_PERIOD="2008-04-15" OBS_VALUE="0.0054" BBK_DIFF_A="0.71648"/>
      <bbk:Obs TIME_PERIOD="2008-04-14" OBS_VALUE="-0.71108" BBK_DIFF_A="2.03977"/>
      <bbk:Obs TIME_PERIOD="2008-04-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-04-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-04-11" OBS_VALUE="-2.75085" BBK_DIFF_A="0.01403"/>
      <bbk:Obs TIME_PERIOD="2008-04-10" OBS_VALUE="-2.76488" BBK_DIFF_A="-0.09632"/>
      <bbk:Obs TIME_PERIOD="2008-04-09" OBS_VALUE="-2.66856" BBK_DIFF_A="-0.23878"/>
      <bbk:Obs TIME_PERIOD="2008-04-08" OBS_VALUE="-2.42978" BBK_DIFF_A="0.06769"/>
      <bbk:Obs TIME_PERIOD="2008-04-07" OBS_VALUE="-2.49747" BBK_DIFF_A="0.1542"/>
      <bbk:Obs TIME_PERIOD="2008-04-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-04-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-04-04" OBS_VALUE="-2.65167" BBK_DIFF_A="-0.02106"/>
      <bbk:Obs TIME_PERIOD="2008-04-03" OBS_VALUE="-2.63061" BBK_DIFF_A="0.01823"/>
      <bbk:Obs TIME_PERIOD="2008-04-02" OBS_VALUE="-2.64884" BBK_DIFF_A="-0.5427"/>
      <bbk:Obs TIME_PERIOD="2008-04-01" OBS_VALUE="-2.10614" BBK_DIFF_A="0.16987"/>
      <bbk:Obs TIME_PERIOD="2008-03-31" OBS_VALUE="-2.27601" BBK_DIFF_A="-0.02226"/>
      <bbk:Obs TIME_PERIOD="2008-03-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-03-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-03-28" OBS_VALUE="-2.25375" BBK_DIFF_A="0.22219"/>
      <bbk:Obs TIME_PERIOD="2008-03-27" OBS_VALUE="-2.47594" BBK_DIFF_A="-0.70717"/>
      <bbk:Obs TIME_PERIOD="2008-03-26" OBS_VALUE="-1.76877" BBK_DIFF_A="0.03701"/>
      <bbk:Obs TIME_PERIOD="2008-03-25" OBS_VALUE="-1.80578" BBK_DIFF_A="0.35319"/>
      <bbk:Obs TIME_PERIOD="2008-03-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-03-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-03-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-03-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-03-20" OBS_VALUE="-2.15897" BBK_DIFF_A="0.17689"/>
      <bbk:Obs TIME_PERIOD="2008-03-19" OBS_VALUE="-2.33586" BBK_DIFF_A="0.2884"/>
      <bbk:Obs TIME_PERIOD="2008-03-18" OBS_VALUE="-2.62426" BBK_DIFF_A="-0.07764"/>
      <bbk:Obs TIME_PERIOD="2008-03-17" OBS_VALUE="-2.54662" BBK_DIFF_A="-0.1735"/>
      <bbk:Obs TIME_PERIOD="2008-03-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-03-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-03-14" OBS_VALUE="-2.37312" BBK_DIFF_A="-0.01908"/>
      <bbk:Obs TIME_PERIOD="2008-03-13" OBS_VALUE="-2.35404" BBK_DIFF_A="-0.29438"/>
      <bbk:Obs TIME_PERIOD="2008-03-12" OBS_VALUE="-2.05966" BBK_DIFF_A="0.18289"/>
      <bbk:Obs TIME_PERIOD="2008-03-11" OBS_VALUE="-2.24255" BBK_DIFF_A="-0.06706"/>
      <bbk:Obs TIME_PERIOD="2008-03-10" OBS_VALUE="-2.17549" BBK_DIFF_A="-1.10898"/>
      <bbk:Obs TIME_PERIOD="2008-03-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-03-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-03-07" OBS_VALUE="-1.06651" BBK_DIFF_A="0.03361"/>
      <bbk:Obs TIME_PERIOD="2008-03-06" OBS_VALUE="-1.10012" BBK_DIFF_A="-0.05338"/>
      <bbk:Obs TIME_PERIOD="2008-03-05" OBS_VALUE="-1.04674" BBK_DIFF_A="-0.06608"/>
      <bbk:Obs TIME_PERIOD="2008-03-04" OBS_VALUE="-0.98066" BBK_DIFF_A="-0.12987"/>
      <bbk:Obs TIME_PERIOD="2008-03-03" OBS_VALUE="-0.85079" BBK_DIFF_A="0.03977"/>
      <bbk:Obs TIME_PERIOD="2008-03-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-03-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-02-29" OBS_VALUE="-0.89056" BBK_DIFF_A="0.14017"/>
      <bbk:Obs TIME_PERIOD="2008-02-28" OBS_VALUE="-1.03073" BBK_DIFF_A="-0.02567"/>
      <bbk:Obs TIME_PERIOD="2008-02-27" OBS_VALUE="-1.00506" BBK_DIFF_A="0.03761"/>
      <bbk:Obs TIME_PERIOD="2008-02-26" OBS_VALUE="-1.04267" BBK_DIFF_A="-0.06409"/>
      <bbk:Obs TIME_PERIOD="2008-02-25" OBS_VALUE="-0.97858" BBK_DIFF_A="-0.07725"/>
      <bbk:Obs TIME_PERIOD="2008-02-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-02-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-02-22" OBS_VALUE="-0.90133" BBK_DIFF_A="-0.00667"/>
      <bbk:Obs TIME_PERIOD="2008-02-21" OBS_VALUE="-0.89466" BBK_DIFF_A="-0.01694"/>
      <bbk:Obs TIME_PERIOD="2008-02-20" OBS_VALUE="-0.87772" BBK_DIFF_A="-0.03967"/>
      <bbk:Obs TIME_PERIOD="2008-02-19" OBS_VALUE="-0.83805" BBK_DIFF_A="0.00164"/>
      <bbk:Obs TIME_PERIOD="2008-02-18" OBS_VALUE="-0.83969" BBK_DIFF_A="0.01153"/>
      <bbk:Obs TIME_PERIOD="2008-02-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-02-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-02-15" OBS_VALUE="-0.85122" BBK_DIFF_A="0.0018"/>
      <bbk:Obs TIME_PERIOD="2008-02-14" OBS_VALUE="-0.85302" BBK_DIFF_A="-0.03489"/>
      <bbk:Obs TIME_PERIOD="2008-02-13" OBS_VALUE="-0.81813" BBK_DIFF_A="-0.09019"/>
      <bbk:Obs TIME_PERIOD="2008-02-12" OBS_VALUE="-0.72794" BBK_DIFF_A="0.00954"/>
      <bbk:Obs TIME_PERIOD="2008-02-11" OBS_VALUE="-0.73748" BBK_DIFF_A="0.06384"/>
      <bbk:Obs TIME_PERIOD="2008-02-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-02-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-02-08" OBS_VALUE="-0.80132" BBK_DIFF_A="-0.07624"/>
      <bbk:Obs TIME_PERIOD="2008-02-07" OBS_VALUE="-0.72508" BBK_DIFF_A="-0.03545"/>
      <bbk:Obs TIME_PERIOD="2008-02-06" OBS_VALUE="-0.68963" BBK_DIFF_A="0.09702"/>
      <bbk:Obs TIME_PERIOD="2008-02-05" OBS_VALUE="-0.78665" BBK_DIFF_A="0.05036"/>
      <bbk:Obs TIME_PERIOD="2008-02-04" OBS_VALUE="-0.83701" BBK_DIFF_A="-0.01023"/>
      <bbk:Obs TIME_PERIOD="2008-02-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-02-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-02-01" OBS_VALUE="-0.82678" BBK_DIFF_A="0.14042"/>
      <bbk:Obs TIME_PERIOD="2008-01-31" OBS_VALUE="-0.9672" BBK_DIFF_A="0.02796"/>
      <bbk:Obs TIME_PERIOD="2008-01-30" OBS_VALUE="-0.99516" BBK_DIFF_A="-0.0557"/>
      <bbk:Obs TIME_PERIOD="2008-01-29" OBS_VALUE="-0.93946" BBK_DIFF_A="-0.10242"/>
      <bbk:Obs TIME_PERIOD="2008-01-28" OBS_VALUE="-0.83704" BBK_DIFF_A="0.11286"/>
      <bbk:Obs TIME_PERIOD="2008-01-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-01-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-01-25" OBS_VALUE="-0.9499" BBK_DIFF_A="0.07208"/>
      <bbk:Obs TIME_PERIOD="2008-01-24" OBS_VALUE="-1.02198" BBK_DIFF_A="-0.12543"/>
      <bbk:Obs TIME_PERIOD="2008-01-23" OBS_VALUE="-0.89655" BBK_DIFF_A="-0.13902"/>
      <bbk:Obs TIME_PERIOD="2008-01-22" OBS_VALUE="-0.75753" BBK_DIFF_A="-0.02899"/>
      <bbk:Obs TIME_PERIOD="2008-01-21" OBS_VALUE="-0.72854" BBK_DIFF_A="0.01428"/>
      <bbk:Obs TIME_PERIOD="2008-01-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-01-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-01-18" OBS_VALUE="-0.74282" BBK_DIFF_A="0.01767"/>
      <bbk:Obs TIME_PERIOD="2008-01-17" OBS_VALUE="-0.76049" BBK_DIFF_A="-0.00454"/>
      <bbk:Obs TIME_PERIOD="2008-01-16" OBS_VALUE="-0.75595" BBK_DIFF_A="0.06678"/>
      <bbk:Obs TIME_PERIOD="2008-01-15" OBS_VALUE="-0.82273" BBK_DIFF_A="-2.58158"/>
      <bbk:Obs TIME_PERIOD="2008-01-14" OBS_VALUE="1.75885" BBK_DIFF_A="0.06853"/>
      <bbk:Obs TIME_PERIOD="2008-01-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-01-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-01-11" OBS_VALUE="1.69032" BBK_DIFF_A="-0.04301"/>
      <bbk:Obs TIME_PERIOD="2008-01-10" OBS_VALUE="1.73333" BBK_DIFF_A="0.68864"/>
      <bbk:Obs TIME_PERIOD="2008-01-09" OBS_VALUE="1.04469" BBK_DIFF_A="0.95877"/>
      <bbk:Obs TIME_PERIOD="2008-01-08" OBS_VALUE="0.08592" BBK_DIFF_A="0.05232"/>
      <bbk:Obs TIME_PERIOD="2008-01-07" OBS_VALUE="0.0336" BBK_DIFF_A="-0.07406"/>
      <bbk:Obs TIME_PERIOD="2008-01-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-01-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-01-04" OBS_VALUE="0.10766" BBK_DIFF_A="-1.50893"/>
      <bbk:Obs TIME_PERIOD="2008-01-03" OBS_VALUE="1.61659" BBK_DIFF_A="0.79879"/>
      <bbk:Obs TIME_PERIOD="2008-01-02" OBS_VALUE="0.8178" BBK_DIFF_A="-0.05805"/>
      <bbk:Obs TIME_PERIOD="2008-01-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-12-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-12-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-12-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-12-28" OBS_VALUE="0.87585" BBK_DIFF_A="2.23129"/>
      <bbk:Obs TIME_PERIOD="2007-12-27" OBS_VALUE="-1.35544" BBK_DIFF_A="0.0987"/>
      <bbk:Obs TIME_PERIOD="2007-12-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-12-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-12-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-12-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-12-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-12-21" OBS_VALUE="-1.45414" BBK_DIFF_A="-0.10209"/>
      <bbk:Obs TIME_PERIOD="2007-12-20" OBS_VALUE="-1.35205" BBK_DIFF_A="0.08843"/>
      <bbk:Obs TIME_PERIOD="2007-12-19" OBS_VALUE="-1.44048" BBK_DIFF_A="-0.2128"/>
      <bbk:Obs TIME_PERIOD="2007-12-18" OBS_VALUE="-1.22768" BBK_DIFF_A="0.19581"/>
      <bbk:Obs TIME_PERIOD="2007-12-17" OBS_VALUE="-1.42349" BBK_DIFF_A="-0.05718"/>
      <bbk:Obs TIME_PERIOD="2007-12-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-12-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-12-14" OBS_VALUE="-1.36631" BBK_DIFF_A="0.07895"/>
      <bbk:Obs TIME_PERIOD="2007-12-13" OBS_VALUE="-1.44526" BBK_DIFF_A="0.24927"/>
      <bbk:Obs TIME_PERIOD="2007-12-12" OBS_VALUE="-1.69453" BBK_DIFF_A="-0.28352"/>
      <bbk:Obs TIME_PERIOD="2007-12-11" OBS_VALUE="-1.41101" BBK_DIFF_A="-0.03022"/>
      <bbk:Obs TIME_PERIOD="2007-12-10" OBS_VALUE="-1.38079" BBK_DIFF_A="0.0952"/>
      <bbk:Obs TIME_PERIOD="2007-12-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-12-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-12-07" OBS_VALUE="-1.47599" BBK_DIFF_A="0.09386"/>
      <bbk:Obs TIME_PERIOD="2007-12-06" OBS_VALUE="-1.56985" BBK_DIFF_A="-0.02766"/>
      <bbk:Obs TIME_PERIOD="2007-12-05" OBS_VALUE="-1.54219" BBK_DIFF_A="0.05156"/>
      <bbk:Obs TIME_PERIOD="2007-12-04" OBS_VALUE="-1.59375" BBK_DIFF_A="-0.08668"/>
      <bbk:Obs TIME_PERIOD="2007-12-03" OBS_VALUE="-1.50707" BBK_DIFF_A="0.18703"/>
      <bbk:Obs TIME_PERIOD="2007-12-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-12-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-11-30" OBS_VALUE="-1.6941" BBK_DIFF_A="0.04712"/>
      <bbk:Obs TIME_PERIOD="2007-11-29" OBS_VALUE="-1.74122" BBK_DIFF_A="-0.05551"/>
      <bbk:Obs TIME_PERIOD="2007-11-28" OBS_VALUE="-1.68571" BBK_DIFF_A="-0.00107"/>
      <bbk:Obs TIME_PERIOD="2007-11-27" OBS_VALUE="-1.68464" BBK_DIFF_A="0.05302"/>
      <bbk:Obs TIME_PERIOD="2007-11-26" OBS_VALUE="-1.73766" BBK_DIFF_A="-0.90817"/>
      <bbk:Obs TIME_PERIOD="2007-11-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-11-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-11-23" OBS_VALUE="-0.82949" BBK_DIFF_A="-0.07109"/>
      <bbk:Obs TIME_PERIOD="2007-11-22" OBS_VALUE="-0.7584" BBK_DIFF_A="-0.08318"/>
      <bbk:Obs TIME_PERIOD="2007-11-21" OBS_VALUE="-0.67522" BBK_DIFF_A="-0.02488"/>
      <bbk:Obs TIME_PERIOD="2007-11-20" OBS_VALUE="-0.65034" BBK_DIFF_A="0.04685"/>
      <bbk:Obs TIME_PERIOD="2007-11-19" OBS_VALUE="-0.69719" BBK_DIFF_A="0.00487"/>
      <bbk:Obs TIME_PERIOD="2007-11-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-11-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-11-16" OBS_VALUE="-0.70206" BBK_DIFF_A="0.02021"/>
      <bbk:Obs TIME_PERIOD="2007-11-15" OBS_VALUE="-0.72227" BBK_DIFF_A="0.07284"/>
      <bbk:Obs TIME_PERIOD="2007-11-14" OBS_VALUE="-0.79511" BBK_DIFF_A="-0.08939"/>
      <bbk:Obs TIME_PERIOD="2007-11-13" OBS_VALUE="-0.70572" BBK_DIFF_A="0.04302"/>
      <bbk:Obs TIME_PERIOD="2007-11-12" OBS_VALUE="-0.74874" BBK_DIFF_A="-0.04914"/>
      <bbk:Obs TIME_PERIOD="2007-11-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-11-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-11-09" OBS_VALUE="-0.6996" BBK_DIFF_A="-0.10512"/>
      <bbk:Obs TIME_PERIOD="2007-11-08" OBS_VALUE="-0.59448" BBK_DIFF_A="0.03124"/>
      <bbk:Obs TIME_PERIOD="2007-11-07" OBS_VALUE="-0.62572" BBK_DIFF_A="-0.0209"/>
      <bbk:Obs TIME_PERIOD="2007-11-06" OBS_VALUE="-0.60482" BBK_DIFF_A="0.08042"/>
      <bbk:Obs TIME_PERIOD="2007-11-05" OBS_VALUE="-0.68524" BBK_DIFF_A="0.05044"/>
      <bbk:Obs TIME_PERIOD="2007-11-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-11-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-11-02" OBS_VALUE="-0.73568" BBK_DIFF_A="0.33579"/>
      <bbk:Obs TIME_PERIOD="2007-11-01" OBS_VALUE="-1.07147" BBK_DIFF_A="0.01561"/>
      <bbk:Obs TIME_PERIOD="2007-10-31" OBS_VALUE="-1.08708" BBK_DIFF_A="-0.03246"/>
      <bbk:Obs TIME_PERIOD="2007-10-30" OBS_VALUE="-1.05462" BBK_DIFF_A="-0.01054"/>
      <bbk:Obs TIME_PERIOD="2007-10-29" OBS_VALUE="-1.04408" BBK_DIFF_A="0.07086"/>
      <bbk:Obs TIME_PERIOD="2007-10-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-10-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-10-26" OBS_VALUE="-1.11494" BBK_DIFF_A="-0.06589"/>
      <bbk:Obs TIME_PERIOD="2007-10-25" OBS_VALUE="-1.04905" BBK_DIFF_A="0.02384"/>
      <bbk:Obs TIME_PERIOD="2007-10-24" OBS_VALUE="-1.07289" BBK_DIFF_A="-0.0362"/>
      <bbk:Obs TIME_PERIOD="2007-10-23" OBS_VALUE="-1.03669" BBK_DIFF_A="-0.2904"/>
      <bbk:Obs TIME_PERIOD="2007-10-22" OBS_VALUE="-0.74629" BBK_DIFF_A="0.08355"/>
      <bbk:Obs TIME_PERIOD="2007-10-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-10-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-10-19" OBS_VALUE="-0.82984" BBK_DIFF_A="0.11308"/>
      <bbk:Obs TIME_PERIOD="2007-10-18" OBS_VALUE="-0.94292" BBK_DIFF_A="0.04492"/>
      <bbk:Obs TIME_PERIOD="2007-10-17" OBS_VALUE="-0.98784" BBK_DIFF_A="0.03361"/>
      <bbk:Obs TIME_PERIOD="2007-10-16" OBS_VALUE="-1.02145" BBK_DIFF_A="0.01222"/>
      <bbk:Obs TIME_PERIOD="2007-10-15" OBS_VALUE="-1.03367" BBK_DIFF_A="-0.12571"/>
      <bbk:Obs TIME_PERIOD="2007-10-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-10-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-10-12" OBS_VALUE="-0.90796" BBK_DIFF_A="0.0806"/>
      <bbk:Obs TIME_PERIOD="2007-10-11" OBS_VALUE="-0.98856" BBK_DIFF_A="-0.04969"/>
      <bbk:Obs TIME_PERIOD="2007-10-10" OBS_VALUE="-0.93887" BBK_DIFF_A="-0.07868"/>
      <bbk:Obs TIME_PERIOD="2007-10-09" OBS_VALUE="-0.86019" BBK_DIFF_A="-0.92669"/>
      <bbk:Obs TIME_PERIOD="2007-10-08" OBS_VALUE="0.0665" BBK_DIFF_A="-0.06367"/>
      <bbk:Obs TIME_PERIOD="2007-10-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-10-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-10-05" OBS_VALUE="0.13017" BBK_DIFF_A="0.03896"/>
      <bbk:Obs TIME_PERIOD="2007-10-04" OBS_VALUE="0.09121" BBK_DIFF_A="-0.05613"/>
      <bbk:Obs TIME_PERIOD="2007-10-03" OBS_VALUE="0.14734" BBK_DIFF_A="0.94483"/>
      <bbk:Obs TIME_PERIOD="2007-10-02" OBS_VALUE="-0.79749" BBK_DIFF_A="-0.5057"/>
      <bbk:Obs TIME_PERIOD="2007-10-01" OBS_VALUE="-0.29179" BBK_DIFF_A="0.43484"/>
      <bbk:Obs TIME_PERIOD="2007-09-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-09-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-09-28" OBS_VALUE="-0.72663" BBK_DIFF_A="0.35596"/>
      <bbk:Obs TIME_PERIOD="2007-09-27" OBS_VALUE="-1.08259" BBK_DIFF_A="0.46105"/>
      <bbk:Obs TIME_PERIOD="2007-09-26" OBS_VALUE="-1.54364" BBK_DIFF_A="0.15294"/>
      <bbk:Obs TIME_PERIOD="2007-09-25" OBS_VALUE="-1.69658" BBK_DIFF_A="2.16699"/>
      <bbk:Obs TIME_PERIOD="2007-09-24" OBS_VALUE="-3.86357" BBK_DIFF_A="-0.75267"/>
      <bbk:Obs TIME_PERIOD="2007-09-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-09-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-09-21" OBS_VALUE="-3.1109" BBK_DIFF_A="-1.221"/>
      <bbk:Obs TIME_PERIOD="2007-09-20" OBS_VALUE="-1.8899" BBK_DIFF_A="-0.25038"/>
      <bbk:Obs TIME_PERIOD="2007-09-19" OBS_VALUE="-1.63952" BBK_DIFF_A="-0.93606"/>
      <bbk:Obs TIME_PERIOD="2007-09-18" OBS_VALUE="-0.70346" BBK_DIFF_A="0.4902"/>
      <bbk:Obs TIME_PERIOD="2007-09-17" OBS_VALUE="-1.19366" BBK_DIFF_A="-0.48214"/>
      <bbk:Obs TIME_PERIOD="2007-09-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-09-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-09-14" OBS_VALUE="-0.71152" BBK_DIFF_A="0.33133"/>
      <bbk:Obs TIME_PERIOD="2007-09-13" OBS_VALUE="-1.04285" BBK_DIFF_A="-0.24377"/>
      <bbk:Obs TIME_PERIOD="2007-09-12" OBS_VALUE="-0.79908" BBK_DIFF_A="-0.50559"/>
      <bbk:Obs TIME_PERIOD="2007-09-11" OBS_VALUE="-0.29349" BBK_DIFF_A="0.30972"/>
      <bbk:Obs TIME_PERIOD="2007-09-10" OBS_VALUE="-0.60321" BBK_DIFF_A="-0.26665"/>
      <bbk:Obs TIME_PERIOD="2007-09-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-09-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-09-07" OBS_VALUE="-0.33656" BBK_DIFF_A="0.1188"/>
      <bbk:Obs TIME_PERIOD="2007-09-06" OBS_VALUE="-0.45536" BBK_DIFF_A="0.0057"/>
      <bbk:Obs TIME_PERIOD="2007-09-05" OBS_VALUE="-0.46106" BBK_DIFF_A="-0.27658"/>
      <bbk:Obs TIME_PERIOD="2007-09-04" OBS_VALUE="-0.18448" BBK_DIFF_A="0.11447"/>
      <bbk:Obs TIME_PERIOD="2007-09-03" OBS_VALUE="-0.29895" BBK_DIFF_A="0.02227"/>
      <bbk:Obs TIME_PERIOD="2007-09-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-09-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-08-31" OBS_VALUE="-0.32122" BBK_DIFF_A="-0.13032"/>
      <bbk:Obs TIME_PERIOD="2007-08-30" OBS_VALUE="-0.1909" BBK_DIFF_A="0.51511"/>
      <bbk:Obs TIME_PERIOD="2007-08-29" OBS_VALUE="-0.70601" BBK_DIFF_A="-0.76404"/>
      <bbk:Obs TIME_PERIOD="2007-08-28" OBS_VALUE="0.05803" BBK_DIFF_A="0.47647"/>
      <bbk:Obs TIME_PERIOD="2007-08-27" OBS_VALUE="-0.41844" BBK_DIFF_A="-0.11981"/>
      <bbk:Obs TIME_PERIOD="2007-08-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-08-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-08-24" OBS_VALUE="-0.29863" BBK_DIFF_A="0.57042"/>
      <bbk:Obs TIME_PERIOD="2007-08-23" OBS_VALUE="-0.86905" BBK_DIFF_A="-0.14228"/>
      <bbk:Obs TIME_PERIOD="2007-08-22" OBS_VALUE="-0.72677" BBK_DIFF_A="-0.37211"/>
      <bbk:Obs TIME_PERIOD="2007-08-21" OBS_VALUE="-0.35466" BBK_DIFF_A="0.343"/>
      <bbk:Obs TIME_PERIOD="2007-08-20" OBS_VALUE="-0.69766" BBK_DIFF_A="-0.25409"/>
      <bbk:Obs TIME_PERIOD="2007-08-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-08-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-08-17" OBS_VALUE="-0.44357" BBK_DIFF_A="1.33931"/>
      <bbk:Obs TIME_PERIOD="2007-08-16" OBS_VALUE="-1.78288" BBK_DIFF_A="-2.11388"/>
      <bbk:Obs TIME_PERIOD="2007-08-15" OBS_VALUE="0.331" BBK_DIFF_A="0.09055"/>
      <bbk:Obs TIME_PERIOD="2007-08-14" OBS_VALUE="0.24045" BBK_DIFF_A="-0.02218"/>
      <bbk:Obs TIME_PERIOD="2007-08-13" OBS_VALUE="0.26263" BBK_DIFF_A="0.77394"/>
      <bbk:Obs TIME_PERIOD="2007-08-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-08-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-08-10" OBS_VALUE="-0.51131" BBK_DIFF_A="0.1549"/>
      <bbk:Obs TIME_PERIOD="2007-08-09" OBS_VALUE="-0.66621" BBK_DIFF_A="-0.07175"/>
      <bbk:Obs TIME_PERIOD="2007-08-08" OBS_VALUE="-0.59446" BBK_DIFF_A="0.14526"/>
      <bbk:Obs TIME_PERIOD="2007-08-07" OBS_VALUE="-0.73972" BBK_DIFF_A="-0.72424"/>
      <bbk:Obs TIME_PERIOD="2007-08-06" OBS_VALUE="-0.01548" BBK_DIFF_A="-0.00962"/>
      <bbk:Obs TIME_PERIOD="2007-08-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-08-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-08-03" OBS_VALUE="-0.00586" BBK_DIFF_A="0.15504"/>
      <bbk:Obs TIME_PERIOD="2007-08-02" OBS_VALUE="-0.1609" BBK_DIFF_A="-0.03206"/>
      <bbk:Obs TIME_PERIOD="2007-08-01" OBS_VALUE="-0.12884" BBK_DIFF_A="0.40943"/>
      <bbk:Obs TIME_PERIOD="2007-07-31" OBS_VALUE="-0.53827" BBK_DIFF_A="0.78908"/>
      <bbk:Obs TIME_PERIOD="2007-07-30" OBS_VALUE="-1.32735" BBK_DIFF_A="-0.23782"/>
      <bbk:Obs TIME_PERIOD="2007-07-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-07-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-07-27" OBS_VALUE="-1.08953" BBK_DIFF_A="-0.22834"/>
      <bbk:Obs TIME_PERIOD="2007-07-26" OBS_VALUE="-0.86119" BBK_DIFF_A="0.00737"/>
      <bbk:Obs TIME_PERIOD="2007-07-25" OBS_VALUE="-0.86856" BBK_DIFF_A="0.02203"/>
      <bbk:Obs TIME_PERIOD="2007-07-24" OBS_VALUE="-0.89059" BBK_DIFF_A="0.01139"/>
      <bbk:Obs TIME_PERIOD="2007-07-23" OBS_VALUE="-0.90198" BBK_DIFF_A="0.00966"/>
      <bbk:Obs TIME_PERIOD="2007-07-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-07-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-07-20" OBS_VALUE="-0.91164" BBK_DIFF_A="0.01888"/>
      <bbk:Obs TIME_PERIOD="2007-07-19" OBS_VALUE="-0.93052" BBK_DIFF_A="-0.02159"/>
      <bbk:Obs TIME_PERIOD="2007-07-18" OBS_VALUE="-0.90893" BBK_DIFF_A="-0.01132"/>
      <bbk:Obs TIME_PERIOD="2007-07-17" OBS_VALUE="-0.89761" BBK_DIFF_A="0.04124"/>
      <bbk:Obs TIME_PERIOD="2007-07-16" OBS_VALUE="-0.93885" BBK_DIFF_A="4.8E-4"/>
      <bbk:Obs TIME_PERIOD="2007-07-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-07-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-07-13" OBS_VALUE="-0.93933" BBK_DIFF_A="-0.01271"/>
      <bbk:Obs TIME_PERIOD="2007-07-12" OBS_VALUE="-0.92662" BBK_DIFF_A="0.00167"/>
      <bbk:Obs TIME_PERIOD="2007-07-11" OBS_VALUE="-0.92829" BBK_DIFF_A="0.03931"/>
      <bbk:Obs TIME_PERIOD="2007-07-10" OBS_VALUE="-0.9676" BBK_DIFF_A="0.0545"/>
      <bbk:Obs TIME_PERIOD="2007-07-09" OBS_VALUE="-1.0221" BBK_DIFF_A="-0.01562"/>
      <bbk:Obs TIME_PERIOD="2007-07-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-07-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-07-06" OBS_VALUE="-1.00648" BBK_DIFF_A="0.01525"/>
      <bbk:Obs TIME_PERIOD="2007-07-05" OBS_VALUE="-1.02173" BBK_DIFF_A="-0.05359"/>
      <bbk:Obs TIME_PERIOD="2007-07-04" OBS_VALUE="-0.96814" BBK_DIFF_A="-0.05852"/>
      <bbk:Obs TIME_PERIOD="2007-07-03" OBS_VALUE="-0.90962" BBK_DIFF_A="-0.00216"/>
      <bbk:Obs TIME_PERIOD="2007-07-02" OBS_VALUE="-0.90746" BBK_DIFF_A="0.06137"/>
      <bbk:Obs TIME_PERIOD="2007-07-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-06-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-06-29" OBS_VALUE="-0.96883" BBK_DIFF_A="0.01131"/>
      <bbk:Obs TIME_PERIOD="2007-06-28" OBS_VALUE="-0.98014" BBK_DIFF_A="-0.08084"/>
      <bbk:Obs TIME_PERIOD="2007-06-27" OBS_VALUE="-0.8993" BBK_DIFF_A="0.01814"/>
      <bbk:Obs TIME_PERIOD="2007-06-26" OBS_VALUE="-0.91744" BBK_DIFF_A="0.0282"/>
      <bbk:Obs TIME_PERIOD="2007-06-25" OBS_VALUE="-0.94564" BBK_DIFF_A="0.0807"/>
      <bbk:Obs TIME_PERIOD="2007-06-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-06-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-06-22" OBS_VALUE="-1.02634" BBK_DIFF_A="0.04892"/>
      <bbk:Obs TIME_PERIOD="2007-06-21" OBS_VALUE="-1.07526" BBK_DIFF_A="-0.02429"/>
      <bbk:Obs TIME_PERIOD="2007-06-20" OBS_VALUE="-1.05097" BBK_DIFF_A="0.0887"/>
      <bbk:Obs TIME_PERIOD="2007-06-19" OBS_VALUE="-1.13967" BBK_DIFF_A="-0.02411"/>
      <bbk:Obs TIME_PERIOD="2007-06-18" OBS_VALUE="-1.11556" BBK_DIFF_A="0.0615"/>
      <bbk:Obs TIME_PERIOD="2007-06-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-06-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-06-15" OBS_VALUE="-1.17706" BBK_DIFF_A="-0.10762"/>
      <bbk:Obs TIME_PERIOD="2007-06-14" OBS_VALUE="-1.06944" BBK_DIFF_A="0.13411"/>
      <bbk:Obs TIME_PERIOD="2007-06-13" OBS_VALUE="-1.20355" BBK_DIFF_A="-0.15442"/>
      <bbk:Obs TIME_PERIOD="2007-06-12" OBS_VALUE="-1.04913" BBK_DIFF_A="-0.03062"/>
      <bbk:Obs TIME_PERIOD="2007-06-11" OBS_VALUE="-1.01851" BBK_DIFF_A="0.0946"/>
      <bbk:Obs TIME_PERIOD="2007-06-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-06-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-06-08" OBS_VALUE="-1.11311" BBK_DIFF_A="-0.09843"/>
      <bbk:Obs TIME_PERIOD="2007-06-07" OBS_VALUE="-1.01468" BBK_DIFF_A="-0.01032"/>
      <bbk:Obs TIME_PERIOD="2007-06-06" OBS_VALUE="-1.00436" BBK_DIFF_A="-0.13401"/>
      <bbk:Obs TIME_PERIOD="2007-06-05" OBS_VALUE="-0.87035" BBK_DIFF_A="0.15698"/>
      <bbk:Obs TIME_PERIOD="2007-06-04" OBS_VALUE="-1.02733" BBK_DIFF_A="-0.10225"/>
      <bbk:Obs TIME_PERIOD="2007-06-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-06-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-06-01" OBS_VALUE="-0.92508" BBK_DIFF_A="0.08182"/>
      <bbk:Obs TIME_PERIOD="2007-05-31" OBS_VALUE="-1.0069" BBK_DIFF_A="-0.15784"/>
      <bbk:Obs TIME_PERIOD="2007-05-30" OBS_VALUE="-0.84906" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2007-05-29" OBS_VALUE="-0.84906" BBK_DIFF_A="-0.10059"/>
      <bbk:Obs TIME_PERIOD="2007-05-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-05-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-05-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-05-25" OBS_VALUE="-0.74847" BBK_DIFF_A="0.16507"/>
      <bbk:Obs TIME_PERIOD="2007-05-24" OBS_VALUE="-0.91354" BBK_DIFF_A="0.05432"/>
      <bbk:Obs TIME_PERIOD="2007-05-23" OBS_VALUE="-0.96786" BBK_DIFF_A="-0.07037"/>
      <bbk:Obs TIME_PERIOD="2007-05-22" OBS_VALUE="-0.89749" BBK_DIFF_A="0.00269"/>
      <bbk:Obs TIME_PERIOD="2007-05-21" OBS_VALUE="-0.90018" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2007-05-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-05-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-05-18" OBS_VALUE="-0.90018" BBK_DIFF_A="-0.02169"/>
      <bbk:Obs TIME_PERIOD="2007-05-17" OBS_VALUE="-0.87849" BBK_DIFF_A="-0.03109"/>
      <bbk:Obs TIME_PERIOD="2007-05-16" OBS_VALUE="-0.8474" BBK_DIFF_A="-0.06432"/>
      <bbk:Obs TIME_PERIOD="2007-05-15" OBS_VALUE="-0.78308" BBK_DIFF_A="-0.01324"/>
      <bbk:Obs TIME_PERIOD="2007-05-14" OBS_VALUE="-0.76984" BBK_DIFF_A="-0.07564"/>
      <bbk:Obs TIME_PERIOD="2007-05-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-05-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-05-11" OBS_VALUE="-0.6942" BBK_DIFF_A="0.08606"/>
      <bbk:Obs TIME_PERIOD="2007-05-10" OBS_VALUE="-0.78026" BBK_DIFF_A="0.03285"/>
      <bbk:Obs TIME_PERIOD="2007-05-09" OBS_VALUE="-0.81311" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2007-05-08" OBS_VALUE="-0.81311" BBK_DIFF_A="-0.00893"/>
      <bbk:Obs TIME_PERIOD="2007-05-07" OBS_VALUE="-0.80418" BBK_DIFF_A="-0.00451"/>
      <bbk:Obs TIME_PERIOD="2007-05-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-05-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-05-04" OBS_VALUE="-0.79967" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2007-05-03" OBS_VALUE="-0.79967" BBK_DIFF_A="-0.02518"/>
      <bbk:Obs TIME_PERIOD="2007-05-02" OBS_VALUE="-0.77449" BBK_DIFF_A="0.01867"/>
      <bbk:Obs TIME_PERIOD="2007-05-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-04-30" OBS_VALUE="-0.79316" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2007-04-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-04-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-04-27" OBS_VALUE="-0.79316" BBK_DIFF_A="-0.02251"/>
      <bbk:Obs TIME_PERIOD="2007-04-26" OBS_VALUE="-0.77065" BBK_DIFF_A="0.03224"/>
      <bbk:Obs TIME_PERIOD="2007-04-25" OBS_VALUE="-0.80289" BBK_DIFF_A="-0.06532"/>
      <bbk:Obs TIME_PERIOD="2007-04-24" OBS_VALUE="-0.73757" BBK_DIFF_A="0.00459"/>
      <bbk:Obs TIME_PERIOD="2007-04-23" OBS_VALUE="-0.74216" BBK_DIFF_A="0.07556"/>
      <bbk:Obs TIME_PERIOD="2007-04-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-04-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-04-20" OBS_VALUE="-0.81772" BBK_DIFF_A="-0.02221"/>
      <bbk:Obs TIME_PERIOD="2007-04-19" OBS_VALUE="-0.79551" BBK_DIFF_A="0.03496"/>
      <bbk:Obs TIME_PERIOD="2007-04-18" OBS_VALUE="-0.83047" BBK_DIFF_A="0.12109"/>
      <bbk:Obs TIME_PERIOD="2007-04-17" OBS_VALUE="-0.95156" BBK_DIFF_A="-0.03902"/>
      <bbk:Obs TIME_PERIOD="2007-04-16" OBS_VALUE="-0.91254" BBK_DIFF_A="-0.02868"/>
      <bbk:Obs TIME_PERIOD="2007-04-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-04-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-04-13" OBS_VALUE="-0.88386" BBK_DIFF_A="-0.06458"/>
      <bbk:Obs TIME_PERIOD="2007-04-12" OBS_VALUE="-0.81928" BBK_DIFF_A="0.00447"/>
      <bbk:Obs TIME_PERIOD="2007-04-11" OBS_VALUE="-0.82375" BBK_DIFF_A="-0.02725"/>
      <bbk:Obs TIME_PERIOD="2007-04-10" OBS_VALUE="-0.7965" BBK_DIFF_A="-0.0392"/>
      <bbk:Obs TIME_PERIOD="2007-04-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-04-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-04-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-04-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-04-05" OBS_VALUE="-0.7573" BBK_DIFF_A="-0.0172"/>
      <bbk:Obs TIME_PERIOD="2007-04-04" OBS_VALUE="-0.7401" BBK_DIFF_A="-0.02693"/>
      <bbk:Obs TIME_PERIOD="2007-04-03" OBS_VALUE="-0.71317" BBK_DIFF_A="-0.02951"/>
      <bbk:Obs TIME_PERIOD="2007-04-02" OBS_VALUE="-0.68366" BBK_DIFF_A="0.05012"/>
      <bbk:Obs TIME_PERIOD="2007-04-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-03-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-03-30" OBS_VALUE="-0.73378" BBK_DIFF_A="0.04008"/>
      <bbk:Obs TIME_PERIOD="2007-03-29" OBS_VALUE="-0.77386" BBK_DIFF_A="-0.04033"/>
      <bbk:Obs TIME_PERIOD="2007-03-28" OBS_VALUE="-0.73353" BBK_DIFF_A="0.0307"/>
      <bbk:Obs TIME_PERIOD="2007-03-27" OBS_VALUE="-0.76423" BBK_DIFF_A="0.00349"/>
      <bbk:Obs TIME_PERIOD="2007-03-26" OBS_VALUE="-0.76772" BBK_DIFF_A="-0.03113"/>
      <bbk:Obs TIME_PERIOD="2007-03-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-03-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-03-23" OBS_VALUE="-0.73659" BBK_DIFF_A="-0.04614"/>
      <bbk:Obs TIME_PERIOD="2007-03-22" OBS_VALUE="-0.69045" BBK_DIFF_A="-0.00277"/>
      <bbk:Obs TIME_PERIOD="2007-03-21" OBS_VALUE="-0.68768" BBK_DIFF_A="-1.4E-4"/>
      <bbk:Obs TIME_PERIOD="2007-03-20" OBS_VALUE="-0.68754" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2007-03-19" OBS_VALUE="-0.68754" BBK_DIFF_A="-0.00378"/>
      <bbk:Obs TIME_PERIOD="2007-03-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-03-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-03-16" OBS_VALUE="-0.68376" BBK_DIFF_A="-0.0203"/>
      <bbk:Obs TIME_PERIOD="2007-03-15" OBS_VALUE="-0.66346" BBK_DIFF_A="-0.0044"/>
      <bbk:Obs TIME_PERIOD="2007-03-14" OBS_VALUE="-0.65906" BBK_DIFF_A="0.22898"/>
      <bbk:Obs TIME_PERIOD="2007-03-13" OBS_VALUE="-0.88804" BBK_DIFF_A="-0.16842"/>
      <bbk:Obs TIME_PERIOD="2007-03-12" OBS_VALUE="-0.71962" BBK_DIFF_A="0.14464"/>
      <bbk:Obs TIME_PERIOD="2007-03-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-03-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-03-09" OBS_VALUE="-0.86426" BBK_DIFF_A="-0.2641"/>
      <bbk:Obs TIME_PERIOD="2007-03-08" OBS_VALUE="-0.60016" BBK_DIFF_A="0.02461"/>
      <bbk:Obs TIME_PERIOD="2007-03-07" OBS_VALUE="-0.62477" BBK_DIFF_A="-0.05369"/>
      <bbk:Obs TIME_PERIOD="2007-03-06" OBS_VALUE="-0.57108" BBK_DIFF_A="-0.01176"/>
      <bbk:Obs TIME_PERIOD="2007-03-05" OBS_VALUE="-0.55932" BBK_DIFF_A="0.09614"/>
      <bbk:Obs TIME_PERIOD="2007-03-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-03-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-03-02" OBS_VALUE="-0.65546" BBK_DIFF_A="0.08496"/>
      <bbk:Obs TIME_PERIOD="2007-03-01" OBS_VALUE="-0.74042" BBK_DIFF_A="-0.04251"/>
      <bbk:Obs TIME_PERIOD="2007-02-28" OBS_VALUE="-0.69791" BBK_DIFF_A="0.14173"/>
      <bbk:Obs TIME_PERIOD="2007-02-27" OBS_VALUE="-0.83964" BBK_DIFF_A="0.01772"/>
      <bbk:Obs TIME_PERIOD="2007-02-26" OBS_VALUE="-0.85736" BBK_DIFF_A="-0.04225"/>
      <bbk:Obs TIME_PERIOD="2007-02-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-02-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-02-23" OBS_VALUE="-0.81511" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2007-02-22" OBS_VALUE="-0.81511" BBK_DIFF_A="0.01556"/>
      <bbk:Obs TIME_PERIOD="2007-02-21" OBS_VALUE="-0.83067" BBK_DIFF_A="0.09468"/>
      <bbk:Obs TIME_PERIOD="2007-02-20" OBS_VALUE="-0.92535" BBK_DIFF_A="0.00561"/>
      <bbk:Obs TIME_PERIOD="2007-02-19" OBS_VALUE="-0.93096" BBK_DIFF_A="-2.5E-4"/>
      <bbk:Obs TIME_PERIOD="2007-02-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-02-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-02-16" OBS_VALUE="-0.93071" BBK_DIFF_A="-0.063"/>
      <bbk:Obs TIME_PERIOD="2007-02-15" OBS_VALUE="-0.86771" BBK_DIFF_A="-0.07828"/>
      <bbk:Obs TIME_PERIOD="2007-02-14" OBS_VALUE="-0.78943" BBK_DIFF_A="-0.01858"/>
      <bbk:Obs TIME_PERIOD="2007-02-13" OBS_VALUE="-0.77085" BBK_DIFF_A="0.1241"/>
      <bbk:Obs TIME_PERIOD="2007-02-12" OBS_VALUE="-0.89495" BBK_DIFF_A="-0.04177"/>
      <bbk:Obs TIME_PERIOD="2007-02-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-02-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-02-09" OBS_VALUE="-0.85318" BBK_DIFF_A="-0.10105"/>
      <bbk:Obs TIME_PERIOD="2007-02-08" OBS_VALUE="-0.75213" BBK_DIFF_A="0.08606"/>
      <bbk:Obs TIME_PERIOD="2007-02-07" OBS_VALUE="-0.83819" BBK_DIFF_A="-0.11066"/>
      <bbk:Obs TIME_PERIOD="2007-02-06" OBS_VALUE="-0.72753" BBK_DIFF_A="-0.03175"/>
      <bbk:Obs TIME_PERIOD="2007-02-05" OBS_VALUE="-0.69578" BBK_DIFF_A="0.07599"/>
      <bbk:Obs TIME_PERIOD="2007-02-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-02-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-02-02" OBS_VALUE="-0.77177" BBK_DIFF_A="0.18127"/>
      <bbk:Obs TIME_PERIOD="2007-02-01" OBS_VALUE="-0.95304" BBK_DIFF_A="-0.01002"/>
      <bbk:Obs TIME_PERIOD="2007-01-31" OBS_VALUE="-0.94302" BBK_DIFF_A="0.05244"/>
      <bbk:Obs TIME_PERIOD="2007-01-30" OBS_VALUE="-0.99546" BBK_DIFF_A="-0.02438"/>
      <bbk:Obs TIME_PERIOD="2007-01-29" OBS_VALUE="-0.97108" BBK_DIFF_A="0.03519"/>
      <bbk:Obs TIME_PERIOD="2007-01-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-01-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-01-26" OBS_VALUE="-1.00627" BBK_DIFF_A="-0.01224"/>
      <bbk:Obs TIME_PERIOD="2007-01-25" OBS_VALUE="-0.99403" BBK_DIFF_A="0.03965"/>
      <bbk:Obs TIME_PERIOD="2007-01-24" OBS_VALUE="-1.03368" BBK_DIFF_A="0.16514"/>
      <bbk:Obs TIME_PERIOD="2007-01-23" OBS_VALUE="-1.19882" BBK_DIFF_A="-0.08283"/>
      <bbk:Obs TIME_PERIOD="2007-01-22" OBS_VALUE="-1.11599" BBK_DIFF_A="0.00407"/>
      <bbk:Obs TIME_PERIOD="2007-01-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-01-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-01-19" OBS_VALUE="-1.12006" BBK_DIFF_A="0.03887"/>
      <bbk:Obs TIME_PERIOD="2007-01-18" OBS_VALUE="-1.15893" BBK_DIFF_A="-0.10866"/>
      <bbk:Obs TIME_PERIOD="2007-01-17" OBS_VALUE="-1.05027" BBK_DIFF_A="-0.1764"/>
      <bbk:Obs TIME_PERIOD="2007-01-16" OBS_VALUE="-0.87387" BBK_DIFF_A="0.46136"/>
      <bbk:Obs TIME_PERIOD="2007-01-15" OBS_VALUE="-1.33523" BBK_DIFF_A="-0.24636"/>
      <bbk:Obs TIME_PERIOD="2007-01-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-01-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-01-12" OBS_VALUE="-1.08887" BBK_DIFF_A="-0.05582"/>
      <bbk:Obs TIME_PERIOD="2007-01-11" OBS_VALUE="-1.03305" BBK_DIFF_A="-0.07661"/>
      <bbk:Obs TIME_PERIOD="2007-01-10" OBS_VALUE="-0.95644" BBK_DIFF_A="0.40493"/>
      <bbk:Obs TIME_PERIOD="2007-01-09" OBS_VALUE="-1.36137" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2007-01-08" OBS_VALUE="-1.36137" BBK_DIFF_A="0.30732"/>
      <bbk:Obs TIME_PERIOD="2007-01-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-01-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-01-05" OBS_VALUE="-1.66869" BBK_DIFF_A="-0.85591"/>
      <bbk:Obs TIME_PERIOD="2007-01-04" OBS_VALUE="-0.81278" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2007-01-03" OBS_VALUE="-0.81278" BBK_DIFF_A="0.1058"/>
      <bbk:Obs TIME_PERIOD="2007-01-02" OBS_VALUE="-0.91858" BBK_DIFF_A="-0.07308"/>
      <bbk:Obs TIME_PERIOD="2007-01-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-12-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-12-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-12-29" OBS_VALUE="-0.8455" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2006-12-28" OBS_VALUE="-0.8455" BBK_DIFF_A="-0.1153"/>
      <bbk:Obs TIME_PERIOD="2006-12-27" OBS_VALUE="-0.7302" BBK_DIFF_A="0.22143"/>
      <bbk:Obs TIME_PERIOD="2006-12-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-12-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-12-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-12-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-12-22" OBS_VALUE="-0.95163" BBK_DIFF_A="-0.02866"/>
      <bbk:Obs TIME_PERIOD="2006-12-21" OBS_VALUE="-0.92297" BBK_DIFF_A="-0.027"/>
      <bbk:Obs TIME_PERIOD="2006-12-20" OBS_VALUE="-0.89597" BBK_DIFF_A="-0.00927"/>
      <bbk:Obs TIME_PERIOD="2006-12-19" OBS_VALUE="-0.8867" BBK_DIFF_A="-0.1271"/>
      <bbk:Obs TIME_PERIOD="2006-12-18" OBS_VALUE="-0.7596" BBK_DIFF_A="-0.06282"/>
      <bbk:Obs TIME_PERIOD="2006-12-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-12-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-12-15" OBS_VALUE="-0.69678" BBK_DIFF_A="0.04808"/>
      <bbk:Obs TIME_PERIOD="2006-12-14" OBS_VALUE="-0.74486" BBK_DIFF_A="-0.17916"/>
      <bbk:Obs TIME_PERIOD="2006-12-13" OBS_VALUE="-0.5657" BBK_DIFF_A="0.02729"/>
      <bbk:Obs TIME_PERIOD="2006-12-12" OBS_VALUE="-0.59299" BBK_DIFF_A="0.02776"/>
      <bbk:Obs TIME_PERIOD="2006-12-11" OBS_VALUE="-0.62075" BBK_DIFF_A="-0.01627"/>
      <bbk:Obs TIME_PERIOD="2006-12-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-12-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-12-08" OBS_VALUE="-0.60448" BBK_DIFF_A="-0.06161"/>
      <bbk:Obs TIME_PERIOD="2006-12-07" OBS_VALUE="-0.54287" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2006-12-06" OBS_VALUE="-0.54287" BBK_DIFF_A="-0.20236"/>
      <bbk:Obs TIME_PERIOD="2006-12-05" OBS_VALUE="-0.34051" BBK_DIFF_A="0.14371"/>
      <bbk:Obs TIME_PERIOD="2006-12-04" OBS_VALUE="-0.48422" BBK_DIFF_A="-0.24211"/>
      <bbk:Obs TIME_PERIOD="2006-12-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-12-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-12-01" OBS_VALUE="-0.24211" BBK_DIFF_A="0.13429"/>
      <bbk:Obs TIME_PERIOD="2006-11-30" OBS_VALUE="-0.3764" BBK_DIFF_A="0.31699"/>
      <bbk:Obs TIME_PERIOD="2006-11-29" OBS_VALUE="-0.69339" BBK_DIFF_A="0.08698"/>
      <bbk:Obs TIME_PERIOD="2006-11-28" OBS_VALUE="-0.78037" BBK_DIFF_A="0.07349"/>
      <bbk:Obs TIME_PERIOD="2006-11-27" OBS_VALUE="-0.85386" BBK_DIFF_A="-0.06292"/>
      <bbk:Obs TIME_PERIOD="2006-11-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-11-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-11-24" OBS_VALUE="-0.79094" BBK_DIFF_A="0.0726"/>
      <bbk:Obs TIME_PERIOD="2006-11-23" OBS_VALUE="-0.86354" BBK_DIFF_A="-0.04319"/>
      <bbk:Obs TIME_PERIOD="2006-11-22" OBS_VALUE="-0.82035" BBK_DIFF_A="0.13327"/>
      <bbk:Obs TIME_PERIOD="2006-11-21" OBS_VALUE="-0.95362" BBK_DIFF_A="-0.00673"/>
      <bbk:Obs TIME_PERIOD="2006-11-20" OBS_VALUE="-0.94689" BBK_DIFF_A="0.00699"/>
      <bbk:Obs TIME_PERIOD="2006-11-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-11-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-11-17" OBS_VALUE="-0.95388" BBK_DIFF_A="-0.11605"/>
      <bbk:Obs TIME_PERIOD="2006-11-16" OBS_VALUE="-0.83783" BBK_DIFF_A="0.18792"/>
      <bbk:Obs TIME_PERIOD="2006-11-15" OBS_VALUE="-1.02575" BBK_DIFF_A="-0.15117"/>
      <bbk:Obs TIME_PERIOD="2006-11-14" OBS_VALUE="-0.87458" BBK_DIFF_A="-0.06204"/>
      <bbk:Obs TIME_PERIOD="2006-11-13" OBS_VALUE="-0.81254" BBK_DIFF_A="0.15102"/>
      <bbk:Obs TIME_PERIOD="2006-11-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-11-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-11-10" OBS_VALUE="-0.96356" BBK_DIFF_A="7.9E-4"/>
      <bbk:Obs TIME_PERIOD="2006-11-09" OBS_VALUE="-0.96435" BBK_DIFF_A="-0.06926"/>
      <bbk:Obs TIME_PERIOD="2006-11-08" OBS_VALUE="-0.89509" BBK_DIFF_A="0.08162"/>
      <bbk:Obs TIME_PERIOD="2006-11-07" OBS_VALUE="-0.97671" BBK_DIFF_A="0.13981"/>
      <bbk:Obs TIME_PERIOD="2006-11-06" OBS_VALUE="-1.11652" BBK_DIFF_A="-0.04629"/>
      <bbk:Obs TIME_PERIOD="2006-11-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-11-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-11-03" OBS_VALUE="-1.07023" BBK_DIFF_A="-1.0702"/>
      <bbk:Obs TIME_PERIOD="2006-11-02" OBS_VALUE="-3.0E-5" BBK_DIFF_A="5.2E-4"/>
      <bbk:Obs TIME_PERIOD="2006-11-01" OBS_VALUE="-5.5E-4" BBK_DIFF_A="0.00818"/>
      <bbk:Obs TIME_PERIOD="2006-10-31" OBS_VALUE="-0.00873" BBK_DIFF_A="0.01176"/>
      <bbk:Obs TIME_PERIOD="2006-10-30" OBS_VALUE="-0.02049" BBK_DIFF_A="0.41272"/>
      <bbk:Obs TIME_PERIOD="2006-10-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-10-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-10-27" OBS_VALUE="-0.43321" BBK_DIFF_A="0.62984"/>
      <bbk:Obs TIME_PERIOD="2006-10-26" OBS_VALUE="-1.06305" BBK_DIFF_A="-0.07338"/>
      <bbk:Obs TIME_PERIOD="2006-10-25" OBS_VALUE="-0.98967" BBK_DIFF_A="-0.00659"/>
      <bbk:Obs TIME_PERIOD="2006-10-24" OBS_VALUE="-0.98308" BBK_DIFF_A="0.02114"/>
      <bbk:Obs TIME_PERIOD="2006-10-23" OBS_VALUE="-1.00422" BBK_DIFF_A="-0.00758"/>
      <bbk:Obs TIME_PERIOD="2006-10-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-10-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-10-20" OBS_VALUE="-0.99664" BBK_DIFF_A="0.01419"/>
      <bbk:Obs TIME_PERIOD="2006-10-19" OBS_VALUE="-1.01083" BBK_DIFF_A="-0.0324"/>
      <bbk:Obs TIME_PERIOD="2006-10-18" OBS_VALUE="-0.97843" BBK_DIFF_A="0.06355"/>
      <bbk:Obs TIME_PERIOD="2006-10-17" OBS_VALUE="-1.04198" BBK_DIFF_A="0.03128"/>
      <bbk:Obs TIME_PERIOD="2006-10-16" OBS_VALUE="-1.07326" BBK_DIFF_A="0.06061"/>
      <bbk:Obs TIME_PERIOD="2006-10-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-10-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-10-13" OBS_VALUE="-1.13387" BBK_DIFF_A="0.01969"/>
      <bbk:Obs TIME_PERIOD="2006-10-12" OBS_VALUE="-1.15356" BBK_DIFF_A="-0.05889"/>
      <bbk:Obs TIME_PERIOD="2006-10-11" OBS_VALUE="-1.09467" BBK_DIFF_A="0.01902"/>
      <bbk:Obs TIME_PERIOD="2006-10-10" OBS_VALUE="-1.11369" BBK_DIFF_A="-0.04334"/>
      <bbk:Obs TIME_PERIOD="2006-10-09" OBS_VALUE="-1.07035" BBK_DIFF_A="-0.06923"/>
      <bbk:Obs TIME_PERIOD="2006-10-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-10-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-10-06" OBS_VALUE="-1.00112" BBK_DIFF_A="0.08843"/>
      <bbk:Obs TIME_PERIOD="2006-10-05" OBS_VALUE="-1.08955" BBK_DIFF_A="-0.03956"/>
      <bbk:Obs TIME_PERIOD="2006-10-04" OBS_VALUE="-1.04999" BBK_DIFF_A="-0.0023"/>
      <bbk:Obs TIME_PERIOD="2006-10-03" OBS_VALUE="-1.04769" BBK_DIFF_A="0.13228"/>
      <bbk:Obs TIME_PERIOD="2006-10-02" OBS_VALUE="-1.17997" BBK_DIFF_A="-0.06245"/>
      <bbk:Obs TIME_PERIOD="2006-10-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-09-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-09-29" OBS_VALUE="-1.11752" BBK_DIFF_A="0.01596"/>
      <bbk:Obs TIME_PERIOD="2006-09-28" OBS_VALUE="-1.13348" BBK_DIFF_A="0.12181"/>
      <bbk:Obs TIME_PERIOD="2006-09-27" OBS_VALUE="-1.25529" BBK_DIFF_A="0.02487"/>
      <bbk:Obs TIME_PERIOD="2006-09-26" OBS_VALUE="-1.28016" BBK_DIFF_A="0.01071"/>
      <bbk:Obs TIME_PERIOD="2006-09-25" OBS_VALUE="-1.29087" BBK_DIFF_A="0.04934"/>
      <bbk:Obs TIME_PERIOD="2006-09-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-09-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-09-22" OBS_VALUE="-1.34021" BBK_DIFF_A="0.04667"/>
      <bbk:Obs TIME_PERIOD="2006-09-21" OBS_VALUE="-1.38688" BBK_DIFF_A="-0.01207"/>
      <bbk:Obs TIME_PERIOD="2006-09-20" OBS_VALUE="-1.37481" BBK_DIFF_A="-0.02489"/>
      <bbk:Obs TIME_PERIOD="2006-09-19" OBS_VALUE="-1.34992" BBK_DIFF_A="0.06391"/>
      <bbk:Obs TIME_PERIOD="2006-09-18" OBS_VALUE="-1.41383" BBK_DIFF_A="0.0042"/>
      <bbk:Obs TIME_PERIOD="2006-09-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-09-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-09-15" OBS_VALUE="-1.41803" BBK_DIFF_A="0.03981"/>
      <bbk:Obs TIME_PERIOD="2006-09-14" OBS_VALUE="-1.45784" BBK_DIFF_A="0.0327"/>
      <bbk:Obs TIME_PERIOD="2006-09-13" OBS_VALUE="-1.49054" BBK_DIFF_A="0.01155"/>
      <bbk:Obs TIME_PERIOD="2006-09-12" OBS_VALUE="-1.50209" BBK_DIFF_A="-0.01448"/>
      <bbk:Obs TIME_PERIOD="2006-09-11" OBS_VALUE="-1.48761" BBK_DIFF_A="-0.02894"/>
      <bbk:Obs TIME_PERIOD="2006-09-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-09-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-09-08" OBS_VALUE="-1.45867" BBK_DIFF_A="0.04523"/>
      <bbk:Obs TIME_PERIOD="2006-09-07" OBS_VALUE="-1.5039" BBK_DIFF_A="-0.00607"/>
      <bbk:Obs TIME_PERIOD="2006-09-06" OBS_VALUE="-1.49783" BBK_DIFF_A="0.03629"/>
      <bbk:Obs TIME_PERIOD="2006-09-05" OBS_VALUE="-1.53412" BBK_DIFF_A="-0.00418"/>
      <bbk:Obs TIME_PERIOD="2006-09-04" OBS_VALUE="-1.52994" BBK_DIFF_A="0.001"/>
      <bbk:Obs TIME_PERIOD="2006-09-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-09-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-09-01" OBS_VALUE="-1.53094" BBK_DIFF_A="-0.01312"/>
      <bbk:Obs TIME_PERIOD="2006-08-31" OBS_VALUE="-1.51782" BBK_DIFF_A="0.0137"/>
      <bbk:Obs TIME_PERIOD="2006-08-30" OBS_VALUE="-1.53152" BBK_DIFF_A="-0.02253"/>
      <bbk:Obs TIME_PERIOD="2006-08-29" OBS_VALUE="-1.50899" BBK_DIFF_A="-0.04257"/>
      <bbk:Obs TIME_PERIOD="2006-08-28" OBS_VALUE="-1.46642" BBK_DIFF_A="0.02326"/>
      <bbk:Obs TIME_PERIOD="2006-08-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-08-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-08-25" OBS_VALUE="-1.48968" BBK_DIFF_A="0.01419"/>
      <bbk:Obs TIME_PERIOD="2006-08-24" OBS_VALUE="-1.50387" BBK_DIFF_A="0.05835"/>
      <bbk:Obs TIME_PERIOD="2006-08-23" OBS_VALUE="-1.56222" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2006-08-22" OBS_VALUE="-1.56222" BBK_DIFF_A="0.04933"/>
      <bbk:Obs TIME_PERIOD="2006-08-21" OBS_VALUE="-1.61155" BBK_DIFF_A="0.05387"/>
      <bbk:Obs TIME_PERIOD="2006-08-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-08-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-08-18" OBS_VALUE="-1.66542" BBK_DIFF_A="-0.02491"/>
      <bbk:Obs TIME_PERIOD="2006-08-17" OBS_VALUE="-1.64051" BBK_DIFF_A="0.06859"/>
      <bbk:Obs TIME_PERIOD="2006-08-16" OBS_VALUE="-1.7091" BBK_DIFF_A="0.03573"/>
      <bbk:Obs TIME_PERIOD="2006-08-15" OBS_VALUE="-1.74483" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2006-08-14" OBS_VALUE="-1.74483" BBK_DIFF_A="-0.07817"/>
      <bbk:Obs TIME_PERIOD="2006-08-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-08-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-08-11" OBS_VALUE="-1.66666" BBK_DIFF_A="-0.0106"/>
      <bbk:Obs TIME_PERIOD="2006-08-10" OBS_VALUE="-1.65606" BBK_DIFF_A="0.0269"/>
      <bbk:Obs TIME_PERIOD="2006-08-09" OBS_VALUE="-1.68296" BBK_DIFF_A="-0.0269"/>
      <bbk:Obs TIME_PERIOD="2006-08-08" OBS_VALUE="-1.65606" BBK_DIFF_A="0.00346"/>
      <bbk:Obs TIME_PERIOD="2006-08-07" OBS_VALUE="-1.65952" BBK_DIFF_A="0.03718"/>
      <bbk:Obs TIME_PERIOD="2006-08-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-08-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-08-04" OBS_VALUE="-1.6967" BBK_DIFF_A="0.03699"/>
      <bbk:Obs TIME_PERIOD="2006-08-03" OBS_VALUE="-1.73369" BBK_DIFF_A="0.00645"/>
      <bbk:Obs TIME_PERIOD="2006-08-02" OBS_VALUE="-1.74014" BBK_DIFF_A="0.01545"/>
      <bbk:Obs TIME_PERIOD="2006-08-01" OBS_VALUE="-1.75559" BBK_DIFF_A="0.03858"/>
      <bbk:Obs TIME_PERIOD="2006-07-31" OBS_VALUE="-1.79417" BBK_DIFF_A="0.02693"/>
      <bbk:Obs TIME_PERIOD="2006-07-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-07-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-07-28" OBS_VALUE="-1.8211" BBK_DIFF_A="-0.00601"/>
      <bbk:Obs TIME_PERIOD="2006-07-27" OBS_VALUE="-1.81509" BBK_DIFF_A="0.07221"/>
      <bbk:Obs TIME_PERIOD="2006-07-26" OBS_VALUE="-1.8873" BBK_DIFF_A="-0.12881"/>
      <bbk:Obs TIME_PERIOD="2006-07-25" OBS_VALUE="-1.75849" BBK_DIFF_A="0.07698"/>
      <bbk:Obs TIME_PERIOD="2006-07-24" OBS_VALUE="-1.83547" BBK_DIFF_A="0.06139"/>
      <bbk:Obs TIME_PERIOD="2006-07-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-07-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-07-21" OBS_VALUE="-1.89686" BBK_DIFF_A="0.0788"/>
      <bbk:Obs TIME_PERIOD="2006-07-20" OBS_VALUE="-1.97566" BBK_DIFF_A="-0.01166"/>
      <bbk:Obs TIME_PERIOD="2006-07-19" OBS_VALUE="-1.964" BBK_DIFF_A="7.2E-4"/>
      <bbk:Obs TIME_PERIOD="2006-07-18" OBS_VALUE="-1.96472" BBK_DIFF_A="0.02022"/>
      <bbk:Obs TIME_PERIOD="2006-07-17" OBS_VALUE="-1.98494" BBK_DIFF_A="-0.00309"/>
      <bbk:Obs TIME_PERIOD="2006-07-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-07-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-07-14" OBS_VALUE="-1.98185" BBK_DIFF_A="0.07949"/>
      <bbk:Obs TIME_PERIOD="2006-07-13" OBS_VALUE="-2.06134" BBK_DIFF_A="0.05952"/>
      <bbk:Obs TIME_PERIOD="2006-07-12" OBS_VALUE="-2.12086" BBK_DIFF_A="-0.02441"/>
      <bbk:Obs TIME_PERIOD="2006-07-11" OBS_VALUE="-2.09645" BBK_DIFF_A="-0.01165"/>
      <bbk:Obs TIME_PERIOD="2006-07-10" OBS_VALUE="-2.0848" BBK_DIFF_A="0.00652"/>
      <bbk:Obs TIME_PERIOD="2006-07-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-07-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-07-07" OBS_VALUE="-2.09132" BBK_DIFF_A="0.03544"/>
      <bbk:Obs TIME_PERIOD="2006-07-06" OBS_VALUE="-2.12676" BBK_DIFF_A="0.02152"/>
      <bbk:Obs TIME_PERIOD="2006-07-05" OBS_VALUE="-2.14828" BBK_DIFF_A="-0.05755"/>
      <bbk:Obs TIME_PERIOD="2006-07-04" OBS_VALUE="-2.09073" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2006-07-03" OBS_VALUE="-2.09073" BBK_DIFF_A="0.04945"/>
      <bbk:Obs TIME_PERIOD="2006-07-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-07-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-06-30" OBS_VALUE="-2.14018" BBK_DIFF_A="-0.06141"/>
      <bbk:Obs TIME_PERIOD="2006-06-29" OBS_VALUE="-2.07877" BBK_DIFF_A="0.01112"/>
      <bbk:Obs TIME_PERIOD="2006-06-28" OBS_VALUE="-2.08989" BBK_DIFF_A="-0.01195"/>
      <bbk:Obs TIME_PERIOD="2006-06-27" OBS_VALUE="-2.07794" BBK_DIFF_A="0.04054"/>
      <bbk:Obs TIME_PERIOD="2006-06-26" OBS_VALUE="-2.11848" BBK_DIFF_A="-0.07952"/>
      <bbk:Obs TIME_PERIOD="2006-06-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-06-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-06-23" OBS_VALUE="-2.03896" BBK_DIFF_A="-0.03456"/>
      <bbk:Obs TIME_PERIOD="2006-06-22" OBS_VALUE="-2.0044" BBK_DIFF_A="-0.05711"/>
      <bbk:Obs TIME_PERIOD="2006-06-21" OBS_VALUE="-1.94729" BBK_DIFF_A="-0.04207"/>
      <bbk:Obs TIME_PERIOD="2006-06-20" OBS_VALUE="-1.90522" BBK_DIFF_A="-0.54231"/>
      <bbk:Obs TIME_PERIOD="2006-06-19" OBS_VALUE="-1.36291" BBK_DIFF_A="0.0367"/>
      <bbk:Obs TIME_PERIOD="2006-06-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-06-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-06-16" OBS_VALUE="-1.39961" BBK_DIFF_A="0.52392"/>
      <bbk:Obs TIME_PERIOD="2006-06-15" OBS_VALUE="-1.92353" BBK_DIFF_A="-0.0597"/>
      <bbk:Obs TIME_PERIOD="2006-06-14" OBS_VALUE="-1.86383" BBK_DIFF_A="0.00231"/>
      <bbk:Obs TIME_PERIOD="2006-06-13" OBS_VALUE="-1.86614" BBK_DIFF_A="0.06688"/>
      <bbk:Obs TIME_PERIOD="2006-06-12" OBS_VALUE="-1.93302" BBK_DIFF_A="0.05734"/>
      <bbk:Obs TIME_PERIOD="2006-06-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-06-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-06-09" OBS_VALUE="-1.99036" BBK_DIFF_A="-0.04993"/>
      <bbk:Obs TIME_PERIOD="2006-06-08" OBS_VALUE="-1.94043" BBK_DIFF_A="0.04483"/>
      <bbk:Obs TIME_PERIOD="2006-06-07" OBS_VALUE="-1.98526" BBK_DIFF_A="-0.01293"/>
      <bbk:Obs TIME_PERIOD="2006-06-06" OBS_VALUE="-1.97233" BBK_DIFF_A="-0.04614"/>
      <bbk:Obs TIME_PERIOD="2006-06-05" OBS_VALUE="-1.92619" BBK_DIFF_A="0.07999"/>
      <bbk:Obs TIME_PERIOD="2006-06-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-06-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-06-02" OBS_VALUE="-2.00618" BBK_DIFF_A="0.01379"/>
      <bbk:Obs TIME_PERIOD="2006-06-01" OBS_VALUE="-2.01997" BBK_DIFF_A="0.01874"/>
      <bbk:Obs TIME_PERIOD="2006-05-31" OBS_VALUE="-2.03871" BBK_DIFF_A="-0.05616"/>
      <bbk:Obs TIME_PERIOD="2006-05-30" OBS_VALUE="-1.98255" BBK_DIFF_A="-0.00943"/>
      <bbk:Obs TIME_PERIOD="2006-05-29" OBS_VALUE="-1.97312" BBK_DIFF_A="-0.01248"/>
      <bbk:Obs TIME_PERIOD="2006-05-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-05-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-05-26" OBS_VALUE="-1.96064" BBK_DIFF_A="0.01105"/>
      <bbk:Obs TIME_PERIOD="2006-05-25" OBS_VALUE="-1.97169" BBK_DIFF_A="0.00627"/>
      <bbk:Obs TIME_PERIOD="2006-05-24" OBS_VALUE="-1.97796" BBK_DIFF_A="-0.00578"/>
      <bbk:Obs TIME_PERIOD="2006-05-23" OBS_VALUE="-1.97218" BBK_DIFF_A="0.03613"/>
      <bbk:Obs TIME_PERIOD="2006-05-22" OBS_VALUE="-2.00831" BBK_DIFF_A="0.09371"/>
      <bbk:Obs TIME_PERIOD="2006-05-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-05-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-05-19" OBS_VALUE="-2.10202" BBK_DIFF_A="0.07115"/>
      <bbk:Obs TIME_PERIOD="2006-05-18" OBS_VALUE="-2.17317" BBK_DIFF_A="-0.087"/>
      <bbk:Obs TIME_PERIOD="2006-05-17" OBS_VALUE="-2.08617" BBK_DIFF_A="-0.01191"/>
      <bbk:Obs TIME_PERIOD="2006-05-16" OBS_VALUE="-2.07426" BBK_DIFF_A="0.0704"/>
      <bbk:Obs TIME_PERIOD="2006-05-15" OBS_VALUE="-2.14466" BBK_DIFF_A="-0.02655"/>
      <bbk:Obs TIME_PERIOD="2006-05-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-05-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-05-12" OBS_VALUE="-2.11811" BBK_DIFF_A="-0.05887"/>
      <bbk:Obs TIME_PERIOD="2006-05-11" OBS_VALUE="-2.05924" BBK_DIFF_A="0.00483"/>
      <bbk:Obs TIME_PERIOD="2006-05-10" OBS_VALUE="-2.06407" BBK_DIFF_A="0.02374"/>
      <bbk:Obs TIME_PERIOD="2006-05-09" OBS_VALUE="-2.08781" BBK_DIFF_A="-0.04355"/>
      <bbk:Obs TIME_PERIOD="2006-05-08" OBS_VALUE="-2.04426" BBK_DIFF_A="0.06966"/>
      <bbk:Obs TIME_PERIOD="2006-05-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-05-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-05-05" OBS_VALUE="-2.11392" BBK_DIFF_A="-0.08332"/>
      <bbk:Obs TIME_PERIOD="2006-05-04" OBS_VALUE="-2.0306" BBK_DIFF_A="-0.05579"/>
      <bbk:Obs TIME_PERIOD="2006-05-03" OBS_VALUE="-1.97481" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2006-05-02" OBS_VALUE="-1.97481" BBK_DIFF_A="0.04529"/>
      <bbk:Obs TIME_PERIOD="2006-05-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-04-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-04-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-04-28" OBS_VALUE="-2.0201" BBK_DIFF_A="0.05275"/>
      <bbk:Obs TIME_PERIOD="2006-04-27" OBS_VALUE="-2.07285" BBK_DIFF_A="-0.03224"/>
      <bbk:Obs TIME_PERIOD="2006-04-26" OBS_VALUE="-2.04061" BBK_DIFF_A="0.05775"/>
      <bbk:Obs TIME_PERIOD="2006-04-25" OBS_VALUE="-2.09836" BBK_DIFF_A="-0.02275"/>
      <bbk:Obs TIME_PERIOD="2006-04-24" OBS_VALUE="-2.07561" BBK_DIFF_A="-0.01008"/>
      <bbk:Obs TIME_PERIOD="2006-04-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-04-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-04-21" OBS_VALUE="-2.06553" BBK_DIFF_A="0.02014"/>
      <bbk:Obs TIME_PERIOD="2006-04-20" OBS_VALUE="-2.08567" BBK_DIFF_A="-0.00558"/>
      <bbk:Obs TIME_PERIOD="2006-04-19" OBS_VALUE="-2.08009" BBK_DIFF_A="0.00938"/>
      <bbk:Obs TIME_PERIOD="2006-04-18" OBS_VALUE="-2.08947" BBK_DIFF_A="-0.04088"/>
      <bbk:Obs TIME_PERIOD="2006-04-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-04-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-04-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-04-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-04-13" OBS_VALUE="-2.04859" BBK_DIFF_A="-0.10696"/>
      <bbk:Obs TIME_PERIOD="2006-04-12" OBS_VALUE="-1.94163" BBK_DIFF_A="0.09627"/>
      <bbk:Obs TIME_PERIOD="2006-04-11" OBS_VALUE="-2.0379" BBK_DIFF_A="0.05438"/>
      <bbk:Obs TIME_PERIOD="2006-04-10" OBS_VALUE="-2.09228" BBK_DIFF_A="-0.04323"/>
      <bbk:Obs TIME_PERIOD="2006-04-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-04-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-04-07" OBS_VALUE="-2.04905" BBK_DIFF_A="-0.12438"/>
      <bbk:Obs TIME_PERIOD="2006-04-06" OBS_VALUE="-1.92467" BBK_DIFF_A="-0.09237"/>
      <bbk:Obs TIME_PERIOD="2006-04-05" OBS_VALUE="-1.8323" BBK_DIFF_A="-0.01256"/>
      <bbk:Obs TIME_PERIOD="2006-04-04" OBS_VALUE="-1.81974" BBK_DIFF_A="-0.01308"/>
      <bbk:Obs TIME_PERIOD="2006-04-03" OBS_VALUE="-1.80666" BBK_DIFF_A="-0.01106"/>
      <bbk:Obs TIME_PERIOD="2006-04-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-04-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-03-31" OBS_VALUE="-1.7956" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2006-03-30" OBS_VALUE="-1.7956" BBK_DIFF_A="-0.04775"/>
      <bbk:Obs TIME_PERIOD="2006-03-29" OBS_VALUE="-1.74785" BBK_DIFF_A="-0.04878"/>
      <bbk:Obs TIME_PERIOD="2006-03-28" OBS_VALUE="-1.69907" BBK_DIFF_A="-0.03412"/>
      <bbk:Obs TIME_PERIOD="2006-03-27" OBS_VALUE="-1.66495" BBK_DIFF_A="0.05179"/>
      <bbk:Obs TIME_PERIOD="2006-03-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-03-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-03-24" OBS_VALUE="-1.71674" BBK_DIFF_A="-0.02762"/>
      <bbk:Obs TIME_PERIOD="2006-03-23" OBS_VALUE="-1.68912" BBK_DIFF_A="-0.00209"/>
      <bbk:Obs TIME_PERIOD="2006-03-22" OBS_VALUE="-1.68703" BBK_DIFF_A="-0.01564"/>
      <bbk:Obs TIME_PERIOD="2006-03-21" OBS_VALUE="-1.67139" BBK_DIFF_A="0.12296"/>
      <bbk:Obs TIME_PERIOD="2006-03-20" OBS_VALUE="-1.79435" BBK_DIFF_A="-0.00865"/>
      <bbk:Obs TIME_PERIOD="2006-03-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-03-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-03-17" OBS_VALUE="-1.7857" BBK_DIFF_A="0.09664"/>
      <bbk:Obs TIME_PERIOD="2006-03-16" OBS_VALUE="-1.88234" BBK_DIFF_A="-0.04879"/>
      <bbk:Obs TIME_PERIOD="2006-03-15" OBS_VALUE="-1.83355" BBK_DIFF_A="0.02174"/>
      <bbk:Obs TIME_PERIOD="2006-03-14" OBS_VALUE="-1.85529" BBK_DIFF_A="0.02159"/>
      <bbk:Obs TIME_PERIOD="2006-03-13" OBS_VALUE="-1.87688" BBK_DIFF_A="-0.00352"/>
      <bbk:Obs TIME_PERIOD="2006-03-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-03-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-03-10" OBS_VALUE="-1.87336" BBK_DIFF_A="-0.05701"/>
      <bbk:Obs TIME_PERIOD="2006-03-09" OBS_VALUE="-1.81635" BBK_DIFF_A="-0.10227"/>
      <bbk:Obs TIME_PERIOD="2006-03-08" OBS_VALUE="-1.71408" BBK_DIFF_A="-0.05472"/>
      <bbk:Obs TIME_PERIOD="2006-03-07" OBS_VALUE="-1.65936" BBK_DIFF_A="-0.06848"/>
      <bbk:Obs TIME_PERIOD="2006-03-06" OBS_VALUE="-1.59088" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2006-03-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-03-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-03-03" OBS_VALUE="-1.59088" BBK_DIFF_A="-0.02144"/>
      <bbk:Obs TIME_PERIOD="2006-03-02" OBS_VALUE="-1.56944" BBK_DIFF_A="0.07119"/>
      <bbk:Obs TIME_PERIOD="2006-03-01" OBS_VALUE="-1.64063" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2006-02-28" OBS_VALUE="-1.64063" BBK_DIFF_A="0.01278"/>
      <bbk:Obs TIME_PERIOD="2006-02-27" OBS_VALUE="-1.65341" BBK_DIFF_A="-0.02627"/>
      <bbk:Obs TIME_PERIOD="2006-02-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-02-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-02-24" OBS_VALUE="-1.62714" BBK_DIFF_A="0.00178"/>
      <bbk:Obs TIME_PERIOD="2006-02-23" OBS_VALUE="-1.62892" BBK_DIFF_A="-0.0617"/>
      <bbk:Obs TIME_PERIOD="2006-02-22" OBS_VALUE="-1.56722" BBK_DIFF_A="0.03032"/>
      <bbk:Obs TIME_PERIOD="2006-02-21" OBS_VALUE="-1.59754" BBK_DIFF_A="-0.01308"/>
      <bbk:Obs TIME_PERIOD="2006-02-20" OBS_VALUE="-1.58446" BBK_DIFF_A="0.07877"/>
      <bbk:Obs TIME_PERIOD="2006-02-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-02-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-02-17" OBS_VALUE="-1.66323" BBK_DIFF_A="0.04465"/>
      <bbk:Obs TIME_PERIOD="2006-02-16" OBS_VALUE="-1.70788" BBK_DIFF_A="-0.04582"/>
      <bbk:Obs TIME_PERIOD="2006-02-15" OBS_VALUE="-1.66206" BBK_DIFF_A="-0.03272"/>
      <bbk:Obs TIME_PERIOD="2006-02-14" OBS_VALUE="-1.62934" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2006-02-13" OBS_VALUE="-1.62934" BBK_DIFF_A="-0.03253"/>
      <bbk:Obs TIME_PERIOD="2006-02-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-02-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-02-10" OBS_VALUE="-1.59681" BBK_DIFF_A="0.07256"/>
      <bbk:Obs TIME_PERIOD="2006-02-09" OBS_VALUE="-1.66937" BBK_DIFF_A="0.03133"/>
      <bbk:Obs TIME_PERIOD="2006-02-08" OBS_VALUE="-1.7007" BBK_DIFF_A="-0.00124"/>
      <bbk:Obs TIME_PERIOD="2006-02-07" OBS_VALUE="-1.69946" BBK_DIFF_A="-0.07031"/>
      <bbk:Obs TIME_PERIOD="2006-02-06" OBS_VALUE="-1.62915" BBK_DIFF_A="0.0368"/>
      <bbk:Obs TIME_PERIOD="2006-02-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-02-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-02-03" OBS_VALUE="-1.66595" BBK_DIFF_A="0.03996"/>
      <bbk:Obs TIME_PERIOD="2006-02-02" OBS_VALUE="-1.70591" BBK_DIFF_A="-0.0391"/>
      <bbk:Obs TIME_PERIOD="2006-02-01" OBS_VALUE="-1.66681" BBK_DIFF_A="0.03908"/>
      <bbk:Obs TIME_PERIOD="2006-01-31" OBS_VALUE="-1.70589" BBK_DIFF_A="0.06201"/>
      <bbk:Obs TIME_PERIOD="2006-01-30" OBS_VALUE="-1.7679" BBK_DIFF_A="0.00504"/>
      <bbk:Obs TIME_PERIOD="2006-01-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-01-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-01-27" OBS_VALUE="-1.77294" BBK_DIFF_A="-0.01517"/>
      <bbk:Obs TIME_PERIOD="2006-01-26" OBS_VALUE="-1.75777" BBK_DIFF_A="-0.12405"/>
      <bbk:Obs TIME_PERIOD="2006-01-25" OBS_VALUE="-1.63372" BBK_DIFF_A="-0.02376"/>
      <bbk:Obs TIME_PERIOD="2006-01-24" OBS_VALUE="-1.60996" BBK_DIFF_A="0.00187"/>
      <bbk:Obs TIME_PERIOD="2006-01-23" OBS_VALUE="-1.61183" BBK_DIFF_A="0.0082"/>
      <bbk:Obs TIME_PERIOD="2006-01-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-01-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-01-20" OBS_VALUE="-1.62003" BBK_DIFF_A="-0.08691"/>
      <bbk:Obs TIME_PERIOD="2006-01-19" OBS_VALUE="-1.53312" BBK_DIFF_A="-0.01424"/>
      <bbk:Obs TIME_PERIOD="2006-01-18" OBS_VALUE="-1.51888" BBK_DIFF_A="0.04232"/>
      <bbk:Obs TIME_PERIOD="2006-01-17" OBS_VALUE="-1.5612" BBK_DIFF_A="0.02166"/>
      <bbk:Obs TIME_PERIOD="2006-01-16" OBS_VALUE="-1.58286" BBK_DIFF_A="-0.13836"/>
      <bbk:Obs TIME_PERIOD="2006-01-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-01-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-01-13" OBS_VALUE="-1.4445" BBK_DIFF_A="-0.28262"/>
      <bbk:Obs TIME_PERIOD="2006-01-12" OBS_VALUE="-1.16188" BBK_DIFF_A="0.17648"/>
      <bbk:Obs TIME_PERIOD="2006-01-11" OBS_VALUE="-1.33836" BBK_DIFF_A="0.0886"/>
      <bbk:Obs TIME_PERIOD="2006-01-10" OBS_VALUE="-1.42696" BBK_DIFF_A="0.13794"/>
      <bbk:Obs TIME_PERIOD="2006-01-09" OBS_VALUE="-1.5649" BBK_DIFF_A="0.11016"/>
      <bbk:Obs TIME_PERIOD="2006-01-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-01-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2006-01-06" OBS_VALUE="-1.67506" BBK_DIFF_A="-0.01801"/>
      <bbk:Obs TIME_PERIOD="2006-01-05" OBS_VALUE="-1.65705" BBK_DIFF_A="0.0113"/>
      <bbk:Obs TIME_PERIOD="2006-01-04" OBS_VALUE="-1.66835" BBK_DIFF_A="0.08993"/>
      <bbk:Obs TIME_PERIOD="2006-01-03" OBS_VALUE="-1.75828" BBK_DIFF_A="-0.42765"/>
      <bbk:Obs TIME_PERIOD="2006-01-02" OBS_VALUE="-1.33063" BBK_DIFF_A="0.03"/>
      <bbk:Obs TIME_PERIOD="2006-01-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-12-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-12-30" OBS_VALUE="-1.36063" BBK_DIFF_A="0.13604"/>
      <bbk:Obs TIME_PERIOD="2005-12-29" OBS_VALUE="-1.49667" BBK_DIFF_A="0.25531"/>
      <bbk:Obs TIME_PERIOD="2005-12-28" OBS_VALUE="-1.75198" BBK_DIFF_A="0.00713"/>
      <bbk:Obs TIME_PERIOD="2005-12-27" OBS_VALUE="-1.75911" BBK_DIFF_A="-0.20396"/>
      <bbk:Obs TIME_PERIOD="2005-12-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-12-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-12-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-12-23" OBS_VALUE="-1.55515" BBK_DIFF_A="0.07083"/>
      <bbk:Obs TIME_PERIOD="2005-12-22" OBS_VALUE="-1.62598" BBK_DIFF_A="0.12893"/>
      <bbk:Obs TIME_PERIOD="2005-12-21" OBS_VALUE="-1.75491" BBK_DIFF_A="-0.05238"/>
      <bbk:Obs TIME_PERIOD="2005-12-20" OBS_VALUE="-1.70253" BBK_DIFF_A="0.10987"/>
      <bbk:Obs TIME_PERIOD="2005-12-19" OBS_VALUE="-1.8124" BBK_DIFF_A="-0.06453"/>
      <bbk:Obs TIME_PERIOD="2005-12-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-12-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-12-16" OBS_VALUE="-1.74787" BBK_DIFF_A="-0.01941"/>
      <bbk:Obs TIME_PERIOD="2005-12-15" OBS_VALUE="-1.72846" BBK_DIFF_A="0.14203"/>
      <bbk:Obs TIME_PERIOD="2005-12-14" OBS_VALUE="-1.87049" BBK_DIFF_A="0.054"/>
      <bbk:Obs TIME_PERIOD="2005-12-13" OBS_VALUE="-1.92449" BBK_DIFF_A="-0.02996"/>
      <bbk:Obs TIME_PERIOD="2005-12-12" OBS_VALUE="-1.89453" BBK_DIFF_A="0.03759"/>
      <bbk:Obs TIME_PERIOD="2005-12-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-12-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-12-09" OBS_VALUE="-1.93212" BBK_DIFF_A="-0.01391"/>
      <bbk:Obs TIME_PERIOD="2005-12-08" OBS_VALUE="-1.91821" BBK_DIFF_A="0.12486"/>
      <bbk:Obs TIME_PERIOD="2005-12-07" OBS_VALUE="-2.04307" BBK_DIFF_A="0.05284"/>
      <bbk:Obs TIME_PERIOD="2005-12-06" OBS_VALUE="-2.09591" BBK_DIFF_A="-0.34394"/>
      <bbk:Obs TIME_PERIOD="2005-12-05" OBS_VALUE="-1.75197" BBK_DIFF_A="0.24554"/>
      <bbk:Obs TIME_PERIOD="2005-12-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-12-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-12-02" OBS_VALUE="-1.99751" BBK_DIFF_A="-0.35854"/>
      <bbk:Obs TIME_PERIOD="2005-12-01" OBS_VALUE="-1.63897" BBK_DIFF_A="0.25844"/>
      <bbk:Obs TIME_PERIOD="2005-11-30" OBS_VALUE="-1.89741" BBK_DIFF_A="-0.07667"/>
      <bbk:Obs TIME_PERIOD="2005-11-29" OBS_VALUE="-1.82074" BBK_DIFF_A="0.26272"/>
      <bbk:Obs TIME_PERIOD="2005-11-28" OBS_VALUE="-2.08346" BBK_DIFF_A="-0.7903"/>
      <bbk:Obs TIME_PERIOD="2005-11-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-11-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-11-25" OBS_VALUE="-1.29316" BBK_DIFF_A="0.69307"/>
      <bbk:Obs TIME_PERIOD="2005-11-24" OBS_VALUE="-1.98623" BBK_DIFF_A="0.07905"/>
      <bbk:Obs TIME_PERIOD="2005-11-23" OBS_VALUE="-2.06528" BBK_DIFF_A="-0.08208"/>
      <bbk:Obs TIME_PERIOD="2005-11-22" OBS_VALUE="-1.9832" BBK_DIFF_A="0.00863"/>
      <bbk:Obs TIME_PERIOD="2005-11-21" OBS_VALUE="-1.99183" BBK_DIFF_A="0.17449"/>
      <bbk:Obs TIME_PERIOD="2005-11-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-11-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-11-18" OBS_VALUE="-2.16632" BBK_DIFF_A="-0.00582"/>
      <bbk:Obs TIME_PERIOD="2005-11-17" OBS_VALUE="-2.1605" BBK_DIFF_A="0.03237"/>
      <bbk:Obs TIME_PERIOD="2005-11-16" OBS_VALUE="-2.19287" BBK_DIFF_A="-0.05784"/>
      <bbk:Obs TIME_PERIOD="2005-11-15" OBS_VALUE="-2.13503" BBK_DIFF_A="-0.02694"/>
      <bbk:Obs TIME_PERIOD="2005-11-14" OBS_VALUE="-2.10809" BBK_DIFF_A="0.04572"/>
      <bbk:Obs TIME_PERIOD="2005-11-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-11-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-11-11" OBS_VALUE="-2.15381" BBK_DIFF_A="-0.02296"/>
      <bbk:Obs TIME_PERIOD="2005-11-10" OBS_VALUE="-2.13085" BBK_DIFF_A="-0.0044"/>
      <bbk:Obs TIME_PERIOD="2005-11-09" OBS_VALUE="-2.12645" BBK_DIFF_A="0.01483"/>
      <bbk:Obs TIME_PERIOD="2005-11-08" OBS_VALUE="-2.14128" BBK_DIFF_A="0.14573"/>
      <bbk:Obs TIME_PERIOD="2005-11-07" OBS_VALUE="-2.28701" BBK_DIFF_A="0.04122"/>
      <bbk:Obs TIME_PERIOD="2005-11-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-11-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-11-04" OBS_VALUE="-2.32823" BBK_DIFF_A="-0.00428"/>
      <bbk:Obs TIME_PERIOD="2005-11-03" OBS_VALUE="-2.32395" BBK_DIFF_A="0.0182"/>
      <bbk:Obs TIME_PERIOD="2005-11-02" OBS_VALUE="-2.34215" BBK_DIFF_A="-0.1676"/>
      <bbk:Obs TIME_PERIOD="2005-11-01" OBS_VALUE="-2.17455" BBK_DIFF_A="0.02487"/>
      <bbk:Obs TIME_PERIOD="2005-10-31" OBS_VALUE="-2.19942" BBK_DIFF_A="2.4E-4"/>
      <bbk:Obs TIME_PERIOD="2005-10-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-10-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-10-28" OBS_VALUE="-2.19966" BBK_DIFF_A="0.0656"/>
      <bbk:Obs TIME_PERIOD="2005-10-27" OBS_VALUE="-2.26526" BBK_DIFF_A="-0.01028"/>
      <bbk:Obs TIME_PERIOD="2005-10-26" OBS_VALUE="-2.25498" BBK_DIFF_A="-0.02838"/>
      <bbk:Obs TIME_PERIOD="2005-10-25" OBS_VALUE="-2.2266" BBK_DIFF_A="1.08259"/>
      <bbk:Obs TIME_PERIOD="2005-10-24" OBS_VALUE="-3.30919" BBK_DIFF_A="-1.06643"/>
      <bbk:Obs TIME_PERIOD="2005-10-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-10-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-10-21" OBS_VALUE="-2.24276" BBK_DIFF_A="0.0256"/>
      <bbk:Obs TIME_PERIOD="2005-10-20" OBS_VALUE="-2.26836" BBK_DIFF_A="0.25484"/>
      <bbk:Obs TIME_PERIOD="2005-10-19" OBS_VALUE="-2.5232" BBK_DIFF_A="-0.17912"/>
      <bbk:Obs TIME_PERIOD="2005-10-18" OBS_VALUE="-2.34408" BBK_DIFF_A="-0.0527"/>
      <bbk:Obs TIME_PERIOD="2005-10-17" OBS_VALUE="-2.29138" BBK_DIFF_A="0.0447"/>
      <bbk:Obs TIME_PERIOD="2005-10-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-10-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-10-14" OBS_VALUE="-2.33608" BBK_DIFF_A="-0.02073"/>
      <bbk:Obs TIME_PERIOD="2005-10-13" OBS_VALUE="-2.31535" BBK_DIFF_A="-0.04729"/>
      <bbk:Obs TIME_PERIOD="2005-10-12" OBS_VALUE="-2.26806" BBK_DIFF_A="-0.02199"/>
      <bbk:Obs TIME_PERIOD="2005-10-11" OBS_VALUE="-2.24607" BBK_DIFF_A="-0.90219"/>
      <bbk:Obs TIME_PERIOD="2005-10-10" OBS_VALUE="-1.34388" BBK_DIFF_A="0.91513"/>
      <bbk:Obs TIME_PERIOD="2005-10-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-10-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-10-07" OBS_VALUE="-2.25901" BBK_DIFF_A="0.04413"/>
      <bbk:Obs TIME_PERIOD="2005-10-06" OBS_VALUE="-2.30314" BBK_DIFF_A="-0.11557"/>
      <bbk:Obs TIME_PERIOD="2005-10-05" OBS_VALUE="-2.18757" BBK_DIFF_A="0.04375"/>
      <bbk:Obs TIME_PERIOD="2005-10-04" OBS_VALUE="-2.23132" BBK_DIFF_A="-0.03312"/>
      <bbk:Obs TIME_PERIOD="2005-10-03" OBS_VALUE="-2.1982" BBK_DIFF_A="-0.06706"/>
      <bbk:Obs TIME_PERIOD="2005-10-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-10-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-09-30" OBS_VALUE="-2.13114" BBK_DIFF_A="-0.09299"/>
      <bbk:Obs TIME_PERIOD="2005-09-29" OBS_VALUE="-2.03815" BBK_DIFF_A="0.22374"/>
      <bbk:Obs TIME_PERIOD="2005-09-28" OBS_VALUE="-2.26189" BBK_DIFF_A="0.07332"/>
      <bbk:Obs TIME_PERIOD="2005-09-27" OBS_VALUE="-2.33521" BBK_DIFF_A="-1.0234"/>
      <bbk:Obs TIME_PERIOD="2005-09-26" OBS_VALUE="-1.31181" BBK_DIFF_A="0.79725"/>
      <bbk:Obs TIME_PERIOD="2005-09-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-09-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-09-23" OBS_VALUE="-2.10906" BBK_DIFF_A="-0.05265"/>
      <bbk:Obs TIME_PERIOD="2005-09-22" OBS_VALUE="-2.05641" BBK_DIFF_A="-0.05494"/>
      <bbk:Obs TIME_PERIOD="2005-09-21" OBS_VALUE="-2.00147" BBK_DIFF_A="0.13333"/>
      <bbk:Obs TIME_PERIOD="2005-09-20" OBS_VALUE="-2.1348" BBK_DIFF_A="0.10229"/>
      <bbk:Obs TIME_PERIOD="2005-09-19" OBS_VALUE="-2.23709" BBK_DIFF_A="0.01512"/>
      <bbk:Obs TIME_PERIOD="2005-09-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-09-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-09-16" OBS_VALUE="-2.25221" BBK_DIFF_A="-0.08453"/>
      <bbk:Obs TIME_PERIOD="2005-09-15" OBS_VALUE="-2.16768" BBK_DIFF_A="0.05831"/>
      <bbk:Obs TIME_PERIOD="2005-09-14" OBS_VALUE="-2.22599" BBK_DIFF_A="0.12123"/>
      <bbk:Obs TIME_PERIOD="2005-09-13" OBS_VALUE="-2.34722" BBK_DIFF_A="-0.20974"/>
      <bbk:Obs TIME_PERIOD="2005-09-12" OBS_VALUE="-2.13748" BBK_DIFF_A="-0.11687"/>
      <bbk:Obs TIME_PERIOD="2005-09-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-09-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-09-09" OBS_VALUE="-2.02061" BBK_DIFF_A="0.08494"/>
      <bbk:Obs TIME_PERIOD="2005-09-08" OBS_VALUE="-2.10555" BBK_DIFF_A="-0.01638"/>
      <bbk:Obs TIME_PERIOD="2005-09-07" OBS_VALUE="-2.08917" BBK_DIFF_A="0.0934"/>
      <bbk:Obs TIME_PERIOD="2005-09-06" OBS_VALUE="-2.18257" BBK_DIFF_A="-0.09249"/>
      <bbk:Obs TIME_PERIOD="2005-09-05" OBS_VALUE="-2.09008" BBK_DIFF_A="0.05037"/>
      <bbk:Obs TIME_PERIOD="2005-09-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-09-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-09-02" OBS_VALUE="-2.14045" BBK_DIFF_A="0.0166"/>
      <bbk:Obs TIME_PERIOD="2005-09-01" OBS_VALUE="-2.15705" BBK_DIFF_A="-0.26883"/>
      <bbk:Obs TIME_PERIOD="2005-08-31" OBS_VALUE="-1.88822" BBK_DIFF_A="0.468"/>
      <bbk:Obs TIME_PERIOD="2005-08-30" OBS_VALUE="-2.35622" BBK_DIFF_A="-0.13114"/>
      <bbk:Obs TIME_PERIOD="2005-08-29" OBS_VALUE="-2.22508" BBK_DIFF_A="0.00465"/>
      <bbk:Obs TIME_PERIOD="2005-08-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-08-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-08-26" OBS_VALUE="-2.22973" BBK_DIFF_A="-0.03111"/>
      <bbk:Obs TIME_PERIOD="2005-08-25" OBS_VALUE="-2.19862" BBK_DIFF_A="0.06682"/>
      <bbk:Obs TIME_PERIOD="2005-08-24" OBS_VALUE="-2.26544" BBK_DIFF_A="-0.16256"/>
      <bbk:Obs TIME_PERIOD="2005-08-23" OBS_VALUE="-2.10288" BBK_DIFF_A="0.11014"/>
      <bbk:Obs TIME_PERIOD="2005-08-22" OBS_VALUE="-2.21302" BBK_DIFF_A="-0.0117"/>
      <bbk:Obs TIME_PERIOD="2005-08-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-08-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-08-19" OBS_VALUE="-2.20132" BBK_DIFF_A="0.00825"/>
      <bbk:Obs TIME_PERIOD="2005-08-18" OBS_VALUE="-2.20957" BBK_DIFF_A="0.03546"/>
      <bbk:Obs TIME_PERIOD="2005-08-17" OBS_VALUE="-2.24503" BBK_DIFF_A="0.12648"/>
      <bbk:Obs TIME_PERIOD="2005-08-16" OBS_VALUE="-2.37151" BBK_DIFF_A="-0.09258"/>
      <bbk:Obs TIME_PERIOD="2005-08-15" OBS_VALUE="-2.27893" BBK_DIFF_A="0.09218"/>
      <bbk:Obs TIME_PERIOD="2005-08-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-08-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-08-12" OBS_VALUE="-2.37111" BBK_DIFF_A="0.03087"/>
      <bbk:Obs TIME_PERIOD="2005-08-11" OBS_VALUE="-2.40198" BBK_DIFF_A="-0.06305"/>
      <bbk:Obs TIME_PERIOD="2005-08-10" OBS_VALUE="-2.33893" BBK_DIFF_A="0.05275"/>
      <bbk:Obs TIME_PERIOD="2005-08-09" OBS_VALUE="-2.39168" BBK_DIFF_A="-0.02707"/>
      <bbk:Obs TIME_PERIOD="2005-08-08" OBS_VALUE="-2.36461" BBK_DIFF_A="0.08375"/>
      <bbk:Obs TIME_PERIOD="2005-08-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-08-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-08-05" OBS_VALUE="-2.44836" BBK_DIFF_A="0.05714"/>
      <bbk:Obs TIME_PERIOD="2005-08-04" OBS_VALUE="-2.5055" BBK_DIFF_A="-0.07825"/>
      <bbk:Obs TIME_PERIOD="2005-08-03" OBS_VALUE="-2.42725" BBK_DIFF_A="-0.11564"/>
      <bbk:Obs TIME_PERIOD="2005-08-02" OBS_VALUE="-2.31161" BBK_DIFF_A="0.00483"/>
      <bbk:Obs TIME_PERIOD="2005-08-01" OBS_VALUE="-2.31644" BBK_DIFF_A="-0.04303"/>
      <bbk:Obs TIME_PERIOD="2005-07-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-07-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-07-29" OBS_VALUE="-2.27341" BBK_DIFF_A="0.03177"/>
      <bbk:Obs TIME_PERIOD="2005-07-28" OBS_VALUE="-2.30518" BBK_DIFF_A="-0.05143"/>
      <bbk:Obs TIME_PERIOD="2005-07-27" OBS_VALUE="-2.25375" BBK_DIFF_A="0.04675"/>
      <bbk:Obs TIME_PERIOD="2005-07-26" OBS_VALUE="-2.3005" BBK_DIFF_A="-0.00768"/>
      <bbk:Obs TIME_PERIOD="2005-07-25" OBS_VALUE="-2.29282" BBK_DIFF_A="0.06133"/>
      <bbk:Obs TIME_PERIOD="2005-07-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-07-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-07-22" OBS_VALUE="-2.35415" BBK_DIFF_A="-0.00418"/>
      <bbk:Obs TIME_PERIOD="2005-07-21" OBS_VALUE="-2.34997" BBK_DIFF_A="0.03288"/>
      <bbk:Obs TIME_PERIOD="2005-07-20" OBS_VALUE="-2.38285" BBK_DIFF_A="0.02238"/>
      <bbk:Obs TIME_PERIOD="2005-07-19" OBS_VALUE="-2.40523" BBK_DIFF_A="-0.0388"/>
      <bbk:Obs TIME_PERIOD="2005-07-18" OBS_VALUE="-2.36643" BBK_DIFF_A="0.044"/>
      <bbk:Obs TIME_PERIOD="2005-07-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-07-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-07-15" OBS_VALUE="-2.41043" BBK_DIFF_A="-0.01606"/>
      <bbk:Obs TIME_PERIOD="2005-07-14" OBS_VALUE="-2.39437" BBK_DIFF_A="-0.01392"/>
      <bbk:Obs TIME_PERIOD="2005-07-13" OBS_VALUE="-2.38045" BBK_DIFF_A="-0.05023"/>
      <bbk:Obs TIME_PERIOD="2005-07-12" OBS_VALUE="-2.33022" BBK_DIFF_A="-0.06291"/>
      <bbk:Obs TIME_PERIOD="2005-07-11" OBS_VALUE="-2.26731" BBK_DIFF_A="1.0E-5"/>
      <bbk:Obs TIME_PERIOD="2005-07-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-07-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-07-08" OBS_VALUE="-2.26732" BBK_DIFF_A="-0.13535"/>
      <bbk:Obs TIME_PERIOD="2005-07-07" OBS_VALUE="-2.13197" BBK_DIFF_A="0.16732"/>
      <bbk:Obs TIME_PERIOD="2005-07-06" OBS_VALUE="-2.29929" BBK_DIFF_A="0.01639"/>
      <bbk:Obs TIME_PERIOD="2005-07-05" OBS_VALUE="-2.31568" BBK_DIFF_A="-1.16587"/>
      <bbk:Obs TIME_PERIOD="2005-07-04" OBS_VALUE="-1.14981" BBK_DIFF_A="1.04275"/>
      <bbk:Obs TIME_PERIOD="2005-07-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-07-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-07-01" OBS_VALUE="-2.19256" BBK_DIFF_A="0.01005"/>
      <bbk:Obs TIME_PERIOD="2005-06-30" OBS_VALUE="-2.20261" BBK_DIFF_A="0.04916"/>
      <bbk:Obs TIME_PERIOD="2005-06-29" OBS_VALUE="-2.25177" BBK_DIFF_A="-0.0851"/>
      <bbk:Obs TIME_PERIOD="2005-06-28" OBS_VALUE="-2.16667" BBK_DIFF_A="-0.03892"/>
      <bbk:Obs TIME_PERIOD="2005-06-27" OBS_VALUE="-2.12775" BBK_DIFF_A="0.02685"/>
      <bbk:Obs TIME_PERIOD="2005-06-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-06-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-06-24" OBS_VALUE="-2.1546" BBK_DIFF_A="0.01539"/>
      <bbk:Obs TIME_PERIOD="2005-06-23" OBS_VALUE="-2.16999" BBK_DIFF_A="-0.02662"/>
      <bbk:Obs TIME_PERIOD="2005-06-22" OBS_VALUE="-2.14337" BBK_DIFF_A="0.13631"/>
      <bbk:Obs TIME_PERIOD="2005-06-21" OBS_VALUE="-2.27968" BBK_DIFF_A="0.07425"/>
      <bbk:Obs TIME_PERIOD="2005-06-20" OBS_VALUE="-2.35393" BBK_DIFF_A="0.06822"/>
      <bbk:Obs TIME_PERIOD="2005-06-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-06-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-06-17" OBS_VALUE="-2.42215" BBK_DIFF_A="0.04954"/>
      <bbk:Obs TIME_PERIOD="2005-06-16" OBS_VALUE="-2.47169" BBK_DIFF_A="-0.12445"/>
      <bbk:Obs TIME_PERIOD="2005-06-15" OBS_VALUE="-2.34724" BBK_DIFF_A="-0.07351"/>
      <bbk:Obs TIME_PERIOD="2005-06-14" OBS_VALUE="-2.27373" BBK_DIFF_A="-0.07057"/>
      <bbk:Obs TIME_PERIOD="2005-06-13" OBS_VALUE="-2.20316" BBK_DIFF_A="-0.0261"/>
      <bbk:Obs TIME_PERIOD="2005-06-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-06-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-06-10" OBS_VALUE="-2.17706" BBK_DIFF_A="-0.03308"/>
      <bbk:Obs TIME_PERIOD="2005-06-09" OBS_VALUE="-2.14398" BBK_DIFF_A="0.00867"/>
      <bbk:Obs TIME_PERIOD="2005-06-08" OBS_VALUE="-2.15265" BBK_DIFF_A="0.06854"/>
      <bbk:Obs TIME_PERIOD="2005-06-07" OBS_VALUE="-2.22119" BBK_DIFF_A="0.11902"/>
      <bbk:Obs TIME_PERIOD="2005-06-06" OBS_VALUE="-2.34021" BBK_DIFF_A="0.00542"/>
      <bbk:Obs TIME_PERIOD="2005-06-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-06-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-06-03" OBS_VALUE="-2.34563" BBK_DIFF_A="0.0739"/>
      <bbk:Obs TIME_PERIOD="2005-06-02" OBS_VALUE="-2.41953" BBK_DIFF_A="0.02569"/>
      <bbk:Obs TIME_PERIOD="2005-06-01" OBS_VALUE="-2.44522" BBK_DIFF_A="0.02115"/>
      <bbk:Obs TIME_PERIOD="2005-05-31" OBS_VALUE="-2.46637" BBK_DIFF_A="0.07168"/>
      <bbk:Obs TIME_PERIOD="2005-05-30" OBS_VALUE="-2.53805" BBK_DIFF_A="0.00427"/>
      <bbk:Obs TIME_PERIOD="2005-05-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-05-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-05-27" OBS_VALUE="-2.54232" BBK_DIFF_A="0.03246"/>
      <bbk:Obs TIME_PERIOD="2005-05-26" OBS_VALUE="-2.57478" BBK_DIFF_A="-0.20686"/>
      <bbk:Obs TIME_PERIOD="2005-05-25" OBS_VALUE="-2.36792" BBK_DIFF_A="-0.00523"/>
      <bbk:Obs TIME_PERIOD="2005-05-24" OBS_VALUE="-2.36269" BBK_DIFF_A="0.0967"/>
      <bbk:Obs TIME_PERIOD="2005-05-23" OBS_VALUE="-2.45939" BBK_DIFF_A="0.0066"/>
      <bbk:Obs TIME_PERIOD="2005-05-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-05-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-05-20" OBS_VALUE="-2.46599" BBK_DIFF_A="-0.00811"/>
      <bbk:Obs TIME_PERIOD="2005-05-19" OBS_VALUE="-2.45788" BBK_DIFF_A="-0.02082"/>
      <bbk:Obs TIME_PERIOD="2005-05-18" OBS_VALUE="-2.43706" BBK_DIFF_A="0.04494"/>
      <bbk:Obs TIME_PERIOD="2005-05-17" OBS_VALUE="-2.482" BBK_DIFF_A="0.07549"/>
      <bbk:Obs TIME_PERIOD="2005-05-16" OBS_VALUE="-2.55749" BBK_DIFF_A="-0.0876"/>
      <bbk:Obs TIME_PERIOD="2005-05-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-05-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-05-13" OBS_VALUE="-2.46989" BBK_DIFF_A="0.08414"/>
      <bbk:Obs TIME_PERIOD="2005-05-12" OBS_VALUE="-2.55403" BBK_DIFF_A="-0.06024"/>
      <bbk:Obs TIME_PERIOD="2005-05-11" OBS_VALUE="-2.49379" BBK_DIFF_A="0.08681"/>
      <bbk:Obs TIME_PERIOD="2005-05-10" OBS_VALUE="-2.5806" BBK_DIFF_A="0.05318"/>
      <bbk:Obs TIME_PERIOD="2005-05-09" OBS_VALUE="-2.63378" BBK_DIFF_A="0.05913"/>
      <bbk:Obs TIME_PERIOD="2005-05-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-05-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-05-06" OBS_VALUE="-2.69291" BBK_DIFF_A="-0.06753"/>
      <bbk:Obs TIME_PERIOD="2005-05-05" OBS_VALUE="-2.62538" BBK_DIFF_A="0.03402"/>
      <bbk:Obs TIME_PERIOD="2005-05-04" OBS_VALUE="-2.6594" BBK_DIFF_A="-0.0303"/>
      <bbk:Obs TIME_PERIOD="2005-05-03" OBS_VALUE="-2.6291" BBK_DIFF_A="-0.00169"/>
      <bbk:Obs TIME_PERIOD="2005-05-02" OBS_VALUE="-2.62741" BBK_DIFF_A="-0.1042"/>
      <bbk:Obs TIME_PERIOD="2005-05-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-04-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-04-29" OBS_VALUE="-2.52321" BBK_DIFF_A="0.20178"/>
      <bbk:Obs TIME_PERIOD="2005-04-28" OBS_VALUE="-2.72499" BBK_DIFF_A="-0.11512"/>
      <bbk:Obs TIME_PERIOD="2005-04-27" OBS_VALUE="-2.60987" BBK_DIFF_A="0.03036"/>
      <bbk:Obs TIME_PERIOD="2005-04-26" OBS_VALUE="-2.64023" BBK_DIFF_A="0.03567"/>
      <bbk:Obs TIME_PERIOD="2005-04-25" OBS_VALUE="-2.6759" BBK_DIFF_A="0.05838"/>
      <bbk:Obs TIME_PERIOD="2005-04-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-04-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-04-22" OBS_VALUE="-2.73428" BBK_DIFF_A="-0.0448"/>
      <bbk:Obs TIME_PERIOD="2005-04-21" OBS_VALUE="-2.68948" BBK_DIFF_A="0.00476"/>
      <bbk:Obs TIME_PERIOD="2005-04-20" OBS_VALUE="-2.69424" BBK_DIFF_A="0.06153"/>
      <bbk:Obs TIME_PERIOD="2005-04-19" OBS_VALUE="-2.75577" BBK_DIFF_A="-0.04102"/>
      <bbk:Obs TIME_PERIOD="2005-04-18" OBS_VALUE="-2.71475" BBK_DIFF_A="-0.12476"/>
      <bbk:Obs TIME_PERIOD="2005-04-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-04-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-04-15" OBS_VALUE="-2.58999" BBK_DIFF_A="0.21056"/>
      <bbk:Obs TIME_PERIOD="2005-04-14" OBS_VALUE="-2.80055" BBK_DIFF_A="0.01457"/>
      <bbk:Obs TIME_PERIOD="2005-04-13" OBS_VALUE="-2.81512" BBK_DIFF_A="0.01124"/>
      <bbk:Obs TIME_PERIOD="2005-04-12" OBS_VALUE="-2.82636" BBK_DIFF_A="0.00762"/>
      <bbk:Obs TIME_PERIOD="2005-04-11" OBS_VALUE="-2.83398" BBK_DIFF_A="0.03176"/>
      <bbk:Obs TIME_PERIOD="2005-04-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-04-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-04-08" OBS_VALUE="-2.86574" BBK_DIFF_A="4.0E-5"/>
      <bbk:Obs TIME_PERIOD="2005-04-07" OBS_VALUE="-2.86578" BBK_DIFF_A="-0.05919"/>
      <bbk:Obs TIME_PERIOD="2005-04-06" OBS_VALUE="-2.80659" BBK_DIFF_A="-0.01604"/>
      <bbk:Obs TIME_PERIOD="2005-04-05" OBS_VALUE="-2.79055" BBK_DIFF_A="-0.06033"/>
      <bbk:Obs TIME_PERIOD="2005-04-04" OBS_VALUE="-2.73022" BBK_DIFF_A="0.03235"/>
      <bbk:Obs TIME_PERIOD="2005-04-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-04-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-04-01" OBS_VALUE="-2.76257" BBK_DIFF_A="-0.50692"/>
      <bbk:Obs TIME_PERIOD="2005-03-31" OBS_VALUE="-2.25565" BBK_DIFF_A="0.50817"/>
      <bbk:Obs TIME_PERIOD="2005-03-30" OBS_VALUE="-2.76382" BBK_DIFF_A="-0.28217"/>
      <bbk:Obs TIME_PERIOD="2005-03-29" OBS_VALUE="-2.48165" BBK_DIFF_A="0.24007"/>
      <bbk:Obs TIME_PERIOD="2005-03-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-03-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-03-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-03-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-03-24" OBS_VALUE="-2.72172" BBK_DIFF_A="-0.01165"/>
      <bbk:Obs TIME_PERIOD="2005-03-23" OBS_VALUE="-2.71007" BBK_DIFF_A="0.10793"/>
      <bbk:Obs TIME_PERIOD="2005-03-22" OBS_VALUE="-2.818" BBK_DIFF_A="0.03916"/>
      <bbk:Obs TIME_PERIOD="2005-03-21" OBS_VALUE="-2.85716" BBK_DIFF_A="-1.02698"/>
      <bbk:Obs TIME_PERIOD="2005-03-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-03-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-03-18" OBS_VALUE="-1.83018" BBK_DIFF_A="1.02454"/>
      <bbk:Obs TIME_PERIOD="2005-03-17" OBS_VALUE="-2.85472" BBK_DIFF_A="0.00893"/>
      <bbk:Obs TIME_PERIOD="2005-03-16" OBS_VALUE="-2.86365" BBK_DIFF_A="0.03896"/>
      <bbk:Obs TIME_PERIOD="2005-03-15" OBS_VALUE="-2.90261" BBK_DIFF_A="0.04919"/>
      <bbk:Obs TIME_PERIOD="2005-03-14" OBS_VALUE="-2.9518" BBK_DIFF_A="-0.05583"/>
      <bbk:Obs TIME_PERIOD="2005-03-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-03-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-03-11" OBS_VALUE="-2.89597" BBK_DIFF_A="0.00641"/>
      <bbk:Obs TIME_PERIOD="2005-03-10" OBS_VALUE="-2.90238" BBK_DIFF_A="-0.03919"/>
      <bbk:Obs TIME_PERIOD="2005-03-09" OBS_VALUE="-2.86319" BBK_DIFF_A="-0.08527"/>
      <bbk:Obs TIME_PERIOD="2005-03-08" OBS_VALUE="-2.77792" BBK_DIFF_A="-0.01176"/>
      <bbk:Obs TIME_PERIOD="2005-03-07" OBS_VALUE="-2.76616" BBK_DIFF_A="0.07196"/>
      <bbk:Obs TIME_PERIOD="2005-03-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-03-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-03-04" OBS_VALUE="-2.83812" BBK_DIFF_A="0.07132"/>
      <bbk:Obs TIME_PERIOD="2005-03-03" OBS_VALUE="-2.90944" BBK_DIFF_A="-0.07632"/>
      <bbk:Obs TIME_PERIOD="2005-03-02" OBS_VALUE="-2.83312" BBK_DIFF_A="-0.05375"/>
      <bbk:Obs TIME_PERIOD="2005-03-01" OBS_VALUE="-2.77937" BBK_DIFF_A="-0.10552"/>
      <bbk:Obs TIME_PERIOD="2005-02-28" OBS_VALUE="-2.67385" BBK_DIFF_A="0.10527"/>
      <bbk:Obs TIME_PERIOD="2005-02-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-02-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-02-25" OBS_VALUE="-2.77912" BBK_DIFF_A="0.03023"/>
      <bbk:Obs TIME_PERIOD="2005-02-24" OBS_VALUE="-2.80935" BBK_DIFF_A="-0.12177"/>
      <bbk:Obs TIME_PERIOD="2005-02-23" OBS_VALUE="-2.68758" BBK_DIFF_A="0.06363"/>
      <bbk:Obs TIME_PERIOD="2005-02-22" OBS_VALUE="-2.75121" BBK_DIFF_A="-0.01555"/>
      <bbk:Obs TIME_PERIOD="2005-02-21" OBS_VALUE="-2.73566" BBK_DIFF_A="-0.06269"/>
      <bbk:Obs TIME_PERIOD="2005-02-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-02-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-02-18" OBS_VALUE="-2.67297" BBK_DIFF_A="-0.16581"/>
      <bbk:Obs TIME_PERIOD="2005-02-17" OBS_VALUE="-2.50716" BBK_DIFF_A="-0.0563"/>
      <bbk:Obs TIME_PERIOD="2005-02-16" OBS_VALUE="-2.45086" BBK_DIFF_A="0.04527"/>
      <bbk:Obs TIME_PERIOD="2005-02-15" OBS_VALUE="-2.49613" BBK_DIFF_A="-5.3E-4"/>
      <bbk:Obs TIME_PERIOD="2005-02-14" OBS_VALUE="-2.4956" BBK_DIFF_A="-0.09416"/>
      <bbk:Obs TIME_PERIOD="2005-02-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-02-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-02-11" OBS_VALUE="-2.40144" BBK_DIFF_A="-0.01762"/>
      <bbk:Obs TIME_PERIOD="2005-02-10" OBS_VALUE="-2.38382" BBK_DIFF_A="-0.09692"/>
      <bbk:Obs TIME_PERIOD="2005-02-09" OBS_VALUE="-2.2869" BBK_DIFF_A="0.18512"/>
      <bbk:Obs TIME_PERIOD="2005-02-08" OBS_VALUE="-2.47202" BBK_DIFF_A="-0.04421"/>
      <bbk:Obs TIME_PERIOD="2005-02-07" OBS_VALUE="-2.42781" BBK_DIFF_A="0.08541"/>
      <bbk:Obs TIME_PERIOD="2005-02-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-02-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-02-04" OBS_VALUE="-2.51322" BBK_DIFF_A="-0.0258"/>
      <bbk:Obs TIME_PERIOD="2005-02-03" OBS_VALUE="-2.48742" BBK_DIFF_A="0.07238"/>
      <bbk:Obs TIME_PERIOD="2005-02-02" OBS_VALUE="-2.5598" BBK_DIFF_A="0.02848"/>
      <bbk:Obs TIME_PERIOD="2005-02-01" OBS_VALUE="-2.58828" BBK_DIFF_A="0.05763"/>
      <bbk:Obs TIME_PERIOD="2005-01-31" OBS_VALUE="-2.64591" BBK_DIFF_A="-0.12106"/>
      <bbk:Obs TIME_PERIOD="2005-01-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-01-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-01-28" OBS_VALUE="-2.52485" BBK_DIFF_A="0.17061"/>
      <bbk:Obs TIME_PERIOD="2005-01-27" OBS_VALUE="-2.69546" BBK_DIFF_A="0.02125"/>
      <bbk:Obs TIME_PERIOD="2005-01-26" OBS_VALUE="-2.71671" BBK_DIFF_A="-0.48699"/>
      <bbk:Obs TIME_PERIOD="2005-01-25" OBS_VALUE="-2.22972" BBK_DIFF_A="0.50282"/>
      <bbk:Obs TIME_PERIOD="2005-01-24" OBS_VALUE="-2.73254" BBK_DIFF_A="0.05159"/>
      <bbk:Obs TIME_PERIOD="2005-01-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-01-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-01-21" OBS_VALUE="-2.78413" BBK_DIFF_A="-0.0339"/>
      <bbk:Obs TIME_PERIOD="2005-01-20" OBS_VALUE="-2.75023" BBK_DIFF_A="0.08496"/>
      <bbk:Obs TIME_PERIOD="2005-01-19" OBS_VALUE="-2.83519" BBK_DIFF_A="0.0037"/>
      <bbk:Obs TIME_PERIOD="2005-01-18" OBS_VALUE="-2.83889" BBK_DIFF_A="-0.0631"/>
      <bbk:Obs TIME_PERIOD="2005-01-17" OBS_VALUE="-2.77579" BBK_DIFF_A="0.04624"/>
      <bbk:Obs TIME_PERIOD="2005-01-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-01-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-01-14" OBS_VALUE="-2.82203" BBK_DIFF_A="0.09432"/>
      <bbk:Obs TIME_PERIOD="2005-01-13" OBS_VALUE="-2.91635" BBK_DIFF_A="0.0426"/>
      <bbk:Obs TIME_PERIOD="2005-01-12" OBS_VALUE="-2.95895" BBK_DIFF_A="-0.05701"/>
      <bbk:Obs TIME_PERIOD="2005-01-11" OBS_VALUE="-2.90194" BBK_DIFF_A="0.05176"/>
      <bbk:Obs TIME_PERIOD="2005-01-10" OBS_VALUE="-2.9537" BBK_DIFF_A="-0.02369"/>
      <bbk:Obs TIME_PERIOD="2005-01-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-01-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-01-07" OBS_VALUE="-2.93001" BBK_DIFF_A="-0.15419"/>
      <bbk:Obs TIME_PERIOD="2005-01-06" OBS_VALUE="-2.77582" BBK_DIFF_A="0.16956"/>
      <bbk:Obs TIME_PERIOD="2005-01-05" OBS_VALUE="-2.94538" BBK_DIFF_A="0.09859"/>
      <bbk:Obs TIME_PERIOD="2005-01-04" OBS_VALUE="-3.04397" BBK_DIFF_A="-0.02717"/>
      <bbk:Obs TIME_PERIOD="2005-01-03" OBS_VALUE="-3.0168" BBK_DIFF_A="0.15745"/>
      <bbk:Obs TIME_PERIOD="2005-01-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2005-01-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-12-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-12-30" OBS_VALUE="-3.17425" BBK_DIFF_A="0.19586"/>
      <bbk:Obs TIME_PERIOD="2004-12-29" OBS_VALUE="-3.37011" BBK_DIFF_A="-0.36413"/>
      <bbk:Obs TIME_PERIOD="2004-12-28" OBS_VALUE="-3.00598" BBK_DIFF_A="-0.05114"/>
      <bbk:Obs TIME_PERIOD="2004-12-27" OBS_VALUE="-2.95484" BBK_DIFF_A="-0.00346"/>
      <bbk:Obs TIME_PERIOD="2004-12-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-12-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-12-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-12-23" OBS_VALUE="-2.95138" BBK_DIFF_A="0.01059"/>
      <bbk:Obs TIME_PERIOD="2004-12-22" OBS_VALUE="-2.96197" BBK_DIFF_A="-0.11755"/>
      <bbk:Obs TIME_PERIOD="2004-12-21" OBS_VALUE="-2.84442" BBK_DIFF_A="0.0192"/>
      <bbk:Obs TIME_PERIOD="2004-12-20" OBS_VALUE="-2.86362" BBK_DIFF_A="0.21189"/>
      <bbk:Obs TIME_PERIOD="2004-12-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-12-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-12-17" OBS_VALUE="-3.07551" BBK_DIFF_A="-0.23698"/>
      <bbk:Obs TIME_PERIOD="2004-12-16" OBS_VALUE="-2.83853" BBK_DIFF_A="-0.00265"/>
      <bbk:Obs TIME_PERIOD="2004-12-15" OBS_VALUE="-2.83588" BBK_DIFF_A="0.13102"/>
      <bbk:Obs TIME_PERIOD="2004-12-14" OBS_VALUE="-2.9669" BBK_DIFF_A="-0.01902"/>
      <bbk:Obs TIME_PERIOD="2004-12-13" OBS_VALUE="-2.94788" BBK_DIFF_A="0.08517"/>
      <bbk:Obs TIME_PERIOD="2004-12-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-12-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-12-10" OBS_VALUE="-3.03305" BBK_DIFF_A="-0.0157"/>
      <bbk:Obs TIME_PERIOD="2004-12-09" OBS_VALUE="-3.01735" BBK_DIFF_A="0.01666"/>
      <bbk:Obs TIME_PERIOD="2004-12-08" OBS_VALUE="-3.03401" BBK_DIFF_A="-0.01545"/>
      <bbk:Obs TIME_PERIOD="2004-12-07" OBS_VALUE="-3.01856" BBK_DIFF_A="-0.02546"/>
      <bbk:Obs TIME_PERIOD="2004-12-06" OBS_VALUE="-2.9931" BBK_DIFF_A="0.12739"/>
      <bbk:Obs TIME_PERIOD="2004-12-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-12-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-12-03" OBS_VALUE="-3.12049" BBK_DIFF_A="-0.0795"/>
      <bbk:Obs TIME_PERIOD="2004-12-02" OBS_VALUE="-3.04099" BBK_DIFF_A="-0.01976"/>
      <bbk:Obs TIME_PERIOD="2004-12-01" OBS_VALUE="-3.02123" BBK_DIFF_A="0.0282"/>
      <bbk:Obs TIME_PERIOD="2004-11-30" OBS_VALUE="-3.04943" BBK_DIFF_A="-0.0463"/>
      <bbk:Obs TIME_PERIOD="2004-11-29" OBS_VALUE="-3.00313" BBK_DIFF_A="0.01181"/>
      <bbk:Obs TIME_PERIOD="2004-11-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-11-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-11-26" OBS_VALUE="-3.01494" BBK_DIFF_A="0.01678"/>
      <bbk:Obs TIME_PERIOD="2004-11-25" OBS_VALUE="-3.03172" BBK_DIFF_A="0.01935"/>
      <bbk:Obs TIME_PERIOD="2004-11-24" OBS_VALUE="-3.05107" BBK_DIFF_A="0.0222"/>
      <bbk:Obs TIME_PERIOD="2004-11-23" OBS_VALUE="-3.07327" BBK_DIFF_A="0.0193"/>
      <bbk:Obs TIME_PERIOD="2004-11-22" OBS_VALUE="-3.09257" BBK_DIFF_A="-0.00523"/>
      <bbk:Obs TIME_PERIOD="2004-11-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-11-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-11-19" OBS_VALUE="-3.08734" BBK_DIFF_A="-0.01639"/>
      <bbk:Obs TIME_PERIOD="2004-11-18" OBS_VALUE="-3.07095" BBK_DIFF_A="-0.01462"/>
      <bbk:Obs TIME_PERIOD="2004-11-17" OBS_VALUE="-3.05633" BBK_DIFF_A="-0.01572"/>
      <bbk:Obs TIME_PERIOD="2004-11-16" OBS_VALUE="-3.04061" BBK_DIFF_A="0.03057"/>
      <bbk:Obs TIME_PERIOD="2004-11-15" OBS_VALUE="-3.07118" BBK_DIFF_A="0.05147"/>
      <bbk:Obs TIME_PERIOD="2004-11-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-11-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-11-12" OBS_VALUE="-3.12265" BBK_DIFF_A="0.05327"/>
      <bbk:Obs TIME_PERIOD="2004-11-11" OBS_VALUE="-3.17592" BBK_DIFF_A="-0.00582"/>
      <bbk:Obs TIME_PERIOD="2004-11-10" OBS_VALUE="-3.1701" BBK_DIFF_A="0.04926"/>
      <bbk:Obs TIME_PERIOD="2004-11-09" OBS_VALUE="-3.21936" BBK_DIFF_A="0.03743"/>
      <bbk:Obs TIME_PERIOD="2004-11-08" OBS_VALUE="-3.25679" BBK_DIFF_A="-0.02562"/>
      <bbk:Obs TIME_PERIOD="2004-11-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-11-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-11-05" OBS_VALUE="-3.23117" BBK_DIFF_A="0.02593"/>
      <bbk:Obs TIME_PERIOD="2004-11-04" OBS_VALUE="-3.2571" BBK_DIFF_A="0.06271"/>
      <bbk:Obs TIME_PERIOD="2004-11-03" OBS_VALUE="-3.31981" BBK_DIFF_A="-0.02082"/>
      <bbk:Obs TIME_PERIOD="2004-11-02" OBS_VALUE="-3.29899" BBK_DIFF_A="-0.00573"/>
      <bbk:Obs TIME_PERIOD="2004-11-01" OBS_VALUE="-3.29326" BBK_DIFF_A="0.02654"/>
      <bbk:Obs TIME_PERIOD="2004-10-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-10-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-10-29" OBS_VALUE="-3.3198" BBK_DIFF_A="0.01896"/>
      <bbk:Obs TIME_PERIOD="2004-10-28" OBS_VALUE="-3.33876" BBK_DIFF_A="-0.03484"/>
      <bbk:Obs TIME_PERIOD="2004-10-27" OBS_VALUE="-3.30392" BBK_DIFF_A="-0.00859"/>
      <bbk:Obs TIME_PERIOD="2004-10-26" OBS_VALUE="-3.29533" BBK_DIFF_A="0.01216"/>
      <bbk:Obs TIME_PERIOD="2004-10-25" OBS_VALUE="-3.30749" BBK_DIFF_A="0.02251"/>
      <bbk:Obs TIME_PERIOD="2004-10-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-10-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-10-22" OBS_VALUE="-3.33" BBK_DIFF_A="0.00302"/>
      <bbk:Obs TIME_PERIOD="2004-10-21" OBS_VALUE="-3.33302" BBK_DIFF_A="0.02722"/>
      <bbk:Obs TIME_PERIOD="2004-10-20" OBS_VALUE="-3.36024" BBK_DIFF_A="-0.0024"/>
      <bbk:Obs TIME_PERIOD="2004-10-19" OBS_VALUE="-3.35784" BBK_DIFF_A="0.01219"/>
      <bbk:Obs TIME_PERIOD="2004-10-18" OBS_VALUE="-3.37003" BBK_DIFF_A="-0.0665"/>
      <bbk:Obs TIME_PERIOD="2004-10-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-10-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-10-15" OBS_VALUE="-3.30353" BBK_DIFF_A="0.03647"/>
      <bbk:Obs TIME_PERIOD="2004-10-14" OBS_VALUE="-3.34" BBK_DIFF_A="0.24313"/>
      <bbk:Obs TIME_PERIOD="2004-10-13" OBS_VALUE="-3.58313" BBK_DIFF_A="-0.22264"/>
      <bbk:Obs TIME_PERIOD="2004-10-12" OBS_VALUE="-3.36049" BBK_DIFF_A="0.21502"/>
      <bbk:Obs TIME_PERIOD="2004-10-11" OBS_VALUE="-3.57551" BBK_DIFF_A="-0.12117"/>
      <bbk:Obs TIME_PERIOD="2004-10-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-10-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-10-08" OBS_VALUE="-3.45434" BBK_DIFF_A="0.04564"/>
      <bbk:Obs TIME_PERIOD="2004-10-07" OBS_VALUE="-3.49998" BBK_DIFF_A="-0.09582"/>
      <bbk:Obs TIME_PERIOD="2004-10-06" OBS_VALUE="-3.40416" BBK_DIFF_A="0.03475"/>
      <bbk:Obs TIME_PERIOD="2004-10-05" OBS_VALUE="-3.43891" BBK_DIFF_A="0.00822"/>
      <bbk:Obs TIME_PERIOD="2004-10-04" OBS_VALUE="-3.44713" BBK_DIFF_A="-0.01024"/>
      <bbk:Obs TIME_PERIOD="2004-10-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-10-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-10-01" OBS_VALUE="-3.43689" BBK_DIFF_A="0.28782"/>
      <bbk:Obs TIME_PERIOD="2004-09-30" OBS_VALUE="-3.72471" BBK_DIFF_A="-0.23353"/>
      <bbk:Obs TIME_PERIOD="2004-09-29" OBS_VALUE="-3.49118" BBK_DIFF_A="-0.16836"/>
      <bbk:Obs TIME_PERIOD="2004-09-28" OBS_VALUE="-3.32282" BBK_DIFF_A="0.28574"/>
      <bbk:Obs TIME_PERIOD="2004-09-27" OBS_VALUE="-3.60856" BBK_DIFF_A="-0.16565"/>
      <bbk:Obs TIME_PERIOD="2004-09-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-09-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-09-24" OBS_VALUE="-3.44291" BBK_DIFF_A="-0.02671"/>
      <bbk:Obs TIME_PERIOD="2004-09-23" OBS_VALUE="-3.4162" BBK_DIFF_A="0.01631"/>
      <bbk:Obs TIME_PERIOD="2004-09-22" OBS_VALUE="-3.43251" BBK_DIFF_A="0.12741"/>
      <bbk:Obs TIME_PERIOD="2004-09-21" OBS_VALUE="-3.55992" BBK_DIFF_A="-0.0243"/>
      <bbk:Obs TIME_PERIOD="2004-09-20" OBS_VALUE="-3.53562" BBK_DIFF_A="-0.10121"/>
      <bbk:Obs TIME_PERIOD="2004-09-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-09-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-09-17" OBS_VALUE="-3.43441" BBK_DIFF_A="0.18039"/>
      <bbk:Obs TIME_PERIOD="2004-09-16" OBS_VALUE="-3.6148" BBK_DIFF_A="-0.08438"/>
      <bbk:Obs TIME_PERIOD="2004-09-15" OBS_VALUE="-3.53042" BBK_DIFF_A="0.34407"/>
      <bbk:Obs TIME_PERIOD="2004-09-14" OBS_VALUE="-3.87449" BBK_DIFF_A="-0.39251"/>
      <bbk:Obs TIME_PERIOD="2004-09-13" OBS_VALUE="-3.48198" BBK_DIFF_A="0.11438"/>
      <bbk:Obs TIME_PERIOD="2004-09-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-09-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-09-10" OBS_VALUE="-3.59636" BBK_DIFF_A="0.09438"/>
      <bbk:Obs TIME_PERIOD="2004-09-09" OBS_VALUE="-3.69074" BBK_DIFF_A="-0.0147"/>
      <bbk:Obs TIME_PERIOD="2004-09-08" OBS_VALUE="-3.67604" BBK_DIFF_A="-0.03946"/>
      <bbk:Obs TIME_PERIOD="2004-09-07" OBS_VALUE="-3.63658" BBK_DIFF_A="-0.0104"/>
      <bbk:Obs TIME_PERIOD="2004-09-06" OBS_VALUE="-3.62618" BBK_DIFF_A="0.1451"/>
      <bbk:Obs TIME_PERIOD="2004-09-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-09-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-09-03" OBS_VALUE="-3.77128" BBK_DIFF_A="-0.27515"/>
      <bbk:Obs TIME_PERIOD="2004-09-02" OBS_VALUE="-3.49613" BBK_DIFF_A="-0.07589"/>
      <bbk:Obs TIME_PERIOD="2004-09-01" OBS_VALUE="-3.42024" BBK_DIFF_A="0.30339"/>
      <bbk:Obs TIME_PERIOD="2004-08-31" OBS_VALUE="-3.72363" BBK_DIFF_A="-0.00648"/>
      <bbk:Obs TIME_PERIOD="2004-08-30" OBS_VALUE="-3.71715" BBK_DIFF_A="-0.19448"/>
      <bbk:Obs TIME_PERIOD="2004-08-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-08-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-08-27" OBS_VALUE="-3.52267" BBK_DIFF_A="-0.09721"/>
      <bbk:Obs TIME_PERIOD="2004-08-26" OBS_VALUE="-3.42546" BBK_DIFF_A="0.14265"/>
      <bbk:Obs TIME_PERIOD="2004-08-25" OBS_VALUE="-3.56811" BBK_DIFF_A="0.6068"/>
      <bbk:Obs TIME_PERIOD="2004-08-24" OBS_VALUE="-4.17491" BBK_DIFF_A="-0.66239"/>
      <bbk:Obs TIME_PERIOD="2004-08-23" OBS_VALUE="-3.51252" BBK_DIFF_A="-0.01981"/>
      <bbk:Obs TIME_PERIOD="2004-08-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-08-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-08-20" OBS_VALUE="-3.49271" BBK_DIFF_A="0.02006"/>
      <bbk:Obs TIME_PERIOD="2004-08-19" OBS_VALUE="-3.51277" BBK_DIFF_A="0.06902"/>
      <bbk:Obs TIME_PERIOD="2004-08-18" OBS_VALUE="-3.58179" BBK_DIFF_A="0.16582"/>
      <bbk:Obs TIME_PERIOD="2004-08-17" OBS_VALUE="-3.74761" BBK_DIFF_A="-0.2359"/>
      <bbk:Obs TIME_PERIOD="2004-08-16" OBS_VALUE="-3.51171" BBK_DIFF_A="-0.02"/>
      <bbk:Obs TIME_PERIOD="2004-08-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-08-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-08-13" OBS_VALUE="-3.49171" BBK_DIFF_A="0.02397"/>
      <bbk:Obs TIME_PERIOD="2004-08-12" OBS_VALUE="-3.51568" BBK_DIFF_A="0.01248"/>
      <bbk:Obs TIME_PERIOD="2004-08-11" OBS_VALUE="-3.52816" BBK_DIFF_A="-0.01912"/>
      <bbk:Obs TIME_PERIOD="2004-08-10" OBS_VALUE="-3.50904" BBK_DIFF_A="0.03115"/>
      <bbk:Obs TIME_PERIOD="2004-08-09" OBS_VALUE="-3.54019" BBK_DIFF_A="0.12636"/>
      <bbk:Obs TIME_PERIOD="2004-08-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-08-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-08-06" OBS_VALUE="-3.66655" BBK_DIFF_A="0.00132"/>
      <bbk:Obs TIME_PERIOD="2004-08-05" OBS_VALUE="-3.66787" BBK_DIFF_A="0.05781"/>
      <bbk:Obs TIME_PERIOD="2004-08-04" OBS_VALUE="-3.72568" BBK_DIFF_A="0.09924"/>
      <bbk:Obs TIME_PERIOD="2004-08-03" OBS_VALUE="-3.82492" BBK_DIFF_A="-0.19217"/>
      <bbk:Obs TIME_PERIOD="2004-08-02" OBS_VALUE="-3.63275" BBK_DIFF_A="0.28156"/>
      <bbk:Obs TIME_PERIOD="2004-08-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-07-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-07-30" OBS_VALUE="-3.91431" BBK_DIFF_A="-0.13033"/>
      <bbk:Obs TIME_PERIOD="2004-07-29" OBS_VALUE="-3.78398" BBK_DIFF_A="0.2378"/>
      <bbk:Obs TIME_PERIOD="2004-07-28" OBS_VALUE="-4.02178" BBK_DIFF_A="-0.27253"/>
      <bbk:Obs TIME_PERIOD="2004-07-27" OBS_VALUE="-3.74925" BBK_DIFF_A="0.37583"/>
      <bbk:Obs TIME_PERIOD="2004-07-26" OBS_VALUE="-4.12508" BBK_DIFF_A="-0.19864"/>
      <bbk:Obs TIME_PERIOD="2004-07-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-07-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-07-23" OBS_VALUE="-3.92644" BBK_DIFF_A="-0.03509"/>
      <bbk:Obs TIME_PERIOD="2004-07-22" OBS_VALUE="-3.89135" BBK_DIFF_A="0.07721"/>
      <bbk:Obs TIME_PERIOD="2004-07-21" OBS_VALUE="-3.96856" BBK_DIFF_A="-0.25325"/>
      <bbk:Obs TIME_PERIOD="2004-07-20" OBS_VALUE="-3.71531" BBK_DIFF_A="0.00189"/>
      <bbk:Obs TIME_PERIOD="2004-07-19" OBS_VALUE="-3.7172" BBK_DIFF_A="0.25062"/>
      <bbk:Obs TIME_PERIOD="2004-07-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-07-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-07-16" OBS_VALUE="-3.96782" BBK_DIFF_A="0.05692"/>
      <bbk:Obs TIME_PERIOD="2004-07-15" OBS_VALUE="-4.02474" BBK_DIFF_A="-0.14079"/>
      <bbk:Obs TIME_PERIOD="2004-07-14" OBS_VALUE="-3.88395" BBK_DIFF_A="0.09811"/>
      <bbk:Obs TIME_PERIOD="2004-07-13" OBS_VALUE="-3.98206" BBK_DIFF_A="-0.30305"/>
      <bbk:Obs TIME_PERIOD="2004-07-12" OBS_VALUE="-3.67901" BBK_DIFF_A="-0.01987"/>
      <bbk:Obs TIME_PERIOD="2004-07-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-07-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-07-09" OBS_VALUE="-3.65914" BBK_DIFF_A="0.05039"/>
      <bbk:Obs TIME_PERIOD="2004-07-08" OBS_VALUE="-3.70953" BBK_DIFF_A="0.01776"/>
      <bbk:Obs TIME_PERIOD="2004-07-07" OBS_VALUE="-3.72729" BBK_DIFF_A="-0.00616"/>
      <bbk:Obs TIME_PERIOD="2004-07-06" OBS_VALUE="-3.72113" BBK_DIFF_A="-0.0207"/>
      <bbk:Obs TIME_PERIOD="2004-07-05" OBS_VALUE="-3.70043" BBK_DIFF_A="0.21291"/>
      <bbk:Obs TIME_PERIOD="2004-07-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-07-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-07-02" OBS_VALUE="-3.91334" BBK_DIFF_A="-0.13095"/>
      <bbk:Obs TIME_PERIOD="2004-07-01" OBS_VALUE="-3.78239" BBK_DIFF_A="0.12014"/>
      <bbk:Obs TIME_PERIOD="2004-06-30" OBS_VALUE="-3.90253" BBK_DIFF_A="0.01365"/>
      <bbk:Obs TIME_PERIOD="2004-06-29" OBS_VALUE="-3.91618" BBK_DIFF_A="0.11079"/>
      <bbk:Obs TIME_PERIOD="2004-06-28" OBS_VALUE="-4.02697" BBK_DIFF_A="-0.10004"/>
      <bbk:Obs TIME_PERIOD="2004-06-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-06-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-06-25" OBS_VALUE="-3.92693" BBK_DIFF_A="0.00737"/>
      <bbk:Obs TIME_PERIOD="2004-06-24" OBS_VALUE="-3.9343" BBK_DIFF_A="-0.02346"/>
      <bbk:Obs TIME_PERIOD="2004-06-23" OBS_VALUE="-3.91084" BBK_DIFF_A="0.02946"/>
      <bbk:Obs TIME_PERIOD="2004-06-22" OBS_VALUE="-3.9403" BBK_DIFF_A="-0.06463"/>
      <bbk:Obs TIME_PERIOD="2004-06-21" OBS_VALUE="-3.87567" BBK_DIFF_A="-0.02759"/>
      <bbk:Obs TIME_PERIOD="2004-06-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-06-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-06-18" OBS_VALUE="-3.84808" BBK_DIFF_A="0.00998"/>
      <bbk:Obs TIME_PERIOD="2004-06-17" OBS_VALUE="-3.85806" BBK_DIFF_A="0.07563"/>
      <bbk:Obs TIME_PERIOD="2004-06-16" OBS_VALUE="-3.93369" BBK_DIFF_A="-0.03954"/>
      <bbk:Obs TIME_PERIOD="2004-06-15" OBS_VALUE="-3.89415" BBK_DIFF_A="-0.00824"/>
      <bbk:Obs TIME_PERIOD="2004-06-14" OBS_VALUE="-3.88591" BBK_DIFF_A="0.06809"/>
      <bbk:Obs TIME_PERIOD="2004-06-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-06-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-06-11" OBS_VALUE="-3.954" BBK_DIFF_A="-0.09975"/>
      <bbk:Obs TIME_PERIOD="2004-06-10" OBS_VALUE="-3.85425" BBK_DIFF_A="0.20209"/>
      <bbk:Obs TIME_PERIOD="2004-06-09" OBS_VALUE="-4.05634" BBK_DIFF_A="-0.05943"/>
      <bbk:Obs TIME_PERIOD="2004-06-08" OBS_VALUE="-3.99691" BBK_DIFF_A="-3.9E-4"/>
      <bbk:Obs TIME_PERIOD="2004-06-07" OBS_VALUE="-3.99652" BBK_DIFF_A="-0.15006"/>
      <bbk:Obs TIME_PERIOD="2004-06-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-06-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-06-04" OBS_VALUE="-3.84646" BBK_DIFF_A="0.16967"/>
      <bbk:Obs TIME_PERIOD="2004-06-03" OBS_VALUE="-4.01613" BBK_DIFF_A="-0.03824"/>
      <bbk:Obs TIME_PERIOD="2004-06-02" OBS_VALUE="-3.97789" BBK_DIFF_A="-0.02094"/>
      <bbk:Obs TIME_PERIOD="2004-06-01" OBS_VALUE="-3.95695" BBK_DIFF_A="-0.05577"/>
      <bbk:Obs TIME_PERIOD="2004-05-31" OBS_VALUE="-3.90118" BBK_DIFF_A="0.01883"/>
      <bbk:Obs TIME_PERIOD="2004-05-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-05-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-05-28" OBS_VALUE="-3.92001" BBK_DIFF_A="-0.01056"/>
      <bbk:Obs TIME_PERIOD="2004-05-27" OBS_VALUE="-3.90945" BBK_DIFF_A="0.00623"/>
      <bbk:Obs TIME_PERIOD="2004-05-26" OBS_VALUE="-3.91568" BBK_DIFF_A="0.10428"/>
      <bbk:Obs TIME_PERIOD="2004-05-25" OBS_VALUE="-4.01996" BBK_DIFF_A="0.07443"/>
      <bbk:Obs TIME_PERIOD="2004-05-24" OBS_VALUE="-4.09439" BBK_DIFF_A="0.06252"/>
      <bbk:Obs TIME_PERIOD="2004-05-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-05-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-05-21" OBS_VALUE="-4.15691" BBK_DIFF_A="-0.189"/>
      <bbk:Obs TIME_PERIOD="2004-05-20" OBS_VALUE="-3.96791" BBK_DIFF_A="-0.01878"/>
      <bbk:Obs TIME_PERIOD="2004-05-19" OBS_VALUE="-3.94913" BBK_DIFF_A="-0.05507"/>
      <bbk:Obs TIME_PERIOD="2004-05-18" OBS_VALUE="-3.89406" BBK_DIFF_A="-0.02892"/>
      <bbk:Obs TIME_PERIOD="2004-05-17" OBS_VALUE="-3.86514" BBK_DIFF_A="0.06409"/>
      <bbk:Obs TIME_PERIOD="2004-05-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-05-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-05-14" OBS_VALUE="-3.92923" BBK_DIFF_A="0.01332"/>
      <bbk:Obs TIME_PERIOD="2004-05-13" OBS_VALUE="-3.94255" BBK_DIFF_A="0.01805"/>
      <bbk:Obs TIME_PERIOD="2004-05-12" OBS_VALUE="-3.9606" BBK_DIFF_A="-0.04473"/>
      <bbk:Obs TIME_PERIOD="2004-05-11" OBS_VALUE="-3.91587" BBK_DIFF_A="0.01746"/>
      <bbk:Obs TIME_PERIOD="2004-05-10" OBS_VALUE="-3.93333" BBK_DIFF_A="-0.04229"/>
      <bbk:Obs TIME_PERIOD="2004-05-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-05-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-05-07" OBS_VALUE="-3.89104" BBK_DIFF_A="0.05592"/>
      <bbk:Obs TIME_PERIOD="2004-05-06" OBS_VALUE="-3.94696" BBK_DIFF_A="-0.15407"/>
      <bbk:Obs TIME_PERIOD="2004-05-05" OBS_VALUE="-3.79289" BBK_DIFF_A="0.09441"/>
      <bbk:Obs TIME_PERIOD="2004-05-04" OBS_VALUE="-3.8873" BBK_DIFF_A="0.0278"/>
      <bbk:Obs TIME_PERIOD="2004-05-03" OBS_VALUE="-3.9151" BBK_DIFF_A="-0.06702"/>
      <bbk:Obs TIME_PERIOD="2004-05-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-05-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-04-30" OBS_VALUE="-3.84808" BBK_DIFF_A="0.03105"/>
      <bbk:Obs TIME_PERIOD="2004-04-29" OBS_VALUE="-3.87913" BBK_DIFF_A="-0.05316"/>
      <bbk:Obs TIME_PERIOD="2004-04-28" OBS_VALUE="-3.82597" BBK_DIFF_A="0.02783"/>
      <bbk:Obs TIME_PERIOD="2004-04-27" OBS_VALUE="-3.8538" BBK_DIFF_A="-0.00676"/>
      <bbk:Obs TIME_PERIOD="2004-04-26" OBS_VALUE="-3.84704" BBK_DIFF_A="-0.01035"/>
      <bbk:Obs TIME_PERIOD="2004-04-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-04-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-04-23" OBS_VALUE="-3.83669" BBK_DIFF_A="0.05804"/>
      <bbk:Obs TIME_PERIOD="2004-04-22" OBS_VALUE="-3.89473" BBK_DIFF_A="-0.00434"/>
      <bbk:Obs TIME_PERIOD="2004-04-21" OBS_VALUE="-3.89039" BBK_DIFF_A="-0.01211"/>
      <bbk:Obs TIME_PERIOD="2004-04-20" OBS_VALUE="-3.87828" BBK_DIFF_A="-0.02294"/>
      <bbk:Obs TIME_PERIOD="2004-04-19" OBS_VALUE="-3.85534" BBK_DIFF_A="-0.01231"/>
      <bbk:Obs TIME_PERIOD="2004-04-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-04-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-04-16" OBS_VALUE="-3.84303" BBK_DIFF_A="0.08209"/>
      <bbk:Obs TIME_PERIOD="2004-04-15" OBS_VALUE="-3.92512" BBK_DIFF_A="-0.02985"/>
      <bbk:Obs TIME_PERIOD="2004-04-14" OBS_VALUE="-3.89527" BBK_DIFF_A="0.07827"/>
      <bbk:Obs TIME_PERIOD="2004-04-13" OBS_VALUE="-3.97354" BBK_DIFF_A="-0.18393"/>
      <bbk:Obs TIME_PERIOD="2004-04-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-04-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-04-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-04-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-04-08" OBS_VALUE="-3.78961" BBK_DIFF_A="0.00466"/>
      <bbk:Obs TIME_PERIOD="2004-04-07" OBS_VALUE="-3.79427" BBK_DIFF_A="-0.03804"/>
      <bbk:Obs TIME_PERIOD="2004-04-06" OBS_VALUE="-3.75623" BBK_DIFF_A="-0.06175"/>
      <bbk:Obs TIME_PERIOD="2004-04-05" OBS_VALUE="-3.69448" BBK_DIFF_A="0.33928"/>
      <bbk:Obs TIME_PERIOD="2004-04-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-04-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-04-02" OBS_VALUE="-4.03376" BBK_DIFF_A="-0.15094"/>
      <bbk:Obs TIME_PERIOD="2004-04-01" OBS_VALUE="-3.88282" BBK_DIFF_A="-0.05071"/>
      <bbk:Obs TIME_PERIOD="2004-03-31" OBS_VALUE="-3.83211" BBK_DIFF_A="0.00497"/>
      <bbk:Obs TIME_PERIOD="2004-03-30" OBS_VALUE="-3.83708" BBK_DIFF_A="0.46707"/>
      <bbk:Obs TIME_PERIOD="2004-03-29" OBS_VALUE="-4.30415" BBK_DIFF_A="-0.39555"/>
      <bbk:Obs TIME_PERIOD="2004-03-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-03-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-03-26" OBS_VALUE="-3.9086" BBK_DIFF_A="-0.14522"/>
      <bbk:Obs TIME_PERIOD="2004-03-25" OBS_VALUE="-3.76338" BBK_DIFF_A="-0.14935"/>
      <bbk:Obs TIME_PERIOD="2004-03-24" OBS_VALUE="-3.61403" BBK_DIFF_A="0.17017"/>
      <bbk:Obs TIME_PERIOD="2004-03-23" OBS_VALUE="-3.7842" BBK_DIFF_A="0.01488"/>
      <bbk:Obs TIME_PERIOD="2004-03-22" OBS_VALUE="-3.79908" BBK_DIFF_A="-0.03171"/>
      <bbk:Obs TIME_PERIOD="2004-03-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-03-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-03-19" OBS_VALUE="-3.76737" BBK_DIFF_A="-0.01693"/>
      <bbk:Obs TIME_PERIOD="2004-03-18" OBS_VALUE="-3.75044" BBK_DIFF_A="-0.02858"/>
      <bbk:Obs TIME_PERIOD="2004-03-17" OBS_VALUE="-3.72186" BBK_DIFF_A="0.03434"/>
      <bbk:Obs TIME_PERIOD="2004-03-16" OBS_VALUE="-3.7562" BBK_DIFF_A="-0.05316"/>
      <bbk:Obs TIME_PERIOD="2004-03-15" OBS_VALUE="-3.70304" BBK_DIFF_A="-0.07993"/>
      <bbk:Obs TIME_PERIOD="2004-03-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-03-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-03-12" OBS_VALUE="-3.62311" BBK_DIFF_A="-0.08468"/>
      <bbk:Obs TIME_PERIOD="2004-03-11" OBS_VALUE="-3.53843" BBK_DIFF_A="0.09302"/>
      <bbk:Obs TIME_PERIOD="2004-03-10" OBS_VALUE="-3.63145" BBK_DIFF_A="0.03826"/>
      <bbk:Obs TIME_PERIOD="2004-03-09" OBS_VALUE="-3.66971" BBK_DIFF_A="0.18715"/>
      <bbk:Obs TIME_PERIOD="2004-03-08" OBS_VALUE="-3.85686" BBK_DIFF_A="0.52823"/>
      <bbk:Obs TIME_PERIOD="2004-03-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-03-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-03-05" OBS_VALUE="-4.38509" BBK_DIFF_A="-0.54107"/>
      <bbk:Obs TIME_PERIOD="2004-03-04" OBS_VALUE="-3.84402" BBK_DIFF_A="-0.001"/>
      <bbk:Obs TIME_PERIOD="2004-03-03" OBS_VALUE="-3.84302" BBK_DIFF_A="-0.02283"/>
      <bbk:Obs TIME_PERIOD="2004-03-02" OBS_VALUE="-3.82019" BBK_DIFF_A="0.19591"/>
      <bbk:Obs TIME_PERIOD="2004-03-01" OBS_VALUE="-4.0161" BBK_DIFF_A="-0.19308"/>
      <bbk:Obs TIME_PERIOD="2004-02-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-02-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-02-27" OBS_VALUE="-3.82302" BBK_DIFF_A="0.06746"/>
      <bbk:Obs TIME_PERIOD="2004-02-26" OBS_VALUE="-3.89048" BBK_DIFF_A="-0.18134"/>
      <bbk:Obs TIME_PERIOD="2004-02-25" OBS_VALUE="-3.70914" BBK_DIFF_A="0.13951"/>
      <bbk:Obs TIME_PERIOD="2004-02-24" OBS_VALUE="-3.84865" BBK_DIFF_A="0.06231"/>
      <bbk:Obs TIME_PERIOD="2004-02-23" OBS_VALUE="-3.91096" BBK_DIFF_A="0.03819"/>
      <bbk:Obs TIME_PERIOD="2004-02-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-02-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-02-20" OBS_VALUE="-3.94915" BBK_DIFF_A="-0.04145"/>
      <bbk:Obs TIME_PERIOD="2004-02-19" OBS_VALUE="-3.9077" BBK_DIFF_A="-0.09842"/>
      <bbk:Obs TIME_PERIOD="2004-02-18" OBS_VALUE="-3.80928" BBK_DIFF_A="-0.05253"/>
      <bbk:Obs TIME_PERIOD="2004-02-17" OBS_VALUE="-3.75675" BBK_DIFF_A="0.39684"/>
      <bbk:Obs TIME_PERIOD="2004-02-16" OBS_VALUE="-4.15359" BBK_DIFF_A="-0.41818"/>
      <bbk:Obs TIME_PERIOD="2004-02-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-02-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-02-13" OBS_VALUE="-3.73541" BBK_DIFF_A="0.01446"/>
      <bbk:Obs TIME_PERIOD="2004-02-12" OBS_VALUE="-3.74987" BBK_DIFF_A="0.11403"/>
      <bbk:Obs TIME_PERIOD="2004-02-11" OBS_VALUE="-3.8639" BBK_DIFF_A="-0.10785"/>
      <bbk:Obs TIME_PERIOD="2004-02-10" OBS_VALUE="-3.75605" BBK_DIFF_A="-0.04624"/>
      <bbk:Obs TIME_PERIOD="2004-02-09" OBS_VALUE="-3.70981" BBK_DIFF_A="0.02211"/>
      <bbk:Obs TIME_PERIOD="2004-02-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-02-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-02-06" OBS_VALUE="-3.73192" BBK_DIFF_A="0.0697"/>
      <bbk:Obs TIME_PERIOD="2004-02-05" OBS_VALUE="-3.80162" BBK_DIFF_A="0.00345"/>
      <bbk:Obs TIME_PERIOD="2004-02-04" OBS_VALUE="-3.80507" BBK_DIFF_A="-0.01074"/>
      <bbk:Obs TIME_PERIOD="2004-02-03" OBS_VALUE="-3.79433" BBK_DIFF_A="0.02321"/>
      <bbk:Obs TIME_PERIOD="2004-02-02" OBS_VALUE="-3.81754" BBK_DIFF_A="0.04735"/>
      <bbk:Obs TIME_PERIOD="2004-02-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-01-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-01-30" OBS_VALUE="-3.86489" BBK_DIFF_A="0.25232"/>
      <bbk:Obs TIME_PERIOD="2004-01-29" OBS_VALUE="-4.11721" BBK_DIFF_A="-0.2969"/>
      <bbk:Obs TIME_PERIOD="2004-01-28" OBS_VALUE="-3.82031" BBK_DIFF_A="-0.00101"/>
      <bbk:Obs TIME_PERIOD="2004-01-27" OBS_VALUE="-3.8193" BBK_DIFF_A="0.01009"/>
      <bbk:Obs TIME_PERIOD="2004-01-26" OBS_VALUE="-3.82939" BBK_DIFF_A="-0.16384"/>
      <bbk:Obs TIME_PERIOD="2004-01-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-01-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-01-23" OBS_VALUE="-3.66555" BBK_DIFF_A="0.12397"/>
      <bbk:Obs TIME_PERIOD="2004-01-22" OBS_VALUE="-3.78952" BBK_DIFF_A="-0.06702"/>
      <bbk:Obs TIME_PERIOD="2004-01-21" OBS_VALUE="-3.7225" BBK_DIFF_A="0.19069"/>
      <bbk:Obs TIME_PERIOD="2004-01-20" OBS_VALUE="-3.91319" BBK_DIFF_A="-0.19901"/>
      <bbk:Obs TIME_PERIOD="2004-01-19" OBS_VALUE="-3.71418" BBK_DIFF_A="-0.10799"/>
      <bbk:Obs TIME_PERIOD="2004-01-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-01-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-01-16" OBS_VALUE="-3.60619" BBK_DIFF_A="0.18048"/>
      <bbk:Obs TIME_PERIOD="2004-01-15" OBS_VALUE="-3.78667" BBK_DIFF_A="0.05234"/>
      <bbk:Obs TIME_PERIOD="2004-01-14" OBS_VALUE="-3.83901" BBK_DIFF_A="-0.04499"/>
      <bbk:Obs TIME_PERIOD="2004-01-13" OBS_VALUE="-3.79402" BBK_DIFF_A="0.00641"/>
      <bbk:Obs TIME_PERIOD="2004-01-12" OBS_VALUE="-3.80043" BBK_DIFF_A="0.06206"/>
      <bbk:Obs TIME_PERIOD="2004-01-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-01-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-01-09" OBS_VALUE="-3.86249" BBK_DIFF_A="0.02667"/>
      <bbk:Obs TIME_PERIOD="2004-01-08" OBS_VALUE="-3.88916" BBK_DIFF_A="-0.1365"/>
      <bbk:Obs TIME_PERIOD="2004-01-07" OBS_VALUE="-3.75266" BBK_DIFF_A="-0.14571"/>
      <bbk:Obs TIME_PERIOD="2004-01-06" OBS_VALUE="-3.60695" BBK_DIFF_A="0.27506"/>
      <bbk:Obs TIME_PERIOD="2004-01-05" OBS_VALUE="-3.88201" BBK_DIFF_A="-0.26781"/>
      <bbk:Obs TIME_PERIOD="2004-01-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-01-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-01-02" OBS_VALUE="-3.6142" BBK_DIFF_A="0.21094"/>
      <bbk:Obs TIME_PERIOD="2004-01-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-12-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-12-30" OBS_VALUE="-3.82514" BBK_DIFF_A="-0.21718"/>
      <bbk:Obs TIME_PERIOD="2003-12-29" OBS_VALUE="-3.60796" BBK_DIFF_A="0.17664"/>
      <bbk:Obs TIME_PERIOD="2003-12-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-12-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-12-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-12-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-12-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-12-23" OBS_VALUE="-3.7846" BBK_DIFF_A="-0.04867"/>
      <bbk:Obs TIME_PERIOD="2003-12-22" OBS_VALUE="-3.73593" BBK_DIFF_A="0.02894"/>
      <bbk:Obs TIME_PERIOD="2003-12-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-12-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-12-19" OBS_VALUE="-3.76487" BBK_DIFF_A="0.01689"/>
      <bbk:Obs TIME_PERIOD="2003-12-18" OBS_VALUE="-3.78176" BBK_DIFF_A="0.02309"/>
      <bbk:Obs TIME_PERIOD="2003-12-17" OBS_VALUE="-3.80485" BBK_DIFF_A="0.09981"/>
      <bbk:Obs TIME_PERIOD="2003-12-16" OBS_VALUE="-3.90466" BBK_DIFF_A="0.19021"/>
      <bbk:Obs TIME_PERIOD="2003-12-15" OBS_VALUE="-4.09487" BBK_DIFF_A="-0.06274"/>
      <bbk:Obs TIME_PERIOD="2003-12-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-12-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-12-12" OBS_VALUE="-4.03213" BBK_DIFF_A="0.01329"/>
      <bbk:Obs TIME_PERIOD="2003-12-11" OBS_VALUE="-4.04542" BBK_DIFF_A="0.28785"/>
      <bbk:Obs TIME_PERIOD="2003-12-10" OBS_VALUE="-4.33327" BBK_DIFF_A="-0.17748"/>
      <bbk:Obs TIME_PERIOD="2003-12-09" OBS_VALUE="-4.15579" BBK_DIFF_A="-0.12714"/>
      <bbk:Obs TIME_PERIOD="2003-12-08" OBS_VALUE="-4.02865" BBK_DIFF_A="0.04276"/>
      <bbk:Obs TIME_PERIOD="2003-12-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-12-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-12-05" OBS_VALUE="-4.07141" BBK_DIFF_A="0.16185"/>
      <bbk:Obs TIME_PERIOD="2003-12-04" OBS_VALUE="-4.23326" BBK_DIFF_A="-0.20674"/>
      <bbk:Obs TIME_PERIOD="2003-12-03" OBS_VALUE="-4.02652" BBK_DIFF_A="-0.16267"/>
      <bbk:Obs TIME_PERIOD="2003-12-02" OBS_VALUE="-3.86385" BBK_DIFF_A="1.3478"/>
      <bbk:Obs TIME_PERIOD="2003-12-01" OBS_VALUE="-5.21165" BBK_DIFF_A="-1.31438"/>
      <bbk:Obs TIME_PERIOD="2003-11-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-11-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-11-28" OBS_VALUE="-3.89727" BBK_DIFF_A="-0.16542"/>
      <bbk:Obs TIME_PERIOD="2003-11-27" OBS_VALUE="-3.73185" BBK_DIFF_A="0.42253"/>
      <bbk:Obs TIME_PERIOD="2003-11-26" OBS_VALUE="-4.15438" BBK_DIFF_A="-0.08805"/>
      <bbk:Obs TIME_PERIOD="2003-11-25" OBS_VALUE="-4.06633" BBK_DIFF_A="-0.05119"/>
      <bbk:Obs TIME_PERIOD="2003-11-24" OBS_VALUE="-4.01514" BBK_DIFF_A="-0.04536"/>
      <bbk:Obs TIME_PERIOD="2003-11-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-11-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-11-21" OBS_VALUE="-3.96978" BBK_DIFF_A="0.05938"/>
      <bbk:Obs TIME_PERIOD="2003-11-20" OBS_VALUE="-4.02916" BBK_DIFF_A="-0.03947"/>
      <bbk:Obs TIME_PERIOD="2003-11-19" OBS_VALUE="-3.98969" BBK_DIFF_A="-0.1539"/>
      <bbk:Obs TIME_PERIOD="2003-11-18" OBS_VALUE="-3.83579" BBK_DIFF_A="0.00143"/>
      <bbk:Obs TIME_PERIOD="2003-11-17" OBS_VALUE="-3.83722" BBK_DIFF_A="0.35056"/>
      <bbk:Obs TIME_PERIOD="2003-11-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-11-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-11-14" OBS_VALUE="-4.18778" BBK_DIFF_A="0.18948"/>
      <bbk:Obs TIME_PERIOD="2003-11-13" OBS_VALUE="-4.37726" BBK_DIFF_A="-0.39003"/>
      <bbk:Obs TIME_PERIOD="2003-11-12" OBS_VALUE="-3.98723" BBK_DIFF_A="0.01715"/>
      <bbk:Obs TIME_PERIOD="2003-11-11" OBS_VALUE="-4.00438" BBK_DIFF_A="-0.04688"/>
      <bbk:Obs TIME_PERIOD="2003-11-10" OBS_VALUE="-3.9575" BBK_DIFF_A="-0.02793"/>
      <bbk:Obs TIME_PERIOD="2003-11-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-11-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-11-07" OBS_VALUE="-3.92957" BBK_DIFF_A="0.59375"/>
      <bbk:Obs TIME_PERIOD="2003-11-06" OBS_VALUE="-4.52332" BBK_DIFF_A="-0.73497"/>
      <bbk:Obs TIME_PERIOD="2003-11-05" OBS_VALUE="-3.78835" BBK_DIFF_A="0.07194"/>
      <bbk:Obs TIME_PERIOD="2003-11-04" OBS_VALUE="-3.86029" BBK_DIFF_A="0.12891"/>
      <bbk:Obs TIME_PERIOD="2003-11-03" OBS_VALUE="-3.9892" BBK_DIFF_A="-0.08313"/>
      <bbk:Obs TIME_PERIOD="2003-11-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-11-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-10-31" OBS_VALUE="-3.90607" BBK_DIFF_A="0.07861"/>
      <bbk:Obs TIME_PERIOD="2003-10-30" OBS_VALUE="-3.98468" BBK_DIFF_A="0.05252"/>
      <bbk:Obs TIME_PERIOD="2003-10-29" OBS_VALUE="-4.0372" BBK_DIFF_A="0.36087"/>
      <bbk:Obs TIME_PERIOD="2003-10-28" OBS_VALUE="-4.39807" BBK_DIFF_A="-0.57636"/>
      <bbk:Obs TIME_PERIOD="2003-10-27" OBS_VALUE="-3.82171" BBK_DIFF_A="0.18462"/>
      <bbk:Obs TIME_PERIOD="2003-10-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-10-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-10-24" OBS_VALUE="-4.00633" BBK_DIFF_A="-0.13721"/>
      <bbk:Obs TIME_PERIOD="2003-10-23" OBS_VALUE="-3.86912" BBK_DIFF_A="0.13295"/>
      <bbk:Obs TIME_PERIOD="2003-10-22" OBS_VALUE="-4.00207" BBK_DIFF_A="0.15827"/>
      <bbk:Obs TIME_PERIOD="2003-10-21" OBS_VALUE="-4.16034" BBK_DIFF_A="-0.22219"/>
      <bbk:Obs TIME_PERIOD="2003-10-20" OBS_VALUE="-3.93815" BBK_DIFF_A="-0.06695"/>
      <bbk:Obs TIME_PERIOD="2003-10-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-10-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-10-17" OBS_VALUE="-3.8712" BBK_DIFF_A="0.14975"/>
      <bbk:Obs TIME_PERIOD="2003-10-16" OBS_VALUE="-4.02095" BBK_DIFF_A="-0.04912"/>
      <bbk:Obs TIME_PERIOD="2003-10-15" OBS_VALUE="-3.97183" BBK_DIFF_A="-0.04774"/>
      <bbk:Obs TIME_PERIOD="2003-10-14" OBS_VALUE="-3.92409" BBK_DIFF_A="0.15021"/>
      <bbk:Obs TIME_PERIOD="2003-10-13" OBS_VALUE="-4.0743" BBK_DIFF_A="-0.21685"/>
      <bbk:Obs TIME_PERIOD="2003-10-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-10-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-10-10" OBS_VALUE="-3.85745" BBK_DIFF_A="0.07463"/>
      <bbk:Obs TIME_PERIOD="2003-10-09" OBS_VALUE="-3.93208" BBK_DIFF_A="0.07574"/>
      <bbk:Obs TIME_PERIOD="2003-10-08" OBS_VALUE="-4.00782" BBK_DIFF_A="-0.05586"/>
      <bbk:Obs TIME_PERIOD="2003-10-07" OBS_VALUE="-3.95196" BBK_DIFF_A="0.14141"/>
      <bbk:Obs TIME_PERIOD="2003-10-06" OBS_VALUE="-4.09337" BBK_DIFF_A="-0.19096"/>
      <bbk:Obs TIME_PERIOD="2003-10-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-10-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-10-03" OBS_VALUE="-3.90241" BBK_DIFF_A="0.09613"/>
      <bbk:Obs TIME_PERIOD="2003-10-02" OBS_VALUE="-3.99854" BBK_DIFF_A="0.02861"/>
      <bbk:Obs TIME_PERIOD="2003-10-01" OBS_VALUE="-4.02715" BBK_DIFF_A="-0.19312"/>
      <bbk:Obs TIME_PERIOD="2003-09-30" OBS_VALUE="-3.83403" BBK_DIFF_A="0.06261"/>
      <bbk:Obs TIME_PERIOD="2003-09-29" OBS_VALUE="-3.89664" BBK_DIFF_A="0.02764"/>
      <bbk:Obs TIME_PERIOD="2003-09-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-09-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-09-26" OBS_VALUE="-3.92428" BBK_DIFF_A="-0.05123"/>
      <bbk:Obs TIME_PERIOD="2003-09-25" OBS_VALUE="-3.87305" BBK_DIFF_A="-0.03138"/>
      <bbk:Obs TIME_PERIOD="2003-09-24" OBS_VALUE="-3.84167" BBK_DIFF_A="0.05098"/>
      <bbk:Obs TIME_PERIOD="2003-09-23" OBS_VALUE="-3.89265" BBK_DIFF_A="-0.06301"/>
      <bbk:Obs TIME_PERIOD="2003-09-22" OBS_VALUE="-3.82964" BBK_DIFF_A="-0.02126"/>
      <bbk:Obs TIME_PERIOD="2003-09-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-09-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-09-19" OBS_VALUE="-3.80838" BBK_DIFF_A="0.15831"/>
      <bbk:Obs TIME_PERIOD="2003-09-18" OBS_VALUE="-3.96669" BBK_DIFF_A="-0.08152"/>
      <bbk:Obs TIME_PERIOD="2003-09-17" OBS_VALUE="-3.88517" BBK_DIFF_A="-0.03143"/>
      <bbk:Obs TIME_PERIOD="2003-09-16" OBS_VALUE="-3.85374" BBK_DIFF_A="0.07541"/>
      <bbk:Obs TIME_PERIOD="2003-09-15" OBS_VALUE="-3.92915" BBK_DIFF_A="0.03885"/>
      <bbk:Obs TIME_PERIOD="2003-09-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-09-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-09-12" OBS_VALUE="-3.968" BBK_DIFF_A="0.02143"/>
      <bbk:Obs TIME_PERIOD="2003-09-11" OBS_VALUE="-3.98943" BBK_DIFF_A="0.03313"/>
      <bbk:Obs TIME_PERIOD="2003-09-10" OBS_VALUE="-4.02256" BBK_DIFF_A="-0.18449"/>
      <bbk:Obs TIME_PERIOD="2003-09-09" OBS_VALUE="-3.83807" BBK_DIFF_A="0.0279"/>
      <bbk:Obs TIME_PERIOD="2003-09-08" OBS_VALUE="-3.86597" BBK_DIFF_A="0.02077"/>
      <bbk:Obs TIME_PERIOD="2003-09-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-09-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-09-05" OBS_VALUE="-3.88674" BBK_DIFF_A="0.20561"/>
      <bbk:Obs TIME_PERIOD="2003-09-04" OBS_VALUE="-4.09235" BBK_DIFF_A="0.68535"/>
      <bbk:Obs TIME_PERIOD="2003-09-03" OBS_VALUE="-4.7777" BBK_DIFF_A="-0.76038"/>
      <bbk:Obs TIME_PERIOD="2003-09-02" OBS_VALUE="-4.01732" BBK_DIFF_A="-0.10147"/>
      <bbk:Obs TIME_PERIOD="2003-09-01" OBS_VALUE="-3.91585" BBK_DIFF_A="-0.07211"/>
      <bbk:Obs TIME_PERIOD="2003-08-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-08-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-08-29" OBS_VALUE="-3.84374" BBK_DIFF_A="0.11754"/>
      <bbk:Obs TIME_PERIOD="2003-08-28" OBS_VALUE="-3.96128" BBK_DIFF_A="-0.08629"/>
      <bbk:Obs TIME_PERIOD="2003-08-27" OBS_VALUE="-3.87499" BBK_DIFF_A="0.08288"/>
      <bbk:Obs TIME_PERIOD="2003-08-26" OBS_VALUE="-3.95787" BBK_DIFF_A="-0.02662"/>
      <bbk:Obs TIME_PERIOD="2003-08-25" OBS_VALUE="-3.93125" BBK_DIFF_A="0.02064"/>
      <bbk:Obs TIME_PERIOD="2003-08-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-08-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-08-22" OBS_VALUE="-3.95189" BBK_DIFF_A="-0.049"/>
      <bbk:Obs TIME_PERIOD="2003-08-21" OBS_VALUE="-3.90289" BBK_DIFF_A="-0.10957"/>
      <bbk:Obs TIME_PERIOD="2003-08-20" OBS_VALUE="-3.79332" BBK_DIFF_A="0.08416"/>
      <bbk:Obs TIME_PERIOD="2003-08-19" OBS_VALUE="-3.87748" BBK_DIFF_A="0.11373"/>
      <bbk:Obs TIME_PERIOD="2003-08-18" OBS_VALUE="-3.99121" BBK_DIFF_A="-0.00235"/>
      <bbk:Obs TIME_PERIOD="2003-08-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-08-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-08-15" OBS_VALUE="-3.98886" BBK_DIFF_A="-0.08107"/>
      <bbk:Obs TIME_PERIOD="2003-08-14" OBS_VALUE="-3.90779" BBK_DIFF_A="0.04442"/>
      <bbk:Obs TIME_PERIOD="2003-08-13" OBS_VALUE="-3.95221" BBK_DIFF_A="0.20253"/>
      <bbk:Obs TIME_PERIOD="2003-08-12" OBS_VALUE="-4.15474" BBK_DIFF_A="-0.18897"/>
      <bbk:Obs TIME_PERIOD="2003-08-11" OBS_VALUE="-3.96577" BBK_DIFF_A="-0.11019"/>
      <bbk:Obs TIME_PERIOD="2003-08-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-08-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-08-08" OBS_VALUE="-3.85558" BBK_DIFF_A="-0.06805"/>
      <bbk:Obs TIME_PERIOD="2003-08-07" OBS_VALUE="-3.78753" BBK_DIFF_A="0.3099"/>
      <bbk:Obs TIME_PERIOD="2003-08-06" OBS_VALUE="-4.09743" BBK_DIFF_A="-0.03407"/>
      <bbk:Obs TIME_PERIOD="2003-08-05" OBS_VALUE="-4.06336" BBK_DIFF_A="-0.39372"/>
      <bbk:Obs TIME_PERIOD="2003-08-04" OBS_VALUE="-3.66964" BBK_DIFF_A="0.46083"/>
      <bbk:Obs TIME_PERIOD="2003-08-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-08-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-08-01" OBS_VALUE="-4.13047" BBK_DIFF_A="-0.22901"/>
      <bbk:Obs TIME_PERIOD="2003-07-31" OBS_VALUE="-3.90146" BBK_DIFF_A="0.20202"/>
      <bbk:Obs TIME_PERIOD="2003-07-30" OBS_VALUE="-4.10348" BBK_DIFF_A="-0.09958"/>
      <bbk:Obs TIME_PERIOD="2003-07-29" OBS_VALUE="-4.0039" BBK_DIFF_A="-0.03983"/>
      <bbk:Obs TIME_PERIOD="2003-07-28" OBS_VALUE="-3.96407" BBK_DIFF_A="-0.07328"/>
      <bbk:Obs TIME_PERIOD="2003-07-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-07-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-07-25" OBS_VALUE="-3.89079" BBK_DIFF_A="-0.02503"/>
      <bbk:Obs TIME_PERIOD="2003-07-24" OBS_VALUE="-3.86576" BBK_DIFF_A="0.02866"/>
      <bbk:Obs TIME_PERIOD="2003-07-23" OBS_VALUE="-3.89442" BBK_DIFF_A="0.06237"/>
      <bbk:Obs TIME_PERIOD="2003-07-22" OBS_VALUE="-3.95679" BBK_DIFF_A="0.08124"/>
      <bbk:Obs TIME_PERIOD="2003-07-21" OBS_VALUE="-4.03803" BBK_DIFF_A="0.02443"/>
      <bbk:Obs TIME_PERIOD="2003-07-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-07-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-07-18" OBS_VALUE="-4.06246" BBK_DIFF_A="0.00899"/>
      <bbk:Obs TIME_PERIOD="2003-07-17" OBS_VALUE="-4.07145" BBK_DIFF_A="-0.10322"/>
      <bbk:Obs TIME_PERIOD="2003-07-16" OBS_VALUE="-3.96823" BBK_DIFF_A="0.02039"/>
      <bbk:Obs TIME_PERIOD="2003-07-15" OBS_VALUE="-3.98862" BBK_DIFF_A="-0.03211"/>
      <bbk:Obs TIME_PERIOD="2003-07-14" OBS_VALUE="-3.95651" BBK_DIFF_A="-0.10554"/>
      <bbk:Obs TIME_PERIOD="2003-07-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-07-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-07-11" OBS_VALUE="-3.85097" BBK_DIFF_A="0.24317"/>
      <bbk:Obs TIME_PERIOD="2003-07-10" OBS_VALUE="-4.09414" BBK_DIFF_A="-0.23194"/>
      <bbk:Obs TIME_PERIOD="2003-07-09" OBS_VALUE="-3.8622" BBK_DIFF_A="0.03508"/>
      <bbk:Obs TIME_PERIOD="2003-07-08" OBS_VALUE="-3.89728" BBK_DIFF_A="-0.04726"/>
      <bbk:Obs TIME_PERIOD="2003-07-07" OBS_VALUE="-3.85002" BBK_DIFF_A="-0.06236"/>
      <bbk:Obs TIME_PERIOD="2003-07-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-07-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-07-04" OBS_VALUE="-3.78766" BBK_DIFF_A="0.01163"/>
      <bbk:Obs TIME_PERIOD="2003-07-03" OBS_VALUE="-3.79929" BBK_DIFF_A="0.04514"/>
      <bbk:Obs TIME_PERIOD="2003-07-02" OBS_VALUE="-3.84443" BBK_DIFF_A="-0.05158"/>
      <bbk:Obs TIME_PERIOD="2003-07-01" OBS_VALUE="-3.79285" BBK_DIFF_A="0.01453"/>
      <bbk:Obs TIME_PERIOD="2003-06-30" OBS_VALUE="-3.80738" BBK_DIFF_A="-0.05921"/>
      <bbk:Obs TIME_PERIOD="2003-06-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-06-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-06-27" OBS_VALUE="-3.74817" BBK_DIFF_A="-0.10701"/>
      <bbk:Obs TIME_PERIOD="2003-06-26" OBS_VALUE="-3.64116" BBK_DIFF_A="-0.01987"/>
      <bbk:Obs TIME_PERIOD="2003-06-25" OBS_VALUE="-3.62129" BBK_DIFF_A="0.0532"/>
      <bbk:Obs TIME_PERIOD="2003-06-24" OBS_VALUE="-3.67449" BBK_DIFF_A="0.03062"/>
      <bbk:Obs TIME_PERIOD="2003-06-23" OBS_VALUE="-3.70511" BBK_DIFF_A="-0.128"/>
      <bbk:Obs TIME_PERIOD="2003-06-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-06-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-06-20" OBS_VALUE="-3.57711" BBK_DIFF_A="-0.0365"/>
      <bbk:Obs TIME_PERIOD="2003-06-19" OBS_VALUE="-3.54061" BBK_DIFF_A="0.12024"/>
      <bbk:Obs TIME_PERIOD="2003-06-18" OBS_VALUE="-3.66085" BBK_DIFF_A="-0.33467"/>
      <bbk:Obs TIME_PERIOD="2003-06-17" OBS_VALUE="-3.32618" BBK_DIFF_A="0.07568"/>
      <bbk:Obs TIME_PERIOD="2003-06-16" OBS_VALUE="-3.40186" BBK_DIFF_A="0.0612"/>
      <bbk:Obs TIME_PERIOD="2003-06-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-06-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-06-13" OBS_VALUE="-3.46306" BBK_DIFF_A="0.1375"/>
      <bbk:Obs TIME_PERIOD="2003-06-12" OBS_VALUE="-3.60056" BBK_DIFF_A="-0.06065"/>
      <bbk:Obs TIME_PERIOD="2003-06-11" OBS_VALUE="-3.53991" BBK_DIFF_A="-0.08846"/>
      <bbk:Obs TIME_PERIOD="2003-06-10" OBS_VALUE="-3.45145" BBK_DIFF_A="-0.02025"/>
      <bbk:Obs TIME_PERIOD="2003-06-09" OBS_VALUE="-3.4312" BBK_DIFF_A="0.12779"/>
      <bbk:Obs TIME_PERIOD="2003-06-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-06-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-06-06" OBS_VALUE="-3.55899" BBK_DIFF_A="-0.1335"/>
      <bbk:Obs TIME_PERIOD="2003-06-05" OBS_VALUE="-3.42549" BBK_DIFF_A="-0.09103"/>
      <bbk:Obs TIME_PERIOD="2003-06-04" OBS_VALUE="-3.33446" BBK_DIFF_A="0.07667"/>
      <bbk:Obs TIME_PERIOD="2003-06-03" OBS_VALUE="-3.41113" BBK_DIFF_A="0.01743"/>
      <bbk:Obs TIME_PERIOD="2003-06-02" OBS_VALUE="-3.42856" BBK_DIFF_A="-0.13637"/>
      <bbk:Obs TIME_PERIOD="2003-06-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-05-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-05-30" OBS_VALUE="-3.29219" BBK_DIFF_A="0.21565"/>
      <bbk:Obs TIME_PERIOD="2003-05-29" OBS_VALUE="-3.50784" BBK_DIFF_A="0.11758"/>
      <bbk:Obs TIME_PERIOD="2003-05-28" OBS_VALUE="-3.62542" BBK_DIFF_A="-0.49376"/>
      <bbk:Obs TIME_PERIOD="2003-05-27" OBS_VALUE="-3.13166" BBK_DIFF_A="-0.03165"/>
      <bbk:Obs TIME_PERIOD="2003-05-26" OBS_VALUE="-3.10001" BBK_DIFF_A="0.14494"/>
      <bbk:Obs TIME_PERIOD="2003-05-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-05-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-05-23" OBS_VALUE="-3.24495" BBK_DIFF_A="-0.06235"/>
      <bbk:Obs TIME_PERIOD="2003-05-22" OBS_VALUE="-3.1826" BBK_DIFF_A="-0.01175"/>
      <bbk:Obs TIME_PERIOD="2003-05-21" OBS_VALUE="-3.17085" BBK_DIFF_A="0.00303"/>
      <bbk:Obs TIME_PERIOD="2003-05-20" OBS_VALUE="-3.17388" BBK_DIFF_A="0.19544"/>
      <bbk:Obs TIME_PERIOD="2003-05-19" OBS_VALUE="-3.36932" BBK_DIFF_A="0.05079"/>
      <bbk:Obs TIME_PERIOD="2003-05-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-05-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-05-16" OBS_VALUE="-3.42011" BBK_DIFF_A="-0.05338"/>
      <bbk:Obs TIME_PERIOD="2003-05-15" OBS_VALUE="-3.36673" BBK_DIFF_A="0.21378"/>
      <bbk:Obs TIME_PERIOD="2003-05-14" OBS_VALUE="-3.58051" BBK_DIFF_A="-0.14089"/>
      <bbk:Obs TIME_PERIOD="2003-05-13" OBS_VALUE="-3.43962" BBK_DIFF_A="-0.05098"/>
      <bbk:Obs TIME_PERIOD="2003-05-12" OBS_VALUE="-3.38864" BBK_DIFF_A="-0.09888"/>
      <bbk:Obs TIME_PERIOD="2003-05-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-05-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-05-09" OBS_VALUE="-3.28976" BBK_DIFF_A="0.63891"/>
      <bbk:Obs TIME_PERIOD="2003-05-08" OBS_VALUE="-3.92867" BBK_DIFF_A="-0.63342"/>
      <bbk:Obs TIME_PERIOD="2003-05-07" OBS_VALUE="-3.29525" BBK_DIFF_A="0.0675"/>
      <bbk:Obs TIME_PERIOD="2003-05-06" OBS_VALUE="-3.36275" BBK_DIFF_A="-0.01678"/>
      <bbk:Obs TIME_PERIOD="2003-05-05" OBS_VALUE="-3.34597" BBK_DIFF_A="-2.52922"/>
      <bbk:Obs TIME_PERIOD="2003-05-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-05-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-05-02" OBS_VALUE="-0.81675" BBK_DIFF_A="2.52078"/>
      <bbk:Obs TIME_PERIOD="2003-05-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-04-30" OBS_VALUE="-3.33753" BBK_DIFF_A="0.00792"/>
      <bbk:Obs TIME_PERIOD="2003-04-29" OBS_VALUE="-3.34545" BBK_DIFF_A="-0.05443"/>
      <bbk:Obs TIME_PERIOD="2003-04-28" OBS_VALUE="-3.29102" BBK_DIFF_A="-0.00185"/>
      <bbk:Obs TIME_PERIOD="2003-04-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-04-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-04-25" OBS_VALUE="-3.28917" BBK_DIFF_A="0.01257"/>
      <bbk:Obs TIME_PERIOD="2003-04-24" OBS_VALUE="-3.30174" BBK_DIFF_A="-0.02665"/>
      <bbk:Obs TIME_PERIOD="2003-04-23" OBS_VALUE="-3.27509" BBK_DIFF_A="-0.0753"/>
      <bbk:Obs TIME_PERIOD="2003-04-22" OBS_VALUE="-3.19979" BBK_DIFF_A="0.00467"/>
      <bbk:Obs TIME_PERIOD="2003-04-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-04-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-04-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-04-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-04-17" OBS_VALUE="-3.20446" BBK_DIFF_A="0.06863"/>
      <bbk:Obs TIME_PERIOD="2003-04-16" OBS_VALUE="-3.27309" BBK_DIFF_A="0.01265"/>
      <bbk:Obs TIME_PERIOD="2003-04-15" OBS_VALUE="-3.28574" BBK_DIFF_A="0.00805"/>
      <bbk:Obs TIME_PERIOD="2003-04-14" OBS_VALUE="-3.29379" BBK_DIFF_A="0.02155"/>
      <bbk:Obs TIME_PERIOD="2003-04-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-04-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-04-11" OBS_VALUE="-3.31534" BBK_DIFF_A="-0.07116"/>
      <bbk:Obs TIME_PERIOD="2003-04-10" OBS_VALUE="-3.24418" BBK_DIFF_A="0.02643"/>
      <bbk:Obs TIME_PERIOD="2003-04-09" OBS_VALUE="-3.27061" BBK_DIFF_A="0.03121"/>
      <bbk:Obs TIME_PERIOD="2003-04-08" OBS_VALUE="-3.30182" BBK_DIFF_A="0.04618"/>
      <bbk:Obs TIME_PERIOD="2003-04-07" OBS_VALUE="-3.348" BBK_DIFF_A="-0.03072"/>
      <bbk:Obs TIME_PERIOD="2003-04-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-04-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-04-04" OBS_VALUE="-3.31728" BBK_DIFF_A="0.04932"/>
      <bbk:Obs TIME_PERIOD="2003-04-03" OBS_VALUE="-3.3666" BBK_DIFF_A="-0.1367"/>
      <bbk:Obs TIME_PERIOD="2003-04-02" OBS_VALUE="-3.2299" BBK_DIFF_A="0.05306"/>
      <bbk:Obs TIME_PERIOD="2003-04-01" OBS_VALUE="-3.28296" BBK_DIFF_A="0.00151"/>
      <bbk:Obs TIME_PERIOD="2003-03-31" OBS_VALUE="-3.28447" BBK_DIFF_A="0.06174"/>
      <bbk:Obs TIME_PERIOD="2003-03-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-03-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-03-28" OBS_VALUE="-3.34621" BBK_DIFF_A="-0.00552"/>
      <bbk:Obs TIME_PERIOD="2003-03-27" OBS_VALUE="-3.34069" BBK_DIFF_A="-0.18059"/>
      <bbk:Obs TIME_PERIOD="2003-03-26" OBS_VALUE="-3.1601" BBK_DIFF_A="0.12979"/>
      <bbk:Obs TIME_PERIOD="2003-03-25" OBS_VALUE="-3.28989" BBK_DIFF_A="1.2604"/>
      <bbk:Obs TIME_PERIOD="2003-03-24" OBS_VALUE="-4.55029" BBK_DIFF_A="-1.18155"/>
      <bbk:Obs TIME_PERIOD="2003-03-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-03-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-03-21" OBS_VALUE="-3.36874" BBK_DIFF_A="-0.05933"/>
      <bbk:Obs TIME_PERIOD="2003-03-20" OBS_VALUE="-3.30941" BBK_DIFF_A="-0.01491"/>
      <bbk:Obs TIME_PERIOD="2003-03-19" OBS_VALUE="-3.2945" BBK_DIFF_A="0.03431"/>
      <bbk:Obs TIME_PERIOD="2003-03-18" OBS_VALUE="-3.32881" BBK_DIFF_A="-0.15778"/>
      <bbk:Obs TIME_PERIOD="2003-03-17" OBS_VALUE="-3.17103" BBK_DIFF_A="0.06849"/>
      <bbk:Obs TIME_PERIOD="2003-03-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-03-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-03-14" OBS_VALUE="-3.23952" BBK_DIFF_A="-0.06578"/>
      <bbk:Obs TIME_PERIOD="2003-03-13" OBS_VALUE="-3.17374" BBK_DIFF_A="-0.13228"/>
      <bbk:Obs TIME_PERIOD="2003-03-12" OBS_VALUE="-3.04146" BBK_DIFF_A="-0.03259"/>
      <bbk:Obs TIME_PERIOD="2003-03-11" OBS_VALUE="-3.00887" BBK_DIFF_A="-0.0357"/>
      <bbk:Obs TIME_PERIOD="2003-03-10" OBS_VALUE="-2.97317" BBK_DIFF_A="0.10731"/>
      <bbk:Obs TIME_PERIOD="2003-03-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-03-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-03-07" OBS_VALUE="-3.08048" BBK_DIFF_A="0.12304"/>
      <bbk:Obs TIME_PERIOD="2003-03-06" OBS_VALUE="-3.20352" BBK_DIFF_A="0.16614"/>
      <bbk:Obs TIME_PERIOD="2003-03-05" OBS_VALUE="-3.36966" BBK_DIFF_A="-0.19388"/>
      <bbk:Obs TIME_PERIOD="2003-03-04" OBS_VALUE="-3.17578" BBK_DIFF_A="0.06355"/>
      <bbk:Obs TIME_PERIOD="2003-03-03" OBS_VALUE="-3.23933" BBK_DIFF_A="-0.03907"/>
      <bbk:Obs TIME_PERIOD="2003-03-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-03-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-02-28" OBS_VALUE="-3.20026" BBK_DIFF_A="-4.5E-4"/>
      <bbk:Obs TIME_PERIOD="2003-02-27" OBS_VALUE="-3.19981" BBK_DIFF_A="-0.00199"/>
      <bbk:Obs TIME_PERIOD="2003-02-26" OBS_VALUE="-3.19782" BBK_DIFF_A="-0.08318"/>
      <bbk:Obs TIME_PERIOD="2003-02-25" OBS_VALUE="-3.11464" BBK_DIFF_A="0.34505"/>
      <bbk:Obs TIME_PERIOD="2003-02-24" OBS_VALUE="-3.45969" BBK_DIFF_A="-0.51314"/>
      <bbk:Obs TIME_PERIOD="2003-02-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-02-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-02-21" OBS_VALUE="-2.94655" BBK_DIFF_A="-0.05022"/>
      <bbk:Obs TIME_PERIOD="2003-02-20" OBS_VALUE="-2.89633" BBK_DIFF_A="0.03486"/>
      <bbk:Obs TIME_PERIOD="2003-02-19" OBS_VALUE="-2.93119" BBK_DIFF_A="0.03031"/>
      <bbk:Obs TIME_PERIOD="2003-02-18" OBS_VALUE="-2.9615" BBK_DIFF_A="-0.03114"/>
      <bbk:Obs TIME_PERIOD="2003-02-17" OBS_VALUE="-2.93036" BBK_DIFF_A="0.01106"/>
      <bbk:Obs TIME_PERIOD="2003-02-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-02-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-02-14" OBS_VALUE="-2.94142" BBK_DIFF_A="-0.06336"/>
      <bbk:Obs TIME_PERIOD="2003-02-13" OBS_VALUE="-2.87806" BBK_DIFF_A="-0.10657"/>
      <bbk:Obs TIME_PERIOD="2003-02-12" OBS_VALUE="-2.77149" BBK_DIFF_A="0.11766"/>
      <bbk:Obs TIME_PERIOD="2003-02-11" OBS_VALUE="-2.88915" BBK_DIFF_A="-0.06962"/>
      <bbk:Obs TIME_PERIOD="2003-02-10" OBS_VALUE="-2.81953" BBK_DIFF_A="-0.02917"/>
      <bbk:Obs TIME_PERIOD="2003-02-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-02-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-02-07" OBS_VALUE="-2.79036" BBK_DIFF_A="-0.01857"/>
      <bbk:Obs TIME_PERIOD="2003-02-06" OBS_VALUE="-2.77179" BBK_DIFF_A="-0.10749"/>
      <bbk:Obs TIME_PERIOD="2003-02-05" OBS_VALUE="-2.6643" BBK_DIFF_A="-0.06677"/>
      <bbk:Obs TIME_PERIOD="2003-02-04" OBS_VALUE="-2.59753" BBK_DIFF_A="0.05556"/>
      <bbk:Obs TIME_PERIOD="2003-02-03" OBS_VALUE="-2.65309" BBK_DIFF_A="-0.07806"/>
      <bbk:Obs TIME_PERIOD="2003-02-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-02-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-01-31" OBS_VALUE="-2.57503" BBK_DIFF_A="0.04065"/>
      <bbk:Obs TIME_PERIOD="2003-01-30" OBS_VALUE="-2.61568" BBK_DIFF_A="-0.1401"/>
      <bbk:Obs TIME_PERIOD="2003-01-29" OBS_VALUE="-2.47558" BBK_DIFF_A="0.08613"/>
      <bbk:Obs TIME_PERIOD="2003-01-28" OBS_VALUE="-2.56171" BBK_DIFF_A="-0.07712"/>
      <bbk:Obs TIME_PERIOD="2003-01-27" OBS_VALUE="-2.48459" BBK_DIFF_A="0.17806"/>
      <bbk:Obs TIME_PERIOD="2003-01-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-01-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-01-24" OBS_VALUE="-2.66265" BBK_DIFF_A="-0.02979"/>
      <bbk:Obs TIME_PERIOD="2003-01-23" OBS_VALUE="-2.63286" BBK_DIFF_A="0.03111"/>
      <bbk:Obs TIME_PERIOD="2003-01-22" OBS_VALUE="-2.66397" BBK_DIFF_A="-2.9E-4"/>
      <bbk:Obs TIME_PERIOD="2003-01-21" OBS_VALUE="-2.66368" BBK_DIFF_A="0.06066"/>
      <bbk:Obs TIME_PERIOD="2003-01-20" OBS_VALUE="-2.72434" BBK_DIFF_A="0.04124"/>
      <bbk:Obs TIME_PERIOD="2003-01-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-01-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-01-17" OBS_VALUE="-2.76558" BBK_DIFF_A="-0.16514"/>
      <bbk:Obs TIME_PERIOD="2003-01-16" OBS_VALUE="-2.60044" BBK_DIFF_A="0.10057"/>
      <bbk:Obs TIME_PERIOD="2003-01-15" OBS_VALUE="-2.70101" BBK_DIFF_A="0.0245"/>
      <bbk:Obs TIME_PERIOD="2003-01-14" OBS_VALUE="-2.72551" BBK_DIFF_A="0.08944"/>
      <bbk:Obs TIME_PERIOD="2003-01-13" OBS_VALUE="-2.81495" BBK_DIFF_A="-0.09741"/>
      <bbk:Obs TIME_PERIOD="2003-01-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-01-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-01-10" OBS_VALUE="-2.71754" BBK_DIFF_A="0.06699"/>
      <bbk:Obs TIME_PERIOD="2003-01-09" OBS_VALUE="-2.78453" BBK_DIFF_A="-0.01283"/>
      <bbk:Obs TIME_PERIOD="2003-01-08" OBS_VALUE="-2.7717" BBK_DIFF_A="0.07525"/>
      <bbk:Obs TIME_PERIOD="2003-01-07" OBS_VALUE="-2.84695" BBK_DIFF_A="0.08828"/>
      <bbk:Obs TIME_PERIOD="2003-01-06" OBS_VALUE="-2.93523" BBK_DIFF_A="-0.1092"/>
      <bbk:Obs TIME_PERIOD="2003-01-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-01-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2003-01-03" OBS_VALUE="-2.82603" BBK_DIFF_A="-0.0856"/>
      <bbk:Obs TIME_PERIOD="2003-01-02" OBS_VALUE="-2.74043" BBK_DIFF_A="0.11089"/>
      <bbk:Obs TIME_PERIOD="2003-01-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-12-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-12-30" OBS_VALUE="-2.85132" BBK_DIFF_A="-0.14322"/>
      <bbk:Obs TIME_PERIOD="2002-12-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-12-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-12-27" OBS_VALUE="-2.7081" BBK_DIFF_A="0.01737"/>
      <bbk:Obs TIME_PERIOD="2002-12-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-12-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-12-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-12-23" OBS_VALUE="-2.72547" BBK_DIFF_A="-0.02657"/>
      <bbk:Obs TIME_PERIOD="2002-12-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-12-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-12-20" OBS_VALUE="-2.6989" BBK_DIFF_A="-0.08276"/>
      <bbk:Obs TIME_PERIOD="2002-12-19" OBS_VALUE="-2.61614" BBK_DIFF_A="0.12587"/>
      <bbk:Obs TIME_PERIOD="2002-12-18" OBS_VALUE="-2.74201" BBK_DIFF_A="0.03495"/>
      <bbk:Obs TIME_PERIOD="2002-12-17" OBS_VALUE="-2.77696" BBK_DIFF_A="0.26993"/>
      <bbk:Obs TIME_PERIOD="2002-12-16" OBS_VALUE="-3.04689" BBK_DIFF_A="-0.38276"/>
      <bbk:Obs TIME_PERIOD="2002-12-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-12-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-12-13" OBS_VALUE="-2.66413" BBK_DIFF_A="-0.06682"/>
      <bbk:Obs TIME_PERIOD="2002-12-12" OBS_VALUE="-2.59731" BBK_DIFF_A="0.27791"/>
      <bbk:Obs TIME_PERIOD="2002-12-11" OBS_VALUE="-2.87522" BBK_DIFF_A="0.02734"/>
      <bbk:Obs TIME_PERIOD="2002-12-10" OBS_VALUE="-2.90256" BBK_DIFF_A="-0.01495"/>
      <bbk:Obs TIME_PERIOD="2002-12-09" OBS_VALUE="-2.88761" BBK_DIFF_A="0.03127"/>
      <bbk:Obs TIME_PERIOD="2002-12-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-12-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-12-06" OBS_VALUE="-2.91888" BBK_DIFF_A="-0.08473"/>
      <bbk:Obs TIME_PERIOD="2002-12-05" OBS_VALUE="-2.83415" BBK_DIFF_A="-0.09243"/>
      <bbk:Obs TIME_PERIOD="2002-12-04" OBS_VALUE="-2.74172" BBK_DIFF_A="-0.02686"/>
      <bbk:Obs TIME_PERIOD="2002-12-03" OBS_VALUE="-2.71486" BBK_DIFF_A="0.18597"/>
      <bbk:Obs TIME_PERIOD="2002-12-02" OBS_VALUE="-2.90083" BBK_DIFF_A="-0.00763"/>
      <bbk:Obs TIME_PERIOD="2002-12-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-11-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-11-29" OBS_VALUE="-2.8932" BBK_DIFF_A="-0.12501"/>
      <bbk:Obs TIME_PERIOD="2002-11-28" OBS_VALUE="-2.76819" BBK_DIFF_A="-0.2671"/>
      <bbk:Obs TIME_PERIOD="2002-11-27" OBS_VALUE="-2.50109" BBK_DIFF_A="0.36992"/>
      <bbk:Obs TIME_PERIOD="2002-11-26" OBS_VALUE="-2.87101" BBK_DIFF_A="-0.04152"/>
      <bbk:Obs TIME_PERIOD="2002-11-25" OBS_VALUE="-2.82949" BBK_DIFF_A="-3.88879"/>
      <bbk:Obs TIME_PERIOD="2002-11-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-11-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-11-22" OBS_VALUE="1.0593" BBK_DIFF_A="3.9303"/>
      <bbk:Obs TIME_PERIOD="2002-11-21" OBS_VALUE="-2.871" BBK_DIFF_A="-0.15949"/>
      <bbk:Obs TIME_PERIOD="2002-11-20" OBS_VALUE="-2.71151" BBK_DIFF_A="0.11683"/>
      <bbk:Obs TIME_PERIOD="2002-11-19" OBS_VALUE="-2.82834" BBK_DIFF_A="0.03497"/>
      <bbk:Obs TIME_PERIOD="2002-11-18" OBS_VALUE="-2.86331" BBK_DIFF_A="-0.19907"/>
      <bbk:Obs TIME_PERIOD="2002-11-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-11-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-11-15" OBS_VALUE="-2.66424" BBK_DIFF_A="-0.06159"/>
      <bbk:Obs TIME_PERIOD="2002-11-14" OBS_VALUE="-2.60265" BBK_DIFF_A="-0.06115"/>
      <bbk:Obs TIME_PERIOD="2002-11-13" OBS_VALUE="-2.5415" BBK_DIFF_A="-0.03272"/>
      <bbk:Obs TIME_PERIOD="2002-11-12" OBS_VALUE="-2.50878" BBK_DIFF_A="-0.01481"/>
      <bbk:Obs TIME_PERIOD="2002-11-11" OBS_VALUE="-2.49397" BBK_DIFF_A="0.17599"/>
      <bbk:Obs TIME_PERIOD="2002-11-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-11-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-11-08" OBS_VALUE="-2.66996" BBK_DIFF_A="0.09692"/>
      <bbk:Obs TIME_PERIOD="2002-11-07" OBS_VALUE="-2.76688" BBK_DIFF_A="0.0081"/>
      <bbk:Obs TIME_PERIOD="2002-11-06" OBS_VALUE="-2.77498" BBK_DIFF_A="-0.07172"/>
      <bbk:Obs TIME_PERIOD="2002-11-05" OBS_VALUE="-2.70326" BBK_DIFF_A="-0.02725"/>
      <bbk:Obs TIME_PERIOD="2002-11-04" OBS_VALUE="-2.67601" BBK_DIFF_A="-0.01294"/>
      <bbk:Obs TIME_PERIOD="2002-11-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-11-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-11-01" OBS_VALUE="-2.66307" BBK_DIFF_A="-0.02695"/>
      <bbk:Obs TIME_PERIOD="2002-10-31" OBS_VALUE="-2.63612" BBK_DIFF_A="0.10042"/>
      <bbk:Obs TIME_PERIOD="2002-10-30" OBS_VALUE="-2.73654" BBK_DIFF_A="-0.1098"/>
      <bbk:Obs TIME_PERIOD="2002-10-29" OBS_VALUE="-2.62674" BBK_DIFF_A="0.0179"/>
      <bbk:Obs TIME_PERIOD="2002-10-28" OBS_VALUE="-2.64464" BBK_DIFF_A="0.21047"/>
      <bbk:Obs TIME_PERIOD="2002-10-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-10-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-10-25" OBS_VALUE="-2.85511" BBK_DIFF_A="-0.15574"/>
      <bbk:Obs TIME_PERIOD="2002-10-24" OBS_VALUE="-2.69937" BBK_DIFF_A="-0.07996"/>
      <bbk:Obs TIME_PERIOD="2002-10-23" OBS_VALUE="-2.61941" BBK_DIFF_A="0.05746"/>
      <bbk:Obs TIME_PERIOD="2002-10-22" OBS_VALUE="-2.67687" BBK_DIFF_A="-0.18867"/>
      <bbk:Obs TIME_PERIOD="2002-10-21" OBS_VALUE="-2.4882" BBK_DIFF_A="-0.07897"/>
      <bbk:Obs TIME_PERIOD="2002-10-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-10-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-10-18" OBS_VALUE="-2.40923" BBK_DIFF_A="0.1132"/>
      <bbk:Obs TIME_PERIOD="2002-10-17" OBS_VALUE="-2.52243" BBK_DIFF_A="-0.10008"/>
      <bbk:Obs TIME_PERIOD="2002-10-16" OBS_VALUE="-2.42235" BBK_DIFF_A="0.08317"/>
      <bbk:Obs TIME_PERIOD="2002-10-15" OBS_VALUE="-2.50552" BBK_DIFF_A="0.07957"/>
      <bbk:Obs TIME_PERIOD="2002-10-14" OBS_VALUE="-2.58509" BBK_DIFF_A="-0.07924"/>
      <bbk:Obs TIME_PERIOD="2002-10-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-10-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-10-11" OBS_VALUE="-2.50585" BBK_DIFF_A="-0.06769"/>
      <bbk:Obs TIME_PERIOD="2002-10-10" OBS_VALUE="-2.43816" BBK_DIFF_A="-0.07429"/>
      <bbk:Obs TIME_PERIOD="2002-10-09" OBS_VALUE="-2.36387" BBK_DIFF_A="0.06914"/>
      <bbk:Obs TIME_PERIOD="2002-10-08" OBS_VALUE="-2.43301" BBK_DIFF_A="-0.06878"/>
      <bbk:Obs TIME_PERIOD="2002-10-07" OBS_VALUE="-2.36423" BBK_DIFF_A="0.04865"/>
      <bbk:Obs TIME_PERIOD="2002-10-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-10-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-10-04" OBS_VALUE="-2.41288" BBK_DIFF_A="0.08307"/>
      <bbk:Obs TIME_PERIOD="2002-10-03" OBS_VALUE="-2.49595" BBK_DIFF_A="-0.08449"/>
      <bbk:Obs TIME_PERIOD="2002-10-02" OBS_VALUE="-2.41146" BBK_DIFF_A="-0.01019"/>
      <bbk:Obs TIME_PERIOD="2002-10-01" OBS_VALUE="-2.40127" BBK_DIFF_A="0.00417"/>
      <bbk:Obs TIME_PERIOD="2002-09-30" OBS_VALUE="-2.40544" BBK_DIFF_A="-0.173"/>
      <bbk:Obs TIME_PERIOD="2002-09-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-09-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-09-27" OBS_VALUE="-2.23244" BBK_DIFF_A="0.19553"/>
      <bbk:Obs TIME_PERIOD="2002-09-26" OBS_VALUE="-2.42797" BBK_DIFF_A="-0.04534"/>
      <bbk:Obs TIME_PERIOD="2002-09-25" OBS_VALUE="-2.38263" BBK_DIFF_A="-0.38626"/>
      <bbk:Obs TIME_PERIOD="2002-09-24" OBS_VALUE="-1.99637" BBK_DIFF_A="0.297"/>
      <bbk:Obs TIME_PERIOD="2002-09-23" OBS_VALUE="-2.29337" BBK_DIFF_A="0.12373"/>
      <bbk:Obs TIME_PERIOD="2002-09-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-09-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-09-20" OBS_VALUE="-2.4171" BBK_DIFF_A="-0.35434"/>
      <bbk:Obs TIME_PERIOD="2002-09-19" OBS_VALUE="-2.06276" BBK_DIFF_A="0.1984"/>
      <bbk:Obs TIME_PERIOD="2002-09-18" OBS_VALUE="-2.26116" BBK_DIFF_A="-0.08015"/>
      <bbk:Obs TIME_PERIOD="2002-09-17" OBS_VALUE="-2.18101" BBK_DIFF_A="0.09787"/>
      <bbk:Obs TIME_PERIOD="2002-09-16" OBS_VALUE="-2.27888" BBK_DIFF_A="-0.13177"/>
      <bbk:Obs TIME_PERIOD="2002-09-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-09-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-09-13" OBS_VALUE="-2.14711" BBK_DIFF_A="0.08805"/>
      <bbk:Obs TIME_PERIOD="2002-09-12" OBS_VALUE="-2.23516" BBK_DIFF_A="-0.00257"/>
      <bbk:Obs TIME_PERIOD="2002-09-11" OBS_VALUE="-2.23259" BBK_DIFF_A="0.04501"/>
      <bbk:Obs TIME_PERIOD="2002-09-10" OBS_VALUE="-2.2776" BBK_DIFF_A="-0.04432"/>
      <bbk:Obs TIME_PERIOD="2002-09-09" OBS_VALUE="-2.23328" BBK_DIFF_A="-0.07072"/>
      <bbk:Obs TIME_PERIOD="2002-09-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-09-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-09-06" OBS_VALUE="-2.16256" BBK_DIFF_A="0.09705"/>
      <bbk:Obs TIME_PERIOD="2002-09-05" OBS_VALUE="-2.25961" BBK_DIFF_A="-0.05352"/>
      <bbk:Obs TIME_PERIOD="2002-09-04" OBS_VALUE="-2.20609" BBK_DIFF_A="0.1374"/>
      <bbk:Obs TIME_PERIOD="2002-09-03" OBS_VALUE="-2.34349" BBK_DIFF_A="-0.04721"/>
      <bbk:Obs TIME_PERIOD="2002-09-02" OBS_VALUE="-2.29628" BBK_DIFF_A="0.1253"/>
      <bbk:Obs TIME_PERIOD="2002-09-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-08-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-08-30" OBS_VALUE="-2.42158" BBK_DIFF_A="-0.12692"/>
      <bbk:Obs TIME_PERIOD="2002-08-29" OBS_VALUE="-2.29466" BBK_DIFF_A="0.03192"/>
      <bbk:Obs TIME_PERIOD="2002-08-28" OBS_VALUE="-2.32658" BBK_DIFF_A="0.0157"/>
      <bbk:Obs TIME_PERIOD="2002-08-27" OBS_VALUE="-2.34228" BBK_DIFF_A="0.02762"/>
      <bbk:Obs TIME_PERIOD="2002-08-26" OBS_VALUE="-2.3699" BBK_DIFF_A="-0.00243"/>
      <bbk:Obs TIME_PERIOD="2002-08-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-08-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-08-23" OBS_VALUE="-2.36747" BBK_DIFF_A="-0.00358"/>
      <bbk:Obs TIME_PERIOD="2002-08-22" OBS_VALUE="-2.36389" BBK_DIFF_A="-0.03144"/>
      <bbk:Obs TIME_PERIOD="2002-08-21" OBS_VALUE="-2.33245" BBK_DIFF_A="-0.03043"/>
      <bbk:Obs TIME_PERIOD="2002-08-20" OBS_VALUE="-2.30202" BBK_DIFF_A="-0.05022"/>
      <bbk:Obs TIME_PERIOD="2002-08-19" OBS_VALUE="-2.2518" BBK_DIFF_A="-0.00558"/>
      <bbk:Obs TIME_PERIOD="2002-08-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-08-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-08-16" OBS_VALUE="-2.24622" BBK_DIFF_A="0.04021"/>
      <bbk:Obs TIME_PERIOD="2002-08-15" OBS_VALUE="-2.28643" BBK_DIFF_A="-0.09474"/>
      <bbk:Obs TIME_PERIOD="2002-08-14" OBS_VALUE="-2.19169" BBK_DIFF_A="-0.0456"/>
      <bbk:Obs TIME_PERIOD="2002-08-13" OBS_VALUE="-2.14609" BBK_DIFF_A="0.03652"/>
      <bbk:Obs TIME_PERIOD="2002-08-12" OBS_VALUE="-2.18261" BBK_DIFF_A="-0.01485"/>
      <bbk:Obs TIME_PERIOD="2002-08-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-08-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-08-09" OBS_VALUE="-2.16776" BBK_DIFF_A="0.12505"/>
      <bbk:Obs TIME_PERIOD="2002-08-08" OBS_VALUE="-2.29281" BBK_DIFF_A="0.07779"/>
      <bbk:Obs TIME_PERIOD="2002-08-07" OBS_VALUE="-2.3706" BBK_DIFF_A="-0.08752"/>
      <bbk:Obs TIME_PERIOD="2002-08-06" OBS_VALUE="-2.28308" BBK_DIFF_A="-0.02969"/>
      <bbk:Obs TIME_PERIOD="2002-08-05" OBS_VALUE="-2.25339" BBK_DIFF_A="0.08861"/>
      <bbk:Obs TIME_PERIOD="2002-08-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-08-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-08-02" OBS_VALUE="-2.342" BBK_DIFF_A="0.07925"/>
      <bbk:Obs TIME_PERIOD="2002-08-01" OBS_VALUE="-2.42125" BBK_DIFF_A="0.1324"/>
      <bbk:Obs TIME_PERIOD="2002-07-31" OBS_VALUE="-2.55365" BBK_DIFF_A="0.05479"/>
      <bbk:Obs TIME_PERIOD="2002-07-30" OBS_VALUE="-2.60844" BBK_DIFF_A="-0.11322"/>
      <bbk:Obs TIME_PERIOD="2002-07-29" OBS_VALUE="-2.49522" BBK_DIFF_A="-0.15324"/>
      <bbk:Obs TIME_PERIOD="2002-07-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-07-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-07-26" OBS_VALUE="-2.34198" BBK_DIFF_A="-0.07223"/>
      <bbk:Obs TIME_PERIOD="2002-07-25" OBS_VALUE="-2.26975" BBK_DIFF_A="0.05684"/>
      <bbk:Obs TIME_PERIOD="2002-07-24" OBS_VALUE="-2.32659" BBK_DIFF_A="0.06739"/>
      <bbk:Obs TIME_PERIOD="2002-07-23" OBS_VALUE="-2.39398" BBK_DIFF_A="0.0407"/>
      <bbk:Obs TIME_PERIOD="2002-07-22" OBS_VALUE="-2.43468" BBK_DIFF_A="0.05431"/>
      <bbk:Obs TIME_PERIOD="2002-07-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-07-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-07-19" OBS_VALUE="-2.48899" BBK_DIFF_A="0.09491"/>
      <bbk:Obs TIME_PERIOD="2002-07-18" OBS_VALUE="-2.5839" BBK_DIFF_A="-0.0415"/>
      <bbk:Obs TIME_PERIOD="2002-07-17" OBS_VALUE="-2.5424" BBK_DIFF_A="-0.17375"/>
      <bbk:Obs TIME_PERIOD="2002-07-16" OBS_VALUE="-2.36865" BBK_DIFF_A="0.07437"/>
      <bbk:Obs TIME_PERIOD="2002-07-15" OBS_VALUE="-2.44302" BBK_DIFF_A="0.0834"/>
      <bbk:Obs TIME_PERIOD="2002-07-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-07-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-07-12" OBS_VALUE="-2.52642" BBK_DIFF_A="-0.01071"/>
      <bbk:Obs TIME_PERIOD="2002-07-11" OBS_VALUE="-2.51571" BBK_DIFF_A="0.06927"/>
      <bbk:Obs TIME_PERIOD="2002-07-10" OBS_VALUE="-2.58498" BBK_DIFF_A="0.12083"/>
      <bbk:Obs TIME_PERIOD="2002-07-09" OBS_VALUE="-2.70581" BBK_DIFF_A="-0.1054"/>
      <bbk:Obs TIME_PERIOD="2002-07-08" OBS_VALUE="-2.60041" BBK_DIFF_A="-0.10727"/>
      <bbk:Obs TIME_PERIOD="2002-07-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-07-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-07-05" OBS_VALUE="-2.49314" BBK_DIFF_A="-0.0366"/>
      <bbk:Obs TIME_PERIOD="2002-07-04" OBS_VALUE="-2.45654" BBK_DIFF_A="0.03447"/>
      <bbk:Obs TIME_PERIOD="2002-07-03" OBS_VALUE="-2.49101" BBK_DIFF_A="0.00519"/>
      <bbk:Obs TIME_PERIOD="2002-07-02" OBS_VALUE="-2.4962" BBK_DIFF_A="-0.02312"/>
      <bbk:Obs TIME_PERIOD="2002-07-01" OBS_VALUE="-2.47308" BBK_DIFF_A="-0.09861"/>
      <bbk:Obs TIME_PERIOD="2002-06-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-06-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-06-28" OBS_VALUE="-2.37447" BBK_DIFF_A="-0.08425"/>
      <bbk:Obs TIME_PERIOD="2002-06-27" OBS_VALUE="-2.29022" BBK_DIFF_A="-0.08787"/>
      <bbk:Obs TIME_PERIOD="2002-06-26" OBS_VALUE="-2.20235" BBK_DIFF_A="0.2119"/>
      <bbk:Obs TIME_PERIOD="2002-06-25" OBS_VALUE="-2.41425" BBK_DIFF_A="-0.0559"/>
      <bbk:Obs TIME_PERIOD="2002-06-24" OBS_VALUE="-2.35835" BBK_DIFF_A="0.1319"/>
      <bbk:Obs TIME_PERIOD="2002-06-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-06-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-06-21" OBS_VALUE="-2.49025" BBK_DIFF_A="-0.04412"/>
      <bbk:Obs TIME_PERIOD="2002-06-20" OBS_VALUE="-2.44613" BBK_DIFF_A="0.03613"/>
      <bbk:Obs TIME_PERIOD="2002-06-19" OBS_VALUE="-2.48226" BBK_DIFF_A="0.0332"/>
      <bbk:Obs TIME_PERIOD="2002-06-18" OBS_VALUE="-2.51546" BBK_DIFF_A="0.12737"/>
      <bbk:Obs TIME_PERIOD="2002-06-17" OBS_VALUE="-2.64283" BBK_DIFF_A="-0.06018"/>
      <bbk:Obs TIME_PERIOD="2002-06-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-06-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-06-14" OBS_VALUE="-2.58265" BBK_DIFF_A="0.16712"/>
      <bbk:Obs TIME_PERIOD="2002-06-13" OBS_VALUE="-2.74977" BBK_DIFF_A="-0.01769"/>
      <bbk:Obs TIME_PERIOD="2002-06-12" OBS_VALUE="-2.73208" BBK_DIFF_A="0.05296"/>
      <bbk:Obs TIME_PERIOD="2002-06-11" OBS_VALUE="-2.78504" BBK_DIFF_A="0.02347"/>
      <bbk:Obs TIME_PERIOD="2002-06-10" OBS_VALUE="-2.80851" BBK_DIFF_A="-0.01272"/>
      <bbk:Obs TIME_PERIOD="2002-06-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-06-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-06-07" OBS_VALUE="-2.79579" BBK_DIFF_A="-0.01394"/>
      <bbk:Obs TIME_PERIOD="2002-06-06" OBS_VALUE="-2.78185" BBK_DIFF_A="-0.01367"/>
      <bbk:Obs TIME_PERIOD="2002-06-05" OBS_VALUE="-2.76818" BBK_DIFF_A="-0.04917"/>
      <bbk:Obs TIME_PERIOD="2002-06-04" OBS_VALUE="-2.71901" BBK_DIFF_A="0.0062"/>
      <bbk:Obs TIME_PERIOD="2002-06-03" OBS_VALUE="-2.72521" BBK_DIFF_A="-0.01944"/>
      <bbk:Obs TIME_PERIOD="2002-06-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-06-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-05-31" OBS_VALUE="-2.70577" BBK_DIFF_A="0.04185"/>
      <bbk:Obs TIME_PERIOD="2002-05-30" OBS_VALUE="-2.74762" BBK_DIFF_A="0.00577"/>
      <bbk:Obs TIME_PERIOD="2002-05-29" OBS_VALUE="-2.75339" BBK_DIFF_A="0.03603"/>
      <bbk:Obs TIME_PERIOD="2002-05-28" OBS_VALUE="-2.78942" BBK_DIFF_A="-0.0108"/>
      <bbk:Obs TIME_PERIOD="2002-05-27" OBS_VALUE="-2.77862" BBK_DIFF_A="-0.04759"/>
      <bbk:Obs TIME_PERIOD="2002-05-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-05-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-05-24" OBS_VALUE="-2.73103" BBK_DIFF_A="0.04227"/>
      <bbk:Obs TIME_PERIOD="2002-05-23" OBS_VALUE="-2.7733" BBK_DIFF_A="0.04205"/>
      <bbk:Obs TIME_PERIOD="2002-05-22" OBS_VALUE="-2.81535" BBK_DIFF_A="-0.14669"/>
      <bbk:Obs TIME_PERIOD="2002-05-21" OBS_VALUE="-2.66866" BBK_DIFF_A="0.15312"/>
      <bbk:Obs TIME_PERIOD="2002-05-20" OBS_VALUE="-2.82178" BBK_DIFF_A="-0.04956"/>
      <bbk:Obs TIME_PERIOD="2002-05-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-05-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-05-17" OBS_VALUE="-2.77222" BBK_DIFF_A="0.00197"/>
      <bbk:Obs TIME_PERIOD="2002-05-16" OBS_VALUE="-2.77419" BBK_DIFF_A="0.08851"/>
      <bbk:Obs TIME_PERIOD="2002-05-15" OBS_VALUE="-2.8627" BBK_DIFF_A="-0.03644"/>
      <bbk:Obs TIME_PERIOD="2002-05-14" OBS_VALUE="-2.82626" BBK_DIFF_A="-0.00668"/>
      <bbk:Obs TIME_PERIOD="2002-05-13" OBS_VALUE="-2.81958" BBK_DIFF_A="0.0592"/>
      <bbk:Obs TIME_PERIOD="2002-05-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-05-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-05-10" OBS_VALUE="-2.87878" BBK_DIFF_A="-0.03688"/>
      <bbk:Obs TIME_PERIOD="2002-05-09" OBS_VALUE="-2.8419" BBK_DIFF_A="0.12116"/>
      <bbk:Obs TIME_PERIOD="2002-05-08" OBS_VALUE="-2.96306" BBK_DIFF_A="0.00703"/>
      <bbk:Obs TIME_PERIOD="2002-05-07" OBS_VALUE="-2.97009" BBK_DIFF_A="-0.09809"/>
      <bbk:Obs TIME_PERIOD="2002-05-06" OBS_VALUE="-2.872" BBK_DIFF_A="0.0189"/>
      <bbk:Obs TIME_PERIOD="2002-05-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-05-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-05-03" OBS_VALUE="-2.8909" BBK_DIFF_A="-0.01707"/>
      <bbk:Obs TIME_PERIOD="2002-05-02" OBS_VALUE="-2.87383" BBK_DIFF_A="0.24242"/>
      <bbk:Obs TIME_PERIOD="2002-05-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-04-30" OBS_VALUE="-3.11625" BBK_DIFF_A="-0.35068"/>
      <bbk:Obs TIME_PERIOD="2002-04-29" OBS_VALUE="-2.76557" BBK_DIFF_A="0.19134"/>
      <bbk:Obs TIME_PERIOD="2002-04-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-04-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-04-26" OBS_VALUE="-2.95691" BBK_DIFF_A="-0.11277"/>
      <bbk:Obs TIME_PERIOD="2002-04-25" OBS_VALUE="-2.84414" BBK_DIFF_A="0.3389"/>
      <bbk:Obs TIME_PERIOD="2002-04-24" OBS_VALUE="-3.18304" BBK_DIFF_A="-0.0164"/>
      <bbk:Obs TIME_PERIOD="2002-04-23" OBS_VALUE="-3.16664" BBK_DIFF_A="-0.01028"/>
      <bbk:Obs TIME_PERIOD="2002-04-22" OBS_VALUE="-3.15636" BBK_DIFF_A="-0.00211"/>
      <bbk:Obs TIME_PERIOD="2002-04-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-04-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-04-19" OBS_VALUE="-3.15425" BBK_DIFF_A="0.00661"/>
      <bbk:Obs TIME_PERIOD="2002-04-18" OBS_VALUE="-3.16086" BBK_DIFF_A="-0.26886"/>
      <bbk:Obs TIME_PERIOD="2002-04-17" OBS_VALUE="-2.892" BBK_DIFF_A="0.12922"/>
      <bbk:Obs TIME_PERIOD="2002-04-16" OBS_VALUE="-3.02122" BBK_DIFF_A="-0.02944"/>
      <bbk:Obs TIME_PERIOD="2002-04-15" OBS_VALUE="-2.99178" BBK_DIFF_A="-0.09187"/>
      <bbk:Obs TIME_PERIOD="2002-04-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-04-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-04-12" OBS_VALUE="-2.89991" BBK_DIFF_A="0.1827"/>
      <bbk:Obs TIME_PERIOD="2002-04-11" OBS_VALUE="-3.08261" BBK_DIFF_A="-0.16014"/>
      <bbk:Obs TIME_PERIOD="2002-04-10" OBS_VALUE="-2.92247" BBK_DIFF_A="0.0739"/>
      <bbk:Obs TIME_PERIOD="2002-04-09" OBS_VALUE="-2.99637" BBK_DIFF_A="-0.0905"/>
      <bbk:Obs TIME_PERIOD="2002-04-08" OBS_VALUE="-2.90587" BBK_DIFF_A="-0.06379"/>
      <bbk:Obs TIME_PERIOD="2002-04-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-04-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-04-05" OBS_VALUE="-2.84208" BBK_DIFF_A="0.07399"/>
      <bbk:Obs TIME_PERIOD="2002-04-04" OBS_VALUE="-2.91607" BBK_DIFF_A="0.13558"/>
      <bbk:Obs TIME_PERIOD="2002-04-03" OBS_VALUE="-3.05165" BBK_DIFF_A="0.03357"/>
      <bbk:Obs TIME_PERIOD="2002-04-02" OBS_VALUE="-3.08522" BBK_DIFF_A="-0.12817"/>
      <bbk:Obs TIME_PERIOD="2002-04-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-03-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-03-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-03-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-03-28" OBS_VALUE="-2.95705" BBK_DIFF_A="-0.00711"/>
      <bbk:Obs TIME_PERIOD="2002-03-27" OBS_VALUE="-2.94994" BBK_DIFF_A="0.06713"/>
      <bbk:Obs TIME_PERIOD="2002-03-26" OBS_VALUE="-3.01707" BBK_DIFF_A="-0.01557"/>
      <bbk:Obs TIME_PERIOD="2002-03-25" OBS_VALUE="-3.0015" BBK_DIFF_A="0.01821"/>
      <bbk:Obs TIME_PERIOD="2002-03-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-03-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-03-22" OBS_VALUE="-3.01971" BBK_DIFF_A="-0.14502"/>
      <bbk:Obs TIME_PERIOD="2002-03-21" OBS_VALUE="-2.87469" BBK_DIFF_A="-0.24948"/>
      <bbk:Obs TIME_PERIOD="2002-03-20" OBS_VALUE="-2.62521" BBK_DIFF_A="0.14878"/>
      <bbk:Obs TIME_PERIOD="2002-03-19" OBS_VALUE="-2.77399" BBK_DIFF_A="0.17373"/>
      <bbk:Obs TIME_PERIOD="2002-03-18" OBS_VALUE="-2.94772" BBK_DIFF_A="-0.13433"/>
      <bbk:Obs TIME_PERIOD="2002-03-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-03-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-03-15" OBS_VALUE="-2.81339" BBK_DIFF_A="0.01196"/>
      <bbk:Obs TIME_PERIOD="2002-03-14" OBS_VALUE="-2.82535" BBK_DIFF_A="-0.01567"/>
      <bbk:Obs TIME_PERIOD="2002-03-13" OBS_VALUE="-2.80968" BBK_DIFF_A="0.04689"/>
      <bbk:Obs TIME_PERIOD="2002-03-12" OBS_VALUE="-2.85657" BBK_DIFF_A="-0.04895"/>
      <bbk:Obs TIME_PERIOD="2002-03-11" OBS_VALUE="-2.80762" BBK_DIFF_A="-0.05835"/>
      <bbk:Obs TIME_PERIOD="2002-03-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-03-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-03-08" OBS_VALUE="-2.74927" BBK_DIFF_A="0.03761"/>
      <bbk:Obs TIME_PERIOD="2002-03-07" OBS_VALUE="-2.78688" BBK_DIFF_A="-0.03282"/>
      <bbk:Obs TIME_PERIOD="2002-03-06" OBS_VALUE="-2.75406" BBK_DIFF_A="-0.08105"/>
      <bbk:Obs TIME_PERIOD="2002-03-05" OBS_VALUE="-2.67301" BBK_DIFF_A="-0.11031"/>
      <bbk:Obs TIME_PERIOD="2002-03-04" OBS_VALUE="-2.5627" BBK_DIFF_A="-0.0311"/>
      <bbk:Obs TIME_PERIOD="2002-03-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-03-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-03-01" OBS_VALUE="-2.5316" BBK_DIFF_A="0.04758"/>
      <bbk:Obs TIME_PERIOD="2002-02-28" OBS_VALUE="-2.57918" BBK_DIFF_A="0.07139"/>
      <bbk:Obs TIME_PERIOD="2002-02-27" OBS_VALUE="-2.65057" BBK_DIFF_A="0.21728"/>
      <bbk:Obs TIME_PERIOD="2002-02-26" OBS_VALUE="-2.86785" BBK_DIFF_A="-0.06951"/>
      <bbk:Obs TIME_PERIOD="2002-02-25" OBS_VALUE="-2.79834" BBK_DIFF_A="-0.13966"/>
      <bbk:Obs TIME_PERIOD="2002-02-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-02-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-02-22" OBS_VALUE="-2.65868" BBK_DIFF_A="0.15375"/>
      <bbk:Obs TIME_PERIOD="2002-02-21" OBS_VALUE="-2.81243" BBK_DIFF_A="0.08124"/>
      <bbk:Obs TIME_PERIOD="2002-02-20" OBS_VALUE="-2.89367" BBK_DIFF_A="-0.35355"/>
      <bbk:Obs TIME_PERIOD="2002-02-19" OBS_VALUE="-2.54012" BBK_DIFF_A="0.01608"/>
      <bbk:Obs TIME_PERIOD="2002-02-18" OBS_VALUE="-2.5562" BBK_DIFF_A="0.01835"/>
      <bbk:Obs TIME_PERIOD="2002-02-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-02-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-02-15" OBS_VALUE="-2.57455" BBK_DIFF_A="0.03157"/>
      <bbk:Obs TIME_PERIOD="2002-02-14" OBS_VALUE="-2.60612" BBK_DIFF_A="-0.03977"/>
      <bbk:Obs TIME_PERIOD="2002-02-13" OBS_VALUE="-2.56635" BBK_DIFF_A="-0.02018"/>
      <bbk:Obs TIME_PERIOD="2002-02-12" OBS_VALUE="-2.54617" BBK_DIFF_A="0.00735"/>
      <bbk:Obs TIME_PERIOD="2002-02-11" OBS_VALUE="-2.55352" BBK_DIFF_A="0.01548"/>
      <bbk:Obs TIME_PERIOD="2002-02-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-02-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-02-08" OBS_VALUE="-2.569" BBK_DIFF_A="-0.20637"/>
      <bbk:Obs TIME_PERIOD="2002-02-07" OBS_VALUE="-2.36263" BBK_DIFF_A="-0.09907"/>
      <bbk:Obs TIME_PERIOD="2002-02-06" OBS_VALUE="-2.26356" BBK_DIFF_A="0.05041"/>
      <bbk:Obs TIME_PERIOD="2002-02-05" OBS_VALUE="-2.31397" BBK_DIFF_A="-9.8E-4"/>
      <bbk:Obs TIME_PERIOD="2002-02-04" OBS_VALUE="-2.31299" BBK_DIFF_A="0.10966"/>
      <bbk:Obs TIME_PERIOD="2002-02-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-02-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-02-01" OBS_VALUE="-2.42265" BBK_DIFF_A="-0.03921"/>
      <bbk:Obs TIME_PERIOD="2002-01-31" OBS_VALUE="-2.38344" BBK_DIFF_A="-0.00824"/>
      <bbk:Obs TIME_PERIOD="2002-01-30" OBS_VALUE="-2.3752" BBK_DIFF_A="0.12847"/>
      <bbk:Obs TIME_PERIOD="2002-01-29" OBS_VALUE="-2.50367" BBK_DIFF_A="-0.16434"/>
      <bbk:Obs TIME_PERIOD="2002-01-28" OBS_VALUE="-2.33933" BBK_DIFF_A="-0.0516"/>
      <bbk:Obs TIME_PERIOD="2002-01-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-01-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-01-25" OBS_VALUE="-2.28773" BBK_DIFF_A="0.23302"/>
      <bbk:Obs TIME_PERIOD="2002-01-24" OBS_VALUE="-2.52075" BBK_DIFF_A="4.2E-4"/>
      <bbk:Obs TIME_PERIOD="2002-01-23" OBS_VALUE="-2.52117" BBK_DIFF_A="-0.13357"/>
      <bbk:Obs TIME_PERIOD="2002-01-22" OBS_VALUE="-2.3876" BBK_DIFF_A="0.17688"/>
      <bbk:Obs TIME_PERIOD="2002-01-21" OBS_VALUE="-2.56448" BBK_DIFF_A="0.07073"/>
      <bbk:Obs TIME_PERIOD="2002-01-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-01-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-01-18" OBS_VALUE="-2.63521" BBK_DIFF_A="-0.11486"/>
      <bbk:Obs TIME_PERIOD="2002-01-17" OBS_VALUE="-2.52035" BBK_DIFF_A="-0.10812"/>
      <bbk:Obs TIME_PERIOD="2002-01-16" OBS_VALUE="-2.41223" BBK_DIFF_A="-0.01778"/>
      <bbk:Obs TIME_PERIOD="2002-01-15" OBS_VALUE="-2.39445" BBK_DIFF_A="0.1375"/>
      <bbk:Obs TIME_PERIOD="2002-01-14" OBS_VALUE="-2.53195" BBK_DIFF_A="0.01902"/>
      <bbk:Obs TIME_PERIOD="2002-01-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-01-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-01-11" OBS_VALUE="-2.55097" BBK_DIFF_A="0.02616"/>
      <bbk:Obs TIME_PERIOD="2002-01-10" OBS_VALUE="-2.57713" BBK_DIFF_A="-0.02311"/>
      <bbk:Obs TIME_PERIOD="2002-01-09" OBS_VALUE="-2.55402" BBK_DIFF_A="-0.04977"/>
      <bbk:Obs TIME_PERIOD="2002-01-08" OBS_VALUE="-2.50425" BBK_DIFF_A="0.12074"/>
      <bbk:Obs TIME_PERIOD="2002-01-07" OBS_VALUE="-2.62499" BBK_DIFF_A="-0.01298"/>
      <bbk:Obs TIME_PERIOD="2002-01-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-01-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2002-01-04" OBS_VALUE="-2.61201" BBK_DIFF_A="0.08901"/>
      <bbk:Obs TIME_PERIOD="2002-01-03" OBS_VALUE="-2.70102" BBK_DIFF_A="-0.16192"/>
      <bbk:Obs TIME_PERIOD="2002-01-02" OBS_VALUE="-2.5391" BBK_DIFF_A="0.11366"/>
      <bbk:Obs TIME_PERIOD="2002-01-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-12-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-12-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-12-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-12-28" OBS_VALUE="-2.65276" BBK_DIFF_A="-0.32461"/>
      <bbk:Obs TIME_PERIOD="2001-12-27" OBS_VALUE="-2.32815" BBK_DIFF_A="0.09165"/>
      <bbk:Obs TIME_PERIOD="2001-12-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-12-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-12-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-12-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-12-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-12-21" OBS_VALUE="-2.4198" BBK_DIFF_A="0.08937"/>
      <bbk:Obs TIME_PERIOD="2001-12-20" OBS_VALUE="-2.50917" BBK_DIFF_A="-0.06534"/>
      <bbk:Obs TIME_PERIOD="2001-12-19" OBS_VALUE="-2.44383" BBK_DIFF_A="0.13249"/>
      <bbk:Obs TIME_PERIOD="2001-12-18" OBS_VALUE="-2.57632" BBK_DIFF_A="0.09318"/>
      <bbk:Obs TIME_PERIOD="2001-12-17" OBS_VALUE="-2.6695" BBK_DIFF_A="-0.22538"/>
      <bbk:Obs TIME_PERIOD="2001-12-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-12-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-12-14" OBS_VALUE="-2.44412" BBK_DIFF_A="-0.15707"/>
      <bbk:Obs TIME_PERIOD="2001-12-13" OBS_VALUE="-2.28705" BBK_DIFF_A="0.34028"/>
      <bbk:Obs TIME_PERIOD="2001-12-12" OBS_VALUE="-2.62733" BBK_DIFF_A="-0.34926"/>
      <bbk:Obs TIME_PERIOD="2001-12-11" OBS_VALUE="-2.27807" BBK_DIFF_A="0.07942"/>
      <bbk:Obs TIME_PERIOD="2001-12-10" OBS_VALUE="-2.35749" BBK_DIFF_A="0.17313"/>
      <bbk:Obs TIME_PERIOD="2001-12-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-12-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-12-07" OBS_VALUE="-2.53062" BBK_DIFF_A="-0.18319"/>
      <bbk:Obs TIME_PERIOD="2001-12-06" OBS_VALUE="-2.34743" BBK_DIFF_A="0.11035"/>
      <bbk:Obs TIME_PERIOD="2001-12-05" OBS_VALUE="-2.45778" BBK_DIFF_A="-0.13957"/>
      <bbk:Obs TIME_PERIOD="2001-12-04" OBS_VALUE="-2.31821" BBK_DIFF_A="-0.0134"/>
      <bbk:Obs TIME_PERIOD="2001-12-03" OBS_VALUE="-2.30481" BBK_DIFF_A="0.24071"/>
      <bbk:Obs TIME_PERIOD="2001-12-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-12-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-11-30" OBS_VALUE="-2.54552" BBK_DIFF_A="0.08407"/>
      <bbk:Obs TIME_PERIOD="2001-11-29" OBS_VALUE="-2.62959" BBK_DIFF_A="-0.09384"/>
      <bbk:Obs TIME_PERIOD="2001-11-28" OBS_VALUE="-2.53575" BBK_DIFF_A="-0.12008"/>
      <bbk:Obs TIME_PERIOD="2001-11-27" OBS_VALUE="-2.41567" BBK_DIFF_A="-0.07629"/>
      <bbk:Obs TIME_PERIOD="2001-11-26" OBS_VALUE="-2.33938" BBK_DIFF_A="0.0363"/>
      <bbk:Obs TIME_PERIOD="2001-11-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-11-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-11-23" OBS_VALUE="-2.37568" BBK_DIFF_A="0.1074"/>
      <bbk:Obs TIME_PERIOD="2001-11-22" OBS_VALUE="-2.48308" BBK_DIFF_A="-0.11074"/>
      <bbk:Obs TIME_PERIOD="2001-11-21" OBS_VALUE="-2.37234" BBK_DIFF_A="-0.06327"/>
      <bbk:Obs TIME_PERIOD="2001-11-20" OBS_VALUE="-2.30907" BBK_DIFF_A="0.11934"/>
      <bbk:Obs TIME_PERIOD="2001-11-19" OBS_VALUE="-2.42841" BBK_DIFF_A="-0.01875"/>
      <bbk:Obs TIME_PERIOD="2001-11-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-11-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-11-16" OBS_VALUE="-2.40966" BBK_DIFF_A="-0.08597"/>
      <bbk:Obs TIME_PERIOD="2001-11-15" OBS_VALUE="-2.32369" BBK_DIFF_A="-0.08199"/>
      <bbk:Obs TIME_PERIOD="2001-11-14" OBS_VALUE="-2.2417" BBK_DIFF_A="-0.08556"/>
      <bbk:Obs TIME_PERIOD="2001-11-13" OBS_VALUE="-2.15614" BBK_DIFF_A="-0.06689"/>
      <bbk:Obs TIME_PERIOD="2001-11-12" OBS_VALUE="-2.08925" BBK_DIFF_A="0.02576"/>
      <bbk:Obs TIME_PERIOD="2001-11-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-11-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-11-09" OBS_VALUE="-2.11501" BBK_DIFF_A="-0.03287"/>
      <bbk:Obs TIME_PERIOD="2001-11-08" OBS_VALUE="-2.08214" BBK_DIFF_A="-0.07686"/>
      <bbk:Obs TIME_PERIOD="2001-11-07" OBS_VALUE="-2.00528" BBK_DIFF_A="-0.00504"/>
      <bbk:Obs TIME_PERIOD="2001-11-06" OBS_VALUE="-2.00024" BBK_DIFF_A="-0.13062"/>
      <bbk:Obs TIME_PERIOD="2001-11-05" OBS_VALUE="-1.86962" BBK_DIFF_A="0.00716"/>
      <bbk:Obs TIME_PERIOD="2001-11-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-11-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-11-02" OBS_VALUE="-1.87678" BBK_DIFF_A="0.0346"/>
      <bbk:Obs TIME_PERIOD="2001-11-01" OBS_VALUE="-1.91138" BBK_DIFF_A="0.55977"/>
      <bbk:Obs TIME_PERIOD="2001-10-31" OBS_VALUE="-2.47115" BBK_DIFF_A="-0.07043"/>
      <bbk:Obs TIME_PERIOD="2001-10-30" OBS_VALUE="-2.40072" BBK_DIFF_A="0.06162"/>
      <bbk:Obs TIME_PERIOD="2001-10-29" OBS_VALUE="-2.46234" BBK_DIFF_A="-0.08804"/>
      <bbk:Obs TIME_PERIOD="2001-10-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-10-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-10-26" OBS_VALUE="-2.3743" BBK_DIFF_A="0.17408"/>
      <bbk:Obs TIME_PERIOD="2001-10-25" OBS_VALUE="-2.54838" BBK_DIFF_A="0.02771"/>
      <bbk:Obs TIME_PERIOD="2001-10-24" OBS_VALUE="-2.57609" BBK_DIFF_A="0.03998"/>
      <bbk:Obs TIME_PERIOD="2001-10-23" OBS_VALUE="-2.61607" BBK_DIFF_A="0.03425"/>
      <bbk:Obs TIME_PERIOD="2001-10-22" OBS_VALUE="-2.65032" BBK_DIFF_A="-0.05846"/>
      <bbk:Obs TIME_PERIOD="2001-10-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-10-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-10-19" OBS_VALUE="-2.59186" BBK_DIFF_A="0.0417"/>
      <bbk:Obs TIME_PERIOD="2001-10-18" OBS_VALUE="-2.63356" BBK_DIFF_A="0.05435"/>
      <bbk:Obs TIME_PERIOD="2001-10-17" OBS_VALUE="-2.68791" BBK_DIFF_A="-0.07875"/>
      <bbk:Obs TIME_PERIOD="2001-10-16" OBS_VALUE="-2.60916" BBK_DIFF_A="0.04597"/>
      <bbk:Obs TIME_PERIOD="2001-10-15" OBS_VALUE="-2.65513" BBK_DIFF_A="0.07571"/>
      <bbk:Obs TIME_PERIOD="2001-10-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-10-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-10-12" OBS_VALUE="-2.73084" BBK_DIFF_A="-0.03317"/>
      <bbk:Obs TIME_PERIOD="2001-10-11" OBS_VALUE="-2.69767" BBK_DIFF_A="0.06646"/>
      <bbk:Obs TIME_PERIOD="2001-10-10" OBS_VALUE="-2.76413" BBK_DIFF_A="0.13453"/>
      <bbk:Obs TIME_PERIOD="2001-10-09" OBS_VALUE="-2.89866" BBK_DIFF_A="-0.02897"/>
      <bbk:Obs TIME_PERIOD="2001-10-08" OBS_VALUE="-2.86969" BBK_DIFF_A="-0.07635"/>
      <bbk:Obs TIME_PERIOD="2001-10-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-10-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-10-05" OBS_VALUE="-2.79334" BBK_DIFF_A="0.07514"/>
      <bbk:Obs TIME_PERIOD="2001-10-04" OBS_VALUE="-2.86848" BBK_DIFF_A="-0.06356"/>
      <bbk:Obs TIME_PERIOD="2001-10-03" OBS_VALUE="-2.80492" BBK_DIFF_A="0.05133"/>
      <bbk:Obs TIME_PERIOD="2001-10-02" OBS_VALUE="-2.85625" BBK_DIFF_A="-0.03241"/>
      <bbk:Obs TIME_PERIOD="2001-10-01" OBS_VALUE="-2.82384" BBK_DIFF_A="0.02769"/>
      <bbk:Obs TIME_PERIOD="2001-09-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-09-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-09-28" OBS_VALUE="-2.85153" BBK_DIFF_A="0.3826"/>
      <bbk:Obs TIME_PERIOD="2001-09-27" OBS_VALUE="-3.23413" BBK_DIFF_A="-0.17812"/>
      <bbk:Obs TIME_PERIOD="2001-09-26" OBS_VALUE="-3.05601" BBK_DIFF_A="0.08288"/>
      <bbk:Obs TIME_PERIOD="2001-09-25" OBS_VALUE="-3.13889" BBK_DIFF_A="-0.023"/>
      <bbk:Obs TIME_PERIOD="2001-09-24" OBS_VALUE="-3.11589" BBK_DIFF_A="0.28049"/>
      <bbk:Obs TIME_PERIOD="2001-09-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-09-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-09-21" OBS_VALUE="-3.39638" BBK_DIFF_A="0.41912"/>
      <bbk:Obs TIME_PERIOD="2001-09-20" OBS_VALUE="-3.8155" BBK_DIFF_A="-0.8296"/>
      <bbk:Obs TIME_PERIOD="2001-09-19" OBS_VALUE="-2.9859" BBK_DIFF_A="0.20444"/>
      <bbk:Obs TIME_PERIOD="2001-09-18" OBS_VALUE="-3.19034" BBK_DIFF_A="-0.78201"/>
      <bbk:Obs TIME_PERIOD="2001-09-17" OBS_VALUE="-2.40833" BBK_DIFF_A="-0.12126"/>
      <bbk:Obs TIME_PERIOD="2001-09-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-09-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-09-14" OBS_VALUE="-2.28707" BBK_DIFF_A="-0.02189"/>
      <bbk:Obs TIME_PERIOD="2001-09-13" OBS_VALUE="-2.26518" BBK_DIFF_A="-0.20543"/>
      <bbk:Obs TIME_PERIOD="2001-09-12" OBS_VALUE="-2.05975" BBK_DIFF_A="0.06953"/>
      <bbk:Obs TIME_PERIOD="2001-09-11" OBS_VALUE="-2.12928" BBK_DIFF_A="-0.14352"/>
      <bbk:Obs TIME_PERIOD="2001-09-10" OBS_VALUE="-1.98576" BBK_DIFF_A="0.03093"/>
      <bbk:Obs TIME_PERIOD="2001-09-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-09-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-09-07" OBS_VALUE="-2.01669" BBK_DIFF_A="-0.09504"/>
      <bbk:Obs TIME_PERIOD="2001-09-06" OBS_VALUE="-1.92165" BBK_DIFF_A="-0.02475"/>
      <bbk:Obs TIME_PERIOD="2001-09-05" OBS_VALUE="-1.8969" BBK_DIFF_A="-0.03069"/>
      <bbk:Obs TIME_PERIOD="2001-09-04" OBS_VALUE="-1.86621" BBK_DIFF_A="0.15341"/>
      <bbk:Obs TIME_PERIOD="2001-09-03" OBS_VALUE="-2.01962" BBK_DIFF_A="-0.03366"/>
      <bbk:Obs TIME_PERIOD="2001-09-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-09-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-08-31" OBS_VALUE="-1.98596" BBK_DIFF_A="0.26372"/>
      <bbk:Obs TIME_PERIOD="2001-08-30" OBS_VALUE="-2.24968" BBK_DIFF_A="0.39627"/>
      <bbk:Obs TIME_PERIOD="2001-08-29" OBS_VALUE="-2.64595" BBK_DIFF_A="-0.11517"/>
      <bbk:Obs TIME_PERIOD="2001-08-28" OBS_VALUE="-2.53078" BBK_DIFF_A="0.05621"/>
      <bbk:Obs TIME_PERIOD="2001-08-27" OBS_VALUE="-2.58699" BBK_DIFF_A="0.0522"/>
      <bbk:Obs TIME_PERIOD="2001-08-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-08-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-08-24" OBS_VALUE="-2.63919" BBK_DIFF_A="-0.40077"/>
      <bbk:Obs TIME_PERIOD="2001-08-23" OBS_VALUE="-2.23842" BBK_DIFF_A="-0.32151"/>
      <bbk:Obs TIME_PERIOD="2001-08-22" OBS_VALUE="-1.91691" BBK_DIFF_A="0.37072"/>
      <bbk:Obs TIME_PERIOD="2001-08-21" OBS_VALUE="-2.28763" BBK_DIFF_A="-0.55559"/>
      <bbk:Obs TIME_PERIOD="2001-08-20" OBS_VALUE="-1.73204" BBK_DIFF_A="0.07209"/>
      <bbk:Obs TIME_PERIOD="2001-08-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-08-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-08-17" OBS_VALUE="-1.80413" BBK_DIFF_A="-0.02674"/>
      <bbk:Obs TIME_PERIOD="2001-08-16" OBS_VALUE="-1.77739" BBK_DIFF_A="-0.1206"/>
      <bbk:Obs TIME_PERIOD="2001-08-15" OBS_VALUE="-1.65679" BBK_DIFF_A="0.09617"/>
      <bbk:Obs TIME_PERIOD="2001-08-14" OBS_VALUE="-1.75296" BBK_DIFF_A="-0.0923"/>
      <bbk:Obs TIME_PERIOD="2001-08-13" OBS_VALUE="-1.66066" BBK_DIFF_A="-0.01486"/>
      <bbk:Obs TIME_PERIOD="2001-08-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-08-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-08-10" OBS_VALUE="-1.6458" BBK_DIFF_A="0.53717"/>
      <bbk:Obs TIME_PERIOD="2001-08-09" OBS_VALUE="-2.18297" BBK_DIFF_A="-0.08374"/>
      <bbk:Obs TIME_PERIOD="2001-08-08" OBS_VALUE="-2.09923" BBK_DIFF_A="-0.01281"/>
      <bbk:Obs TIME_PERIOD="2001-08-07" OBS_VALUE="-2.08642" BBK_DIFF_A="0.73141"/>
      <bbk:Obs TIME_PERIOD="2001-08-06" OBS_VALUE="-2.81783" BBK_DIFF_A="-1.05673"/>
      <bbk:Obs TIME_PERIOD="2001-08-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-08-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-08-03" OBS_VALUE="-1.7611" BBK_DIFF_A="-0.06467"/>
      <bbk:Obs TIME_PERIOD="2001-08-02" OBS_VALUE="-1.69643" BBK_DIFF_A="0.00128"/>
      <bbk:Obs TIME_PERIOD="2001-08-01" OBS_VALUE="-1.69771" BBK_DIFF_A="0.19226"/>
      <bbk:Obs TIME_PERIOD="2001-07-31" OBS_VALUE="-1.88997" BBK_DIFF_A="-0.18048"/>
      <bbk:Obs TIME_PERIOD="2001-07-30" OBS_VALUE="-1.70949" BBK_DIFF_A="0.01153"/>
      <bbk:Obs TIME_PERIOD="2001-07-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-07-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-07-27" OBS_VALUE="-1.72102" BBK_DIFF_A="0.52047"/>
      <bbk:Obs TIME_PERIOD="2001-07-26" OBS_VALUE="-2.24149" BBK_DIFF_A="-0.47359"/>
      <bbk:Obs TIME_PERIOD="2001-07-25" OBS_VALUE="-1.7679" BBK_DIFF_A="-0.03227"/>
      <bbk:Obs TIME_PERIOD="2001-07-24" OBS_VALUE="-1.73563" BBK_DIFF_A="-0.01684"/>
      <bbk:Obs TIME_PERIOD="2001-07-23" OBS_VALUE="-1.71879" BBK_DIFF_A="0.15555"/>
      <bbk:Obs TIME_PERIOD="2001-07-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-07-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-07-20" OBS_VALUE="-1.87434" BBK_DIFF_A="-0.11639"/>
      <bbk:Obs TIME_PERIOD="2001-07-19" OBS_VALUE="-1.75795" BBK_DIFF_A="0.59506"/>
      <bbk:Obs TIME_PERIOD="2001-07-18" OBS_VALUE="-2.35301" BBK_DIFF_A="-0.49517"/>
      <bbk:Obs TIME_PERIOD="2001-07-17" OBS_VALUE="-1.85784" BBK_DIFF_A="0.06495"/>
      <bbk:Obs TIME_PERIOD="2001-07-16" OBS_VALUE="-1.92279" BBK_DIFF_A="-0.08455"/>
      <bbk:Obs TIME_PERIOD="2001-07-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-07-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-07-13" OBS_VALUE="-1.83824" BBK_DIFF_A="0.00647"/>
      <bbk:Obs TIME_PERIOD="2001-07-12" OBS_VALUE="-1.84471" BBK_DIFF_A="0.27689"/>
      <bbk:Obs TIME_PERIOD="2001-07-11" OBS_VALUE="-2.1216" BBK_DIFF_A="-0.20889"/>
      <bbk:Obs TIME_PERIOD="2001-07-10" OBS_VALUE="-1.91271" BBK_DIFF_A="0.02415"/>
      <bbk:Obs TIME_PERIOD="2001-07-09" OBS_VALUE="-1.93686" BBK_DIFF_A="0.11633"/>
      <bbk:Obs TIME_PERIOD="2001-07-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-07-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-07-06" OBS_VALUE="-2.05319" BBK_DIFF_A="0.02371"/>
      <bbk:Obs TIME_PERIOD="2001-07-05" OBS_VALUE="-2.0769" BBK_DIFF_A="-0.07586"/>
      <bbk:Obs TIME_PERIOD="2001-07-04" OBS_VALUE="-2.00104" BBK_DIFF_A="0.19725"/>
      <bbk:Obs TIME_PERIOD="2001-07-03" OBS_VALUE="-2.19829" BBK_DIFF_A="-0.02135"/>
      <bbk:Obs TIME_PERIOD="2001-07-02" OBS_VALUE="-2.17694" BBK_DIFF_A="-0.1748"/>
      <bbk:Obs TIME_PERIOD="2001-07-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-06-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-06-29" OBS_VALUE="-2.00214" BBK_DIFF_A="-0.07623"/>
      <bbk:Obs TIME_PERIOD="2001-06-28" OBS_VALUE="-1.92591" BBK_DIFF_A="0.00793"/>
      <bbk:Obs TIME_PERIOD="2001-06-27" OBS_VALUE="-1.93384" BBK_DIFF_A="0.13777"/>
      <bbk:Obs TIME_PERIOD="2001-06-26" OBS_VALUE="-2.07161" BBK_DIFF_A="0.16548"/>
      <bbk:Obs TIME_PERIOD="2001-06-25" OBS_VALUE="-2.23709" BBK_DIFF_A="0.09821"/>
      <bbk:Obs TIME_PERIOD="2001-06-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-06-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-06-22" OBS_VALUE="-2.3353" BBK_DIFF_A="0.00302"/>
      <bbk:Obs TIME_PERIOD="2001-06-21" OBS_VALUE="-2.33832" BBK_DIFF_A="0.00887"/>
      <bbk:Obs TIME_PERIOD="2001-06-20" OBS_VALUE="-2.34719" BBK_DIFF_A="-0.03"/>
      <bbk:Obs TIME_PERIOD="2001-06-19" OBS_VALUE="-2.31719" BBK_DIFF_A="-0.18895"/>
      <bbk:Obs TIME_PERIOD="2001-06-18" OBS_VALUE="-2.12824" BBK_DIFF_A="-0.10467"/>
      <bbk:Obs TIME_PERIOD="2001-06-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-06-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-06-15" OBS_VALUE="-2.02357" BBK_DIFF_A="-0.15821"/>
      <bbk:Obs TIME_PERIOD="2001-06-14" OBS_VALUE="-1.86536" BBK_DIFF_A="-0.30782"/>
      <bbk:Obs TIME_PERIOD="2001-06-13" OBS_VALUE="-1.55754" BBK_DIFF_A="0.56914"/>
      <bbk:Obs TIME_PERIOD="2001-06-12" OBS_VALUE="-2.12668" BBK_DIFF_A="-0.07285"/>
      <bbk:Obs TIME_PERIOD="2001-06-11" OBS_VALUE="-2.05383" BBK_DIFF_A="-0.18924"/>
      <bbk:Obs TIME_PERIOD="2001-06-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-06-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-06-08" OBS_VALUE="-1.86459" BBK_DIFF_A="0.24988"/>
      <bbk:Obs TIME_PERIOD="2001-06-07" OBS_VALUE="-2.11447" BBK_DIFF_A="-0.07391"/>
      <bbk:Obs TIME_PERIOD="2001-06-06" OBS_VALUE="-2.04056" BBK_DIFF_A="0.09359"/>
      <bbk:Obs TIME_PERIOD="2001-06-05" OBS_VALUE="-2.13415" BBK_DIFF_A="0.12471"/>
      <bbk:Obs TIME_PERIOD="2001-06-04" OBS_VALUE="-2.25886" BBK_DIFF_A="-0.17539"/>
      <bbk:Obs TIME_PERIOD="2001-06-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-06-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-06-01" OBS_VALUE="-2.08347" BBK_DIFF_A="-0.1247"/>
      <bbk:Obs TIME_PERIOD="2001-05-31" OBS_VALUE="-1.95877" BBK_DIFF_A="-0.02884"/>
      <bbk:Obs TIME_PERIOD="2001-05-30" OBS_VALUE="-1.92993" BBK_DIFF_A="-0.0165"/>
      <bbk:Obs TIME_PERIOD="2001-05-29" OBS_VALUE="-1.91343" BBK_DIFF_A="0.17086"/>
      <bbk:Obs TIME_PERIOD="2001-05-28" OBS_VALUE="-2.08429" BBK_DIFF_A="-0.05397"/>
      <bbk:Obs TIME_PERIOD="2001-05-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-05-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-05-25" OBS_VALUE="-2.03032" BBK_DIFF_A="0.25584"/>
      <bbk:Obs TIME_PERIOD="2001-05-24" OBS_VALUE="-2.28616" BBK_DIFF_A="-0.24476"/>
      <bbk:Obs TIME_PERIOD="2001-05-23" OBS_VALUE="-2.0414" BBK_DIFF_A="-0.06433"/>
      <bbk:Obs TIME_PERIOD="2001-05-22" OBS_VALUE="-1.97707" BBK_DIFF_A="0.00211"/>
      <bbk:Obs TIME_PERIOD="2001-05-21" OBS_VALUE="-1.97918" BBK_DIFF_A="-0.07365"/>
      <bbk:Obs TIME_PERIOD="2001-05-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-05-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-05-18" OBS_VALUE="-1.90553" BBK_DIFF_A="0.552"/>
      <bbk:Obs TIME_PERIOD="2001-05-17" OBS_VALUE="-2.45753" BBK_DIFF_A="-0.5437"/>
      <bbk:Obs TIME_PERIOD="2001-05-16" OBS_VALUE="-1.91383" BBK_DIFF_A="0.58259"/>
      <bbk:Obs TIME_PERIOD="2001-05-15" OBS_VALUE="-2.49642" BBK_DIFF_A="-0.07458"/>
      <bbk:Obs TIME_PERIOD="2001-05-14" OBS_VALUE="-2.42184" BBK_DIFF_A="-0.37254"/>
      <bbk:Obs TIME_PERIOD="2001-05-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-05-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-05-11" OBS_VALUE="-2.0493" BBK_DIFF_A="-0.5607"/>
      <bbk:Obs TIME_PERIOD="2001-05-10" OBS_VALUE="-1.4886" BBK_DIFF_A="0.49636"/>
      <bbk:Obs TIME_PERIOD="2001-05-09" OBS_VALUE="-1.98496" BBK_DIFF_A="0.01006"/>
      <bbk:Obs TIME_PERIOD="2001-05-08" OBS_VALUE="-1.99502" BBK_DIFF_A="-0.5336"/>
      <bbk:Obs TIME_PERIOD="2001-05-07" OBS_VALUE="-1.46142" BBK_DIFF_A="0.05356"/>
      <bbk:Obs TIME_PERIOD="2001-05-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-05-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-05-04" OBS_VALUE="-1.51498" BBK_DIFF_A="0.21807"/>
      <bbk:Obs TIME_PERIOD="2001-05-03" OBS_VALUE="-1.73305" BBK_DIFF_A="-0.10812"/>
      <bbk:Obs TIME_PERIOD="2001-05-02" OBS_VALUE="-1.62493" BBK_DIFF_A="0.03809"/>
      <bbk:Obs TIME_PERIOD="2001-05-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-04-30" OBS_VALUE="-1.66302" BBK_DIFF_A="-0.116"/>
      <bbk:Obs TIME_PERIOD="2001-04-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-04-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-04-27" OBS_VALUE="-1.54702" BBK_DIFF_A="1.40448"/>
      <bbk:Obs TIME_PERIOD="2001-04-26" OBS_VALUE="-2.9515" BBK_DIFF_A="-1.41233"/>
      <bbk:Obs TIME_PERIOD="2001-04-25" OBS_VALUE="-1.53917" BBK_DIFF_A="0.04616"/>
      <bbk:Obs TIME_PERIOD="2001-04-24" OBS_VALUE="-1.58533" BBK_DIFF_A="0.59671"/>
      <bbk:Obs TIME_PERIOD="2001-04-23" OBS_VALUE="-2.18204" BBK_DIFF_A="-0.24453"/>
      <bbk:Obs TIME_PERIOD="2001-04-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-04-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-04-20" OBS_VALUE="-1.93751" BBK_DIFF_A="-0.17724"/>
      <bbk:Obs TIME_PERIOD="2001-04-19" OBS_VALUE="-1.76027" BBK_DIFF_A="-0.20117"/>
      <bbk:Obs TIME_PERIOD="2001-04-18" OBS_VALUE="-1.5591" BBK_DIFF_A="0.05477"/>
      <bbk:Obs TIME_PERIOD="2001-04-17" OBS_VALUE="-1.61387" BBK_DIFF_A="0.01811"/>
      <bbk:Obs TIME_PERIOD="2001-04-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-04-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-04-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-04-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-04-12" OBS_VALUE="-1.63198" BBK_DIFF_A="0.12163"/>
      <bbk:Obs TIME_PERIOD="2001-04-11" OBS_VALUE="-1.75361" BBK_DIFF_A="-0.03056"/>
      <bbk:Obs TIME_PERIOD="2001-04-10" OBS_VALUE="-1.72305" BBK_DIFF_A="-0.03145"/>
      <bbk:Obs TIME_PERIOD="2001-04-09" OBS_VALUE="-1.6916" BBK_DIFF_A="0.00443"/>
      <bbk:Obs TIME_PERIOD="2001-04-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-04-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-04-06" OBS_VALUE="-1.69603" BBK_DIFF_A="0.05527"/>
      <bbk:Obs TIME_PERIOD="2001-04-05" OBS_VALUE="-1.7513" BBK_DIFF_A="-0.15154"/>
      <bbk:Obs TIME_PERIOD="2001-04-04" OBS_VALUE="-1.59976" BBK_DIFF_A="0.14873"/>
      <bbk:Obs TIME_PERIOD="2001-04-03" OBS_VALUE="-1.74849" BBK_DIFF_A="0.00206"/>
      <bbk:Obs TIME_PERIOD="2001-04-02" OBS_VALUE="-1.75055" BBK_DIFF_A="0.0039"/>
      <bbk:Obs TIME_PERIOD="2001-04-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-03-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-03-30" OBS_VALUE="-1.75445" BBK_DIFF_A="-0.02216"/>
      <bbk:Obs TIME_PERIOD="2001-03-29" OBS_VALUE="-1.73229" BBK_DIFF_A="-0.07853"/>
      <bbk:Obs TIME_PERIOD="2001-03-28" OBS_VALUE="-1.65376" BBK_DIFF_A="-0.13838"/>
      <bbk:Obs TIME_PERIOD="2001-03-27" OBS_VALUE="-1.51538" BBK_DIFF_A="0.01764"/>
      <bbk:Obs TIME_PERIOD="2001-03-26" OBS_VALUE="-1.53302" BBK_DIFF_A="-0.09619"/>
      <bbk:Obs TIME_PERIOD="2001-03-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-03-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-03-23" OBS_VALUE="-1.43683" BBK_DIFF_A="0.05633"/>
      <bbk:Obs TIME_PERIOD="2001-03-22" OBS_VALUE="-1.49316" BBK_DIFF_A="-0.11626"/>
      <bbk:Obs TIME_PERIOD="2001-03-21" OBS_VALUE="-1.3769" BBK_DIFF_A="0.19077"/>
      <bbk:Obs TIME_PERIOD="2001-03-20" OBS_VALUE="-1.56767" BBK_DIFF_A="-0.01852"/>
      <bbk:Obs TIME_PERIOD="2001-03-19" OBS_VALUE="-1.54915" BBK_DIFF_A="0.11085"/>
      <bbk:Obs TIME_PERIOD="2001-03-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-03-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-03-16" OBS_VALUE="-1.66" BBK_DIFF_A="0.03755"/>
      <bbk:Obs TIME_PERIOD="2001-03-15" OBS_VALUE="-1.69755" BBK_DIFF_A="-0.17595"/>
      <bbk:Obs TIME_PERIOD="2001-03-14" OBS_VALUE="-1.5216" BBK_DIFF_A="0.13142"/>
      <bbk:Obs TIME_PERIOD="2001-03-13" OBS_VALUE="-1.65302" BBK_DIFF_A="-0.15919"/>
      <bbk:Obs TIME_PERIOD="2001-03-12" OBS_VALUE="-1.49383" BBK_DIFF_A="0.18648"/>
      <bbk:Obs TIME_PERIOD="2001-03-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-03-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-03-09" OBS_VALUE="-1.68031" BBK_DIFF_A="0.02327"/>
      <bbk:Obs TIME_PERIOD="2001-03-08" OBS_VALUE="-1.70358" BBK_DIFF_A="0.1711"/>
      <bbk:Obs TIME_PERIOD="2001-03-07" OBS_VALUE="-1.87468" BBK_DIFF_A="-0.08218"/>
      <bbk:Obs TIME_PERIOD="2001-03-06" OBS_VALUE="-1.7925" BBK_DIFF_A="-0.19221"/>
      <bbk:Obs TIME_PERIOD="2001-03-05" OBS_VALUE="-1.60029" BBK_DIFF_A="0.15954"/>
      <bbk:Obs TIME_PERIOD="2001-03-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-03-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-03-02" OBS_VALUE="-1.75983" BBK_DIFF_A="-0.00151"/>
      <bbk:Obs TIME_PERIOD="2001-03-01" OBS_VALUE="-1.75832" BBK_DIFF_A="0.08175"/>
      <bbk:Obs TIME_PERIOD="2001-02-28" OBS_VALUE="-1.84007" BBK_DIFF_A="-0.11959"/>
      <bbk:Obs TIME_PERIOD="2001-02-27" OBS_VALUE="-1.72048" BBK_DIFF_A="-0.18818"/>
      <bbk:Obs TIME_PERIOD="2001-02-26" OBS_VALUE="-1.5323" BBK_DIFF_A="0.62993"/>
      <bbk:Obs TIME_PERIOD="2001-02-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-02-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-02-23" OBS_VALUE="-2.16223" BBK_DIFF_A="-0.58925"/>
      <bbk:Obs TIME_PERIOD="2001-02-22" OBS_VALUE="-1.57298" BBK_DIFF_A="-0.1623"/>
      <bbk:Obs TIME_PERIOD="2001-02-21" OBS_VALUE="-1.41068" BBK_DIFF_A="0.09169"/>
      <bbk:Obs TIME_PERIOD="2001-02-20" OBS_VALUE="-1.50237" BBK_DIFF_A="0.08096"/>
      <bbk:Obs TIME_PERIOD="2001-02-19" OBS_VALUE="-1.58333" BBK_DIFF_A="-0.24432"/>
      <bbk:Obs TIME_PERIOD="2001-02-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-02-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-02-16" OBS_VALUE="-1.33901" BBK_DIFF_A="0.07171"/>
      <bbk:Obs TIME_PERIOD="2001-02-15" OBS_VALUE="-1.41072" BBK_DIFF_A="0.27554"/>
      <bbk:Obs TIME_PERIOD="2001-02-14" OBS_VALUE="-1.68626" BBK_DIFF_A="-0.11197"/>
      <bbk:Obs TIME_PERIOD="2001-02-13" OBS_VALUE="-1.57429" BBK_DIFF_A="-0.19552"/>
      <bbk:Obs TIME_PERIOD="2001-02-12" OBS_VALUE="-1.37877" BBK_DIFF_A="-0.08675"/>
      <bbk:Obs TIME_PERIOD="2001-02-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-02-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-02-09" OBS_VALUE="-1.29202" BBK_DIFF_A="0.02491"/>
      <bbk:Obs TIME_PERIOD="2001-02-08" OBS_VALUE="-1.31693" BBK_DIFF_A="-0.04187"/>
      <bbk:Obs TIME_PERIOD="2001-02-07" OBS_VALUE="-1.27506" BBK_DIFF_A="0.24382"/>
      <bbk:Obs TIME_PERIOD="2001-02-06" OBS_VALUE="-1.51888" BBK_DIFF_A="-0.09214"/>
      <bbk:Obs TIME_PERIOD="2001-02-05" OBS_VALUE="-1.42674" BBK_DIFF_A="0.0044"/>
      <bbk:Obs TIME_PERIOD="2001-02-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-02-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-02-02" OBS_VALUE="-1.43114" BBK_DIFF_A="0.10501"/>
      <bbk:Obs TIME_PERIOD="2001-02-01" OBS_VALUE="-1.53615" BBK_DIFF_A="-0.00768"/>
      <bbk:Obs TIME_PERIOD="2001-01-31" OBS_VALUE="-1.52847" BBK_DIFF_A="-0.05225"/>
      <bbk:Obs TIME_PERIOD="2001-01-30" OBS_VALUE="-1.47622" BBK_DIFF_A="-0.13438"/>
      <bbk:Obs TIME_PERIOD="2001-01-29" OBS_VALUE="-1.34184" BBK_DIFF_A="0.02245"/>
      <bbk:Obs TIME_PERIOD="2001-01-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-01-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-01-26" OBS_VALUE="-1.36429" BBK_DIFF_A="0.17589"/>
      <bbk:Obs TIME_PERIOD="2001-01-25" OBS_VALUE="-1.54018" BBK_DIFF_A="-0.02625"/>
      <bbk:Obs TIME_PERIOD="2001-01-24" OBS_VALUE="-1.51393" BBK_DIFF_A="0.00842"/>
      <bbk:Obs TIME_PERIOD="2001-01-23" OBS_VALUE="-1.52235" BBK_DIFF_A="0.12182"/>
      <bbk:Obs TIME_PERIOD="2001-01-22" OBS_VALUE="-1.64417" BBK_DIFF_A="0.08694"/>
      <bbk:Obs TIME_PERIOD="2001-01-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-01-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-01-19" OBS_VALUE="-1.73111" BBK_DIFF_A="-0.2647"/>
      <bbk:Obs TIME_PERIOD="2001-01-18" OBS_VALUE="-1.46641" BBK_DIFF_A="0.29494"/>
      <bbk:Obs TIME_PERIOD="2001-01-17" OBS_VALUE="-1.76135" BBK_DIFF_A="-0.11441"/>
      <bbk:Obs TIME_PERIOD="2001-01-16" OBS_VALUE="-1.64694" BBK_DIFF_A="-0.06721"/>
      <bbk:Obs TIME_PERIOD="2001-01-15" OBS_VALUE="-1.57973" BBK_DIFF_A="0.29779"/>
      <bbk:Obs TIME_PERIOD="2001-01-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-01-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-01-12" OBS_VALUE="-1.87752" BBK_DIFF_A="-0.51096"/>
      <bbk:Obs TIME_PERIOD="2001-01-11" OBS_VALUE="-1.36656" BBK_DIFF_A="0.10273"/>
      <bbk:Obs TIME_PERIOD="2001-01-10" OBS_VALUE="-1.46929" BBK_DIFF_A="0.02528"/>
      <bbk:Obs TIME_PERIOD="2001-01-09" OBS_VALUE="-1.49457" BBK_DIFF_A="-0.09453"/>
      <bbk:Obs TIME_PERIOD="2001-01-08" OBS_VALUE="-1.40004" BBK_DIFF_A="0.07032"/>
      <bbk:Obs TIME_PERIOD="2001-01-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-01-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2001-01-05" OBS_VALUE="-1.47036" BBK_DIFF_A="0.02326"/>
      <bbk:Obs TIME_PERIOD="2001-01-04" OBS_VALUE="-1.49362" BBK_DIFF_A="-0.06352"/>
      <bbk:Obs TIME_PERIOD="2001-01-03" OBS_VALUE="-1.4301" BBK_DIFF_A="0.03027"/>
      <bbk:Obs TIME_PERIOD="2001-01-02" OBS_VALUE="-1.46037" BBK_DIFF_A="0.26356"/>
      <bbk:Obs TIME_PERIOD="2001-01-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-12-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-12-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-12-29" OBS_VALUE="-1.72393" BBK_DIFF_A="0.52763"/>
      <bbk:Obs TIME_PERIOD="2000-12-28" OBS_VALUE="-2.25156" BBK_DIFF_A="-0.47106"/>
      <bbk:Obs TIME_PERIOD="2000-12-27" OBS_VALUE="-1.7805" BBK_DIFF_A="0.02938"/>
      <bbk:Obs TIME_PERIOD="2000-12-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-12-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-12-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-12-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-12-22" OBS_VALUE="-1.80988" BBK_DIFF_A="-0.00304"/>
      <bbk:Obs TIME_PERIOD="2000-12-21" OBS_VALUE="-1.80684" BBK_DIFF_A="0.33131"/>
      <bbk:Obs TIME_PERIOD="2000-12-20" OBS_VALUE="-2.13815" BBK_DIFF_A="-0.5908"/>
      <bbk:Obs TIME_PERIOD="2000-12-19" OBS_VALUE="-1.54735" BBK_DIFF_A="0.6139"/>
      <bbk:Obs TIME_PERIOD="2000-12-18" OBS_VALUE="-2.16125" BBK_DIFF_A="-1.08348"/>
      <bbk:Obs TIME_PERIOD="2000-12-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-12-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-12-15" OBS_VALUE="-1.07777" BBK_DIFF_A="0.38541"/>
      <bbk:Obs TIME_PERIOD="2000-12-14" OBS_VALUE="-1.46318" BBK_DIFF_A="0.51967"/>
      <bbk:Obs TIME_PERIOD="2000-12-13" OBS_VALUE="-1.98285" BBK_DIFF_A="0.41745"/>
      <bbk:Obs TIME_PERIOD="2000-12-12" OBS_VALUE="-2.4003" BBK_DIFF_A="-0.5356"/>
      <bbk:Obs TIME_PERIOD="2000-12-11" OBS_VALUE="-1.8647" BBK_DIFF_A="0.20384"/>
      <bbk:Obs TIME_PERIOD="2000-12-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-12-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-12-08" OBS_VALUE="-2.06854" BBK_DIFF_A="0.36771"/>
      <bbk:Obs TIME_PERIOD="2000-12-07" OBS_VALUE="-2.43625" BBK_DIFF_A="-0.48073"/>
      <bbk:Obs TIME_PERIOD="2000-12-06" OBS_VALUE="-1.95552" BBK_DIFF_A="-0.04601"/>
      <bbk:Obs TIME_PERIOD="2000-12-05" OBS_VALUE="-1.90951" BBK_DIFF_A="0.12098"/>
      <bbk:Obs TIME_PERIOD="2000-12-04" OBS_VALUE="-2.03049" BBK_DIFF_A="-0.68611"/>
      <bbk:Obs TIME_PERIOD="2000-12-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-12-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-12-01" OBS_VALUE="-1.34438" BBK_DIFF_A="-0.07794"/>
      <bbk:Obs TIME_PERIOD="2000-11-30" OBS_VALUE="-1.26644" BBK_DIFF_A="-0.15666"/>
      <bbk:Obs TIME_PERIOD="2000-11-29" OBS_VALUE="-1.10978" BBK_DIFF_A="-0.07659"/>
      <bbk:Obs TIME_PERIOD="2000-11-28" OBS_VALUE="-1.03319" BBK_DIFF_A="-0.01587"/>
      <bbk:Obs TIME_PERIOD="2000-11-27" OBS_VALUE="-1.01732" BBK_DIFF_A="0.77234"/>
      <bbk:Obs TIME_PERIOD="2000-11-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-11-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-11-24" OBS_VALUE="-1.78966" BBK_DIFF_A="-0.30194"/>
      <bbk:Obs TIME_PERIOD="2000-11-23" OBS_VALUE="-1.48772" BBK_DIFF_A="-0.0545"/>
      <bbk:Obs TIME_PERIOD="2000-11-22" OBS_VALUE="-1.43322" BBK_DIFF_A="1.05549"/>
      <bbk:Obs TIME_PERIOD="2000-11-21" OBS_VALUE="-2.48871" BBK_DIFF_A="-0.80403"/>
      <bbk:Obs TIME_PERIOD="2000-11-20" OBS_VALUE="-1.68468" BBK_DIFF_A="1.81826"/>
      <bbk:Obs TIME_PERIOD="2000-11-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-11-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-11-17" OBS_VALUE="-3.50294" BBK_DIFF_A="-2.1235"/>
      <bbk:Obs TIME_PERIOD="2000-11-16" OBS_VALUE="-1.37944" BBK_DIFF_A="2.08594"/>
      <bbk:Obs TIME_PERIOD="2000-11-15" OBS_VALUE="-3.46538" BBK_DIFF_A="-0.14791"/>
      <bbk:Obs TIME_PERIOD="2000-11-14" OBS_VALUE="-3.31747" BBK_DIFF_A="-1.58992"/>
      <bbk:Obs TIME_PERIOD="2000-11-13" OBS_VALUE="-1.72755" BBK_DIFF_A="-0.33601"/>
      <bbk:Obs TIME_PERIOD="2000-11-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-11-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-11-10" OBS_VALUE="-1.39154" BBK_DIFF_A="1.27764"/>
      <bbk:Obs TIME_PERIOD="2000-11-09" OBS_VALUE="-2.66918" BBK_DIFF_A="-0.92563"/>
      <bbk:Obs TIME_PERIOD="2000-11-08" OBS_VALUE="-1.74355" BBK_DIFF_A="-0.35551"/>
      <bbk:Obs TIME_PERIOD="2000-11-07" OBS_VALUE="-1.38804" BBK_DIFF_A="-0.18127"/>
      <bbk:Obs TIME_PERIOD="2000-11-06" OBS_VALUE="-1.20677" BBK_DIFF_A="0.20084"/>
      <bbk:Obs TIME_PERIOD="2000-11-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-11-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-11-03" OBS_VALUE="-1.40761" BBK_DIFF_A="0.75252"/>
      <bbk:Obs TIME_PERIOD="2000-11-02" OBS_VALUE="-2.16013" BBK_DIFF_A="-0.40557"/>
      <bbk:Obs TIME_PERIOD="2000-11-01" OBS_VALUE="-1.75456" BBK_DIFF_A="1.86375"/>
      <bbk:Obs TIME_PERIOD="2000-10-31" OBS_VALUE="-3.61831" BBK_DIFF_A="-1.7322"/>
      <bbk:Obs TIME_PERIOD="2000-10-30" OBS_VALUE="-1.88611" BBK_DIFF_A="-0.60542"/>
      <bbk:Obs TIME_PERIOD="2000-10-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-10-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-10-27" OBS_VALUE="-1.28069" BBK_DIFF_A="1.07264"/>
      <bbk:Obs TIME_PERIOD="2000-10-26" OBS_VALUE="-2.35333" BBK_DIFF_A="-0.81225"/>
      <bbk:Obs TIME_PERIOD="2000-10-25" OBS_VALUE="-1.54108" BBK_DIFF_A="1.80827"/>
      <bbk:Obs TIME_PERIOD="2000-10-24" OBS_VALUE="-3.34935" BBK_DIFF_A="-0.67992"/>
      <bbk:Obs TIME_PERIOD="2000-10-23" OBS_VALUE="-2.66943" BBK_DIFF_A="-0.96459"/>
      <bbk:Obs TIME_PERIOD="2000-10-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-10-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-10-20" OBS_VALUE="-1.70484" BBK_DIFF_A="0.32371"/>
      <bbk:Obs TIME_PERIOD="2000-10-19" OBS_VALUE="-2.02855" BBK_DIFF_A="-0.01913"/>
      <bbk:Obs TIME_PERIOD="2000-10-18" OBS_VALUE="-2.00942" BBK_DIFF_A="0.10047"/>
      <bbk:Obs TIME_PERIOD="2000-10-17" OBS_VALUE="-2.10989" BBK_DIFF_A="-0.70437"/>
      <bbk:Obs TIME_PERIOD="2000-10-16" OBS_VALUE="-1.40552" BBK_DIFF_A="-0.13195"/>
      <bbk:Obs TIME_PERIOD="2000-10-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-10-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-10-13" OBS_VALUE="-1.27357" BBK_DIFF_A="0.91169"/>
      <bbk:Obs TIME_PERIOD="2000-10-12" OBS_VALUE="-2.18526" BBK_DIFF_A="-0.12105"/>
      <bbk:Obs TIME_PERIOD="2000-10-11" OBS_VALUE="-2.06421" BBK_DIFF_A="-0.27206"/>
      <bbk:Obs TIME_PERIOD="2000-10-10" OBS_VALUE="-1.79215" BBK_DIFF_A="0.13336"/>
      <bbk:Obs TIME_PERIOD="2000-10-09" OBS_VALUE="-1.92551" BBK_DIFF_A="0.27591"/>
      <bbk:Obs TIME_PERIOD="2000-10-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-10-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-10-06" OBS_VALUE="-2.20142" BBK_DIFF_A="0.1485"/>
      <bbk:Obs TIME_PERIOD="2000-10-05" OBS_VALUE="-2.34992" BBK_DIFF_A="1.29553"/>
      <bbk:Obs TIME_PERIOD="2000-10-04" OBS_VALUE="-3.64545" BBK_DIFF_A="-1.2229"/>
      <bbk:Obs TIME_PERIOD="2000-10-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-10-02" OBS_VALUE="-2.42255" BBK_DIFF_A="-0.33858"/>
      <bbk:Obs TIME_PERIOD="2000-10-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-09-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-09-29" OBS_VALUE="-2.08397" BBK_DIFF_A="-0.02454"/>
      <bbk:Obs TIME_PERIOD="2000-09-28" OBS_VALUE="-2.05943" BBK_DIFF_A="0.06873"/>
      <bbk:Obs TIME_PERIOD="2000-09-27" OBS_VALUE="-2.12816" BBK_DIFF_A="-0.29893"/>
      <bbk:Obs TIME_PERIOD="2000-09-26" OBS_VALUE="-1.82923" BBK_DIFF_A="0.16703"/>
      <bbk:Obs TIME_PERIOD="2000-09-25" OBS_VALUE="-1.99626" BBK_DIFF_A="-0.14579"/>
      <bbk:Obs TIME_PERIOD="2000-09-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-09-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-09-22" OBS_VALUE="-1.85047" BBK_DIFF_A="0.30653"/>
      <bbk:Obs TIME_PERIOD="2000-09-21" OBS_VALUE="-2.157" BBK_DIFF_A="-0.02266"/>
      <bbk:Obs TIME_PERIOD="2000-09-20" OBS_VALUE="-2.13434" BBK_DIFF_A="0.26993"/>
      <bbk:Obs TIME_PERIOD="2000-09-19" OBS_VALUE="-2.40427" BBK_DIFF_A="-0.18462"/>
      <bbk:Obs TIME_PERIOD="2000-09-18" OBS_VALUE="-2.21965" BBK_DIFF_A="-0.29071"/>
      <bbk:Obs TIME_PERIOD="2000-09-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-09-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-09-15" OBS_VALUE="-1.92894" BBK_DIFF_A="-0.31938"/>
      <bbk:Obs TIME_PERIOD="2000-09-14" OBS_VALUE="-1.60956" BBK_DIFF_A="-0.08711"/>
      <bbk:Obs TIME_PERIOD="2000-09-13" OBS_VALUE="-1.52245" BBK_DIFF_A="-0.30171"/>
      <bbk:Obs TIME_PERIOD="2000-09-12" OBS_VALUE="-1.22074" BBK_DIFF_A="-0.10604"/>
      <bbk:Obs TIME_PERIOD="2000-09-11" OBS_VALUE="-1.1147" BBK_DIFF_A="-0.07803"/>
      <bbk:Obs TIME_PERIOD="2000-09-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-09-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-09-08" OBS_VALUE="-1.03667" BBK_DIFF_A="0.2263"/>
      <bbk:Obs TIME_PERIOD="2000-09-07" OBS_VALUE="-1.26297" BBK_DIFF_A="-0.07633"/>
      <bbk:Obs TIME_PERIOD="2000-09-06" OBS_VALUE="-1.18664" BBK_DIFF_A="0.02396"/>
      <bbk:Obs TIME_PERIOD="2000-09-05" OBS_VALUE="-1.2106" BBK_DIFF_A="0.00998"/>
      <bbk:Obs TIME_PERIOD="2000-09-04" OBS_VALUE="-1.22058" BBK_DIFF_A="-0.02414"/>
      <bbk:Obs TIME_PERIOD="2000-09-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-09-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-09-01" OBS_VALUE="-1.19644" BBK_DIFF_A="-0.27322"/>
      <bbk:Obs TIME_PERIOD="2000-08-31" OBS_VALUE="-0.92322" BBK_DIFF_A="-0.16519"/>
      <bbk:Obs TIME_PERIOD="2000-08-30" OBS_VALUE="-0.75803" BBK_DIFF_A="-0.11444"/>
      <bbk:Obs TIME_PERIOD="2000-08-29" OBS_VALUE="-0.64359" BBK_DIFF_A="0.14614"/>
      <bbk:Obs TIME_PERIOD="2000-08-28" OBS_VALUE="-0.78973" BBK_DIFF_A="0.1366"/>
      <bbk:Obs TIME_PERIOD="2000-08-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-08-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-08-25" OBS_VALUE="-0.92633" BBK_DIFF_A="-0.53295"/>
      <bbk:Obs TIME_PERIOD="2000-08-24" OBS_VALUE="-0.39338" BBK_DIFF_A="0.33531"/>
      <bbk:Obs TIME_PERIOD="2000-08-23" OBS_VALUE="-0.72869" BBK_DIFF_A="0.26673"/>
      <bbk:Obs TIME_PERIOD="2000-08-22" OBS_VALUE="-0.99542" BBK_DIFF_A="0.0258"/>
      <bbk:Obs TIME_PERIOD="2000-08-21" OBS_VALUE="-1.02122" BBK_DIFF_A="-0.16117"/>
      <bbk:Obs TIME_PERIOD="2000-08-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-08-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-08-18" OBS_VALUE="-0.86005" BBK_DIFF_A="0.13603"/>
      <bbk:Obs TIME_PERIOD="2000-08-17" OBS_VALUE="-0.99608" BBK_DIFF_A="0.10065"/>
      <bbk:Obs TIME_PERIOD="2000-08-16" OBS_VALUE="-1.09673" BBK_DIFF_A="-0.08927"/>
      <bbk:Obs TIME_PERIOD="2000-08-15" OBS_VALUE="-1.00746" BBK_DIFF_A="0.12143"/>
      <bbk:Obs TIME_PERIOD="2000-08-14" OBS_VALUE="-1.12889" BBK_DIFF_A="-0.14798"/>
      <bbk:Obs TIME_PERIOD="2000-08-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-08-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-08-11" OBS_VALUE="-0.98091" BBK_DIFF_A="0.10826"/>
      <bbk:Obs TIME_PERIOD="2000-08-10" OBS_VALUE="-1.08917" BBK_DIFF_A="0.03301"/>
      <bbk:Obs TIME_PERIOD="2000-08-09" OBS_VALUE="-1.12218" BBK_DIFF_A="0.09798"/>
      <bbk:Obs TIME_PERIOD="2000-08-08" OBS_VALUE="-1.22016" BBK_DIFF_A="0.03054"/>
      <bbk:Obs TIME_PERIOD="2000-08-07" OBS_VALUE="-1.2507" BBK_DIFF_A="-0.03962"/>
      <bbk:Obs TIME_PERIOD="2000-08-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-08-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-08-04" OBS_VALUE="-1.21108" BBK_DIFF_A="2.0E-4"/>
      <bbk:Obs TIME_PERIOD="2000-08-03" OBS_VALUE="-1.21128" BBK_DIFF_A="-0.05621"/>
      <bbk:Obs TIME_PERIOD="2000-08-02" OBS_VALUE="-1.15507" BBK_DIFF_A="0.08128"/>
      <bbk:Obs TIME_PERIOD="2000-08-01" OBS_VALUE="-1.23635" BBK_DIFF_A="0.01921"/>
      <bbk:Obs TIME_PERIOD="2000-07-31" OBS_VALUE="-1.25556" BBK_DIFF_A="0.02845"/>
      <bbk:Obs TIME_PERIOD="2000-07-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-07-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-07-28" OBS_VALUE="-1.28401" BBK_DIFF_A="0.01448"/>
      <bbk:Obs TIME_PERIOD="2000-07-27" OBS_VALUE="-1.29849" BBK_DIFF_A="0.05096"/>
      <bbk:Obs TIME_PERIOD="2000-07-26" OBS_VALUE="-1.34945" BBK_DIFF_A="-0.02089"/>
      <bbk:Obs TIME_PERIOD="2000-07-25" OBS_VALUE="-1.32856" BBK_DIFF_A="-0.00769"/>
      <bbk:Obs TIME_PERIOD="2000-07-24" OBS_VALUE="-1.32087" BBK_DIFF_A="-0.01204"/>
      <bbk:Obs TIME_PERIOD="2000-07-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-07-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-07-21" OBS_VALUE="-1.30883" BBK_DIFF_A="0.04511"/>
      <bbk:Obs TIME_PERIOD="2000-07-20" OBS_VALUE="-1.35394" BBK_DIFF_A="-0.02894"/>
      <bbk:Obs TIME_PERIOD="2000-07-19" OBS_VALUE="-1.325" BBK_DIFF_A="0.05746"/>
      <bbk:Obs TIME_PERIOD="2000-07-18" OBS_VALUE="-1.38246" BBK_DIFF_A="0.12332"/>
      <bbk:Obs TIME_PERIOD="2000-07-17" OBS_VALUE="-1.50578" BBK_DIFF_A="-0.04591"/>
      <bbk:Obs TIME_PERIOD="2000-07-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-07-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-07-14" OBS_VALUE="-1.45987" BBK_DIFF_A="-0.00944"/>
      <bbk:Obs TIME_PERIOD="2000-07-13" OBS_VALUE="-1.45043" BBK_DIFF_A="-0.00983"/>
      <bbk:Obs TIME_PERIOD="2000-07-12" OBS_VALUE="-1.4406" BBK_DIFF_A="0.04461"/>
      <bbk:Obs TIME_PERIOD="2000-07-11" OBS_VALUE="-1.48521" BBK_DIFF_A="0.02098"/>
      <bbk:Obs TIME_PERIOD="2000-07-10" OBS_VALUE="-1.50619" BBK_DIFF_A="0.05204"/>
      <bbk:Obs TIME_PERIOD="2000-07-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-07-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-07-07" OBS_VALUE="-1.55823" BBK_DIFF_A="-0.42482"/>
      <bbk:Obs TIME_PERIOD="2000-07-06" OBS_VALUE="-1.13341" BBK_DIFF_A="0.45406"/>
      <bbk:Obs TIME_PERIOD="2000-07-05" OBS_VALUE="-1.58747" BBK_DIFF_A="-0.14525"/>
      <bbk:Obs TIME_PERIOD="2000-07-04" OBS_VALUE="-1.44222" BBK_DIFF_A="0.1478"/>
      <bbk:Obs TIME_PERIOD="2000-07-03" OBS_VALUE="-1.59002" BBK_DIFF_A="-0.09873"/>
      <bbk:Obs TIME_PERIOD="2000-07-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-07-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-06-30" OBS_VALUE="-1.49129" BBK_DIFF_A="0.02285"/>
      <bbk:Obs TIME_PERIOD="2000-06-29" OBS_VALUE="-1.51414" BBK_DIFF_A="-0.094"/>
      <bbk:Obs TIME_PERIOD="2000-06-28" OBS_VALUE="-1.42014" BBK_DIFF_A="-0.01892"/>
      <bbk:Obs TIME_PERIOD="2000-06-27" OBS_VALUE="-1.40122" BBK_DIFF_A="0.11142"/>
      <bbk:Obs TIME_PERIOD="2000-06-26" OBS_VALUE="-1.51264" BBK_DIFF_A="0.00904"/>
      <bbk:Obs TIME_PERIOD="2000-06-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-06-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-06-23" OBS_VALUE="-1.52168" BBK_DIFF_A="0.05059"/>
      <bbk:Obs TIME_PERIOD="2000-06-22" OBS_VALUE="-1.57227" BBK_DIFF_A="-0.16918"/>
      <bbk:Obs TIME_PERIOD="2000-06-21" OBS_VALUE="-1.40309" BBK_DIFF_A="-0.01246"/>
      <bbk:Obs TIME_PERIOD="2000-06-20" OBS_VALUE="-1.39063" BBK_DIFF_A="0.10184"/>
      <bbk:Obs TIME_PERIOD="2000-06-19" OBS_VALUE="-1.49247" BBK_DIFF_A="-0.05028"/>
      <bbk:Obs TIME_PERIOD="2000-06-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-06-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-06-16" OBS_VALUE="-1.44219" BBK_DIFF_A="0.06812"/>
      <bbk:Obs TIME_PERIOD="2000-06-15" OBS_VALUE="-1.51031" BBK_DIFF_A="-0.46836"/>
      <bbk:Obs TIME_PERIOD="2000-06-14" OBS_VALUE="-1.04195" BBK_DIFF_A="0.36367"/>
      <bbk:Obs TIME_PERIOD="2000-06-13" OBS_VALUE="-1.40562" BBK_DIFF_A="-0.09727"/>
      <bbk:Obs TIME_PERIOD="2000-06-12" OBS_VALUE="-1.30835" BBK_DIFF_A="0.04213"/>
      <bbk:Obs TIME_PERIOD="2000-06-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-06-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-06-09" OBS_VALUE="-1.35048" BBK_DIFF_A="0.17241"/>
      <bbk:Obs TIME_PERIOD="2000-06-08" OBS_VALUE="-1.52289" BBK_DIFF_A="0.09965"/>
      <bbk:Obs TIME_PERIOD="2000-06-07" OBS_VALUE="-1.62254" BBK_DIFF_A="-0.00131"/>
      <bbk:Obs TIME_PERIOD="2000-06-06" OBS_VALUE="-1.62123" BBK_DIFF_A="-0.05051"/>
      <bbk:Obs TIME_PERIOD="2000-06-05" OBS_VALUE="-1.57072" BBK_DIFF_A="-0.01874"/>
      <bbk:Obs TIME_PERIOD="2000-06-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-06-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-06-02" OBS_VALUE="-1.55198" BBK_DIFF_A="-0.06941"/>
      <bbk:Obs TIME_PERIOD="2000-06-01" OBS_VALUE="-1.48257" BBK_DIFF_A="0.02929"/>
      <bbk:Obs TIME_PERIOD="2000-05-31" OBS_VALUE="-1.51186" BBK_DIFF_A="0.13254"/>
      <bbk:Obs TIME_PERIOD="2000-05-30" OBS_VALUE="-1.6444" BBK_DIFF_A="0.02129"/>
      <bbk:Obs TIME_PERIOD="2000-05-29" OBS_VALUE="-1.66569" BBK_DIFF_A="0.01589"/>
      <bbk:Obs TIME_PERIOD="2000-05-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-05-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-05-26" OBS_VALUE="-1.68158" BBK_DIFF_A="0.11634"/>
      <bbk:Obs TIME_PERIOD="2000-05-25" OBS_VALUE="-1.79792" BBK_DIFF_A="-0.01417"/>
      <bbk:Obs TIME_PERIOD="2000-05-24" OBS_VALUE="-1.78375" BBK_DIFF_A="-0.12694"/>
      <bbk:Obs TIME_PERIOD="2000-05-23" OBS_VALUE="-1.65681" BBK_DIFF_A="-0.82257"/>
      <bbk:Obs TIME_PERIOD="2000-05-22" OBS_VALUE="-0.83424" BBK_DIFF_A="0.99978"/>
      <bbk:Obs TIME_PERIOD="2000-05-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-05-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-05-19" OBS_VALUE="-1.83402" BBK_DIFF_A="-0.05654"/>
      <bbk:Obs TIME_PERIOD="2000-05-18" OBS_VALUE="-1.77748" BBK_DIFF_A="-0.55493"/>
      <bbk:Obs TIME_PERIOD="2000-05-17" OBS_VALUE="-1.22255" BBK_DIFF_A="0.57541"/>
      <bbk:Obs TIME_PERIOD="2000-05-16" OBS_VALUE="-1.79796" BBK_DIFF_A="0.02134"/>
      <bbk:Obs TIME_PERIOD="2000-05-15" OBS_VALUE="-1.8193" BBK_DIFF_A="0.03519"/>
      <bbk:Obs TIME_PERIOD="2000-05-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-05-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-05-12" OBS_VALUE="-1.85449" BBK_DIFF_A="0.06304"/>
      <bbk:Obs TIME_PERIOD="2000-05-11" OBS_VALUE="-1.91753" BBK_DIFF_A="-0.06982"/>
      <bbk:Obs TIME_PERIOD="2000-05-10" OBS_VALUE="-1.84771" BBK_DIFF_A="0.11125"/>
      <bbk:Obs TIME_PERIOD="2000-05-09" OBS_VALUE="-1.95896" BBK_DIFF_A="0.07306"/>
      <bbk:Obs TIME_PERIOD="2000-05-08" OBS_VALUE="-2.03202" BBK_DIFF_A="-0.03014"/>
      <bbk:Obs TIME_PERIOD="2000-05-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-05-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-05-05" OBS_VALUE="-2.00188" BBK_DIFF_A="0.14899"/>
      <bbk:Obs TIME_PERIOD="2000-05-04" OBS_VALUE="-2.15087" BBK_DIFF_A="-0.02161"/>
      <bbk:Obs TIME_PERIOD="2000-05-03" OBS_VALUE="-2.12926" BBK_DIFF_A="0.06928"/>
      <bbk:Obs TIME_PERIOD="2000-05-02" OBS_VALUE="-2.19854" BBK_DIFF_A="0.04062"/>
      <bbk:Obs TIME_PERIOD="2000-05-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-04-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-04-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-04-28" OBS_VALUE="-2.23916" BBK_DIFF_A="0.36556"/>
      <bbk:Obs TIME_PERIOD="2000-04-27" OBS_VALUE="-2.60472" BBK_DIFF_A="0.21334"/>
      <bbk:Obs TIME_PERIOD="2000-04-26" OBS_VALUE="-2.81806" BBK_DIFF_A="-0.0511"/>
      <bbk:Obs TIME_PERIOD="2000-04-25" OBS_VALUE="-2.76696" BBK_DIFF_A="0.23081"/>
      <bbk:Obs TIME_PERIOD="2000-04-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-04-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-04-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-04-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-04-20" OBS_VALUE="-2.99777" BBK_DIFF_A="-0.04515"/>
      <bbk:Obs TIME_PERIOD="2000-04-19" OBS_VALUE="-2.95262" BBK_DIFF_A="0.43582"/>
      <bbk:Obs TIME_PERIOD="2000-04-18" OBS_VALUE="-3.38844" BBK_DIFF_A="-0.17925"/>
      <bbk:Obs TIME_PERIOD="2000-04-17" OBS_VALUE="-3.20919" BBK_DIFF_A="-0.3392"/>
      <bbk:Obs TIME_PERIOD="2000-04-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-04-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-04-14" OBS_VALUE="-2.86999" BBK_DIFF_A="1.1E-4"/>
      <bbk:Obs TIME_PERIOD="2000-04-13" OBS_VALUE="-2.8701" BBK_DIFF_A="0.16266"/>
      <bbk:Obs TIME_PERIOD="2000-04-12" OBS_VALUE="-3.03276" BBK_DIFF_A="-0.04104"/>
      <bbk:Obs TIME_PERIOD="2000-04-11" OBS_VALUE="-2.99172" BBK_DIFF_A="0.19238"/>
      <bbk:Obs TIME_PERIOD="2000-04-10" OBS_VALUE="-3.1841" BBK_DIFF_A="0.10103"/>
      <bbk:Obs TIME_PERIOD="2000-04-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-04-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-04-07" OBS_VALUE="-3.28513" BBK_DIFF_A="0.65725"/>
      <bbk:Obs TIME_PERIOD="2000-04-06" OBS_VALUE="-3.94238" BBK_DIFF_A="0.82344"/>
      <bbk:Obs TIME_PERIOD="2000-04-05" OBS_VALUE="-4.76582" BBK_DIFF_A="-1.45714"/>
      <bbk:Obs TIME_PERIOD="2000-04-04" OBS_VALUE="-3.30868" BBK_DIFF_A="-0.18631"/>
      <bbk:Obs TIME_PERIOD="2000-04-03" OBS_VALUE="-3.12237" BBK_DIFF_A="0.24773"/>
      <bbk:Obs TIME_PERIOD="2000-04-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-04-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-03-31" OBS_VALUE="-3.3701" BBK_DIFF_A="0.38416"/>
      <bbk:Obs TIME_PERIOD="2000-03-30" OBS_VALUE="-3.75426" BBK_DIFF_A="-0.30326"/>
      <bbk:Obs TIME_PERIOD="2000-03-29" OBS_VALUE="-3.451" BBK_DIFF_A="0.1237"/>
      <bbk:Obs TIME_PERIOD="2000-03-28" OBS_VALUE="-3.5747" BBK_DIFF_A="0.31555"/>
      <bbk:Obs TIME_PERIOD="2000-03-27" OBS_VALUE="-3.89025" BBK_DIFF_A="-0.40993"/>
      <bbk:Obs TIME_PERIOD="2000-03-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-03-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-03-24" OBS_VALUE="-3.48032" BBK_DIFF_A="0.13293"/>
      <bbk:Obs TIME_PERIOD="2000-03-23" OBS_VALUE="-3.61325" BBK_DIFF_A="0.19784"/>
      <bbk:Obs TIME_PERIOD="2000-03-22" OBS_VALUE="-3.81109" BBK_DIFF_A="-0.45916"/>
      <bbk:Obs TIME_PERIOD="2000-03-21" OBS_VALUE="-3.35193" BBK_DIFF_A="-0.12691"/>
      <bbk:Obs TIME_PERIOD="2000-03-20" OBS_VALUE="-3.22502" BBK_DIFF_A="0.45324"/>
      <bbk:Obs TIME_PERIOD="2000-03-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-03-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-03-17" OBS_VALUE="-3.67826" BBK_DIFF_A="-0.13399"/>
      <bbk:Obs TIME_PERIOD="2000-03-16" OBS_VALUE="-3.54427" BBK_DIFF_A="-0.18334"/>
      <bbk:Obs TIME_PERIOD="2000-03-15" OBS_VALUE="-3.36093" BBK_DIFF_A="-0.11672"/>
      <bbk:Obs TIME_PERIOD="2000-03-14" OBS_VALUE="-3.24421" BBK_DIFF_A="-0.36582"/>
      <bbk:Obs TIME_PERIOD="2000-03-13" OBS_VALUE="-2.87839" BBK_DIFF_A="0.34987"/>
      <bbk:Obs TIME_PERIOD="2000-03-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-03-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-03-10" OBS_VALUE="-3.22826" BBK_DIFF_A="-0.46354"/>
      <bbk:Obs TIME_PERIOD="2000-03-09" OBS_VALUE="-2.76472" BBK_DIFF_A="0.36736"/>
      <bbk:Obs TIME_PERIOD="2000-03-08" OBS_VALUE="-3.13208" BBK_DIFF_A="0.23074"/>
      <bbk:Obs TIME_PERIOD="2000-03-07" OBS_VALUE="-3.36282" BBK_DIFF_A="0.02509"/>
      <bbk:Obs TIME_PERIOD="2000-03-06" OBS_VALUE="-3.38791" BBK_DIFF_A="0.21766"/>
      <bbk:Obs TIME_PERIOD="2000-03-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-03-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-03-03" OBS_VALUE="-3.60557" BBK_DIFF_A="0.19398"/>
      <bbk:Obs TIME_PERIOD="2000-03-02" OBS_VALUE="-3.79955" BBK_DIFF_A="0.19913"/>
      <bbk:Obs TIME_PERIOD="2000-03-01" OBS_VALUE="-3.99868" BBK_DIFF_A="-0.10121"/>
      <bbk:Obs TIME_PERIOD="2000-02-29" OBS_VALUE="-3.89747" BBK_DIFF_A="0.37203"/>
      <bbk:Obs TIME_PERIOD="2000-02-28" OBS_VALUE="-4.2695" BBK_DIFF_A="-0.21092"/>
      <bbk:Obs TIME_PERIOD="2000-02-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-02-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-02-25" OBS_VALUE="-4.05858" BBK_DIFF_A="-0.08681"/>
      <bbk:Obs TIME_PERIOD="2000-02-24" OBS_VALUE="-3.97177" BBK_DIFF_A="0.00819"/>
      <bbk:Obs TIME_PERIOD="2000-02-23" OBS_VALUE="-3.97996" BBK_DIFF_A="-0.30217"/>
      <bbk:Obs TIME_PERIOD="2000-02-22" OBS_VALUE="-3.67779" BBK_DIFF_A="-1.07281"/>
      <bbk:Obs TIME_PERIOD="2000-02-21" OBS_VALUE="-2.60498" BBK_DIFF_A="0.20617"/>
      <bbk:Obs TIME_PERIOD="2000-02-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-02-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-02-18" OBS_VALUE="-2.81115" BBK_DIFF_A="1.65069"/>
      <bbk:Obs TIME_PERIOD="2000-02-17" OBS_VALUE="-4.46184" BBK_DIFF_A="1.19748"/>
      <bbk:Obs TIME_PERIOD="2000-02-16" OBS_VALUE="-5.65932" BBK_DIFF_A="-0.03743"/>
      <bbk:Obs TIME_PERIOD="2000-02-15" OBS_VALUE="-5.62189" BBK_DIFF_A="0.05817"/>
      <bbk:Obs TIME_PERIOD="2000-02-14" OBS_VALUE="-5.68006" BBK_DIFF_A="-1.41747"/>
      <bbk:Obs TIME_PERIOD="2000-02-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-02-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-02-11" OBS_VALUE="-4.26259" BBK_DIFF_A="0.96716"/>
      <bbk:Obs TIME_PERIOD="2000-02-10" OBS_VALUE="-5.22975" BBK_DIFF_A="0.13229"/>
      <bbk:Obs TIME_PERIOD="2000-02-09" OBS_VALUE="-5.36204" BBK_DIFF_A="-0.09929"/>
      <bbk:Obs TIME_PERIOD="2000-02-08" OBS_VALUE="-5.26275" BBK_DIFF_A="-0.22492"/>
      <bbk:Obs TIME_PERIOD="2000-02-07" OBS_VALUE="-5.03783" BBK_DIFF_A="-0.71729"/>
      <bbk:Obs TIME_PERIOD="2000-02-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-02-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-02-04" OBS_VALUE="-4.32054" BBK_DIFF_A="-0.05671"/>
      <bbk:Obs TIME_PERIOD="2000-02-03" OBS_VALUE="-4.26383" BBK_DIFF_A="-0.11131"/>
      <bbk:Obs TIME_PERIOD="2000-02-02" OBS_VALUE="-4.15252" BBK_DIFF_A="0.72457"/>
      <bbk:Obs TIME_PERIOD="2000-02-01" OBS_VALUE="-4.87709" BBK_DIFF_A="-0.00558"/>
      <bbk:Obs TIME_PERIOD="2000-01-31" OBS_VALUE="-4.87151" BBK_DIFF_A="-0.10365"/>
      <bbk:Obs TIME_PERIOD="2000-01-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-01-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-01-28" OBS_VALUE="-4.76786" BBK_DIFF_A="0.32589"/>
      <bbk:Obs TIME_PERIOD="2000-01-27" OBS_VALUE="-5.09375" BBK_DIFF_A="0.10117"/>
      <bbk:Obs TIME_PERIOD="2000-01-26" OBS_VALUE="-5.19492" BBK_DIFF_A="0.1728"/>
      <bbk:Obs TIME_PERIOD="2000-01-25" OBS_VALUE="-5.36772" BBK_DIFF_A="0.28032"/>
      <bbk:Obs TIME_PERIOD="2000-01-24" OBS_VALUE="-5.64804" BBK_DIFF_A="0.21731"/>
      <bbk:Obs TIME_PERIOD="2000-01-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-01-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-01-21" OBS_VALUE="-5.86535" BBK_DIFF_A="-0.99487"/>
      <bbk:Obs TIME_PERIOD="2000-01-20" OBS_VALUE="-4.87048" BBK_DIFF_A="-0.00838"/>
      <bbk:Obs TIME_PERIOD="2000-01-19" OBS_VALUE="-4.8621" BBK_DIFF_A="0.1764"/>
      <bbk:Obs TIME_PERIOD="2000-01-18" OBS_VALUE="-5.0385" BBK_DIFF_A="0.05321"/>
      <bbk:Obs TIME_PERIOD="2000-01-17" OBS_VALUE="-5.09171" BBK_DIFF_A="-0.04662"/>
      <bbk:Obs TIME_PERIOD="2000-01-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-01-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-01-14" OBS_VALUE="-5.04509" BBK_DIFF_A="-0.45478"/>
      <bbk:Obs TIME_PERIOD="2000-01-13" OBS_VALUE="-4.59031" BBK_DIFF_A="-0.2621"/>
      <bbk:Obs TIME_PERIOD="2000-01-12" OBS_VALUE="-4.32821" BBK_DIFF_A="-0.38738"/>
      <bbk:Obs TIME_PERIOD="2000-01-11" OBS_VALUE="-3.94083" BBK_DIFF_A="-0.15212"/>
      <bbk:Obs TIME_PERIOD="2000-01-10" OBS_VALUE="-3.78871" BBK_DIFF_A="0.45957"/>
      <bbk:Obs TIME_PERIOD="2000-01-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-01-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-01-07" OBS_VALUE="-4.24828" BBK_DIFF_A="0.13798"/>
      <bbk:Obs TIME_PERIOD="2000-01-06" OBS_VALUE="-4.38626" BBK_DIFF_A="-0.04669"/>
      <bbk:Obs TIME_PERIOD="2000-01-05" OBS_VALUE="-4.33957" BBK_DIFF_A="0.40426"/>
      <bbk:Obs TIME_PERIOD="2000-01-04" OBS_VALUE="-4.74383" BBK_DIFF_A="0.21528"/>
      <bbk:Obs TIME_PERIOD="2000-01-03" OBS_VALUE="-4.95911" BBK_DIFF_A="-0.59038"/>
      <bbk:Obs TIME_PERIOD="2000-01-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2000-01-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-12-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-12-30" OBS_VALUE="-4.36873" BBK_DIFF_A="-0.39909"/>
      <bbk:Obs TIME_PERIOD="1999-12-29" OBS_VALUE="-3.96964" BBK_DIFF_A="0.23757"/>
      <bbk:Obs TIME_PERIOD="1999-12-28" OBS_VALUE="-4.20721" BBK_DIFF_A="-0.11701"/>
      <bbk:Obs TIME_PERIOD="1999-12-27" OBS_VALUE="-4.0902" BBK_DIFF_A="0.22781"/>
      <bbk:Obs TIME_PERIOD="1999-12-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-12-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-12-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-12-23" OBS_VALUE="-4.31801" BBK_DIFF_A="-0.01668"/>
      <bbk:Obs TIME_PERIOD="1999-12-22" OBS_VALUE="-4.30133" BBK_DIFF_A="0.36472"/>
      <bbk:Obs TIME_PERIOD="1999-12-21" OBS_VALUE="-4.66605" BBK_DIFF_A="0.29916"/>
      <bbk:Obs TIME_PERIOD="1999-12-20" OBS_VALUE="-4.96521" BBK_DIFF_A="-0.34897"/>
      <bbk:Obs TIME_PERIOD="1999-12-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-12-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-12-17" OBS_VALUE="-4.61624" BBK_DIFF_A="-0.42923"/>
      <bbk:Obs TIME_PERIOD="1999-12-16" OBS_VALUE="-4.18701" BBK_DIFF_A="0.377"/>
      <bbk:Obs TIME_PERIOD="1999-12-15" OBS_VALUE="-4.56401" BBK_DIFF_A="-0.12194"/>
      <bbk:Obs TIME_PERIOD="1999-12-14" OBS_VALUE="-4.44207" BBK_DIFF_A="0.26704"/>
      <bbk:Obs TIME_PERIOD="1999-12-13" OBS_VALUE="-4.70911" BBK_DIFF_A="0.70832"/>
      <bbk:Obs TIME_PERIOD="1999-12-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-12-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-12-10" OBS_VALUE="-5.41743" BBK_DIFF_A="-0.29699"/>
      <bbk:Obs TIME_PERIOD="1999-12-09" OBS_VALUE="-5.12044" BBK_DIFF_A="0.3159"/>
      <bbk:Obs TIME_PERIOD="1999-12-08" OBS_VALUE="-5.43634" BBK_DIFF_A="-0.03288"/>
      <bbk:Obs TIME_PERIOD="1999-12-07" OBS_VALUE="-5.40346" BBK_DIFF_A="0.17082"/>
      <bbk:Obs TIME_PERIOD="1999-12-06" OBS_VALUE="-5.57428" BBK_DIFF_A="0.08804"/>
      <bbk:Obs TIME_PERIOD="1999-12-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-12-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-12-03" OBS_VALUE="-5.66232" BBK_DIFF_A="-0.03315"/>
      <bbk:Obs TIME_PERIOD="1999-12-02" OBS_VALUE="-5.62917" BBK_DIFF_A="0.00959"/>
      <bbk:Obs TIME_PERIOD="1999-12-01" OBS_VALUE="-5.63876" BBK_DIFF_A="0.06023"/>
      <bbk:Obs TIME_PERIOD="1999-11-30" OBS_VALUE="-5.69899" BBK_DIFF_A="0.01873"/>
      <bbk:Obs TIME_PERIOD="1999-11-29" OBS_VALUE="-5.71772" BBK_DIFF_A="0.01495"/>
      <bbk:Obs TIME_PERIOD="1999-11-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-11-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-11-26" OBS_VALUE="-5.73267" BBK_DIFF_A="-0.06071"/>
      <bbk:Obs TIME_PERIOD="1999-11-25" OBS_VALUE="-5.67196" BBK_DIFF_A="0.02023"/>
      <bbk:Obs TIME_PERIOD="1999-11-24" OBS_VALUE="-5.69219" BBK_DIFF_A="-0.08774"/>
      <bbk:Obs TIME_PERIOD="1999-11-23" OBS_VALUE="-5.60445" BBK_DIFF_A="0.0248"/>
      <bbk:Obs TIME_PERIOD="1999-11-22" OBS_VALUE="-5.62925" BBK_DIFF_A="-0.05105"/>
      <bbk:Obs TIME_PERIOD="1999-11-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-11-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-11-19" OBS_VALUE="-5.5782" BBK_DIFF_A="0.01187"/>
      <bbk:Obs TIME_PERIOD="1999-11-18" OBS_VALUE="-5.59007" BBK_DIFF_A="-0.05144"/>
      <bbk:Obs TIME_PERIOD="1999-11-17" OBS_VALUE="-5.53863" BBK_DIFF_A="-0.01093"/>
      <bbk:Obs TIME_PERIOD="1999-11-16" OBS_VALUE="-5.5277" BBK_DIFF_A="0.04882"/>
      <bbk:Obs TIME_PERIOD="1999-11-15" OBS_VALUE="-5.57652" BBK_DIFF_A="-0.41004"/>
      <bbk:Obs TIME_PERIOD="1999-11-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-11-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-11-12" OBS_VALUE="-5.16648" BBK_DIFF_A="-2.19671"/>
      <bbk:Obs TIME_PERIOD="1999-11-11" OBS_VALUE="-2.96977" BBK_DIFF_A="2.62868"/>
      <bbk:Obs TIME_PERIOD="1999-11-10" OBS_VALUE="-5.59845" BBK_DIFF_A="-0.19906"/>
      <bbk:Obs TIME_PERIOD="1999-11-09" OBS_VALUE="-5.39939" BBK_DIFF_A="0.17654"/>
      <bbk:Obs TIME_PERIOD="1999-11-08" OBS_VALUE="-5.57593" BBK_DIFF_A="-0.44812"/>
      <bbk:Obs TIME_PERIOD="1999-11-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-11-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-11-05" OBS_VALUE="-5.12781" BBK_DIFF_A="0.17717"/>
      <bbk:Obs TIME_PERIOD="1999-11-04" OBS_VALUE="-5.30498" BBK_DIFF_A="-0.55349"/>
      <bbk:Obs TIME_PERIOD="1999-11-03" OBS_VALUE="-4.75149" BBK_DIFF_A="-0.0534"/>
      <bbk:Obs TIME_PERIOD="1999-11-02" OBS_VALUE="-4.69809" BBK_DIFF_A="0.50412"/>
      <bbk:Obs TIME_PERIOD="1999-11-01" OBS_VALUE="-5.20221" BBK_DIFF_A="0.30943"/>
      <bbk:Obs TIME_PERIOD="1999-10-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-10-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-10-29" OBS_VALUE="-5.51164" BBK_DIFF_A="-0.32729"/>
      <bbk:Obs TIME_PERIOD="1999-10-28" OBS_VALUE="-5.18435" BBK_DIFF_A="0.61997"/>
      <bbk:Obs TIME_PERIOD="1999-10-27" OBS_VALUE="-5.80432" BBK_DIFF_A="-0.35113"/>
      <bbk:Obs TIME_PERIOD="1999-10-26" OBS_VALUE="-5.45319" BBK_DIFF_A="-0.53224"/>
      <bbk:Obs TIME_PERIOD="1999-10-25" OBS_VALUE="-4.92095" BBK_DIFF_A="0.38856"/>
      <bbk:Obs TIME_PERIOD="1999-10-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-10-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-10-22" OBS_VALUE="-5.30951" BBK_DIFF_A="-0.14475"/>
      <bbk:Obs TIME_PERIOD="1999-10-21" OBS_VALUE="-5.16476" BBK_DIFF_A="-0.10669"/>
      <bbk:Obs TIME_PERIOD="1999-10-20" OBS_VALUE="-5.05807" BBK_DIFF_A="-0.36025"/>
      <bbk:Obs TIME_PERIOD="1999-10-19" OBS_VALUE="-4.69782" BBK_DIFF_A="0.03688"/>
      <bbk:Obs TIME_PERIOD="1999-10-18" OBS_VALUE="-4.7347" BBK_DIFF_A="0.2284"/>
      <bbk:Obs TIME_PERIOD="1999-10-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-10-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-10-15" OBS_VALUE="-4.9631" BBK_DIFF_A="-0.04596"/>
      <bbk:Obs TIME_PERIOD="1999-10-14" OBS_VALUE="-4.91714" BBK_DIFF_A="-0.12397"/>
      <bbk:Obs TIME_PERIOD="1999-10-13" OBS_VALUE="-4.79317" BBK_DIFF_A="0.19369"/>
      <bbk:Obs TIME_PERIOD="1999-10-12" OBS_VALUE="-4.98686" BBK_DIFF_A="-0.15336"/>
      <bbk:Obs TIME_PERIOD="1999-10-11" OBS_VALUE="-4.8335" BBK_DIFF_A="-0.16731"/>
      <bbk:Obs TIME_PERIOD="1999-10-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-10-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-10-08" OBS_VALUE="-4.66619" BBK_DIFF_A="-0.01684"/>
      <bbk:Obs TIME_PERIOD="1999-10-07" OBS_VALUE="-4.64935" BBK_DIFF_A="-0.23834"/>
      <bbk:Obs TIME_PERIOD="1999-10-06" OBS_VALUE="-4.41101" BBK_DIFF_A="0.01855"/>
      <bbk:Obs TIME_PERIOD="1999-10-05" OBS_VALUE="-4.42956" BBK_DIFF_A="0.25746"/>
      <bbk:Obs TIME_PERIOD="1999-10-04" OBS_VALUE="-4.68702" BBK_DIFF_A="-0.09078"/>
      <bbk:Obs TIME_PERIOD="1999-10-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-10-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-10-01" OBS_VALUE="-4.59624" BBK_DIFF_A="0.5253"/>
      <bbk:Obs TIME_PERIOD="1999-09-30" OBS_VALUE="-5.12154" BBK_DIFF_A="0.52551"/>
      <bbk:Obs TIME_PERIOD="1999-09-29" OBS_VALUE="-5.64705" BBK_DIFF_A="-0.44466"/>
      <bbk:Obs TIME_PERIOD="1999-09-28" OBS_VALUE="-5.20239" BBK_DIFF_A="0.60374"/>
      <bbk:Obs TIME_PERIOD="1999-09-27" OBS_VALUE="-5.80613" BBK_DIFF_A="-0.87679"/>
      <bbk:Obs TIME_PERIOD="1999-09-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-09-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-09-24" OBS_VALUE="-4.92934" BBK_DIFF_A="0.62377"/>
      <bbk:Obs TIME_PERIOD="1999-09-23" OBS_VALUE="-5.55311" BBK_DIFF_A="-0.05099"/>
      <bbk:Obs TIME_PERIOD="1999-09-22" OBS_VALUE="-5.50212" BBK_DIFF_A="0.1654"/>
      <bbk:Obs TIME_PERIOD="1999-09-21" OBS_VALUE="-5.66752" BBK_DIFF_A="0.06763"/>
      <bbk:Obs TIME_PERIOD="1999-09-20" OBS_VALUE="-5.73515" BBK_DIFF_A="-0.12602"/>
      <bbk:Obs TIME_PERIOD="1999-09-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-09-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-09-17" OBS_VALUE="-5.60913" BBK_DIFF_A="-0.13611"/>
      <bbk:Obs TIME_PERIOD="1999-09-16" OBS_VALUE="-5.47302" BBK_DIFF_A="-0.03337"/>
      <bbk:Obs TIME_PERIOD="1999-09-15" OBS_VALUE="-5.43965" BBK_DIFF_A="-0.19927"/>
      <bbk:Obs TIME_PERIOD="1999-09-14" OBS_VALUE="-5.24038" BBK_DIFF_A="-0.19994"/>
      <bbk:Obs TIME_PERIOD="1999-09-13" OBS_VALUE="-5.04044" BBK_DIFF_A="0.06837"/>
      <bbk:Obs TIME_PERIOD="1999-09-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-09-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-09-10" OBS_VALUE="-5.10881" BBK_DIFF_A="0.10326"/>
      <bbk:Obs TIME_PERIOD="1999-09-09" OBS_VALUE="-5.21207" BBK_DIFF_A="0.43573"/>
      <bbk:Obs TIME_PERIOD="1999-09-08" OBS_VALUE="-5.6478" BBK_DIFF_A="0.20854"/>
      <bbk:Obs TIME_PERIOD="1999-09-07" OBS_VALUE="-5.85634" BBK_DIFF_A="0.331"/>
      <bbk:Obs TIME_PERIOD="1999-09-06" OBS_VALUE="-6.18734" BBK_DIFF_A="-0.54522"/>
      <bbk:Obs TIME_PERIOD="1999-09-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-09-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-09-03" OBS_VALUE="-5.64212" BBK_DIFF_A="-0.45872"/>
      <bbk:Obs TIME_PERIOD="1999-09-02" OBS_VALUE="-5.1834" BBK_DIFF_A="-0.14123"/>
      <bbk:Obs TIME_PERIOD="1999-09-01" OBS_VALUE="-5.04217" BBK_DIFF_A="-0.28048"/>
      <bbk:Obs TIME_PERIOD="1999-08-31" OBS_VALUE="-4.76169" BBK_DIFF_A="-0.07272"/>
      <bbk:Obs TIME_PERIOD="1999-08-30" OBS_VALUE="-4.68897" BBK_DIFF_A="0.19115"/>
      <bbk:Obs TIME_PERIOD="1999-08-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-08-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-08-27" OBS_VALUE="-4.88012" BBK_DIFF_A="-2.83723"/>
      <bbk:Obs TIME_PERIOD="1999-08-26" OBS_VALUE="-2.04289" BBK_DIFF_A="2.77112"/>
      <bbk:Obs TIME_PERIOD="1999-08-25" OBS_VALUE="-4.81401" BBK_DIFF_A="0.14712"/>
      <bbk:Obs TIME_PERIOD="1999-08-24" OBS_VALUE="-4.96113" BBK_DIFF_A="0.02453"/>
      <bbk:Obs TIME_PERIOD="1999-08-23" OBS_VALUE="-4.98566" BBK_DIFF_A="0.16685"/>
      <bbk:Obs TIME_PERIOD="1999-08-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-08-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-08-20" OBS_VALUE="-5.15251" BBK_DIFF_A="-0.01599"/>
      <bbk:Obs TIME_PERIOD="1999-08-19" OBS_VALUE="-5.13652" BBK_DIFF_A="-3.03605"/>
      <bbk:Obs TIME_PERIOD="1999-08-18" OBS_VALUE="-2.10047" BBK_DIFF_A="2.569"/>
      <bbk:Obs TIME_PERIOD="1999-08-17" OBS_VALUE="-4.66947" BBK_DIFF_A="-0.07947"/>
      <bbk:Obs TIME_PERIOD="1999-08-16" OBS_VALUE="-4.59" BBK_DIFF_A="0.12467"/>
      <bbk:Obs TIME_PERIOD="1999-08-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-08-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-08-13" OBS_VALUE="-4.71467" BBK_DIFF_A="0.58157"/>
      <bbk:Obs TIME_PERIOD="1999-08-12" OBS_VALUE="-5.29624" BBK_DIFF_A="-0.07804"/>
      <bbk:Obs TIME_PERIOD="1999-08-11" OBS_VALUE="-5.2182" BBK_DIFF_A="-0.59348"/>
      <bbk:Obs TIME_PERIOD="1999-08-10" OBS_VALUE="-4.62472" BBK_DIFF_A="0.01697"/>
      <bbk:Obs TIME_PERIOD="1999-08-09" OBS_VALUE="-4.64169" BBK_DIFF_A="0.04546"/>
      <bbk:Obs TIME_PERIOD="1999-08-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-08-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-08-06" OBS_VALUE="-4.68715" BBK_DIFF_A="0.07717"/>
      <bbk:Obs TIME_PERIOD="1999-08-05" OBS_VALUE="-4.76432" BBK_DIFF_A="0.16587"/>
      <bbk:Obs TIME_PERIOD="1999-08-04" OBS_VALUE="-4.93019" BBK_DIFF_A="0.13313"/>
      <bbk:Obs TIME_PERIOD="1999-08-03" OBS_VALUE="-5.06332" BBK_DIFF_A="-0.05708"/>
      <bbk:Obs TIME_PERIOD="1999-08-02" OBS_VALUE="-5.00624" BBK_DIFF_A="-0.238"/>
      <bbk:Obs TIME_PERIOD="1999-08-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-07-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-07-30" OBS_VALUE="-4.76824" BBK_DIFF_A="-0.20302"/>
      <bbk:Obs TIME_PERIOD="1999-07-29" OBS_VALUE="-4.56522" BBK_DIFF_A="-4.5692"/>
      <bbk:Obs TIME_PERIOD="1999-07-28" OBS_VALUE="0.00398" BBK_DIFF_A="3.65207"/>
      <bbk:Obs TIME_PERIOD="1999-07-27" OBS_VALUE="-3.64809" BBK_DIFF_A="0.02943"/>
      <bbk:Obs TIME_PERIOD="1999-07-26" OBS_VALUE="-3.67752" BBK_DIFF_A="0.71745"/>
      <bbk:Obs TIME_PERIOD="1999-07-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-07-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-07-23" OBS_VALUE="-4.39497" BBK_DIFF_A="-0.97148"/>
      <bbk:Obs TIME_PERIOD="1999-07-22" OBS_VALUE="-3.42349" BBK_DIFF_A="1.53362"/>
      <bbk:Obs TIME_PERIOD="1999-07-21" OBS_VALUE="-4.95711" BBK_DIFF_A="-0.42426"/>
      <bbk:Obs TIME_PERIOD="1999-07-20" OBS_VALUE="-4.53285" BBK_DIFF_A="0.45692"/>
      <bbk:Obs TIME_PERIOD="1999-07-19" OBS_VALUE="-4.98977" BBK_DIFF_A="-0.46483"/>
      <bbk:Obs TIME_PERIOD="1999-07-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-07-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-07-16" OBS_VALUE="-4.52494" BBK_DIFF_A="-0.15909"/>
      <bbk:Obs TIME_PERIOD="1999-07-15" OBS_VALUE="-4.36585" BBK_DIFF_A="1.66938"/>
      <bbk:Obs TIME_PERIOD="1999-07-14" OBS_VALUE="-6.03523" BBK_DIFF_A="-1.68009"/>
      <bbk:Obs TIME_PERIOD="1999-07-13" OBS_VALUE="-4.35514" BBK_DIFF_A="0.20484"/>
      <bbk:Obs TIME_PERIOD="1999-07-12" OBS_VALUE="-4.55998" BBK_DIFF_A="1.549"/>
      <bbk:Obs TIME_PERIOD="1999-07-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-07-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-07-09" OBS_VALUE="-6.10898" BBK_DIFF_A="0.03574"/>
      <bbk:Obs TIME_PERIOD="1999-07-08" OBS_VALUE="-6.14472" BBK_DIFF_A="-2.12136"/>
      <bbk:Obs TIME_PERIOD="1999-07-07" OBS_VALUE="-4.02336" BBK_DIFF_A="0.80876"/>
      <bbk:Obs TIME_PERIOD="1999-07-06" OBS_VALUE="-4.83212" BBK_DIFF_A="1.15281"/>
      <bbk:Obs TIME_PERIOD="1999-07-05" OBS_VALUE="-5.98493" BBK_DIFF_A="0.02905"/>
      <bbk:Obs TIME_PERIOD="1999-07-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-07-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-07-02" OBS_VALUE="-6.01398" BBK_DIFF_A="-2.14067"/>
      <bbk:Obs TIME_PERIOD="1999-07-01" OBS_VALUE="-3.87331" BBK_DIFF_A="0.67683"/>
      <bbk:Obs TIME_PERIOD="1999-06-30" OBS_VALUE="-4.55014" BBK_DIFF_A="0.32138"/>
      <bbk:Obs TIME_PERIOD="1999-06-29" OBS_VALUE="-4.87152" BBK_DIFF_A="0.0363"/>
      <bbk:Obs TIME_PERIOD="1999-06-28" OBS_VALUE="-4.90782" BBK_DIFF_A="0.14471"/>
      <bbk:Obs TIME_PERIOD="1999-06-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-06-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-06-25" OBS_VALUE="-5.05253" BBK_DIFF_A="-1.15376"/>
      <bbk:Obs TIME_PERIOD="1999-06-24" OBS_VALUE="-3.89877" BBK_DIFF_A="0.62277"/>
      <bbk:Obs TIME_PERIOD="1999-06-23" OBS_VALUE="-4.52154" BBK_DIFF_A="-0.17776"/>
      <bbk:Obs TIME_PERIOD="1999-06-22" OBS_VALUE="-4.34378" BBK_DIFF_A="-0.40905"/>
      <bbk:Obs TIME_PERIOD="1999-06-21" OBS_VALUE="-3.93473" BBK_DIFF_A="0.46225"/>
      <bbk:Obs TIME_PERIOD="1999-06-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-06-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-06-18" OBS_VALUE="-4.39698" BBK_DIFF_A="-0.39511"/>
      <bbk:Obs TIME_PERIOD="1999-06-17" OBS_VALUE="-4.00187" BBK_DIFF_A="0.22469"/>
      <bbk:Obs TIME_PERIOD="1999-06-16" OBS_VALUE="-4.22656" BBK_DIFF_A="-0.19135"/>
      <bbk:Obs TIME_PERIOD="1999-06-15" OBS_VALUE="-4.03521" BBK_DIFF_A="0.26327"/>
      <bbk:Obs TIME_PERIOD="1999-06-14" OBS_VALUE="-4.29848" BBK_DIFF_A="-0.01439"/>
      <bbk:Obs TIME_PERIOD="1999-06-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-06-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-06-11" OBS_VALUE="-4.28409" BBK_DIFF_A="-0.13184"/>
      <bbk:Obs TIME_PERIOD="1999-06-10" OBS_VALUE="-4.15225" BBK_DIFF_A="-0.10182"/>
      <bbk:Obs TIME_PERIOD="1999-06-09" OBS_VALUE="-4.05043" BBK_DIFF_A="-0.02325"/>
      <bbk:Obs TIME_PERIOD="1999-06-08" OBS_VALUE="-4.02718" BBK_DIFF_A="0.22637"/>
      <bbk:Obs TIME_PERIOD="1999-06-07" OBS_VALUE="-4.25355" BBK_DIFF_A="-0.14026"/>
      <bbk:Obs TIME_PERIOD="1999-06-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-06-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-06-04" OBS_VALUE="-4.11329" BBK_DIFF_A="-0.08045"/>
      <bbk:Obs TIME_PERIOD="1999-06-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-06-02" OBS_VALUE="-4.03284" BBK_DIFF_A="0.0889"/>
      <bbk:Obs TIME_PERIOD="1999-06-01" OBS_VALUE="-4.12174" BBK_DIFF_A="-0.21344"/>
      <bbk:Obs TIME_PERIOD="1999-05-31" OBS_VALUE="-3.9083" BBK_DIFF_A="1.8E-4"/>
      <bbk:Obs TIME_PERIOD="1999-05-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-05-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-05-28" OBS_VALUE="-3.90848" BBK_DIFF_A="0.19023"/>
      <bbk:Obs TIME_PERIOD="1999-05-27" OBS_VALUE="-4.09871" BBK_DIFF_A="-0.25709"/>
      <bbk:Obs TIME_PERIOD="1999-05-26" OBS_VALUE="-3.84162" BBK_DIFF_A="0.05058"/>
      <bbk:Obs TIME_PERIOD="1999-05-25" OBS_VALUE="-3.8922" BBK_DIFF_A="0.06137"/>
      <bbk:Obs TIME_PERIOD="1999-05-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-05-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-05-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-05-21" OBS_VALUE="-3.95357" BBK_DIFF_A="0.12484"/>
      <bbk:Obs TIME_PERIOD="1999-05-20" OBS_VALUE="-4.07841" BBK_DIFF_A="0.00828"/>
      <bbk:Obs TIME_PERIOD="1999-05-19" OBS_VALUE="-4.08669" BBK_DIFF_A="-4.16854"/>
      <bbk:Obs TIME_PERIOD="1999-05-18" OBS_VALUE="0.08185" BBK_DIFF_A="3.57237"/>
      <bbk:Obs TIME_PERIOD="1999-05-17" OBS_VALUE="-3.49052" BBK_DIFF_A="0.47501"/>
      <bbk:Obs TIME_PERIOD="1999-05-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-05-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-05-14" OBS_VALUE="-3.96553" BBK_DIFF_A="-0.14181"/>
      <bbk:Obs TIME_PERIOD="1999-05-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-05-12" OBS_VALUE="-3.82372" BBK_DIFF_A="-0.07743"/>
      <bbk:Obs TIME_PERIOD="1999-05-11" OBS_VALUE="-3.74629" BBK_DIFF_A="1.3132"/>
      <bbk:Obs TIME_PERIOD="1999-05-10" OBS_VALUE="-5.05949" BBK_DIFF_A="-1.32333"/>
      <bbk:Obs TIME_PERIOD="1999-05-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-05-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-05-07" OBS_VALUE="-3.73616" BBK_DIFF_A="0.04421"/>
      <bbk:Obs TIME_PERIOD="1999-05-06" OBS_VALUE="-3.78037" BBK_DIFF_A="0.01085"/>
      <bbk:Obs TIME_PERIOD="1999-05-05" OBS_VALUE="-3.79122" BBK_DIFF_A="-0.0696"/>
      <bbk:Obs TIME_PERIOD="1999-05-04" OBS_VALUE="-3.72162" BBK_DIFF_A="-0.03463"/>
      <bbk:Obs TIME_PERIOD="1999-05-03" OBS_VALUE="-3.68699" BBK_DIFF_A="-0.15608"/>
      <bbk:Obs TIME_PERIOD="1999-05-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-05-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-04-30" OBS_VALUE="-3.53091" BBK_DIFF_A="0.06027"/>
      <bbk:Obs TIME_PERIOD="1999-04-29" OBS_VALUE="-3.59118" BBK_DIFF_A="0.09448"/>
      <bbk:Obs TIME_PERIOD="1999-04-28" OBS_VALUE="-3.68566" BBK_DIFF_A="0.07427"/>
      <bbk:Obs TIME_PERIOD="1999-04-27" OBS_VALUE="-3.75993" BBK_DIFF_A="-0.02567"/>
      <bbk:Obs TIME_PERIOD="1999-04-26" OBS_VALUE="-3.73426" BBK_DIFF_A="-0.06373"/>
      <bbk:Obs TIME_PERIOD="1999-04-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-04-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-04-23" OBS_VALUE="-3.67053" BBK_DIFF_A="0.00292"/>
      <bbk:Obs TIME_PERIOD="1999-04-22" OBS_VALUE="-3.67345" BBK_DIFF_A="-0.07288"/>
      <bbk:Obs TIME_PERIOD="1999-04-21" OBS_VALUE="-3.60057" BBK_DIFF_A="0.37226"/>
      <bbk:Obs TIME_PERIOD="1999-04-20" OBS_VALUE="-3.97283" BBK_DIFF_A="-0.05049"/>
      <bbk:Obs TIME_PERIOD="1999-04-19" OBS_VALUE="-3.92234" BBK_DIFF_A="-2.15206"/>
      <bbk:Obs TIME_PERIOD="1999-04-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-04-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-04-16" OBS_VALUE="-1.77028" BBK_DIFF_A="-2.30073"/>
      <bbk:Obs TIME_PERIOD="1999-04-15" OBS_VALUE="0.53045" BBK_DIFF_A="4.21688"/>
      <bbk:Obs TIME_PERIOD="1999-04-14" OBS_VALUE="-3.68643" BBK_DIFF_A="0.44654"/>
      <bbk:Obs TIME_PERIOD="1999-04-13" OBS_VALUE="-4.13297" BBK_DIFF_A="-0.20659"/>
      <bbk:Obs TIME_PERIOD="1999-04-12" OBS_VALUE="-3.92638" BBK_DIFF_A="-0.41531"/>
      <bbk:Obs TIME_PERIOD="1999-04-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-04-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-04-09" OBS_VALUE="-3.51107" BBK_DIFF_A="0.48365"/>
      <bbk:Obs TIME_PERIOD="1999-04-08" OBS_VALUE="-3.99472" BBK_DIFF_A="-0.58469"/>
      <bbk:Obs TIME_PERIOD="1999-04-07" OBS_VALUE="-3.41003" BBK_DIFF_A="0.04909"/>
      <bbk:Obs TIME_PERIOD="1999-04-06" OBS_VALUE="-3.45912" BBK_DIFF_A="1.02802"/>
      <bbk:Obs TIME_PERIOD="1999-04-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-04-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-04-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-04-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-04-01" OBS_VALUE="-4.48714" BBK_DIFF_A="-0.89576"/>
      <bbk:Obs TIME_PERIOD="1999-03-31" OBS_VALUE="-3.59138" BBK_DIFF_A="-0.0952"/>
      <bbk:Obs TIME_PERIOD="1999-03-30" OBS_VALUE="-3.49618" BBK_DIFF_A="0.04041"/>
      <bbk:Obs TIME_PERIOD="1999-03-29" OBS_VALUE="-3.53659" BBK_DIFF_A="0.01287"/>
      <bbk:Obs TIME_PERIOD="1999-03-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-03-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-03-26" OBS_VALUE="-3.54946" BBK_DIFF_A="0.34184"/>
      <bbk:Obs TIME_PERIOD="1999-03-25" OBS_VALUE="-3.8913" BBK_DIFF_A="-0.39024"/>
      <bbk:Obs TIME_PERIOD="1999-03-24" OBS_VALUE="-3.50106" BBK_DIFF_A="0.40977"/>
      <bbk:Obs TIME_PERIOD="1999-03-23" OBS_VALUE="-3.91083" BBK_DIFF_A="-0.34278"/>
      <bbk:Obs TIME_PERIOD="1999-03-22" OBS_VALUE="-3.56805" BBK_DIFF_A="0.43128"/>
      <bbk:Obs TIME_PERIOD="1999-03-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-03-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-03-19" OBS_VALUE="-3.99933" BBK_DIFF_A="-0.33345"/>
      <bbk:Obs TIME_PERIOD="1999-03-18" OBS_VALUE="-3.66588" BBK_DIFF_A="0.00255"/>
      <bbk:Obs TIME_PERIOD="1999-03-17" OBS_VALUE="-3.66843" BBK_DIFF_A="0.34853"/>
      <bbk:Obs TIME_PERIOD="1999-03-16" OBS_VALUE="-4.01696" BBK_DIFF_A="-0.36592"/>
      <bbk:Obs TIME_PERIOD="1999-03-15" OBS_VALUE="-3.65104" BBK_DIFF_A="-0.20699"/>
      <bbk:Obs TIME_PERIOD="1999-03-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-03-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-03-12" OBS_VALUE="-3.44405" BBK_DIFF_A="0.08784"/>
      <bbk:Obs TIME_PERIOD="1999-03-11" OBS_VALUE="-3.53189" BBK_DIFF_A="0.10632"/>
      <bbk:Obs TIME_PERIOD="1999-03-10" OBS_VALUE="-3.63821" BBK_DIFF_A="-0.01039"/>
      <bbk:Obs TIME_PERIOD="1999-03-09" OBS_VALUE="-3.62782" BBK_DIFF_A="-4.7249"/>
      <bbk:Obs TIME_PERIOD="1999-03-08" OBS_VALUE="1.09708" BBK_DIFF_A="4.90408"/>
      <bbk:Obs TIME_PERIOD="1999-03-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-03-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-03-05" OBS_VALUE="-3.807" BBK_DIFF_A="0.00781"/>
      <bbk:Obs TIME_PERIOD="1999-03-04" OBS_VALUE="-3.81481" BBK_DIFF_A="-0.03023"/>
      <bbk:Obs TIME_PERIOD="1999-03-03" OBS_VALUE="-3.78458" BBK_DIFF_A="-0.05399"/>
      <bbk:Obs TIME_PERIOD="1999-03-02" OBS_VALUE="-3.73059" BBK_DIFF_A="-0.05316"/>
      <bbk:Obs TIME_PERIOD="1999-03-01" OBS_VALUE="-3.67743" BBK_DIFF_A="-0.4237"/>
      <bbk:Obs TIME_PERIOD="1999-02-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-02-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-02-26" OBS_VALUE="-3.25373" BBK_DIFF_A="0.44595"/>
      <bbk:Obs TIME_PERIOD="1999-02-25" OBS_VALUE="-3.69968" BBK_DIFF_A="-0.19609"/>
      <bbk:Obs TIME_PERIOD="1999-02-24" OBS_VALUE="-3.50359" BBK_DIFF_A="0.03103"/>
      <bbk:Obs TIME_PERIOD="1999-02-23" OBS_VALUE="-3.53462" BBK_DIFF_A="-0.03749"/>
      <bbk:Obs TIME_PERIOD="1999-02-22" OBS_VALUE="-3.49713" BBK_DIFF_A="-0.08672"/>
      <bbk:Obs TIME_PERIOD="1999-02-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-02-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-02-19" OBS_VALUE="-3.41041" BBK_DIFF_A="0.10396"/>
      <bbk:Obs TIME_PERIOD="1999-02-18" OBS_VALUE="-3.51437" BBK_DIFF_A="0.08745"/>
      <bbk:Obs TIME_PERIOD="1999-02-17" OBS_VALUE="-3.60182" BBK_DIFF_A="-0.23493"/>
      <bbk:Obs TIME_PERIOD="1999-02-16" OBS_VALUE="-3.36689" BBK_DIFF_A="0.12794"/>
      <bbk:Obs TIME_PERIOD="1999-02-15" OBS_VALUE="-3.49483" BBK_DIFF_A="0.06844"/>
      <bbk:Obs TIME_PERIOD="1999-02-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-02-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-02-12" OBS_VALUE="-3.56327" BBK_DIFF_A="-0.60564"/>
      <bbk:Obs TIME_PERIOD="1999-02-11" OBS_VALUE="-2.95763" BBK_DIFF_A="0.60249"/>
      <bbk:Obs TIME_PERIOD="1999-02-10" OBS_VALUE="-3.56012" BBK_DIFF_A="-0.12074"/>
      <bbk:Obs TIME_PERIOD="1999-02-09" OBS_VALUE="-3.43938" BBK_DIFF_A="0.30562"/>
      <bbk:Obs TIME_PERIOD="1999-02-08" OBS_VALUE="-3.745" BBK_DIFF_A="-0.15785"/>
      <bbk:Obs TIME_PERIOD="1999-02-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-02-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-02-05" OBS_VALUE="-3.58715" BBK_DIFF_A="-0.27157"/>
      <bbk:Obs TIME_PERIOD="1999-02-04" OBS_VALUE="-3.31558" BBK_DIFF_A="-0.01133"/>
      <bbk:Obs TIME_PERIOD="1999-02-03" OBS_VALUE="-3.30425" BBK_DIFF_A="0.16993"/>
      <bbk:Obs TIME_PERIOD="1999-02-02" OBS_VALUE="-3.47418" BBK_DIFF_A="0.00158"/>
      <bbk:Obs TIME_PERIOD="1999-02-01" OBS_VALUE="-3.47576" BBK_DIFF_A="-0.38484"/>
      <bbk:Obs TIME_PERIOD="1999-01-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-01-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-01-29" OBS_VALUE="-3.09092" BBK_DIFF_A="-0.06245"/>
      <bbk:Obs TIME_PERIOD="1999-01-28" OBS_VALUE="-3.02847" BBK_DIFF_A="-0.00572"/>
      <bbk:Obs TIME_PERIOD="1999-01-27" OBS_VALUE="-3.02275" BBK_DIFF_A="-2.03942"/>
      <bbk:Obs TIME_PERIOD="1999-01-26" OBS_VALUE="-0.98333" BBK_DIFF_A="2.03311"/>
      <bbk:Obs TIME_PERIOD="1999-01-25" OBS_VALUE="-3.01644" BBK_DIFF_A="-0.00699"/>
      <bbk:Obs TIME_PERIOD="1999-01-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-01-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-01-22" OBS_VALUE="-3.00945" BBK_DIFF_A="0.04455"/>
      <bbk:Obs TIME_PERIOD="1999-01-21" OBS_VALUE="-3.054" BBK_DIFF_A="0.26475"/>
      <bbk:Obs TIME_PERIOD="1999-01-20" OBS_VALUE="-3.31875" BBK_DIFF_A="-0.09758"/>
      <bbk:Obs TIME_PERIOD="1999-01-19" OBS_VALUE="-3.22117" BBK_DIFF_A="0.04818"/>
      <bbk:Obs TIME_PERIOD="1999-01-18" OBS_VALUE="-3.26935" BBK_DIFF_A="0.00989"/>
      <bbk:Obs TIME_PERIOD="1999-01-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-01-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-01-15" OBS_VALUE="-3.27924" BBK_DIFF_A="0.00596"/>
      <bbk:Obs TIME_PERIOD="1999-01-14" OBS_VALUE="-3.2852" BBK_DIFF_A="-0.25967"/>
      <bbk:Obs TIME_PERIOD="1999-01-13" OBS_VALUE="-3.02553" BBK_DIFF_A="-0.04495"/>
      <bbk:Obs TIME_PERIOD="1999-01-12" OBS_VALUE="-2.98058" BBK_DIFF_A="-0.18895"/>
      <bbk:Obs TIME_PERIOD="1999-01-11" OBS_VALUE="-2.79163" BBK_DIFF_A="0.0241"/>
      <bbk:Obs TIME_PERIOD="1999-01-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-01-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-01-08" OBS_VALUE="-2.81573" BBK_DIFF_A="-0.21041"/>
      <bbk:Obs TIME_PERIOD="1999-01-07" OBS_VALUE="-2.60532" BBK_DIFF_A="0.07363"/>
      <bbk:Obs TIME_PERIOD="1999-01-06" OBS_VALUE="-2.67895" BBK_DIFF_A="0.10869"/>
      <bbk:Obs TIME_PERIOD="1999-01-05" OBS_VALUE="-2.78764" BBK_DIFF_A="0.34607"/>
      <bbk:Obs TIME_PERIOD="1999-01-04" OBS_VALUE="-3.13371" BBK_DIFF_A="1.65243"/>
      <bbk:Obs TIME_PERIOD="1999-01-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-01-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1999-01-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-12-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-12-30" OBS_VALUE="-4.78614" BBK_DIFF_A="-1.6711"/>
      <bbk:Obs TIME_PERIOD="1998-12-29" OBS_VALUE="-3.11504" BBK_DIFF_A="-0.12162"/>
      <bbk:Obs TIME_PERIOD="1998-12-28" OBS_VALUE="-2.99342" BBK_DIFF_A="0.02409"/>
      <bbk:Obs TIME_PERIOD="1998-12-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-12-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-12-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-12-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-12-23" OBS_VALUE="-3.01751" BBK_DIFF_A="-0.01585"/>
      <bbk:Obs TIME_PERIOD="1998-12-22" OBS_VALUE="-3.00166" BBK_DIFF_A="-0.19534"/>
      <bbk:Obs TIME_PERIOD="1998-12-21" OBS_VALUE="-2.80632" BBK_DIFF_A="0.13871"/>
      <bbk:Obs TIME_PERIOD="1998-12-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-12-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-12-18" OBS_VALUE="-2.94503" BBK_DIFF_A="-0.07217"/>
      <bbk:Obs TIME_PERIOD="1998-12-17" OBS_VALUE="-2.87286" BBK_DIFF_A="-0.12812"/>
      <bbk:Obs TIME_PERIOD="1998-12-16" OBS_VALUE="-2.74474" BBK_DIFF_A="0.00196"/>
      <bbk:Obs TIME_PERIOD="1998-12-15" OBS_VALUE="-2.7467" BBK_DIFF_A="0.0109"/>
      <bbk:Obs TIME_PERIOD="1998-12-14" OBS_VALUE="-2.7576" BBK_DIFF_A="-0.10317"/>
      <bbk:Obs TIME_PERIOD="1998-12-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-12-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-12-11" OBS_VALUE="-2.65443" BBK_DIFF_A="0.18832"/>
      <bbk:Obs TIME_PERIOD="1998-12-10" OBS_VALUE="-2.84275" BBK_DIFF_A="0.01359"/>
      <bbk:Obs TIME_PERIOD="1998-12-09" OBS_VALUE="-2.85634" BBK_DIFF_A="0.25654"/>
      <bbk:Obs TIME_PERIOD="1998-12-08" OBS_VALUE="-3.11288" BBK_DIFF_A="0.04361"/>
      <bbk:Obs TIME_PERIOD="1998-12-07" OBS_VALUE="-3.15649" BBK_DIFF_A="-0.15328"/>
      <bbk:Obs TIME_PERIOD="1998-12-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-12-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-12-04" OBS_VALUE="-3.00321" BBK_DIFF_A="0.19049"/>
      <bbk:Obs TIME_PERIOD="1998-12-03" OBS_VALUE="-3.1937" BBK_DIFF_A="0.25551"/>
      <bbk:Obs TIME_PERIOD="1998-12-02" OBS_VALUE="-3.44921" BBK_DIFF_A="-0.24246"/>
      <bbk:Obs TIME_PERIOD="1998-12-01" OBS_VALUE="-3.20675" BBK_DIFF_A="-0.30317"/>
      <bbk:Obs TIME_PERIOD="1998-11-30" OBS_VALUE="-2.90358" BBK_DIFF_A="0.42592"/>
      <bbk:Obs TIME_PERIOD="1998-11-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-11-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-11-27" OBS_VALUE="-3.3295" BBK_DIFF_A="-0.1022"/>
      <bbk:Obs TIME_PERIOD="1998-11-26" OBS_VALUE="-3.2273" BBK_DIFF_A="0.14995"/>
      <bbk:Obs TIME_PERIOD="1998-11-25" OBS_VALUE="-3.37725" BBK_DIFF_A="0.16228"/>
      <bbk:Obs TIME_PERIOD="1998-11-24" OBS_VALUE="-3.53953" BBK_DIFF_A="0.16038"/>
      <bbk:Obs TIME_PERIOD="1998-11-23" OBS_VALUE="-3.69991" BBK_DIFF_A="0.0608"/>
      <bbk:Obs TIME_PERIOD="1998-11-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-11-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-11-20" OBS_VALUE="-3.76071" BBK_DIFF_A="0.23813"/>
      <bbk:Obs TIME_PERIOD="1998-11-19" OBS_VALUE="-3.99884" BBK_DIFF_A="0.05253"/>
      <bbk:Obs TIME_PERIOD="1998-11-18" OBS_VALUE="-4.05137" BBK_DIFF_A="0.28099"/>
      <bbk:Obs TIME_PERIOD="1998-11-17" OBS_VALUE="-4.33236" BBK_DIFF_A="0.11133"/>
      <bbk:Obs TIME_PERIOD="1998-11-16" OBS_VALUE="-4.44369" BBK_DIFF_A="0.22315"/>
      <bbk:Obs TIME_PERIOD="1998-11-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-11-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-11-13" OBS_VALUE="-4.66684" BBK_DIFF_A="-0.02053"/>
      <bbk:Obs TIME_PERIOD="1998-11-12" OBS_VALUE="-4.64631" BBK_DIFF_A="-0.25745"/>
      <bbk:Obs TIME_PERIOD="1998-11-11" OBS_VALUE="-4.38886" BBK_DIFF_A="0.142"/>
      <bbk:Obs TIME_PERIOD="1998-11-10" OBS_VALUE="-4.53086" BBK_DIFF_A="-0.44563"/>
      <bbk:Obs TIME_PERIOD="1998-11-09" OBS_VALUE="-4.08523" BBK_DIFF_A="0.26491"/>
      <bbk:Obs TIME_PERIOD="1998-11-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-11-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-11-06" OBS_VALUE="-4.35014" BBK_DIFF_A="0.3142"/>
      <bbk:Obs TIME_PERIOD="1998-11-05" OBS_VALUE="-4.66434" BBK_DIFF_A="-0.38105"/>
      <bbk:Obs TIME_PERIOD="1998-11-04" OBS_VALUE="-4.28329" BBK_DIFF_A="0.17435"/>
      <bbk:Obs TIME_PERIOD="1998-11-03" OBS_VALUE="-4.45764" BBK_DIFF_A="0.21963"/>
      <bbk:Obs TIME_PERIOD="1998-11-02" OBS_VALUE="-4.67727" BBK_DIFF_A="-0.03321"/>
      <bbk:Obs TIME_PERIOD="1998-11-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-10-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-10-30" OBS_VALUE="-4.64406" BBK_DIFF_A="-0.11523"/>
      <bbk:Obs TIME_PERIOD="1998-10-29" OBS_VALUE="-4.52883" BBK_DIFF_A="0.10279"/>
      <bbk:Obs TIME_PERIOD="1998-10-28" OBS_VALUE="-4.63162" BBK_DIFF_A="-0.06928"/>
      <bbk:Obs TIME_PERIOD="1998-10-27" OBS_VALUE="-4.56234" BBK_DIFF_A="-0.14264"/>
      <bbk:Obs TIME_PERIOD="1998-10-26" OBS_VALUE="-4.4197" BBK_DIFF_A="-0.20976"/>
      <bbk:Obs TIME_PERIOD="1998-10-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-10-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-10-23" OBS_VALUE="-4.20994" BBK_DIFF_A="0.08953"/>
      <bbk:Obs TIME_PERIOD="1998-10-22" OBS_VALUE="-4.29947" BBK_DIFF_A="-0.51154"/>
      <bbk:Obs TIME_PERIOD="1998-10-21" OBS_VALUE="-3.78793" BBK_DIFF_A="-4.28013"/>
      <bbk:Obs TIME_PERIOD="1998-10-20" OBS_VALUE="0.4922" BBK_DIFF_A="4.11811"/>
      <bbk:Obs TIME_PERIOD="1998-10-19" OBS_VALUE="-3.62591" BBK_DIFF_A="0.01086"/>
      <bbk:Obs TIME_PERIOD="1998-10-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-10-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-10-16" OBS_VALUE="-3.63677" BBK_DIFF_A="-0.1883"/>
      <bbk:Obs TIME_PERIOD="1998-10-15" OBS_VALUE="-3.44847" BBK_DIFF_A="-0.24269"/>
      <bbk:Obs TIME_PERIOD="1998-10-14" OBS_VALUE="-3.20578" BBK_DIFF_A="-0.02757"/>
      <bbk:Obs TIME_PERIOD="1998-10-13" OBS_VALUE="-3.17821" BBK_DIFF_A="1.53875"/>
      <bbk:Obs TIME_PERIOD="1998-10-12" OBS_VALUE="-4.71696" BBK_DIFF_A="-1.80057"/>
      <bbk:Obs TIME_PERIOD="1998-10-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-10-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-10-09" OBS_VALUE="-2.91639" BBK_DIFF_A="1.31905"/>
      <bbk:Obs TIME_PERIOD="1998-10-08" OBS_VALUE="-4.23544" BBK_DIFF_A="-0.31168"/>
      <bbk:Obs TIME_PERIOD="1998-10-07" OBS_VALUE="-3.92376" BBK_DIFF_A="0.15002"/>
      <bbk:Obs TIME_PERIOD="1998-10-06" OBS_VALUE="-4.07378" BBK_DIFF_A="-0.36343"/>
      <bbk:Obs TIME_PERIOD="1998-10-05" OBS_VALUE="-3.71035" BBK_DIFF_A="-0.36642"/>
      <bbk:Obs TIME_PERIOD="1998-10-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-10-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-10-02" OBS_VALUE="-3.34393" BBK_DIFF_A="-0.09422"/>
      <bbk:Obs TIME_PERIOD="1998-10-01" OBS_VALUE="-3.24971" BBK_DIFF_A="0.09744"/>
      <bbk:Obs TIME_PERIOD="1998-09-30" OBS_VALUE="-3.34715" BBK_DIFF_A="0.39987"/>
      <bbk:Obs TIME_PERIOD="1998-09-29" OBS_VALUE="-3.74702" BBK_DIFF_A="-0.0444"/>
      <bbk:Obs TIME_PERIOD="1998-09-28" OBS_VALUE="-3.70262" BBK_DIFF_A="-0.49982"/>
      <bbk:Obs TIME_PERIOD="1998-09-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-09-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-09-25" OBS_VALUE="-3.2028" BBK_DIFF_A="0.6985"/>
      <bbk:Obs TIME_PERIOD="1998-09-24" OBS_VALUE="-3.9013" BBK_DIFF_A="-0.87777"/>
      <bbk:Obs TIME_PERIOD="1998-09-23" OBS_VALUE="-3.02353" BBK_DIFF_A="-0.05283"/>
      <bbk:Obs TIME_PERIOD="1998-09-22" OBS_VALUE="-2.9707" BBK_DIFF_A="-0.16149"/>
      <bbk:Obs TIME_PERIOD="1998-09-21" OBS_VALUE="-2.80921" BBK_DIFF_A="0.65209"/>
      <bbk:Obs TIME_PERIOD="1998-09-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-09-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-09-18" OBS_VALUE="-3.4613" BBK_DIFF_A="-1.01949"/>
      <bbk:Obs TIME_PERIOD="1998-09-17" OBS_VALUE="-2.44181" BBK_DIFF_A="0.5703"/>
      <bbk:Obs TIME_PERIOD="1998-09-16" OBS_VALUE="-3.01211" BBK_DIFF_A="-0.09918"/>
      <bbk:Obs TIME_PERIOD="1998-09-15" OBS_VALUE="-2.91293" BBK_DIFF_A="0.18252"/>
      <bbk:Obs TIME_PERIOD="1998-09-14" OBS_VALUE="-3.09545" BBK_DIFF_A="-0.6538"/>
      <bbk:Obs TIME_PERIOD="1998-09-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-09-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-09-11" OBS_VALUE="-2.44165" BBK_DIFF_A="0.24964"/>
      <bbk:Obs TIME_PERIOD="1998-09-10" OBS_VALUE="-2.69129" BBK_DIFF_A="-0.74661"/>
      <bbk:Obs TIME_PERIOD="1998-09-09" OBS_VALUE="-1.94468" BBK_DIFF_A="0.64679"/>
      <bbk:Obs TIME_PERIOD="1998-09-08" OBS_VALUE="-2.59147" BBK_DIFF_A="-0.10656"/>
      <bbk:Obs TIME_PERIOD="1998-09-07" OBS_VALUE="-2.48491" BBK_DIFF_A="0.10526"/>
      <bbk:Obs TIME_PERIOD="1998-09-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-09-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-09-04" OBS_VALUE="-2.59017" BBK_DIFF_A="-0.0637"/>
      <bbk:Obs TIME_PERIOD="1998-09-03" OBS_VALUE="-2.52647" BBK_DIFF_A="0.118"/>
      <bbk:Obs TIME_PERIOD="1998-09-02" OBS_VALUE="-2.64447" BBK_DIFF_A="0.23195"/>
      <bbk:Obs TIME_PERIOD="1998-09-01" OBS_VALUE="-2.87642" BBK_DIFF_A="-3.4052"/>
      <bbk:Obs TIME_PERIOD="1998-08-31" OBS_VALUE="0.52878" BBK_DIFF_A="3.24362"/>
      <bbk:Obs TIME_PERIOD="1998-08-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-08-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-08-28" OBS_VALUE="-2.71484" BBK_DIFF_A="0.41837"/>
      <bbk:Obs TIME_PERIOD="1998-08-27" OBS_VALUE="-3.13321" BBK_DIFF_A="-4.4836"/>
      <bbk:Obs TIME_PERIOD="1998-08-26" OBS_VALUE="1.35039" BBK_DIFF_A="4.08814"/>
      <bbk:Obs TIME_PERIOD="1998-08-25" OBS_VALUE="-2.73775" BBK_DIFF_A="0.1507"/>
      <bbk:Obs TIME_PERIOD="1998-08-24" OBS_VALUE="-2.88845" BBK_DIFF_A="-0.3915"/>
      <bbk:Obs TIME_PERIOD="1998-08-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-08-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-08-21" OBS_VALUE="-2.49695" BBK_DIFF_A="0.31167"/>
      <bbk:Obs TIME_PERIOD="1998-08-20" OBS_VALUE="-2.80862" BBK_DIFF_A="-0.86416"/>
      <bbk:Obs TIME_PERIOD="1998-08-19" OBS_VALUE="-1.94446" BBK_DIFF_A="0.60372"/>
      <bbk:Obs TIME_PERIOD="1998-08-18" OBS_VALUE="-2.54818" BBK_DIFF_A="-0.10964"/>
      <bbk:Obs TIME_PERIOD="1998-08-17" OBS_VALUE="-2.43854" BBK_DIFF_A="-0.15957"/>
      <bbk:Obs TIME_PERIOD="1998-08-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-08-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-08-14" OBS_VALUE="-2.27897" BBK_DIFF_A="0.29564"/>
      <bbk:Obs TIME_PERIOD="1998-08-13" OBS_VALUE="-2.57461" BBK_DIFF_A="0.2427"/>
      <bbk:Obs TIME_PERIOD="1998-08-12" OBS_VALUE="-2.81731" BBK_DIFF_A="-0.63694"/>
      <bbk:Obs TIME_PERIOD="1998-08-11" OBS_VALUE="-2.18037" BBK_DIFF_A="0.33247"/>
      <bbk:Obs TIME_PERIOD="1998-08-10" OBS_VALUE="-2.51284" BBK_DIFF_A="0.1186"/>
      <bbk:Obs TIME_PERIOD="1998-08-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-08-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-08-07" OBS_VALUE="-2.63144" BBK_DIFF_A="-0.08389"/>
      <bbk:Obs TIME_PERIOD="1998-08-06" OBS_VALUE="-2.54755" BBK_DIFF_A="0.04852"/>
      <bbk:Obs TIME_PERIOD="1998-08-05" OBS_VALUE="-2.59607" BBK_DIFF_A="0.17911"/>
      <bbk:Obs TIME_PERIOD="1998-08-04" OBS_VALUE="-2.77518" BBK_DIFF_A="0.56079"/>
      <bbk:Obs TIME_PERIOD="1998-08-03" OBS_VALUE="-3.33597" BBK_DIFF_A="-0.5605"/>
      <bbk:Obs TIME_PERIOD="1998-08-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-08-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-07-31" OBS_VALUE="-2.77547" BBK_DIFF_A="3.7E-4"/>
      <bbk:Obs TIME_PERIOD="1998-07-30" OBS_VALUE="-2.77584" BBK_DIFF_A="-0.1505"/>
      <bbk:Obs TIME_PERIOD="1998-07-29" OBS_VALUE="-2.62534" BBK_DIFF_A="0.38043"/>
      <bbk:Obs TIME_PERIOD="1998-07-28" OBS_VALUE="-3.00577" BBK_DIFF_A="-0.30333"/>
      <bbk:Obs TIME_PERIOD="1998-07-27" OBS_VALUE="-2.70244" BBK_DIFF_A="0.04856"/>
      <bbk:Obs TIME_PERIOD="1998-07-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-07-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-07-24" OBS_VALUE="-2.751" BBK_DIFF_A="0.17328"/>
      <bbk:Obs TIME_PERIOD="1998-07-23" OBS_VALUE="-2.92428" BBK_DIFF_A="-0.28853"/>
      <bbk:Obs TIME_PERIOD="1998-07-22" OBS_VALUE="-2.63575" BBK_DIFF_A="0.08902"/>
      <bbk:Obs TIME_PERIOD="1998-07-21" OBS_VALUE="-2.72477" BBK_DIFF_A="0.16611"/>
      <bbk:Obs TIME_PERIOD="1998-07-20" OBS_VALUE="-2.89088" BBK_DIFF_A="-0.11999"/>
      <bbk:Obs TIME_PERIOD="1998-07-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-07-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-07-17" OBS_VALUE="-2.77089" BBK_DIFF_A="0.06103"/>
      <bbk:Obs TIME_PERIOD="1998-07-16" OBS_VALUE="-2.83192" BBK_DIFF_A="0.1195"/>
      <bbk:Obs TIME_PERIOD="1998-07-15" OBS_VALUE="-2.95142" BBK_DIFF_A="-0.03839"/>
      <bbk:Obs TIME_PERIOD="1998-07-14" OBS_VALUE="-2.91303" BBK_DIFF_A="-0.25139"/>
      <bbk:Obs TIME_PERIOD="1998-07-13" OBS_VALUE="-2.66164" BBK_DIFF_A="0.01575"/>
      <bbk:Obs TIME_PERIOD="1998-07-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-07-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-07-10" OBS_VALUE="-2.67739" BBK_DIFF_A="-0.05953"/>
      <bbk:Obs TIME_PERIOD="1998-07-09" OBS_VALUE="-2.61786" BBK_DIFF_A="-7.85495"/>
      <bbk:Obs TIME_PERIOD="1998-07-08" OBS_VALUE="5.23709" BBK_DIFF_A="-0.20378"/>
      <bbk:Obs TIME_PERIOD="1998-07-07" OBS_VALUE="5.44087" BBK_DIFF_A="-3.6782"/>
      <bbk:Obs TIME_PERIOD="1998-07-06" OBS_VALUE="9.11907" BBK_DIFF_A="11.81256"/>
      <bbk:Obs TIME_PERIOD="1998-07-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-07-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-07-03" OBS_VALUE="-2.69349" BBK_DIFF_A="-11.22594"/>
      <bbk:Obs TIME_PERIOD="1998-07-02" OBS_VALUE="8.53245" BBK_DIFF_A="11.31335"/>
      <bbk:Obs TIME_PERIOD="1998-07-01" OBS_VALUE="-2.7809" BBK_DIFF_A="-10.22586"/>
      <bbk:Obs TIME_PERIOD="1998-06-30" OBS_VALUE="7.44496" BBK_DIFF_A="10.18372"/>
      <bbk:Obs TIME_PERIOD="1998-06-29" OBS_VALUE="-2.73876" BBK_DIFF_A="0.02235"/>
      <bbk:Obs TIME_PERIOD="1998-06-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-06-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-06-26" OBS_VALUE="-2.76111" BBK_DIFF_A="-0.02462"/>
      <bbk:Obs TIME_PERIOD="1998-06-25" OBS_VALUE="-2.73649" BBK_DIFF_A="-0.00713"/>
      <bbk:Obs TIME_PERIOD="1998-06-24" OBS_VALUE="-2.72936" BBK_DIFF_A="-0.00209"/>
      <bbk:Obs TIME_PERIOD="1998-06-23" OBS_VALUE="-2.72727" BBK_DIFF_A="-0.0057"/>
      <bbk:Obs TIME_PERIOD="1998-06-22" OBS_VALUE="-2.72157" BBK_DIFF_A="0.07105"/>
      <bbk:Obs TIME_PERIOD="1998-06-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-06-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-06-19" OBS_VALUE="-2.79262" BBK_DIFF_A="-0.00541"/>
      <bbk:Obs TIME_PERIOD="1998-06-18" OBS_VALUE="-2.78721" BBK_DIFF_A="-0.05055"/>
      <bbk:Obs TIME_PERIOD="1998-06-17" OBS_VALUE="-2.73666" BBK_DIFF_A="-0.02987"/>
      <bbk:Obs TIME_PERIOD="1998-06-16" OBS_VALUE="-2.70679" BBK_DIFF_A="-0.01938"/>
      <bbk:Obs TIME_PERIOD="1998-06-15" OBS_VALUE="-2.68741" BBK_DIFF_A="-0.0339"/>
      <bbk:Obs TIME_PERIOD="1998-06-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-06-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-06-12" OBS_VALUE="-2.65351" BBK_DIFF_A="0.16994"/>
      <bbk:Obs TIME_PERIOD="1998-06-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-06-10" OBS_VALUE="-2.82345" BBK_DIFF_A="0.0342"/>
      <bbk:Obs TIME_PERIOD="1998-06-09" OBS_VALUE="-2.85765" BBK_DIFF_A="0.03607"/>
      <bbk:Obs TIME_PERIOD="1998-06-08" OBS_VALUE="-2.89372" BBK_DIFF_A="-0.02035"/>
      <bbk:Obs TIME_PERIOD="1998-06-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-06-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-06-05" OBS_VALUE="-2.87337" BBK_DIFF_A="-0.01501"/>
      <bbk:Obs TIME_PERIOD="1998-06-04" OBS_VALUE="-2.85836" BBK_DIFF_A="-0.08057"/>
      <bbk:Obs TIME_PERIOD="1998-06-03" OBS_VALUE="-2.77779" BBK_DIFF_A="0.9755"/>
      <bbk:Obs TIME_PERIOD="1998-06-02" OBS_VALUE="-3.75329" BBK_DIFF_A="-0.6526"/>
      <bbk:Obs TIME_PERIOD="1998-06-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-05-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-05-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-05-29" OBS_VALUE="-3.10069" BBK_DIFF_A="-0.10917"/>
      <bbk:Obs TIME_PERIOD="1998-05-28" OBS_VALUE="-2.99152" BBK_DIFF_A="-0.12548"/>
      <bbk:Obs TIME_PERIOD="1998-05-27" OBS_VALUE="-2.86604" BBK_DIFF_A="-0.0325"/>
      <bbk:Obs TIME_PERIOD="1998-05-26" OBS_VALUE="-2.83354" BBK_DIFF_A="0.1211"/>
      <bbk:Obs TIME_PERIOD="1998-05-25" OBS_VALUE="-2.95464" BBK_DIFF_A="0.02081"/>
      <bbk:Obs TIME_PERIOD="1998-05-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-05-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-05-22" OBS_VALUE="-2.97545" BBK_DIFF_A="-0.1597"/>
      <bbk:Obs TIME_PERIOD="1998-05-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-05-20" OBS_VALUE="-2.81575" BBK_DIFF_A="-0.15172"/>
      <bbk:Obs TIME_PERIOD="1998-05-19" OBS_VALUE="-2.66403" BBK_DIFF_A="0.96226"/>
      <bbk:Obs TIME_PERIOD="1998-05-18" OBS_VALUE="-3.62629" BBK_DIFF_A="-1.07277"/>
      <bbk:Obs TIME_PERIOD="1998-05-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-05-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-05-15" OBS_VALUE="-2.55352" BBK_DIFF_A="0.24664"/>
      <bbk:Obs TIME_PERIOD="1998-05-14" OBS_VALUE="-2.80016" BBK_DIFF_A="-0.30887"/>
      <bbk:Obs TIME_PERIOD="1998-05-13" OBS_VALUE="-2.49129" BBK_DIFF_A="0.03104"/>
      <bbk:Obs TIME_PERIOD="1998-05-12" OBS_VALUE="-2.52233" BBK_DIFF_A="-0.16424"/>
      <bbk:Obs TIME_PERIOD="1998-05-11" OBS_VALUE="-2.35809" BBK_DIFF_A="0.17344"/>
      <bbk:Obs TIME_PERIOD="1998-05-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-05-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-05-08" OBS_VALUE="-2.53153" BBK_DIFF_A="0.15309"/>
      <bbk:Obs TIME_PERIOD="1998-05-07" OBS_VALUE="-2.68462" BBK_DIFF_A="0.35377"/>
      <bbk:Obs TIME_PERIOD="1998-05-06" OBS_VALUE="-3.03839" BBK_DIFF_A="0.0808"/>
      <bbk:Obs TIME_PERIOD="1998-05-05" OBS_VALUE="-3.11919" BBK_DIFF_A="-0.46867"/>
      <bbk:Obs TIME_PERIOD="1998-05-04" OBS_VALUE="-2.65052" BBK_DIFF_A="0.52485"/>
      <bbk:Obs TIME_PERIOD="1998-05-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-05-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-05-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-04-30" OBS_VALUE="-3.17537" BBK_DIFF_A="0.28668"/>
      <bbk:Obs TIME_PERIOD="1998-04-29" OBS_VALUE="-3.46205" BBK_DIFF_A="0.23989"/>
      <bbk:Obs TIME_PERIOD="1998-04-28" OBS_VALUE="-3.70194" BBK_DIFF_A="-0.8896"/>
      <bbk:Obs TIME_PERIOD="1998-04-27" OBS_VALUE="-2.81234" BBK_DIFF_A="0.26496"/>
      <bbk:Obs TIME_PERIOD="1998-04-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-04-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-04-24" OBS_VALUE="-3.0773" BBK_DIFF_A="-0.49294"/>
      <bbk:Obs TIME_PERIOD="1998-04-23" OBS_VALUE="-2.58436" BBK_DIFF_A="0.27625"/>
      <bbk:Obs TIME_PERIOD="1998-04-22" OBS_VALUE="-2.86061" BBK_DIFF_A="-0.34052"/>
      <bbk:Obs TIME_PERIOD="1998-04-21" OBS_VALUE="-2.52009" BBK_DIFF_A="0.44532"/>
      <bbk:Obs TIME_PERIOD="1998-04-20" OBS_VALUE="-2.96541" BBK_DIFF_A="-0.43099"/>
      <bbk:Obs TIME_PERIOD="1998-04-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-04-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-04-17" OBS_VALUE="-2.53442" BBK_DIFF_A="0.44434"/>
      <bbk:Obs TIME_PERIOD="1998-04-16" OBS_VALUE="-2.97876" BBK_DIFF_A="0.01513"/>
      <bbk:Obs TIME_PERIOD="1998-04-15" OBS_VALUE="-2.99389" BBK_DIFF_A="-0.10998"/>
      <bbk:Obs TIME_PERIOD="1998-04-14" OBS_VALUE="-2.88391" BBK_DIFF_A="-0.02011"/>
      <bbk:Obs TIME_PERIOD="1998-04-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-04-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-04-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-04-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-04-09" OBS_VALUE="-2.8638" BBK_DIFF_A="-0.31982"/>
      <bbk:Obs TIME_PERIOD="1998-04-08" OBS_VALUE="-2.54398" BBK_DIFF_A="0.0979"/>
      <bbk:Obs TIME_PERIOD="1998-04-07" OBS_VALUE="-2.64188" BBK_DIFF_A="-0.34562"/>
      <bbk:Obs TIME_PERIOD="1998-04-06" OBS_VALUE="-2.29626" BBK_DIFF_A="0.15745"/>
      <bbk:Obs TIME_PERIOD="1998-04-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-04-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-04-03" OBS_VALUE="-2.45371" BBK_DIFF_A="0.77965"/>
      <bbk:Obs TIME_PERIOD="1998-04-02" OBS_VALUE="-3.23336" BBK_DIFF_A="-0.14604"/>
      <bbk:Obs TIME_PERIOD="1998-04-01" OBS_VALUE="-3.08732" BBK_DIFF_A="-0.17902"/>
      <bbk:Obs TIME_PERIOD="1998-03-31" OBS_VALUE="-2.9083" BBK_DIFF_A="-0.306"/>
      <bbk:Obs TIME_PERIOD="1998-03-30" OBS_VALUE="-2.6023" BBK_DIFF_A="-0.06135"/>
      <bbk:Obs TIME_PERIOD="1998-03-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-03-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-03-27" OBS_VALUE="-2.54095" BBK_DIFF_A="0.0788"/>
      <bbk:Obs TIME_PERIOD="1998-03-26" OBS_VALUE="-2.61975" BBK_DIFF_A="-0.2108"/>
      <bbk:Obs TIME_PERIOD="1998-03-25" OBS_VALUE="-2.40895" BBK_DIFF_A="0.40674"/>
      <bbk:Obs TIME_PERIOD="1998-03-24" OBS_VALUE="-2.81569" BBK_DIFF_A="-0.29798"/>
      <bbk:Obs TIME_PERIOD="1998-03-23" OBS_VALUE="-2.51771" BBK_DIFF_A="0.15354"/>
      <bbk:Obs TIME_PERIOD="1998-03-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-03-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-03-20" OBS_VALUE="-2.67125" BBK_DIFF_A="0.06579"/>
      <bbk:Obs TIME_PERIOD="1998-03-19" OBS_VALUE="-2.73704" BBK_DIFF_A="0.61627"/>
      <bbk:Obs TIME_PERIOD="1998-03-18" OBS_VALUE="-3.35331" BBK_DIFF_A="-0.61327"/>
      <bbk:Obs TIME_PERIOD="1998-03-17" OBS_VALUE="-2.74004" BBK_DIFF_A="0.05206"/>
      <bbk:Obs TIME_PERIOD="1998-03-16" OBS_VALUE="-2.7921" BBK_DIFF_A="0.50457"/>
      <bbk:Obs TIME_PERIOD="1998-03-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-03-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-03-13" OBS_VALUE="-3.29667" BBK_DIFF_A="-0.45082"/>
      <bbk:Obs TIME_PERIOD="1998-03-12" OBS_VALUE="-2.84585" BBK_DIFF_A="0.03365"/>
      <bbk:Obs TIME_PERIOD="1998-03-11" OBS_VALUE="-2.8795" BBK_DIFF_A="0.29068"/>
      <bbk:Obs TIME_PERIOD="1998-03-10" OBS_VALUE="-3.17018" BBK_DIFF_A="-0.21287"/>
      <bbk:Obs TIME_PERIOD="1998-03-09" OBS_VALUE="-2.95731" BBK_DIFF_A="0.72911"/>
      <bbk:Obs TIME_PERIOD="1998-03-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-03-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-03-06" OBS_VALUE="-3.68642" BBK_DIFF_A="-0.44546"/>
      <bbk:Obs TIME_PERIOD="1998-03-05" OBS_VALUE="-3.24096" BBK_DIFF_A="0.09371"/>
      <bbk:Obs TIME_PERIOD="1998-03-04" OBS_VALUE="-3.33467" BBK_DIFF_A="-0.17768"/>
      <bbk:Obs TIME_PERIOD="1998-03-03" OBS_VALUE="-3.15699" BBK_DIFF_A="-0.03109"/>
      <bbk:Obs TIME_PERIOD="1998-03-02" OBS_VALUE="-3.1259" BBK_DIFF_A="-0.33735"/>
      <bbk:Obs TIME_PERIOD="1998-03-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-02-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-02-27" OBS_VALUE="-2.78855" BBK_DIFF_A="0.0488"/>
      <bbk:Obs TIME_PERIOD="1998-02-26" OBS_VALUE="-2.83735" BBK_DIFF_A="0.09802"/>
      <bbk:Obs TIME_PERIOD="1998-02-25" OBS_VALUE="-2.93537" BBK_DIFF_A="-0.02301"/>
      <bbk:Obs TIME_PERIOD="1998-02-24" OBS_VALUE="-2.91236" BBK_DIFF_A="-0.06026"/>
      <bbk:Obs TIME_PERIOD="1998-02-23" OBS_VALUE="-2.8521" BBK_DIFF_A="0.75017"/>
      <bbk:Obs TIME_PERIOD="1998-02-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-02-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-02-20" OBS_VALUE="-3.60227" BBK_DIFF_A="-0.68009"/>
      <bbk:Obs TIME_PERIOD="1998-02-19" OBS_VALUE="-2.92218" BBK_DIFF_A="0.34361"/>
      <bbk:Obs TIME_PERIOD="1998-02-18" OBS_VALUE="-3.26579" BBK_DIFF_A="-0.32696"/>
      <bbk:Obs TIME_PERIOD="1998-02-17" OBS_VALUE="-2.93883" BBK_DIFF_A="0.17403"/>
      <bbk:Obs TIME_PERIOD="1998-02-16" OBS_VALUE="-3.11286" BBK_DIFF_A="-0.2047"/>
      <bbk:Obs TIME_PERIOD="1998-02-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-02-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-02-13" OBS_VALUE="-2.90816" BBK_DIFF_A="0.01598"/>
      <bbk:Obs TIME_PERIOD="1998-02-12" OBS_VALUE="-2.92414" BBK_DIFF_A="0.33847"/>
      <bbk:Obs TIME_PERIOD="1998-02-11" OBS_VALUE="-3.26261" BBK_DIFF_A="-0.25471"/>
      <bbk:Obs TIME_PERIOD="1998-02-10" OBS_VALUE="-3.0079" BBK_DIFF_A="0.70972"/>
      <bbk:Obs TIME_PERIOD="1998-02-09" OBS_VALUE="-3.71762" BBK_DIFF_A="-0.45678"/>
      <bbk:Obs TIME_PERIOD="1998-02-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-02-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-02-06" OBS_VALUE="-3.26084" BBK_DIFF_A="-0.24456"/>
      <bbk:Obs TIME_PERIOD="1998-02-05" OBS_VALUE="-3.01628" BBK_DIFF_A="0.50858"/>
      <bbk:Obs TIME_PERIOD="1998-02-04" OBS_VALUE="-3.52486" BBK_DIFF_A="0.22608"/>
      <bbk:Obs TIME_PERIOD="1998-02-03" OBS_VALUE="-3.75094" BBK_DIFF_A="-0.82565"/>
      <bbk:Obs TIME_PERIOD="1998-02-02" OBS_VALUE="-2.92529" BBK_DIFF_A="1.26919"/>
      <bbk:Obs TIME_PERIOD="1998-02-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-01-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-01-30" OBS_VALUE="-4.19448" BBK_DIFF_A="-1.20947"/>
      <bbk:Obs TIME_PERIOD="1998-01-29" OBS_VALUE="-2.98501" BBK_DIFF_A="-0.05726"/>
      <bbk:Obs TIME_PERIOD="1998-01-28" OBS_VALUE="-2.92775" BBK_DIFF_A="0.02321"/>
      <bbk:Obs TIME_PERIOD="1998-01-27" OBS_VALUE="-2.95096" BBK_DIFF_A="0.08206"/>
      <bbk:Obs TIME_PERIOD="1998-01-26" OBS_VALUE="-3.03302" BBK_DIFF_A="-0.07144"/>
      <bbk:Obs TIME_PERIOD="1998-01-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-01-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-01-23" OBS_VALUE="-2.96158" BBK_DIFF_A="0.525"/>
      <bbk:Obs TIME_PERIOD="1998-01-22" OBS_VALUE="-3.48658" BBK_DIFF_A="-0.59749"/>
      <bbk:Obs TIME_PERIOD="1998-01-21" OBS_VALUE="-2.88909" BBK_DIFF_A="-0.05526"/>
      <bbk:Obs TIME_PERIOD="1998-01-20" OBS_VALUE="-2.83383" BBK_DIFF_A="0.45588"/>
      <bbk:Obs TIME_PERIOD="1998-01-19" OBS_VALUE="-3.28971" BBK_DIFF_A="0.16401"/>
      <bbk:Obs TIME_PERIOD="1998-01-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-01-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-01-16" OBS_VALUE="-3.45372" BBK_DIFF_A="1.78719"/>
      <bbk:Obs TIME_PERIOD="1998-01-15" OBS_VALUE="-5.24091" BBK_DIFF_A="-2.3598"/>
      <bbk:Obs TIME_PERIOD="1998-01-14" OBS_VALUE="-2.88111" BBK_DIFF_A="2.42983"/>
      <bbk:Obs TIME_PERIOD="1998-01-13" OBS_VALUE="-5.31094" BBK_DIFF_A="-2.65671"/>
      <bbk:Obs TIME_PERIOD="1998-01-12" OBS_VALUE="-2.65423" BBK_DIFF_A="0.15908"/>
      <bbk:Obs TIME_PERIOD="1998-01-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-01-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-01-09" OBS_VALUE="-2.81331" BBK_DIFF_A="0.12433"/>
      <bbk:Obs TIME_PERIOD="1998-01-08" OBS_VALUE="-2.93764" BBK_DIFF_A="0.01318"/>
      <bbk:Obs TIME_PERIOD="1998-01-07" OBS_VALUE="-2.95082" BBK_DIFF_A="0.13818"/>
      <bbk:Obs TIME_PERIOD="1998-01-06" OBS_VALUE="-3.089" BBK_DIFF_A="-0.0664"/>
      <bbk:Obs TIME_PERIOD="1998-01-05" OBS_VALUE="-3.0226" BBK_DIFF_A="0.15016"/>
      <bbk:Obs TIME_PERIOD="1998-01-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-01-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1998-01-02" OBS_VALUE="-3.17276" BBK_DIFF_A="-0.05009"/>
      <bbk:Obs TIME_PERIOD="1998-01-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1997-12-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1997-12-30" OBS_VALUE="-3.12267" BBK_DIFF_A="0.13248"/>
      <bbk:Obs TIME_PERIOD="1997-12-29" OBS_VALUE="-3.25515" BBK_DIFF_A="-0.2121"/>
      <bbk:Obs TIME_PERIOD="1997-12-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1997-12-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1997-12-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1997-12-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1997-12-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1997-12-23" OBS_VALUE="-3.04305" BBK_DIFF_A="2.31365"/>
      <bbk:Obs TIME_PERIOD="1997-12-22" OBS_VALUE="-5.3567" BBK_DIFF_A="-2.307"/>
      <bbk:Obs TIME_PERIOD="1997-12-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1997-12-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1997-12-19" OBS_VALUE="-3.0497" BBK_DIFF_A="0.42248"/>
      <bbk:Obs TIME_PERIOD="1997-12-18" OBS_VALUE="-3.47218" BBK_DIFF_A="0.02819"/>
      <bbk:Obs TIME_PERIOD="1997-12-17" OBS_VALUE="-3.50037" BBK_DIFF_A="-0.74067"/>
      <bbk:Obs TIME_PERIOD="1997-12-16" OBS_VALUE="-2.7597" BBK_DIFF_A="1.01589"/>
      <bbk:Obs TIME_PERIOD="1997-12-15" OBS_VALUE="-3.77559" BBK_DIFF_A="-0.77957"/>
      <bbk:Obs TIME_PERIOD="1997-12-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1997-12-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1997-12-12" OBS_VALUE="-2.99602" BBK_DIFF_A="0.02869"/>
      <bbk:Obs TIME_PERIOD="1997-12-11" OBS_VALUE="-3.02471" BBK_DIFF_A="0.00822"/>
      <bbk:Obs TIME_PERIOD="1997-12-10" OBS_VALUE="-3.03293" BBK_DIFF_A="0.76508"/>
      <bbk:Obs TIME_PERIOD="1997-12-09" OBS_VALUE="-3.79801" BBK_DIFF_A="0.78728"/>
      <bbk:Obs TIME_PERIOD="1997-12-08" OBS_VALUE="-4.58529" BBK_DIFF_A="-1.37234"/>
      <bbk:Obs TIME_PERIOD="1997-12-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1997-12-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1997-12-05" OBS_VALUE="-3.21295" BBK_DIFF_A="0.24257"/>
      <bbk:Obs TIME_PERIOD="1997-12-04" OBS_VALUE="-3.45552" BBK_DIFF_A="0.43968"/>
      <bbk:Obs TIME_PERIOD="1997-12-03" OBS_VALUE="-3.8952" BBK_DIFF_A="-0.65812"/>
      <bbk:Obs TIME_PERIOD="1997-12-02" OBS_VALUE="-3.23708" BBK_DIFF_A="0.32019"/>
      <bbk:Obs TIME_PERIOD="1997-12-01" OBS_VALUE="-3.55727" BBK_DIFF_A="-0.31826"/>
      <bbk:Obs TIME_PERIOD="1997-11-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1997-11-29" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1997-11-28" OBS_VALUE="-3.23901" BBK_DIFF_A="0.01679"/>
      <bbk:Obs TIME_PERIOD="1997-11-27" OBS_VALUE="-3.2558" BBK_DIFF_A="1.43579"/>
      <bbk:Obs TIME_PERIOD="1997-11-26" OBS_VALUE="-4.69159" BBK_DIFF_A="0.86094"/>
      <bbk:Obs TIME_PERIOD="1997-11-25" OBS_VALUE="-5.55253" BBK_DIFF_A="-2.15571"/>
      <bbk:Obs TIME_PERIOD="1997-11-24" OBS_VALUE="-3.39682" BBK_DIFF_A="2.16037"/>
      <bbk:Obs TIME_PERIOD="1997-11-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1997-11-22" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1997-11-21" OBS_VALUE="-5.55719" BBK_DIFF_A="-2.1632"/>
      <bbk:Obs TIME_PERIOD="1997-11-20" OBS_VALUE="-3.39399" BBK_DIFF_A="1.0179"/>
      <bbk:Obs TIME_PERIOD="1997-11-19" OBS_VALUE="-4.41189" BBK_DIFF_A="0.12278"/>
      <bbk:Obs TIME_PERIOD="1997-11-18" OBS_VALUE="-4.53467" BBK_DIFF_A="-0.62068"/>
      <bbk:Obs TIME_PERIOD="1997-11-17" OBS_VALUE="-3.91399" BBK_DIFF_A="0.85174"/>
      <bbk:Obs TIME_PERIOD="1997-11-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1997-11-15" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1997-11-14" OBS_VALUE="-4.76573" BBK_DIFF_A="0.0607"/>
      <bbk:Obs TIME_PERIOD="1997-11-13" OBS_VALUE="-4.82643" BBK_DIFF_A="-0.70995"/>
      <bbk:Obs TIME_PERIOD="1997-11-12" OBS_VALUE="-4.11648" BBK_DIFF_A="-0.63448"/>
      <bbk:Obs TIME_PERIOD="1997-11-11" OBS_VALUE="-3.482" BBK_DIFF_A="0.23266"/>
      <bbk:Obs TIME_PERIOD="1997-11-10" OBS_VALUE="-3.71466" BBK_DIFF_A="1.1574"/>
      <bbk:Obs TIME_PERIOD="1997-11-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1997-11-08" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1997-11-07" OBS_VALUE="-4.87206" BBK_DIFF_A="0.11417"/>
      <bbk:Obs TIME_PERIOD="1997-11-06" OBS_VALUE="-4.98623" BBK_DIFF_A="-0.97359"/>
      <bbk:Obs TIME_PERIOD="1997-11-05" OBS_VALUE="-4.01264" BBK_DIFF_A="-0.47854"/>
      <bbk:Obs TIME_PERIOD="1997-11-04" OBS_VALUE="-3.5341" BBK_DIFF_A="0.00777"/>
      <bbk:Obs TIME_PERIOD="1997-11-03" OBS_VALUE="-3.54187" BBK_DIFF_A="0.06754"/>
      <bbk:Obs TIME_PERIOD="1997-11-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1997-11-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1997-10-31" OBS_VALUE="-3.60941" BBK_DIFF_A="-0.11039"/>
      <bbk:Obs TIME_PERIOD="1997-10-30" OBS_VALUE="-3.49902" BBK_DIFF_A="0.35051"/>
      <bbk:Obs TIME_PERIOD="1997-10-29" OBS_VALUE="-3.84953" BBK_DIFF_A="0.17353"/>
      <bbk:Obs TIME_PERIOD="1997-10-28" OBS_VALUE="-4.02306" BBK_DIFF_A="-0.63295"/>
      <bbk:Obs TIME_PERIOD="1997-10-27" OBS_VALUE="-3.39011" BBK_DIFF_A="0.0744"/>
      <bbk:Obs TIME_PERIOD="1997-10-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1997-10-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1997-10-24" OBS_VALUE="-3.46451" BBK_DIFF_A="-0.04459"/>
      <bbk:Obs TIME_PERIOD="1997-10-23" OBS_VALUE="-3.41992" BBK_DIFF_A="0.03789"/>
      <bbk:Obs TIME_PERIOD="1997-10-22" OBS_VALUE="-3.45781" BBK_DIFF_A="0.0241"/>
      <bbk:Obs TIME_PERIOD="1997-10-21" OBS_VALUE="-3.48191" BBK_DIFF_A="0.07881"/>
      <bbk:Obs TIME_PERIOD="1997-10-20" OBS_VALUE="-3.56072" BBK_DIFF_A="-0.04745"/>
      <bbk:Obs TIME_PERIOD="1997-10-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1997-10-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1997-10-17" OBS_VALUE="-3.51327" BBK_DIFF_A="0.10518"/>
      <bbk:Obs TIME_PERIOD="1997-10-16" OBS_VALUE="-3.61845" BBK_DIFF_A="-0.20056"/>
      <bbk:Obs TIME_PERIOD="1997-10-15" OBS_VALUE="-3.41789" BBK_DIFF_A="0.03806"/>
      <bbk:Obs TIME_PERIOD="1997-10-14" OBS_VALUE="-3.45595" BBK_DIFF_A="-0.02795"/>
      <bbk:Obs TIME_PERIOD="1997-10-13" OBS_VALUE="-3.428" BBK_DIFF_A="-0.02399"/>
      <bbk:Obs TIME_PERIOD="1997-10-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1997-10-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1997-10-10" OBS_VALUE="-3.40401" BBK_DIFF_A="0.32133"/>
      <bbk:Obs TIME_PERIOD="1997-10-09" OBS_VALUE="-3.72534" BBK_DIFF_A="-0.03303"/>
      <bbk:Obs TIME_PERIOD="1997-10-08" OBS_VALUE="-3.69231" BBK_DIFF_A="-0.06843"/>
      <bbk:Obs TIME_PERIOD="1997-10-07" OBS_VALUE="-3.62388" BBK_DIFF_A="0.17975"/>
      <bbk:Obs TIME_PERIOD="1997-10-06" OBS_VALUE="-3.80363" BBK_DIFF_A="-0.15384"/>
      <bbk:Obs TIME_PERIOD="1997-10-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1997-10-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1997-10-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1997-10-02" OBS_VALUE="-3.64979" BBK_DIFF_A="0.13759"/>
      <bbk:Obs TIME_PERIOD="1997-10-01" OBS_VALUE="-3.78738" BBK_DIFF_A="-0.05355"/>
      <bbk:Obs TIME_PERIOD="1997-09-30" OBS_VALUE="-3.73383" BBK_DIFF_A="-2.388"/>
      <bbk:Obs TIME_PERIOD="1997-09-29" OBS_VALUE="-1.34583" BBK_DIFF_A="2.38376"/>
      <bbk:Obs TIME_PERIOD="1997-09-28" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1997-09-27" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1997-09-26" OBS_VALUE="-3.72959" BBK_DIFF_A="0.10248"/>
      <bbk:Obs TIME_PERIOD="1997-09-25" OBS_VALUE="-3.83207" BBK_DIFF_A="-0.10534"/>
      <bbk:Obs TIME_PERIOD="1997-09-24" OBS_VALUE="-3.72673" BBK_DIFF_A="0.23742"/>
      <bbk:Obs TIME_PERIOD="1997-09-23" OBS_VALUE="-3.96415" BBK_DIFF_A="-0.19037"/>
      <bbk:Obs TIME_PERIOD="1997-09-22" OBS_VALUE="-3.77378" BBK_DIFF_A="0.12475"/>
      <bbk:Obs TIME_PERIOD="1997-09-21" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1997-09-20" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1997-09-19" OBS_VALUE="-3.89853" BBK_DIFF_A="0.04811"/>
      <bbk:Obs TIME_PERIOD="1997-09-18" OBS_VALUE="-3.94664" BBK_DIFF_A="-0.02929"/>
      <bbk:Obs TIME_PERIOD="1997-09-17" OBS_VALUE="-3.91735" BBK_DIFF_A="-0.35308"/>
      <bbk:Obs TIME_PERIOD="1997-09-16" OBS_VALUE="-3.56427" BBK_DIFF_A="0.4412"/>
      <bbk:Obs TIME_PERIOD="1997-09-15" OBS_VALUE="-4.00547" BBK_DIFF_A="0.0767"/>
      <bbk:Obs TIME_PERIOD="1997-09-14" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1997-09-13" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1997-09-12" OBS_VALUE="-4.08217" BBK_DIFF_A="0.01491"/>
      <bbk:Obs TIME_PERIOD="1997-09-11" OBS_VALUE="-4.09708" BBK_DIFF_A="0.02086"/>
      <bbk:Obs TIME_PERIOD="1997-09-10" OBS_VALUE="-4.11794" BBK_DIFF_A="-0.00878"/>
      <bbk:Obs TIME_PERIOD="1997-09-09" OBS_VALUE="-4.10916" BBK_DIFF_A="0.06855"/>
      <bbk:Obs TIME_PERIOD="1997-09-08" OBS_VALUE="-4.17771" BBK_DIFF_A="-0.1272"/>
      <bbk:Obs TIME_PERIOD="1997-09-07" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1997-09-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1997-09-05" OBS_VALUE="-4.05051" BBK_DIFF_A="0.07233"/>
      <bbk:Obs TIME_PERIOD="1997-09-04" OBS_VALUE="-4.12284" BBK_DIFF_A="-0.08933"/>
      <bbk:Obs TIME_PERIOD="1997-09-03" OBS_VALUE="-4.03351" BBK_DIFF_A="0.11223"/>
      <bbk:Obs TIME_PERIOD="1997-09-02" OBS_VALUE="-4.14574" BBK_DIFF_A="-0.01292"/>
      <bbk:Obs TIME_PERIOD="1997-09-01" OBS_VALUE="-4.13282" BBK_DIFF_A="0.01223"/>
      <bbk:Obs TIME_PERIOD="1997-08-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1997-08-30" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1997-08-29" OBS_VALUE="-4.14505" BBK_DIFF_A="-0.60961"/>
      <bbk:Obs TIME_PERIOD="1997-08-28" OBS_VALUE="-3.53544" BBK_DIFF_A="0.28639"/>
      <bbk:Obs TIME_PERIOD="1997-08-27" OBS_VALUE="-3.82183" BBK_DIFF_A="0.18837"/>
      <bbk:Obs TIME_PERIOD="1997-08-26" OBS_VALUE="-4.0102" BBK_DIFF_A="0.00325"/>
      <bbk:Obs TIME_PERIOD="1997-08-25" OBS_VALUE="-4.01345" BBK_DIFF_A="-0.24706"/>
      <bbk:Obs TIME_PERIOD="1997-08-24" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1997-08-23" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1997-08-22" OBS_VALUE="-3.76639" BBK_DIFF_A="-0.03049"/>
      <bbk:Obs TIME_PERIOD="1997-08-21" OBS_VALUE="-3.7359" BBK_DIFF_A="0.28968"/>
      <bbk:Obs TIME_PERIOD="1997-08-20" OBS_VALUE="-4.02558" BBK_DIFF_A="0.08048"/>
      <bbk:Obs TIME_PERIOD="1997-08-19" OBS_VALUE="-4.10606" BBK_DIFF_A="0.06003"/>
      <bbk:Obs TIME_PERIOD="1997-08-18" OBS_VALUE="-4.16609" BBK_DIFF_A="-0.38655"/>
      <bbk:Obs TIME_PERIOD="1997-08-17" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1997-08-16" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1997-08-15" OBS_VALUE="-3.77954" BBK_DIFF_A="0.16489"/>
      <bbk:Obs TIME_PERIOD="1997-08-14" OBS_VALUE="-3.94443" BBK_DIFF_A="0.32778"/>
      <bbk:Obs TIME_PERIOD="1997-08-13" OBS_VALUE="-4.27221" BBK_DIFF_A="-0.00406"/>
      <bbk:Obs TIME_PERIOD="1997-08-12" OBS_VALUE="-4.26815" BBK_DIFF_A="0.09557"/>
      <bbk:Obs TIME_PERIOD="1997-08-11" OBS_VALUE="-4.36372" BBK_DIFF_A="0.07128"/>
      <bbk:Obs TIME_PERIOD="1997-08-10" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1997-08-09" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1997-08-08" OBS_VALUE="-4.435" BBK_DIFF_A="-0.103"/>
      <bbk:Obs TIME_PERIOD="1997-08-07" OBS_VALUE="-4.332" BBK_DIFF_A="-0.7949"/>
      <bbk:Obs TIME_PERIOD="1997-08-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1997-08-05" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1997-08-04" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1997-08-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1997-08-02" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="1997-08-01" BBK_OBS_STATUS="K"/>
    </bbk:Series>
  </bbk:DataSet>
</CompactData>
