<?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_B3_EUR_S122_B_A100__Z_R_A_A__Z__Z_A</ID>
    <Test>false</Test>
    <Truncated>false</Truncated>
    <Prepared>2026-04-30T03:36:25</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.B3.EUR.S122.B.A100._Z.R.A.A._Z._Z.A" DECIMALS="5" UNIT="" UNIT_MULT="0" BBK_TITLE="Zinsstrukturkurve / Parameter Beta3 (Svensson-Methode) /          Hypothekenpfandbriefe und Öffentliche Pfandbriefe / Tageswerte" BBK_TITLE_ENG="Term structure of interest rates on Pfandbriefe(method by Svensson) / Parameter Beta3 / daily data">
      <bbk:Obs TIME_PERIOD="2026-04-28" OBS_VALUE="-30.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2026-04-27" OBS_VALUE="-30.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2026-04-26" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2026-04-25" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2026-04-24" OBS_VALUE="-30.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2026-04-23" OBS_VALUE="-30.0" BBK_DIFF_A="-0.23731"/>
      <bbk:Obs TIME_PERIOD="2026-04-22" OBS_VALUE="-29.76269" BBK_DIFF_A="0.15704"/>
      <bbk:Obs TIME_PERIOD="2026-04-21" OBS_VALUE="-29.91973" BBK_DIFF_A="0.00493"/>
      <bbk:Obs TIME_PERIOD="2026-04-20" OBS_VALUE="-29.92466" BBK_DIFF_A="-5.3E-4"/>
      <bbk:Obs TIME_PERIOD="2026-04-19" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2026-04-18" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2026-04-17" OBS_VALUE="-29.92413" BBK_DIFF_A="0.07587"/>
      <bbk:Obs TIME_PERIOD="2026-04-16" OBS_VALUE="-30.0" BBK_DIFF_A="-0.01824"/>
      <bbk:Obs TIME_PERIOD="2026-04-15" OBS_VALUE="-29.98176" BBK_DIFF_A="-0.04803"/>
      <bbk:Obs TIME_PERIOD="2026-04-14" OBS_VALUE="-29.93373" BBK_DIFF_A="-0.05977"/>
      <bbk:Obs TIME_PERIOD="2026-04-13" OBS_VALUE="-29.87396" BBK_DIFF_A="0.02204"/>
      <bbk:Obs TIME_PERIOD="2026-04-12" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2026-04-11" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2026-04-10" OBS_VALUE="-29.896" BBK_DIFF_A="-0.17316"/>
      <bbk:Obs TIME_PERIOD="2026-04-09" OBS_VALUE="-29.72284" BBK_DIFF_A="0.0046"/>
      <bbk:Obs TIME_PERIOD="2026-04-08" OBS_VALUE="-29.72744" BBK_DIFF_A="0.09382"/>
      <bbk:Obs TIME_PERIOD="2026-04-07" OBS_VALUE="-29.82126" BBK_DIFF_A="-0.02807"/>
      <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="-29.79319" BBK_DIFF_A="0.16688"/>
      <bbk:Obs TIME_PERIOD="2026-04-01" OBS_VALUE="-29.96007" BBK_DIFF_A="0.00328"/>
      <bbk:Obs TIME_PERIOD="2026-03-31" OBS_VALUE="-29.96335" BBK_DIFF_A="-0.63219"/>
      <bbk:Obs TIME_PERIOD="2026-03-30" OBS_VALUE="-29.33116" BBK_DIFF_A="-0.28808"/>
      <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="-29.04308" BBK_DIFF_A="-0.43851"/>
      <bbk:Obs TIME_PERIOD="2026-03-26" OBS_VALUE="-28.60457" BBK_DIFF_A="0.05216"/>
      <bbk:Obs TIME_PERIOD="2026-03-25" OBS_VALUE="-28.65673" BBK_DIFF_A="-0.80833"/>
      <bbk:Obs TIME_PERIOD="2026-03-24" OBS_VALUE="-27.8484" BBK_DIFF_A="-0.2681"/>
      <bbk:Obs TIME_PERIOD="2026-03-23" OBS_VALUE="-27.5803" BBK_DIFF_A="-0.68943"/>
      <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="-26.89087" BBK_DIFF_A="0.0224"/>
      <bbk:Obs TIME_PERIOD="2026-03-19" OBS_VALUE="-26.91327" BBK_DIFF_A="0.04043"/>
      <bbk:Obs TIME_PERIOD="2026-03-18" OBS_VALUE="-26.9537" BBK_DIFF_A="-1.64484"/>
      <bbk:Obs TIME_PERIOD="2026-03-17" OBS_VALUE="-25.30886" BBK_DIFF_A="-1.07069"/>
      <bbk:Obs TIME_PERIOD="2026-03-16" OBS_VALUE="-24.23817" BBK_DIFF_A="-0.53573"/>
      <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="-23.70244" BBK_DIFF_A="-0.27503"/>
      <bbk:Obs TIME_PERIOD="2026-03-12" OBS_VALUE="-23.42741" BBK_DIFF_A="-0.63233"/>
      <bbk:Obs TIME_PERIOD="2026-03-11" OBS_VALUE="-22.79508" BBK_DIFF_A="-0.6747"/>
      <bbk:Obs TIME_PERIOD="2026-03-10" OBS_VALUE="-22.12038" BBK_DIFF_A="-1.08134"/>
      <bbk:Obs TIME_PERIOD="2026-03-09" OBS_VALUE="-21.03904" BBK_DIFF_A="-17.18878"/>
      <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="-3.85026" BBK_DIFF_A="0.32287"/>
      <bbk:Obs TIME_PERIOD="2026-03-05" OBS_VALUE="-4.17313" BBK_DIFF_A="-0.02966"/>
      <bbk:Obs TIME_PERIOD="2026-03-04" OBS_VALUE="-4.14347" BBK_DIFF_A="0.11532"/>
      <bbk:Obs TIME_PERIOD="2026-03-03" OBS_VALUE="-4.25879" BBK_DIFF_A="0.37223"/>
      <bbk:Obs TIME_PERIOD="2026-03-02" OBS_VALUE="-4.63102" BBK_DIFF_A="0.02605"/>
      <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="-4.65707" BBK_DIFF_A="0.01694"/>
      <bbk:Obs TIME_PERIOD="2026-02-26" OBS_VALUE="-4.67401" BBK_DIFF_A="0.03343"/>
      <bbk:Obs TIME_PERIOD="2026-02-25" OBS_VALUE="-4.70744" BBK_DIFF_A="-0.05246"/>
      <bbk:Obs TIME_PERIOD="2026-02-24" OBS_VALUE="-4.65498" BBK_DIFF_A="-0.04034"/>
      <bbk:Obs TIME_PERIOD="2026-02-23" OBS_VALUE="-4.61464" BBK_DIFF_A="0.00904"/>
      <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="-4.62368" BBK_DIFF_A="0.01921"/>
      <bbk:Obs TIME_PERIOD="2026-02-19" OBS_VALUE="-4.64289" BBK_DIFF_A="0.04764"/>
      <bbk:Obs TIME_PERIOD="2026-02-18" OBS_VALUE="-4.69053" BBK_DIFF_A="1.3E-4"/>
      <bbk:Obs TIME_PERIOD="2026-02-17" OBS_VALUE="-4.69066" BBK_DIFF_A="-0.01361"/>
      <bbk:Obs TIME_PERIOD="2026-02-16" OBS_VALUE="-4.67705" BBK_DIFF_A="-0.01922"/>
      <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="-4.65783" BBK_DIFF_A="-0.04543"/>
      <bbk:Obs TIME_PERIOD="2026-02-12" OBS_VALUE="-4.6124" BBK_DIFF_A="0.17789"/>
      <bbk:Obs TIME_PERIOD="2026-02-11" OBS_VALUE="-4.79029" BBK_DIFF_A="-0.0463"/>
      <bbk:Obs TIME_PERIOD="2026-02-10" OBS_VALUE="-4.74399" BBK_DIFF_A="-0.1268"/>
      <bbk:Obs TIME_PERIOD="2026-02-09" OBS_VALUE="-4.61719" BBK_DIFF_A="0.06722"/>
      <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="-4.68441" BBK_DIFF_A="-0.02982"/>
      <bbk:Obs TIME_PERIOD="2026-02-05" OBS_VALUE="-4.65459" BBK_DIFF_A="0.00739"/>
      <bbk:Obs TIME_PERIOD="2026-02-04" OBS_VALUE="-4.66198" BBK_DIFF_A="-0.04084"/>
      <bbk:Obs TIME_PERIOD="2026-02-03" OBS_VALUE="-4.62114" BBK_DIFF_A="0.05978"/>
      <bbk:Obs TIME_PERIOD="2026-02-02" OBS_VALUE="-4.68092" BBK_DIFF_A="0.41166"/>
      <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="-5.09258" BBK_DIFF_A="-0.0425"/>
      <bbk:Obs TIME_PERIOD="2026-01-29" OBS_VALUE="-5.05008" BBK_DIFF_A="-0.05461"/>
      <bbk:Obs TIME_PERIOD="2026-01-28" OBS_VALUE="-4.99547" BBK_DIFF_A="-0.1439"/>
      <bbk:Obs TIME_PERIOD="2026-01-27" OBS_VALUE="-4.85157" BBK_DIFF_A="-0.01088"/>
      <bbk:Obs TIME_PERIOD="2026-01-26" OBS_VALUE="-4.84069" BBK_DIFF_A="-0.04672"/>
      <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="-4.79397" BBK_DIFF_A="-0.06584"/>
      <bbk:Obs TIME_PERIOD="2026-01-22" OBS_VALUE="-4.72813" BBK_DIFF_A="-0.00415"/>
      <bbk:Obs TIME_PERIOD="2026-01-21" OBS_VALUE="-4.72398" BBK_DIFF_A="-0.14831"/>
      <bbk:Obs TIME_PERIOD="2026-01-20" OBS_VALUE="-4.57567" BBK_DIFF_A="-0.0059"/>
      <bbk:Obs TIME_PERIOD="2026-01-19" OBS_VALUE="-4.56977" BBK_DIFF_A="-0.14379"/>
      <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="-4.42598" BBK_DIFF_A="0.11706"/>
      <bbk:Obs TIME_PERIOD="2026-01-15" OBS_VALUE="-4.54304" BBK_DIFF_A="0.03686"/>
      <bbk:Obs TIME_PERIOD="2026-01-14" OBS_VALUE="-4.5799" BBK_DIFF_A="0.15875"/>
      <bbk:Obs TIME_PERIOD="2026-01-13" OBS_VALUE="-4.73865" BBK_DIFF_A="-0.17759"/>
      <bbk:Obs TIME_PERIOD="2026-01-12" OBS_VALUE="-4.56106" BBK_DIFF_A="0.02159"/>
      <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="-4.58265" BBK_DIFF_A="-0.06491"/>
      <bbk:Obs TIME_PERIOD="2026-01-08" OBS_VALUE="-4.51774" BBK_DIFF_A="0.02492"/>
      <bbk:Obs TIME_PERIOD="2026-01-07" OBS_VALUE="-4.54266" BBK_DIFF_A="0.04177"/>
      <bbk:Obs TIME_PERIOD="2026-01-06" OBS_VALUE="-4.58443" BBK_DIFF_A="0.06256"/>
      <bbk:Obs TIME_PERIOD="2026-01-05" OBS_VALUE="-4.64699" BBK_DIFF_A="0.22772"/>
      <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="-4.87471" BBK_DIFF_A="-0.13091"/>
      <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="-4.7438" BBK_DIFF_A="-0.12468"/>
      <bbk:Obs TIME_PERIOD="2025-12-29" OBS_VALUE="-4.61912" BBK_DIFF_A="0.10235"/>
      <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="-4.72147" BBK_DIFF_A="-0.15329"/>
      <bbk:Obs TIME_PERIOD="2025-12-22" OBS_VALUE="-4.56818" BBK_DIFF_A="0.03809"/>
      <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="-4.60627" BBK_DIFF_A="-0.11471"/>
      <bbk:Obs TIME_PERIOD="2025-12-18" OBS_VALUE="-4.49156" BBK_DIFF_A="-0.1047"/>
      <bbk:Obs TIME_PERIOD="2025-12-17" OBS_VALUE="-4.38686" BBK_DIFF_A="-0.06194"/>
      <bbk:Obs TIME_PERIOD="2025-12-16" OBS_VALUE="-4.32492" BBK_DIFF_A="-0.03533"/>
      <bbk:Obs TIME_PERIOD="2025-12-15" OBS_VALUE="-4.28959" BBK_DIFF_A="-0.0161"/>
      <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="-4.27349" BBK_DIFF_A="-0.00477"/>
      <bbk:Obs TIME_PERIOD="2025-12-11" OBS_VALUE="-4.26872" BBK_DIFF_A="-0.08234"/>
      <bbk:Obs TIME_PERIOD="2025-12-10" OBS_VALUE="-4.18638" BBK_DIFF_A="0.0292"/>
      <bbk:Obs TIME_PERIOD="2025-12-09" OBS_VALUE="-4.21558" BBK_DIFF_A="0.11119"/>
      <bbk:Obs TIME_PERIOD="2025-12-08" OBS_VALUE="-4.32677" BBK_DIFF_A="0.15417"/>
      <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="-4.48094" BBK_DIFF_A="0.03663"/>
      <bbk:Obs TIME_PERIOD="2025-12-04" OBS_VALUE="-4.51757" BBK_DIFF_A="0.05501"/>
      <bbk:Obs TIME_PERIOD="2025-12-03" OBS_VALUE="-4.57258" BBK_DIFF_A="-0.07605"/>
      <bbk:Obs TIME_PERIOD="2025-12-02" OBS_VALUE="-4.49653" BBK_DIFF_A="0.1586"/>
      <bbk:Obs TIME_PERIOD="2025-12-01" OBS_VALUE="-4.65513" BBK_DIFF_A="-0.07981"/>
      <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="-4.57532" BBK_DIFF_A="0.03565"/>
      <bbk:Obs TIME_PERIOD="2025-11-27" OBS_VALUE="-4.61097" BBK_DIFF_A="0.01177"/>
      <bbk:Obs TIME_PERIOD="2025-11-26" OBS_VALUE="-4.62274" BBK_DIFF_A="0.01708"/>
      <bbk:Obs TIME_PERIOD="2025-11-25" OBS_VALUE="-4.63982" BBK_DIFF_A="-0.0447"/>
      <bbk:Obs TIME_PERIOD="2025-11-24" OBS_VALUE="-4.59512" BBK_DIFF_A="0.00968"/>
      <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="-4.6048" BBK_DIFF_A="-0.08701"/>
      <bbk:Obs TIME_PERIOD="2025-11-20" OBS_VALUE="-4.51779" BBK_DIFF_A="0.02389"/>
      <bbk:Obs TIME_PERIOD="2025-11-19" OBS_VALUE="-4.54168" BBK_DIFF_A="-0.09179"/>
      <bbk:Obs TIME_PERIOD="2025-11-18" OBS_VALUE="-4.44989" BBK_DIFF_A="-0.00194"/>
      <bbk:Obs TIME_PERIOD="2025-11-17" OBS_VALUE="-4.44795" BBK_DIFF_A="-0.05033"/>
      <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="-4.39762" BBK_DIFF_A="-0.02776"/>
      <bbk:Obs TIME_PERIOD="2025-11-13" OBS_VALUE="-4.36986" BBK_DIFF_A="0.00823"/>
      <bbk:Obs TIME_PERIOD="2025-11-12" OBS_VALUE="-4.37809" BBK_DIFF_A="-0.05495"/>
      <bbk:Obs TIME_PERIOD="2025-11-11" OBS_VALUE="-4.32314" BBK_DIFF_A="0.05489"/>
      <bbk:Obs TIME_PERIOD="2025-11-10" OBS_VALUE="-4.37803" BBK_DIFF_A="-0.05492"/>
      <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="-4.32311" BBK_DIFF_A="-0.03521"/>
      <bbk:Obs TIME_PERIOD="2025-11-06" OBS_VALUE="-4.2879" BBK_DIFF_A="0.09484"/>
      <bbk:Obs TIME_PERIOD="2025-11-05" OBS_VALUE="-4.38274" BBK_DIFF_A="-0.02571"/>
      <bbk:Obs TIME_PERIOD="2025-11-04" OBS_VALUE="-4.35703" BBK_DIFF_A="0.04448"/>
      <bbk:Obs TIME_PERIOD="2025-11-03" OBS_VALUE="-4.40151" BBK_DIFF_A="-0.1209"/>
      <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="-4.28061" BBK_DIFF_A="-0.13371"/>
      <bbk:Obs TIME_PERIOD="2025-10-30" OBS_VALUE="-4.1469" BBK_DIFF_A="0.11001"/>
      <bbk:Obs TIME_PERIOD="2025-10-29" OBS_VALUE="-4.25691" BBK_DIFF_A="0.02899"/>
      <bbk:Obs TIME_PERIOD="2025-10-28" OBS_VALUE="-4.2859" BBK_DIFF_A="0.05283"/>
      <bbk:Obs TIME_PERIOD="2025-10-27" OBS_VALUE="-4.33873" BBK_DIFF_A="0.02957"/>
      <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="-4.3683" BBK_DIFF_A="0.0921"/>
      <bbk:Obs TIME_PERIOD="2025-10-23" OBS_VALUE="-4.4604" BBK_DIFF_A="0.00316"/>
      <bbk:Obs TIME_PERIOD="2025-10-22" OBS_VALUE="-4.46356" BBK_DIFF_A="0.05341"/>
      <bbk:Obs TIME_PERIOD="2025-10-21" OBS_VALUE="-4.51697" BBK_DIFF_A="0.01156"/>
      <bbk:Obs TIME_PERIOD="2025-10-20" OBS_VALUE="-4.52853" BBK_DIFF_A="0.04769"/>
      <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="-4.57622" BBK_DIFF_A="-0.10893"/>
      <bbk:Obs TIME_PERIOD="2025-10-16" OBS_VALUE="-4.46729" BBK_DIFF_A="-0.04037"/>
      <bbk:Obs TIME_PERIOD="2025-10-15" OBS_VALUE="-4.42692" BBK_DIFF_A="-0.00564"/>
      <bbk:Obs TIME_PERIOD="2025-10-14" OBS_VALUE="-4.42128" BBK_DIFF_A="-0.14317"/>
      <bbk:Obs TIME_PERIOD="2025-10-13" OBS_VALUE="-4.27811" BBK_DIFF_A="-0.06692"/>
      <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="-4.21119" BBK_DIFF_A="0.03912"/>
      <bbk:Obs TIME_PERIOD="2025-10-09" OBS_VALUE="-4.25031" BBK_DIFF_A="0.07751"/>
      <bbk:Obs TIME_PERIOD="2025-10-08" OBS_VALUE="-4.32782" BBK_DIFF_A="-0.06821"/>
      <bbk:Obs TIME_PERIOD="2025-10-07" OBS_VALUE="-4.25961" BBK_DIFF_A="-0.05626"/>
      <bbk:Obs TIME_PERIOD="2025-10-06" OBS_VALUE="-4.20335" BBK_DIFF_A="-0.20314"/>
      <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="-4.00021" BBK_DIFF_A="0.04692"/>
      <bbk:Obs TIME_PERIOD="2025-10-02" OBS_VALUE="-4.04713" BBK_DIFF_A="-0.05841"/>
      <bbk:Obs TIME_PERIOD="2025-10-01" OBS_VALUE="-3.98872" BBK_DIFF_A="-0.0483"/>
      <bbk:Obs TIME_PERIOD="2025-09-30" OBS_VALUE="-3.94042" BBK_DIFF_A="0.02791"/>
      <bbk:Obs TIME_PERIOD="2025-09-29" OBS_VALUE="-3.96833" BBK_DIFF_A="-0.07124"/>
      <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="-3.89709" BBK_DIFF_A="0.06338"/>
      <bbk:Obs TIME_PERIOD="2025-09-25" OBS_VALUE="-3.96047" BBK_DIFF_A="0.00539"/>
      <bbk:Obs TIME_PERIOD="2025-09-24" OBS_VALUE="-3.96586" BBK_DIFF_A="0.01888"/>
      <bbk:Obs TIME_PERIOD="2025-09-23" OBS_VALUE="-3.98474" BBK_DIFF_A="-0.02467"/>
      <bbk:Obs TIME_PERIOD="2025-09-22" OBS_VALUE="-3.96007" BBK_DIFF_A="0.01699"/>
      <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="-3.97706" BBK_DIFF_A="-0.00504"/>
      <bbk:Obs TIME_PERIOD="2025-09-18" OBS_VALUE="-3.97202" BBK_DIFF_A="0.10419"/>
      <bbk:Obs TIME_PERIOD="2025-09-17" OBS_VALUE="-4.07621" BBK_DIFF_A="0.01159"/>
      <bbk:Obs TIME_PERIOD="2025-09-16" OBS_VALUE="-4.0878" BBK_DIFF_A="0.01342"/>
      <bbk:Obs TIME_PERIOD="2025-09-15" OBS_VALUE="-4.10122" BBK_DIFF_A="-0.05802"/>
      <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="-4.0432" BBK_DIFF_A="0.26031"/>
      <bbk:Obs TIME_PERIOD="2025-09-11" OBS_VALUE="-4.30351" BBK_DIFF_A="0.0114"/>
      <bbk:Obs TIME_PERIOD="2025-09-10" OBS_VALUE="-4.31491" BBK_DIFF_A="-0.02981"/>
      <bbk:Obs TIME_PERIOD="2025-09-09" OBS_VALUE="-4.2851" BBK_DIFF_A="0.01074"/>
      <bbk:Obs TIME_PERIOD="2025-09-08" OBS_VALUE="-4.29584" BBK_DIFF_A="-0.06801"/>
      <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="-4.22783" BBK_DIFF_A="0.06327"/>
      <bbk:Obs TIME_PERIOD="2025-09-04" OBS_VALUE="-4.2911" BBK_DIFF_A="0.04473"/>
      <bbk:Obs TIME_PERIOD="2025-09-03" OBS_VALUE="-4.33583" BBK_DIFF_A="-0.00145"/>
      <bbk:Obs TIME_PERIOD="2025-09-02" OBS_VALUE="-4.33438" BBK_DIFF_A="0.05515"/>
      <bbk:Obs TIME_PERIOD="2025-09-01" OBS_VALUE="-4.38953" BBK_DIFF_A="-0.02636"/>
      <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="-4.36317" BBK_DIFF_A="-0.02618"/>
      <bbk:Obs TIME_PERIOD="2025-08-28" OBS_VALUE="-4.33699" BBK_DIFF_A="-0.09997"/>
      <bbk:Obs TIME_PERIOD="2025-08-27" OBS_VALUE="-4.23702" BBK_DIFF_A="0.07953"/>
      <bbk:Obs TIME_PERIOD="2025-08-26" OBS_VALUE="-4.31655" BBK_DIFF_A="-0.10093"/>
      <bbk:Obs TIME_PERIOD="2025-08-25" OBS_VALUE="-4.21562" BBK_DIFF_A="-0.16526"/>
      <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="-4.05036" BBK_DIFF_A="0.11055"/>
      <bbk:Obs TIME_PERIOD="2025-08-21" OBS_VALUE="-4.16091" BBK_DIFF_A="0.02758"/>
      <bbk:Obs TIME_PERIOD="2025-08-20" OBS_VALUE="-4.18849" BBK_DIFF_A="-0.04882"/>
      <bbk:Obs TIME_PERIOD="2025-08-19" OBS_VALUE="-4.13967" BBK_DIFF_A="-0.09934"/>
      <bbk:Obs TIME_PERIOD="2025-08-18" OBS_VALUE="-4.04033" BBK_DIFF_A="0.00721"/>
      <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="-4.04754" BBK_DIFF_A="0.02207"/>
      <bbk:Obs TIME_PERIOD="2025-08-14" OBS_VALUE="-4.06961" BBK_DIFF_A="-0.28161"/>
      <bbk:Obs TIME_PERIOD="2025-08-13" OBS_VALUE="-3.788" BBK_DIFF_A="0.91617"/>
      <bbk:Obs TIME_PERIOD="2025-08-12" OBS_VALUE="-4.70417" BBK_DIFF_A="-0.36599"/>
      <bbk:Obs TIME_PERIOD="2025-08-11" OBS_VALUE="-4.33818" BBK_DIFF_A="-0.02708"/>
      <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="-4.3111" BBK_DIFF_A="0.00481"/>
      <bbk:Obs TIME_PERIOD="2025-08-07" OBS_VALUE="-4.31591" BBK_DIFF_A="-5.0E-4"/>
      <bbk:Obs TIME_PERIOD="2025-08-06" OBS_VALUE="-4.31541" BBK_DIFF_A="-0.02003"/>
      <bbk:Obs TIME_PERIOD="2025-08-05" OBS_VALUE="-4.29538" BBK_DIFF_A="0.0779"/>
      <bbk:Obs TIME_PERIOD="2025-08-04" OBS_VALUE="-4.37328" BBK_DIFF_A="-0.06146"/>
      <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="-4.31182" BBK_DIFF_A="-0.05152"/>
      <bbk:Obs TIME_PERIOD="2025-07-31" OBS_VALUE="-4.2603" BBK_DIFF_A="-0.02084"/>
      <bbk:Obs TIME_PERIOD="2025-07-30" OBS_VALUE="-4.23946" BBK_DIFF_A="0.09943"/>
      <bbk:Obs TIME_PERIOD="2025-07-29" OBS_VALUE="-4.33889" BBK_DIFF_A="-0.21827"/>
      <bbk:Obs TIME_PERIOD="2025-07-28" OBS_VALUE="-4.12062" BBK_DIFF_A="-0.00806"/>
      <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="-4.11256" BBK_DIFF_A="0.28209"/>
      <bbk:Obs TIME_PERIOD="2025-07-24" OBS_VALUE="-4.39465" BBK_DIFF_A="0.10727"/>
      <bbk:Obs TIME_PERIOD="2025-07-23" OBS_VALUE="-4.50192" BBK_DIFF_A="-0.04035"/>
      <bbk:Obs TIME_PERIOD="2025-07-22" OBS_VALUE="-4.46157" BBK_DIFF_A="-0.06047"/>
      <bbk:Obs TIME_PERIOD="2025-07-21" OBS_VALUE="-4.4011" BBK_DIFF_A="-0.20518"/>
      <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="-4.19592" BBK_DIFF_A="0.07693"/>
      <bbk:Obs TIME_PERIOD="2025-07-17" OBS_VALUE="-4.27285" BBK_DIFF_A="-0.07518"/>
      <bbk:Obs TIME_PERIOD="2025-07-16" OBS_VALUE="-4.19767" BBK_DIFF_A="0.02715"/>
      <bbk:Obs TIME_PERIOD="2025-07-15" OBS_VALUE="-4.22482" BBK_DIFF_A="-0.08892"/>
      <bbk:Obs TIME_PERIOD="2025-07-14" OBS_VALUE="-4.1359" BBK_DIFF_A="-0.07609"/>
      <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="-4.05981" BBK_DIFF_A="0.0739"/>
      <bbk:Obs TIME_PERIOD="2025-07-10" OBS_VALUE="-4.13371" BBK_DIFF_A="-0.03685"/>
      <bbk:Obs TIME_PERIOD="2025-07-09" OBS_VALUE="-4.09686" BBK_DIFF_A="-0.01347"/>
      <bbk:Obs TIME_PERIOD="2025-07-08" OBS_VALUE="-4.08339" BBK_DIFF_A="0.14954"/>
      <bbk:Obs TIME_PERIOD="2025-07-07" OBS_VALUE="-4.23293" BBK_DIFF_A="0.09278"/>
      <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="-4.32571" BBK_DIFF_A="-0.05722"/>
      <bbk:Obs TIME_PERIOD="2025-07-03" OBS_VALUE="-4.26849" BBK_DIFF_A="-0.06723"/>
      <bbk:Obs TIME_PERIOD="2025-07-02" OBS_VALUE="-4.20126" BBK_DIFF_A="0.08603"/>
      <bbk:Obs TIME_PERIOD="2025-07-01" OBS_VALUE="-4.28729" BBK_DIFF_A="0.04232"/>
      <bbk:Obs TIME_PERIOD="2025-06-30" OBS_VALUE="-4.32961" BBK_DIFF_A="0.03332"/>
      <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="-4.36293" BBK_DIFF_A="-0.07741"/>
      <bbk:Obs TIME_PERIOD="2025-06-26" OBS_VALUE="-4.28552" BBK_DIFF_A="-0.06767"/>
      <bbk:Obs TIME_PERIOD="2025-06-25" OBS_VALUE="-4.21785" BBK_DIFF_A="-0.00355"/>
      <bbk:Obs TIME_PERIOD="2025-06-24" OBS_VALUE="-4.2143" BBK_DIFF_A="-0.13479"/>
      <bbk:Obs TIME_PERIOD="2025-06-23" OBS_VALUE="-4.07951" BBK_DIFF_A="0.04611"/>
      <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="-4.12562" BBK_DIFF_A="-0.00617"/>
      <bbk:Obs TIME_PERIOD="2025-06-19" OBS_VALUE="-4.11945" BBK_DIFF_A="0.0586"/>
      <bbk:Obs TIME_PERIOD="2025-06-18" OBS_VALUE="-4.17805" BBK_DIFF_A="0.0267"/>
      <bbk:Obs TIME_PERIOD="2025-06-17" OBS_VALUE="-4.20475" BBK_DIFF_A="-0.08433"/>
      <bbk:Obs TIME_PERIOD="2025-06-16" OBS_VALUE="-4.12042" BBK_DIFF_A="-0.02481"/>
      <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="-4.09561" BBK_DIFF_A="0.09116"/>
      <bbk:Obs TIME_PERIOD="2025-06-12" OBS_VALUE="-4.18677" BBK_DIFF_A="-0.10396"/>
      <bbk:Obs TIME_PERIOD="2025-06-11" OBS_VALUE="-4.08281" BBK_DIFF_A="-0.07545"/>
      <bbk:Obs TIME_PERIOD="2025-06-10" OBS_VALUE="-4.00736" BBK_DIFF_A="-0.09553"/>
      <bbk:Obs TIME_PERIOD="2025-06-09" OBS_VALUE="-3.91183" BBK_DIFF_A="0.06198"/>
      <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="-3.97381" BBK_DIFF_A="0.16564"/>
      <bbk:Obs TIME_PERIOD="2025-06-05" OBS_VALUE="-4.13945" BBK_DIFF_A="0.06184"/>
      <bbk:Obs TIME_PERIOD="2025-06-04" OBS_VALUE="-4.20129" BBK_DIFF_A="-0.00349"/>
      <bbk:Obs TIME_PERIOD="2025-06-03" OBS_VALUE="-4.1978" BBK_DIFF_A="-0.09868"/>
      <bbk:Obs TIME_PERIOD="2025-06-02" OBS_VALUE="-4.09912" BBK_DIFF_A="-0.0059"/>
      <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="-4.09322" BBK_DIFF_A="-0.07232"/>
      <bbk:Obs TIME_PERIOD="2025-05-29" OBS_VALUE="-4.0209" BBK_DIFF_A="-0.01292"/>
      <bbk:Obs TIME_PERIOD="2025-05-28" OBS_VALUE="-4.00798" BBK_DIFF_A="0.01952"/>
      <bbk:Obs TIME_PERIOD="2025-05-27" OBS_VALUE="-4.0275" BBK_DIFF_A="0.02575"/>
      <bbk:Obs TIME_PERIOD="2025-05-26" OBS_VALUE="-4.05325" BBK_DIFF_A="-0.03986"/>
      <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="-4.01339" BBK_DIFF_A="-0.03685"/>
      <bbk:Obs TIME_PERIOD="2025-05-22" OBS_VALUE="-3.97654" BBK_DIFF_A="0.01558"/>
      <bbk:Obs TIME_PERIOD="2025-05-21" OBS_VALUE="-3.99212" BBK_DIFF_A="-0.12521"/>
      <bbk:Obs TIME_PERIOD="2025-05-20" OBS_VALUE="-3.86691" BBK_DIFF_A="-0.01134"/>
      <bbk:Obs TIME_PERIOD="2025-05-19" OBS_VALUE="-3.85557" BBK_DIFF_A="-0.13827"/>
      <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="-3.7173" BBK_DIFF_A="0.00577"/>
      <bbk:Obs TIME_PERIOD="2025-05-15" OBS_VALUE="-3.72307" BBK_DIFF_A="0.03899"/>
      <bbk:Obs TIME_PERIOD="2025-05-14" OBS_VALUE="-3.76206" BBK_DIFF_A="0.00625"/>
      <bbk:Obs TIME_PERIOD="2025-05-13" OBS_VALUE="-3.76831" BBK_DIFF_A="-0.00538"/>
      <bbk:Obs TIME_PERIOD="2025-05-12" OBS_VALUE="-3.76293" BBK_DIFF_A="0.2349"/>
      <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="-3.99783" BBK_DIFF_A="0.05095"/>
      <bbk:Obs TIME_PERIOD="2025-05-08" OBS_VALUE="-4.04878" BBK_DIFF_A="0.03752"/>
      <bbk:Obs TIME_PERIOD="2025-05-07" OBS_VALUE="-4.0863" BBK_DIFF_A="0.00751"/>
      <bbk:Obs TIME_PERIOD="2025-05-06" OBS_VALUE="-4.09381" BBK_DIFF_A="-0.07152"/>
      <bbk:Obs TIME_PERIOD="2025-05-05" OBS_VALUE="-4.02229" BBK_DIFF_A="0.0137"/>
      <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="-4.03599" BBK_DIFF_A="0.03113"/>
      <bbk:Obs TIME_PERIOD="2025-05-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2025-04-30" OBS_VALUE="-4.06712" BBK_DIFF_A="0.06624"/>
      <bbk:Obs TIME_PERIOD="2025-04-29" OBS_VALUE="-4.13336" BBK_DIFF_A="-0.04424"/>
      <bbk:Obs TIME_PERIOD="2025-04-28" OBS_VALUE="-4.08912" BBK_DIFF_A="0.03749"/>
      <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="-4.12661" BBK_DIFF_A="0.02583"/>
      <bbk:Obs TIME_PERIOD="2025-04-24" OBS_VALUE="-4.15244" BBK_DIFF_A="0.02769"/>
      <bbk:Obs TIME_PERIOD="2025-04-23" OBS_VALUE="-4.18013" BBK_DIFF_A="0.08669"/>
      <bbk:Obs TIME_PERIOD="2025-04-22" OBS_VALUE="-4.26682" BBK_DIFF_A="-0.24819"/>
      <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="-4.01863" BBK_DIFF_A="0.05789"/>
      <bbk:Obs TIME_PERIOD="2025-04-16" OBS_VALUE="-4.07652" BBK_DIFF_A="-0.11302"/>
      <bbk:Obs TIME_PERIOD="2025-04-15" OBS_VALUE="-3.9635" BBK_DIFF_A="-0.08643"/>
      <bbk:Obs TIME_PERIOD="2025-04-14" OBS_VALUE="-3.87707" BBK_DIFF_A="0.15724"/>
      <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="-4.03431" BBK_DIFF_A="-0.43166"/>
      <bbk:Obs TIME_PERIOD="2025-04-10" OBS_VALUE="-3.60265" BBK_DIFF_A="0.55657"/>
      <bbk:Obs TIME_PERIOD="2025-04-09" OBS_VALUE="-4.15922" BBK_DIFF_A="-0.22772"/>
      <bbk:Obs TIME_PERIOD="2025-04-08" OBS_VALUE="-3.9315" BBK_DIFF_A="0.30709"/>
      <bbk:Obs TIME_PERIOD="2025-04-07" OBS_VALUE="-4.23859" BBK_DIFF_A="-0.42278"/>
      <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="-3.81581" BBK_DIFF_A="-0.18288"/>
      <bbk:Obs TIME_PERIOD="2025-04-03" OBS_VALUE="-3.63293" BBK_DIFF_A="-0.17209"/>
      <bbk:Obs TIME_PERIOD="2025-04-02" OBS_VALUE="-3.46084" BBK_DIFF_A="-0.00913"/>
      <bbk:Obs TIME_PERIOD="2025-04-01" OBS_VALUE="-3.45171" BBK_DIFF_A="0.1477"/>
      <bbk:Obs TIME_PERIOD="2025-03-31" OBS_VALUE="-3.59941" BBK_DIFF_A="-0.12841"/>
      <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="-3.471" BBK_DIFF_A="0.04399"/>
      <bbk:Obs TIME_PERIOD="2025-03-27" OBS_VALUE="-3.51499" BBK_DIFF_A="-0.20261"/>
      <bbk:Obs TIME_PERIOD="2025-03-26" OBS_VALUE="-3.31238" BBK_DIFF_A="0.00384"/>
      <bbk:Obs TIME_PERIOD="2025-03-25" OBS_VALUE="-3.31622" BBK_DIFF_A="-0.03724"/>
      <bbk:Obs TIME_PERIOD="2025-03-24" OBS_VALUE="-3.27898" BBK_DIFF_A="-0.12365"/>
      <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="-3.15533" BBK_DIFF_A="-0.0105"/>
      <bbk:Obs TIME_PERIOD="2025-03-20" OBS_VALUE="-3.14483" BBK_DIFF_A="0.02831"/>
      <bbk:Obs TIME_PERIOD="2025-03-19" OBS_VALUE="-3.17314" BBK_DIFF_A="-0.03828"/>
      <bbk:Obs TIME_PERIOD="2025-03-18" OBS_VALUE="-3.13486" BBK_DIFF_A="-0.01665"/>
      <bbk:Obs TIME_PERIOD="2025-03-17" OBS_VALUE="-3.11821" BBK_DIFF_A="0.09595"/>
      <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="-3.21416" BBK_DIFF_A="-0.07848"/>
      <bbk:Obs TIME_PERIOD="2025-03-13" OBS_VALUE="-3.13568" BBK_DIFF_A="0.02711"/>
      <bbk:Obs TIME_PERIOD="2025-03-12" OBS_VALUE="-3.16279" BBK_DIFF_A="-0.06775"/>
      <bbk:Obs TIME_PERIOD="2025-03-11" OBS_VALUE="-3.09504" BBK_DIFF_A="-0.10078"/>
      <bbk:Obs TIME_PERIOD="2025-03-10" OBS_VALUE="-2.99426" BBK_DIFF_A="-0.14292"/>
      <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="-2.85134" BBK_DIFF_A="-0.03887"/>
      <bbk:Obs TIME_PERIOD="2025-03-06" OBS_VALUE="-2.81247" BBK_DIFF_A="0.24224"/>
      <bbk:Obs TIME_PERIOD="2025-03-05" OBS_VALUE="-3.05471" BBK_DIFF_A="0.05035"/>
      <bbk:Obs TIME_PERIOD="2025-03-04" OBS_VALUE="-3.10506" BBK_DIFF_A="-0.14477"/>
      <bbk:Obs TIME_PERIOD="2025-03-03" OBS_VALUE="-2.96029" BBK_DIFF_A="-0.02205"/>
      <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="-2.93824" BBK_DIFF_A="-0.15973"/>
      <bbk:Obs TIME_PERIOD="2025-02-27" OBS_VALUE="-2.77851" BBK_DIFF_A="-0.02044"/>
      <bbk:Obs TIME_PERIOD="2025-02-26" OBS_VALUE="-2.75807" BBK_DIFF_A="0.17248"/>
      <bbk:Obs TIME_PERIOD="2025-02-25" OBS_VALUE="-2.93055" BBK_DIFF_A="-0.19364"/>
      <bbk:Obs TIME_PERIOD="2025-02-24" OBS_VALUE="-2.73691" BBK_DIFF_A="-0.07517"/>
      <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="-2.66174" BBK_DIFF_A="-0.1122"/>
      <bbk:Obs TIME_PERIOD="2025-02-20" OBS_VALUE="-2.54954" BBK_DIFF_A="0.04953"/>
      <bbk:Obs TIME_PERIOD="2025-02-19" OBS_VALUE="-2.59907" BBK_DIFF_A="-0.10531"/>
      <bbk:Obs TIME_PERIOD="2025-02-18" OBS_VALUE="-2.49376" BBK_DIFF_A="-0.06895"/>
      <bbk:Obs TIME_PERIOD="2025-02-17" OBS_VALUE="-2.42481" BBK_DIFF_A="0.09279"/>
      <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="-2.5176" BBK_DIFF_A="-0.08393"/>
      <bbk:Obs TIME_PERIOD="2025-02-13" OBS_VALUE="-2.43367" BBK_DIFF_A="0.12903"/>
      <bbk:Obs TIME_PERIOD="2025-02-12" OBS_VALUE="-2.5627" BBK_DIFF_A="-0.03027"/>
      <bbk:Obs TIME_PERIOD="2025-02-11" OBS_VALUE="-2.53243" BBK_DIFF_A="1.5E-4"/>
      <bbk:Obs TIME_PERIOD="2025-02-10" OBS_VALUE="-2.53258" BBK_DIFF_A="-0.05659"/>
      <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="-2.47599" BBK_DIFF_A="-0.07518"/>
      <bbk:Obs TIME_PERIOD="2025-02-06" OBS_VALUE="-2.40081" BBK_DIFF_A="0.18654"/>
      <bbk:Obs TIME_PERIOD="2025-02-05" OBS_VALUE="-2.58735" BBK_DIFF_A="-0.17061"/>
      <bbk:Obs TIME_PERIOD="2025-02-04" OBS_VALUE="-2.41674" BBK_DIFF_A="0.14356"/>
      <bbk:Obs TIME_PERIOD="2025-02-03" OBS_VALUE="-2.5603" BBK_DIFF_A="-0.05418"/>
      <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="-2.50612" BBK_DIFF_A="-0.26751"/>
      <bbk:Obs TIME_PERIOD="2025-01-30" OBS_VALUE="-2.23861" BBK_DIFF_A="-0.05712"/>
      <bbk:Obs TIME_PERIOD="2025-01-29" OBS_VALUE="-2.18149" BBK_DIFF_A="-0.0073"/>
      <bbk:Obs TIME_PERIOD="2025-01-28" OBS_VALUE="-2.17419" BBK_DIFF_A="0.01493"/>
      <bbk:Obs TIME_PERIOD="2025-01-27" OBS_VALUE="-2.18912" BBK_DIFF_A="0.00201"/>
      <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="-2.19113" BBK_DIFF_A="0.05434"/>
      <bbk:Obs TIME_PERIOD="2025-01-23" OBS_VALUE="-2.24547" BBK_DIFF_A="-0.03285"/>
      <bbk:Obs TIME_PERIOD="2025-01-22" OBS_VALUE="-2.21262" BBK_DIFF_A="-0.22968"/>
      <bbk:Obs TIME_PERIOD="2025-01-21" OBS_VALUE="-1.98294" BBK_DIFF_A="0.12665"/>
      <bbk:Obs TIME_PERIOD="2025-01-20" OBS_VALUE="-2.10959" BBK_DIFF_A="-0.07892"/>
      <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="-2.03067" BBK_DIFF_A="0.25773"/>
      <bbk:Obs TIME_PERIOD="2025-01-16" OBS_VALUE="-2.2884" BBK_DIFF_A="-0.62454"/>
      <bbk:Obs TIME_PERIOD="2025-01-15" OBS_VALUE="-1.66386" BBK_DIFF_A="0.06088"/>
      <bbk:Obs TIME_PERIOD="2025-01-14" OBS_VALUE="-1.72474" BBK_DIFF_A="0.54729"/>
      <bbk:Obs TIME_PERIOD="2025-01-13" OBS_VALUE="-2.27203" BBK_DIFF_A="-2.43553"/>
      <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="0.1635" BBK_DIFF_A="1.94528"/>
      <bbk:Obs TIME_PERIOD="2025-01-09" OBS_VALUE="-1.78178" BBK_DIFF_A="-0.34264"/>
      <bbk:Obs TIME_PERIOD="2025-01-08" OBS_VALUE="-1.43914" BBK_DIFF_A="0.0085"/>
      <bbk:Obs TIME_PERIOD="2025-01-07" OBS_VALUE="-1.44764" BBK_DIFF_A="-0.21982"/>
      <bbk:Obs TIME_PERIOD="2025-01-06" OBS_VALUE="-1.22782" BBK_DIFF_A="0.31975"/>
      <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="-1.54757" BBK_DIFF_A="1.04754"/>
      <bbk:Obs TIME_PERIOD="2025-01-02" OBS_VALUE="-2.59511" BBK_DIFF_A="-0.28158"/>
      <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="-2.31353" BBK_DIFF_A="-0.08768"/>
      <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="-2.22585" BBK_DIFF_A="0.05259"/>
      <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="-2.27844" BBK_DIFF_A="0.08406"/>
      <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="-2.3625" BBK_DIFF_A="-0.08638"/>
      <bbk:Obs TIME_PERIOD="2024-12-19" OBS_VALUE="-2.27612" BBK_DIFF_A="0.02549"/>
      <bbk:Obs TIME_PERIOD="2024-12-18" OBS_VALUE="-2.30161" BBK_DIFF_A="0.04272"/>
      <bbk:Obs TIME_PERIOD="2024-12-17" OBS_VALUE="-2.34433" BBK_DIFF_A="0.02313"/>
      <bbk:Obs TIME_PERIOD="2024-12-16" OBS_VALUE="-2.36746" BBK_DIFF_A="0.0613"/>
      <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="-2.42876" BBK_DIFF_A="0.17014"/>
      <bbk:Obs TIME_PERIOD="2024-12-12" OBS_VALUE="-2.5989" BBK_DIFF_A="5.00545"/>
      <bbk:Obs TIME_PERIOD="2024-12-11" OBS_VALUE="-7.60435" BBK_DIFF_A="-0.23773"/>
      <bbk:Obs TIME_PERIOD="2024-12-10" OBS_VALUE="-7.36662" BBK_DIFF_A="-1.08146"/>
      <bbk:Obs TIME_PERIOD="2024-12-09" OBS_VALUE="-6.28516" BBK_DIFF_A="-0.68012"/>
      <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="-5.60504" BBK_DIFF_A="-1.11168"/>
      <bbk:Obs TIME_PERIOD="2024-12-05" OBS_VALUE="-4.49336" BBK_DIFF_A="0.05282"/>
      <bbk:Obs TIME_PERIOD="2024-12-04" OBS_VALUE="-4.54618" BBK_DIFF_A="-0.68859"/>
      <bbk:Obs TIME_PERIOD="2024-12-03" OBS_VALUE="-3.85759" BBK_DIFF_A="0.64674"/>
      <bbk:Obs TIME_PERIOD="2024-12-02" OBS_VALUE="-4.50433" BBK_DIFF_A="-0.43999"/>
      <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="-4.06434" BBK_DIFF_A="0.76857"/>
      <bbk:Obs TIME_PERIOD="2024-11-28" OBS_VALUE="-4.83291" BBK_DIFF_A="-0.11156"/>
      <bbk:Obs TIME_PERIOD="2024-11-27" OBS_VALUE="-4.72135" BBK_DIFF_A="0.17668"/>
      <bbk:Obs TIME_PERIOD="2024-11-26" OBS_VALUE="-4.89803" BBK_DIFF_A="-0.49014"/>
      <bbk:Obs TIME_PERIOD="2024-11-25" OBS_VALUE="-4.40789" BBK_DIFF_A="0.04366"/>
      <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="-4.45155" BBK_DIFF_A="-0.24533"/>
      <bbk:Obs TIME_PERIOD="2024-11-21" OBS_VALUE="-4.20622" BBK_DIFF_A="-1.1812"/>
      <bbk:Obs TIME_PERIOD="2024-11-20" OBS_VALUE="-3.02502" BBK_DIFF_A="-0.20367"/>
      <bbk:Obs TIME_PERIOD="2024-11-19" OBS_VALUE="-2.82135" BBK_DIFF_A="0.06058"/>
      <bbk:Obs TIME_PERIOD="2024-11-18" OBS_VALUE="-2.88193" BBK_DIFF_A="-0.13863"/>
      <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="-2.7433" BBK_DIFF_A="0.68427"/>
      <bbk:Obs TIME_PERIOD="2024-11-14" OBS_VALUE="-3.42757" BBK_DIFF_A="-0.76834"/>
      <bbk:Obs TIME_PERIOD="2024-11-13" OBS_VALUE="-2.65923" BBK_DIFF_A="0.2784"/>
      <bbk:Obs TIME_PERIOD="2024-11-12" OBS_VALUE="-2.93763" BBK_DIFF_A="0.05395"/>
      <bbk:Obs TIME_PERIOD="2024-11-11" OBS_VALUE="-2.99158" BBK_DIFF_A="0.8067"/>
      <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="-3.79828" BBK_DIFF_A="0.15276"/>
      <bbk:Obs TIME_PERIOD="2024-11-07" OBS_VALUE="-3.95104" BBK_DIFF_A="-0.18001"/>
      <bbk:Obs TIME_PERIOD="2024-11-06" OBS_VALUE="-3.77103" BBK_DIFF_A="-0.39376"/>
      <bbk:Obs TIME_PERIOD="2024-11-05" OBS_VALUE="-3.37727" BBK_DIFF_A="-0.21781"/>
      <bbk:Obs TIME_PERIOD="2024-11-04" OBS_VALUE="-3.15946" BBK_DIFF_A="-0.13564"/>
      <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="-3.02382" BBK_DIFF_A="0.29182"/>
      <bbk:Obs TIME_PERIOD="2024-10-31" OBS_VALUE="-3.31564" BBK_DIFF_A="-0.49283"/>
      <bbk:Obs TIME_PERIOD="2024-10-30" OBS_VALUE="-2.82281" BBK_DIFF_A="-0.01772"/>
      <bbk:Obs TIME_PERIOD="2024-10-29" OBS_VALUE="-2.80509" BBK_DIFF_A="-0.24768"/>
      <bbk:Obs TIME_PERIOD="2024-10-28" OBS_VALUE="-2.55741" BBK_DIFF_A="-0.09892"/>
      <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="-2.45849" BBK_DIFF_A="-0.04039"/>
      <bbk:Obs TIME_PERIOD="2024-10-24" OBS_VALUE="-2.4181" BBK_DIFF_A="0.07796"/>
      <bbk:Obs TIME_PERIOD="2024-10-23" OBS_VALUE="-2.49606" BBK_DIFF_A="-0.17867"/>
      <bbk:Obs TIME_PERIOD="2024-10-22" OBS_VALUE="-2.31739" BBK_DIFF_A="0.46528"/>
      <bbk:Obs TIME_PERIOD="2024-10-21" OBS_VALUE="-2.78267" BBK_DIFF_A="-0.19875"/>
      <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="-2.58392" BBK_DIFF_A="-0.80224"/>
      <bbk:Obs TIME_PERIOD="2024-10-17" OBS_VALUE="-1.78168" BBK_DIFF_A="0.63809"/>
      <bbk:Obs TIME_PERIOD="2024-10-16" OBS_VALUE="-2.41977" BBK_DIFF_A="-0.54827"/>
      <bbk:Obs TIME_PERIOD="2024-10-15" OBS_VALUE="-1.8715" BBK_DIFF_A="-0.09345"/>
      <bbk:Obs TIME_PERIOD="2024-10-14" OBS_VALUE="-1.77805" BBK_DIFF_A="-0.20981"/>
      <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="-1.56824" BBK_DIFF_A="0.07709"/>
      <bbk:Obs TIME_PERIOD="2024-10-10" OBS_VALUE="-1.64533" BBK_DIFF_A="-0.00806"/>
      <bbk:Obs TIME_PERIOD="2024-10-09" OBS_VALUE="-1.63727" BBK_DIFF_A="-0.08937"/>
      <bbk:Obs TIME_PERIOD="2024-10-08" OBS_VALUE="-1.5479" BBK_DIFF_A="0.07502"/>
      <bbk:Obs TIME_PERIOD="2024-10-07" OBS_VALUE="-1.62292" BBK_DIFF_A="0.23804"/>
      <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="-1.86096" BBK_DIFF_A="-0.09332"/>
      <bbk:Obs TIME_PERIOD="2024-10-03" OBS_VALUE="-1.76764" BBK_DIFF_A="0.1183"/>
      <bbk:Obs TIME_PERIOD="2024-10-02" OBS_VALUE="-1.88594" BBK_DIFF_A="0.06877"/>
      <bbk:Obs TIME_PERIOD="2024-10-01" OBS_VALUE="-1.95471" BBK_DIFF_A="-0.07081"/>
      <bbk:Obs TIME_PERIOD="2024-09-30" OBS_VALUE="-1.8839" BBK_DIFF_A="0.11811"/>
      <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="-2.00201" BBK_DIFF_A="-0.01977"/>
      <bbk:Obs TIME_PERIOD="2024-09-26" OBS_VALUE="-1.98224" BBK_DIFF_A="-0.12474"/>
      <bbk:Obs TIME_PERIOD="2024-09-25" OBS_VALUE="-1.8575" BBK_DIFF_A="0.08314"/>
      <bbk:Obs TIME_PERIOD="2024-09-24" OBS_VALUE="-1.94064" BBK_DIFF_A="-0.07332"/>
      <bbk:Obs TIME_PERIOD="2024-09-23" OBS_VALUE="-1.86732" BBK_DIFF_A="-0.81861"/>
      <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="-1.04871" BBK_DIFF_A="0.06218"/>
      <bbk:Obs TIME_PERIOD="2024-09-19" OBS_VALUE="-1.11089" BBK_DIFF_A="1.54089"/>
      <bbk:Obs TIME_PERIOD="2024-09-18" OBS_VALUE="-2.65178" BBK_DIFF_A="0.18197"/>
      <bbk:Obs TIME_PERIOD="2024-09-17" OBS_VALUE="-2.83375" BBK_DIFF_A="-0.05906"/>
      <bbk:Obs TIME_PERIOD="2024-09-16" OBS_VALUE="-2.77469" BBK_DIFF_A="0.03942"/>
      <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="-2.81411" BBK_DIFF_A="-0.00354"/>
      <bbk:Obs TIME_PERIOD="2024-09-12" OBS_VALUE="-2.81057" BBK_DIFF_A="-0.00647"/>
      <bbk:Obs TIME_PERIOD="2024-09-11" OBS_VALUE="-2.8041" BBK_DIFF_A="-0.12354"/>
      <bbk:Obs TIME_PERIOD="2024-09-10" OBS_VALUE="-2.68056" BBK_DIFF_A="-0.08432"/>
      <bbk:Obs TIME_PERIOD="2024-09-09" OBS_VALUE="-2.59624" BBK_DIFF_A="-0.01109"/>
      <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="-2.58515" BBK_DIFF_A="-0.92456"/>
      <bbk:Obs TIME_PERIOD="2024-09-05" OBS_VALUE="-1.66059" BBK_DIFF_A="-0.28758"/>
      <bbk:Obs TIME_PERIOD="2024-09-04" OBS_VALUE="-1.37301" BBK_DIFF_A="-0.21026"/>
      <bbk:Obs TIME_PERIOD="2024-09-03" OBS_VALUE="-1.16275" BBK_DIFF_A="0.04423"/>
      <bbk:Obs TIME_PERIOD="2024-09-02" OBS_VALUE="-1.20698" BBK_DIFF_A="0.02769"/>
      <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="-1.23467" BBK_DIFF_A="0.02591"/>
      <bbk:Obs TIME_PERIOD="2024-08-29" OBS_VALUE="-1.26058" BBK_DIFF_A="0.00804"/>
      <bbk:Obs TIME_PERIOD="2024-08-28" OBS_VALUE="-1.26862" BBK_DIFF_A="-0.19582"/>
      <bbk:Obs TIME_PERIOD="2024-08-27" OBS_VALUE="-1.0728" BBK_DIFF_A="0.16197"/>
      <bbk:Obs TIME_PERIOD="2024-08-26" OBS_VALUE="-1.23477" BBK_DIFF_A="0.13912"/>
      <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="-1.37389" BBK_DIFF_A="-0.05741"/>
      <bbk:Obs TIME_PERIOD="2024-08-22" OBS_VALUE="-1.31648" BBK_DIFF_A="-0.00112"/>
      <bbk:Obs TIME_PERIOD="2024-08-21" OBS_VALUE="-1.31536" BBK_DIFF_A="-8.1E-4"/>
      <bbk:Obs TIME_PERIOD="2024-08-20" OBS_VALUE="-1.31455" BBK_DIFF_A="0.01873"/>
      <bbk:Obs TIME_PERIOD="2024-08-19" OBS_VALUE="-1.33328" BBK_DIFF_A="0.03611"/>
      <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="-1.36939" BBK_DIFF_A="0.18031"/>
      <bbk:Obs TIME_PERIOD="2024-08-15" OBS_VALUE="-1.5497" BBK_DIFF_A="-0.17004"/>
      <bbk:Obs TIME_PERIOD="2024-08-14" OBS_VALUE="-1.37966" BBK_DIFF_A="-0.22547"/>
      <bbk:Obs TIME_PERIOD="2024-08-13" OBS_VALUE="-1.15419" BBK_DIFF_A="0.55828"/>
      <bbk:Obs TIME_PERIOD="2024-08-12" OBS_VALUE="-1.71247" BBK_DIFF_A="0.48034"/>
      <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="-2.19281" BBK_DIFF_A="0.32012"/>
      <bbk:Obs TIME_PERIOD="2024-08-08" OBS_VALUE="-2.51293" BBK_DIFF_A="-0.30633"/>
      <bbk:Obs TIME_PERIOD="2024-08-07" OBS_VALUE="-2.2066" BBK_DIFF_A="0.12619"/>
      <bbk:Obs TIME_PERIOD="2024-08-06" OBS_VALUE="-2.33279" BBK_DIFF_A="0.1212"/>
      <bbk:Obs TIME_PERIOD="2024-08-05" OBS_VALUE="-2.45399" BBK_DIFF_A="-0.139"/>
      <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="-2.31499" BBK_DIFF_A="-0.07933"/>
      <bbk:Obs TIME_PERIOD="2024-08-01" OBS_VALUE="-2.23566" BBK_DIFF_A="-7.39794"/>
      <bbk:Obs TIME_PERIOD="2024-07-31" OBS_VALUE="5.16228" BBK_DIFF_A="7.27619"/>
      <bbk:Obs TIME_PERIOD="2024-07-30" OBS_VALUE="-2.11391" BBK_DIFF_A="0.01734"/>
      <bbk:Obs TIME_PERIOD="2024-07-29" OBS_VALUE="-2.13125" BBK_DIFF_A="-0.08158"/>
      <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="-2.04967" BBK_DIFF_A="0.10277"/>
      <bbk:Obs TIME_PERIOD="2024-07-25" OBS_VALUE="-2.15244" BBK_DIFF_A="-0.18357"/>
      <bbk:Obs TIME_PERIOD="2024-07-24" OBS_VALUE="-1.96887" BBK_DIFF_A="-0.14393"/>
      <bbk:Obs TIME_PERIOD="2024-07-23" OBS_VALUE="-1.82494" BBK_DIFF_A="0.019"/>
      <bbk:Obs TIME_PERIOD="2024-07-22" OBS_VALUE="-1.84394" BBK_DIFF_A="0.01285"/>
      <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="-1.85679" BBK_DIFF_A="-0.01532"/>
      <bbk:Obs TIME_PERIOD="2024-07-18" OBS_VALUE="-1.84147" BBK_DIFF_A="0.0119"/>
      <bbk:Obs TIME_PERIOD="2024-07-17" OBS_VALUE="-1.85337" BBK_DIFF_A="-0.01175"/>
      <bbk:Obs TIME_PERIOD="2024-07-16" OBS_VALUE="-1.84162" BBK_DIFF_A="-6.58824"/>
      <bbk:Obs TIME_PERIOD="2024-07-15" OBS_VALUE="4.74662" BBK_DIFF_A="-0.13747"/>
      <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="4.88409" BBK_DIFF_A="-1.33142"/>
      <bbk:Obs TIME_PERIOD="2024-07-11" OBS_VALUE="6.21551" BBK_DIFF_A="-0.29042"/>
      <bbk:Obs TIME_PERIOD="2024-07-10" OBS_VALUE="6.50593" BBK_DIFF_A="-0.25708"/>
      <bbk:Obs TIME_PERIOD="2024-07-09" OBS_VALUE="6.76301" BBK_DIFF_A="0.71708"/>
      <bbk:Obs TIME_PERIOD="2024-07-08" OBS_VALUE="6.04593" BBK_DIFF_A="2.73734"/>
      <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="3.30859" BBK_DIFF_A="-16.2632"/>
      <bbk:Obs TIME_PERIOD="2024-07-04" OBS_VALUE="19.57179" BBK_DIFF_A="21.04347"/>
      <bbk:Obs TIME_PERIOD="2024-07-03" OBS_VALUE="-1.47168" BBK_DIFF_A="0.01928"/>
      <bbk:Obs TIME_PERIOD="2024-07-02" OBS_VALUE="-1.49096" BBK_DIFF_A="-0.0297"/>
      <bbk:Obs TIME_PERIOD="2024-07-01" OBS_VALUE="-1.46126" BBK_DIFF_A="0.08307"/>
      <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="-1.54433" BBK_DIFF_A="0.0026"/>
      <bbk:Obs TIME_PERIOD="2024-06-27" OBS_VALUE="-1.54693" BBK_DIFF_A="0.09107"/>
      <bbk:Obs TIME_PERIOD="2024-06-26" OBS_VALUE="-1.638" BBK_DIFF_A="0.02501"/>
      <bbk:Obs TIME_PERIOD="2024-06-25" OBS_VALUE="-1.66301" BBK_DIFF_A="0.00232"/>
      <bbk:Obs TIME_PERIOD="2024-06-24" OBS_VALUE="-1.66533" BBK_DIFF_A="-0.04194"/>
      <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="-1.62339" BBK_DIFF_A="-0.08653"/>
      <bbk:Obs TIME_PERIOD="2024-06-20" OBS_VALUE="-1.53686" BBK_DIFF_A="0.0547"/>
      <bbk:Obs TIME_PERIOD="2024-06-19" OBS_VALUE="-1.59156" BBK_DIFF_A="-0.01816"/>
      <bbk:Obs TIME_PERIOD="2024-06-18" OBS_VALUE="-1.5734" BBK_DIFF_A="-0.0683"/>
      <bbk:Obs TIME_PERIOD="2024-06-17" OBS_VALUE="-1.5051" BBK_DIFF_A="0.17247"/>
      <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="-1.67757" BBK_DIFF_A="-0.69487"/>
      <bbk:Obs TIME_PERIOD="2024-06-13" OBS_VALUE="-0.9827" BBK_DIFF_A="-20.95693"/>
      <bbk:Obs TIME_PERIOD="2024-06-12" OBS_VALUE="19.97423" BBK_DIFF_A="-0.02577"/>
      <bbk:Obs TIME_PERIOD="2024-06-11" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2024-06-10" OBS_VALUE="20.0" BBK_DIFF_A="0.31329"/>
      <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="19.68671" BBK_DIFF_A="-0.073"/>
      <bbk:Obs TIME_PERIOD="2024-06-06" OBS_VALUE="19.75971" BBK_DIFF_A="0.26563"/>
      <bbk:Obs TIME_PERIOD="2024-06-05" OBS_VALUE="19.49408" BBK_DIFF_A="-0.05308"/>
      <bbk:Obs TIME_PERIOD="2024-06-04" OBS_VALUE="19.54716" BBK_DIFF_A="-0.43591"/>
      <bbk:Obs TIME_PERIOD="2024-06-03" OBS_VALUE="19.98307" BBK_DIFF_A="-0.01693"/>
      <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="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2024-05-30" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2024-05-29" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2024-05-28" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2024-05-27" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <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="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2024-05-23" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2024-05-22" OBS_VALUE="20.0" BBK_DIFF_A="0.02687"/>
      <bbk:Obs TIME_PERIOD="2024-05-21" OBS_VALUE="19.97313" BBK_DIFF_A="-0.02687"/>
      <bbk:Obs TIME_PERIOD="2024-05-20" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <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="20.0" BBK_DIFF_A="0.28186"/>
      <bbk:Obs TIME_PERIOD="2024-05-16" OBS_VALUE="19.71814" BBK_DIFF_A="-0.28186"/>
      <bbk:Obs TIME_PERIOD="2024-05-15" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2024-05-14" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2024-05-13" OBS_VALUE="20.0" BBK_DIFF_A="12.52011"/>
      <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="7.47989" BBK_DIFF_A="-12.52011"/>
      <bbk:Obs TIME_PERIOD="2024-05-09" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2024-05-08" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2024-05-07" OBS_VALUE="20.0" BBK_DIFF_A="12.07048"/>
      <bbk:Obs TIME_PERIOD="2024-05-06" OBS_VALUE="7.92952" BBK_DIFF_A="-12.07048"/>
      <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="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2024-05-02" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2024-05-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2024-04-30" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2024-04-29" OBS_VALUE="20.0" BBK_DIFF_A="11.19054"/>
      <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="8.80946" BBK_DIFF_A="0.66661"/>
      <bbk:Obs TIME_PERIOD="2024-04-25" OBS_VALUE="8.14285" BBK_DIFF_A="-0.36186"/>
      <bbk:Obs TIME_PERIOD="2024-04-24" OBS_VALUE="8.50471" BBK_DIFF_A="0.02711"/>
      <bbk:Obs TIME_PERIOD="2024-04-23" OBS_VALUE="8.4776" BBK_DIFF_A="-0.12164"/>
      <bbk:Obs TIME_PERIOD="2024-04-22" OBS_VALUE="8.59924" BBK_DIFF_A="-0.60795"/>
      <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="9.20719" BBK_DIFF_A="0.17089"/>
      <bbk:Obs TIME_PERIOD="2024-04-18" OBS_VALUE="9.0363" BBK_DIFF_A="0.5544"/>
      <bbk:Obs TIME_PERIOD="2024-04-17" OBS_VALUE="8.4819" BBK_DIFF_A="0.4574"/>
      <bbk:Obs TIME_PERIOD="2024-04-16" OBS_VALUE="8.0245" BBK_DIFF_A="-0.06415"/>
      <bbk:Obs TIME_PERIOD="2024-04-15" OBS_VALUE="8.08865" BBK_DIFF_A="-0.02742"/>
      <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="8.11607" BBK_DIFF_A="-0.7373"/>
      <bbk:Obs TIME_PERIOD="2024-04-11" OBS_VALUE="8.85337" BBK_DIFF_A="0.68076"/>
      <bbk:Obs TIME_PERIOD="2024-04-10" OBS_VALUE="8.17261" BBK_DIFF_A="-0.23153"/>
      <bbk:Obs TIME_PERIOD="2024-04-09" OBS_VALUE="8.40414" BBK_DIFF_A="-0.24651"/>
      <bbk:Obs TIME_PERIOD="2024-04-08" OBS_VALUE="8.65065" BBK_DIFF_A="-0.38236"/>
      <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="9.03301" BBK_DIFF_A="1.1023"/>
      <bbk:Obs TIME_PERIOD="2024-04-04" OBS_VALUE="7.93071" BBK_DIFF_A="-0.33641"/>
      <bbk:Obs TIME_PERIOD="2024-04-03" OBS_VALUE="8.26712" BBK_DIFF_A="-0.87633"/>
      <bbk:Obs TIME_PERIOD="2024-04-02" OBS_VALUE="9.14345" BBK_DIFF_A="0.16134"/>
      <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="8.98211" BBK_DIFF_A="-0.10325"/>
      <bbk:Obs TIME_PERIOD="2024-03-27" OBS_VALUE="9.08536" BBK_DIFF_A="-0.1455"/>
      <bbk:Obs TIME_PERIOD="2024-03-26" OBS_VALUE="9.23086" BBK_DIFF_A="0.159"/>
      <bbk:Obs TIME_PERIOD="2024-03-25" OBS_VALUE="9.07186" BBK_DIFF_A="0.57245"/>
      <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="8.49941" BBK_DIFF_A="0.12452"/>
      <bbk:Obs TIME_PERIOD="2024-03-21" OBS_VALUE="8.37489" BBK_DIFF_A="-0.59285"/>
      <bbk:Obs TIME_PERIOD="2024-03-20" OBS_VALUE="8.96774" BBK_DIFF_A="0.04663"/>
      <bbk:Obs TIME_PERIOD="2024-03-19" OBS_VALUE="8.92111" BBK_DIFF_A="-0.08245"/>
      <bbk:Obs TIME_PERIOD="2024-03-18" OBS_VALUE="9.00356" BBK_DIFF_A="0.49441"/>
      <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="8.50915" BBK_DIFF_A="0.65143"/>
      <bbk:Obs TIME_PERIOD="2024-03-14" OBS_VALUE="7.85772" BBK_DIFF_A="0.30099"/>
      <bbk:Obs TIME_PERIOD="2024-03-13" OBS_VALUE="7.55673" BBK_DIFF_A="0.06655"/>
      <bbk:Obs TIME_PERIOD="2024-03-12" OBS_VALUE="7.49018" BBK_DIFF_A="0.7108"/>
      <bbk:Obs TIME_PERIOD="2024-03-11" OBS_VALUE="6.77938" BBK_DIFF_A="0.23826"/>
      <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="6.54112" BBK_DIFF_A="0.23295"/>
      <bbk:Obs TIME_PERIOD="2024-03-07" OBS_VALUE="6.30817" BBK_DIFF_A="0.6886"/>
      <bbk:Obs TIME_PERIOD="2024-03-06" OBS_VALUE="5.61957" BBK_DIFF_A="0.17386"/>
      <bbk:Obs TIME_PERIOD="2024-03-05" OBS_VALUE="5.44571" BBK_DIFF_A="-0.42588"/>
      <bbk:Obs TIME_PERIOD="2024-03-04" OBS_VALUE="5.87159" BBK_DIFF_A="0.18419"/>
      <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="5.6874" BBK_DIFF_A="-0.28726"/>
      <bbk:Obs TIME_PERIOD="2024-02-29" OBS_VALUE="5.97466" BBK_DIFF_A="-0.50708"/>
      <bbk:Obs TIME_PERIOD="2024-02-28" OBS_VALUE="6.48174" BBK_DIFF_A="0.30305"/>
      <bbk:Obs TIME_PERIOD="2024-02-27" OBS_VALUE="6.17869" BBK_DIFF_A="-0.01893"/>
      <bbk:Obs TIME_PERIOD="2024-02-26" OBS_VALUE="6.19762" BBK_DIFF_A="10.7119"/>
      <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="-4.51428" BBK_DIFF_A="0.62058"/>
      <bbk:Obs TIME_PERIOD="2024-02-22" OBS_VALUE="-5.13486" BBK_DIFF_A="-1.94352"/>
      <bbk:Obs TIME_PERIOD="2024-02-21" OBS_VALUE="-3.19134" BBK_DIFF_A="2.45788"/>
      <bbk:Obs TIME_PERIOD="2024-02-20" OBS_VALUE="-5.64922" BBK_DIFF_A="-1.2934"/>
      <bbk:Obs TIME_PERIOD="2024-02-19" OBS_VALUE="-4.35582" BBK_DIFF_A="-2.87722"/>
      <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="-1.4786" BBK_DIFF_A="-0.12349"/>
      <bbk:Obs TIME_PERIOD="2024-02-15" OBS_VALUE="-1.35511" BBK_DIFF_A="0.07353"/>
      <bbk:Obs TIME_PERIOD="2024-02-14" OBS_VALUE="-1.42864" BBK_DIFF_A="0.78899"/>
      <bbk:Obs TIME_PERIOD="2024-02-13" OBS_VALUE="-2.21763" BBK_DIFF_A="-0.40892"/>
      <bbk:Obs TIME_PERIOD="2024-02-12" OBS_VALUE="-1.80871" BBK_DIFF_A="0.03516"/>
      <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="-1.84387" BBK_DIFF_A="0.12412"/>
      <bbk:Obs TIME_PERIOD="2024-02-08" OBS_VALUE="-1.96799" BBK_DIFF_A="0.16034"/>
      <bbk:Obs TIME_PERIOD="2024-02-07" OBS_VALUE="-2.12833" BBK_DIFF_A="-0.00369"/>
      <bbk:Obs TIME_PERIOD="2024-02-06" OBS_VALUE="-2.12464" BBK_DIFF_A="17.87536"/>
      <bbk:Obs TIME_PERIOD="2024-02-05" OBS_VALUE="-20.0" BBK_DIFF_A="-17.29231"/>
      <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="-2.70769" BBK_DIFF_A="-0.04211"/>
      <bbk:Obs TIME_PERIOD="2024-02-01" OBS_VALUE="-2.66558" BBK_DIFF_A="-0.15658"/>
      <bbk:Obs TIME_PERIOD="2024-01-31" OBS_VALUE="-2.509" BBK_DIFF_A="-3.18364"/>
      <bbk:Obs TIME_PERIOD="2024-01-30" OBS_VALUE="0.67464" BBK_DIFF_A="-0.39597"/>
      <bbk:Obs TIME_PERIOD="2024-01-29" OBS_VALUE="1.07061" BBK_DIFF_A="-0.27051"/>
      <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="1.34112" BBK_DIFF_A="-0.42836"/>
      <bbk:Obs TIME_PERIOD="2024-01-25" OBS_VALUE="1.76948" BBK_DIFF_A="-0.39472"/>
      <bbk:Obs TIME_PERIOD="2024-01-24" OBS_VALUE="2.1642" BBK_DIFF_A="-0.50639"/>
      <bbk:Obs TIME_PERIOD="2024-01-23" OBS_VALUE="2.67059" BBK_DIFF_A="0.62241"/>
      <bbk:Obs TIME_PERIOD="2024-01-22" OBS_VALUE="2.04818" BBK_DIFF_A="-0.14812"/>
      <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="2.1963" BBK_DIFF_A="0.17345"/>
      <bbk:Obs TIME_PERIOD="2024-01-18" OBS_VALUE="2.02285" BBK_DIFF_A="0.25072"/>
      <bbk:Obs TIME_PERIOD="2024-01-17" OBS_VALUE="1.77213" BBK_DIFF_A="0.10292"/>
      <bbk:Obs TIME_PERIOD="2024-01-16" OBS_VALUE="1.66921" BBK_DIFF_A="-0.26453"/>
      <bbk:Obs TIME_PERIOD="2024-01-15" OBS_VALUE="1.93374" BBK_DIFF_A="0.07923"/>
      <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="1.85451" BBK_DIFF_A="0.30928"/>
      <bbk:Obs TIME_PERIOD="2024-01-11" OBS_VALUE="1.54523" BBK_DIFF_A="3.26213"/>
      <bbk:Obs TIME_PERIOD="2024-01-10" OBS_VALUE="-1.7169" BBK_DIFF_A="0.67737"/>
      <bbk:Obs TIME_PERIOD="2024-01-09" OBS_VALUE="-2.39427" BBK_DIFF_A="-0.06413"/>
      <bbk:Obs TIME_PERIOD="2024-01-08" OBS_VALUE="-2.33014" BBK_DIFF_A="-0.0399"/>
      <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="-2.29024" BBK_DIFF_A="0.14523"/>
      <bbk:Obs TIME_PERIOD="2024-01-04" OBS_VALUE="-2.43547" BBK_DIFF_A="-3.03933"/>
      <bbk:Obs TIME_PERIOD="2024-01-03" OBS_VALUE="0.60386" BBK_DIFF_A="-0.298"/>
      <bbk:Obs TIME_PERIOD="2024-01-02" OBS_VALUE="0.90186" BBK_DIFF_A="0.00504"/>
      <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="0.89682" BBK_DIFF_A="0.09882"/>
      <bbk:Obs TIME_PERIOD="2023-12-28" OBS_VALUE="0.798" BBK_DIFF_A="-0.109"/>
      <bbk:Obs TIME_PERIOD="2023-12-27" OBS_VALUE="0.907" BBK_DIFF_A="0.48753"/>
      <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="0.41947" BBK_DIFF_A="0.05226"/>
      <bbk:Obs TIME_PERIOD="2023-12-21" OBS_VALUE="0.36721" BBK_DIFF_A="-1.27603"/>
      <bbk:Obs TIME_PERIOD="2023-12-20" OBS_VALUE="1.64324" BBK_DIFF_A="0.07079"/>
      <bbk:Obs TIME_PERIOD="2023-12-19" OBS_VALUE="1.57245" BBK_DIFF_A="-0.14114"/>
      <bbk:Obs TIME_PERIOD="2023-12-18" OBS_VALUE="1.71359" BBK_DIFF_A="-0.25844"/>
      <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="1.97203" BBK_DIFF_A="0.02345"/>
      <bbk:Obs TIME_PERIOD="2023-12-14" OBS_VALUE="1.94858" BBK_DIFF_A="1.04749"/>
      <bbk:Obs TIME_PERIOD="2023-12-13" OBS_VALUE="0.90109" BBK_DIFF_A="-0.49641"/>
      <bbk:Obs TIME_PERIOD="2023-12-12" OBS_VALUE="1.3975" BBK_DIFF_A="-1.38772"/>
      <bbk:Obs TIME_PERIOD="2023-12-11" OBS_VALUE="2.78522" BBK_DIFF_A="-0.13374"/>
      <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="2.91896" BBK_DIFF_A="-0.32268"/>
      <bbk:Obs TIME_PERIOD="2023-12-07" OBS_VALUE="3.24164" BBK_DIFF_A="0.48399"/>
      <bbk:Obs TIME_PERIOD="2023-12-06" OBS_VALUE="2.75765" BBK_DIFF_A="0.60023"/>
      <bbk:Obs TIME_PERIOD="2023-12-05" OBS_VALUE="2.15742" BBK_DIFF_A="-0.08987"/>
      <bbk:Obs TIME_PERIOD="2023-12-04" OBS_VALUE="2.24729" BBK_DIFF_A="-0.66766"/>
      <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="2.91495" BBK_DIFF_A="-0.02218"/>
      <bbk:Obs TIME_PERIOD="2023-11-30" OBS_VALUE="2.93713" BBK_DIFF_A="-2.89077"/>
      <bbk:Obs TIME_PERIOD="2023-11-29" OBS_VALUE="5.8279" BBK_DIFF_A="-13.60294"/>
      <bbk:Obs TIME_PERIOD="2023-11-28" OBS_VALUE="19.43084" BBK_DIFF_A="-0.2844"/>
      <bbk:Obs TIME_PERIOD="2023-11-27" OBS_VALUE="19.71524" BBK_DIFF_A="-0.27355"/>
      <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="19.98879" BBK_DIFF_A="0.16911"/>
      <bbk:Obs TIME_PERIOD="2023-11-23" OBS_VALUE="19.81968" BBK_DIFF_A="-0.18032"/>
      <bbk:Obs TIME_PERIOD="2023-11-22" OBS_VALUE="20.0" BBK_DIFF_A="0.71308"/>
      <bbk:Obs TIME_PERIOD="2023-11-21" OBS_VALUE="19.28692" BBK_DIFF_A="0.02596"/>
      <bbk:Obs TIME_PERIOD="2023-11-20" OBS_VALUE="19.26096" BBK_DIFF_A="14.751"/>
      <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="4.50996" BBK_DIFF_A="-14.91356"/>
      <bbk:Obs TIME_PERIOD="2023-11-16" OBS_VALUE="19.42352" BBK_DIFF_A="-0.03908"/>
      <bbk:Obs TIME_PERIOD="2023-11-15" OBS_VALUE="19.4626" BBK_DIFF_A="-0.30443"/>
      <bbk:Obs TIME_PERIOD="2023-11-14" OBS_VALUE="19.76703" BBK_DIFF_A="-0.07927"/>
      <bbk:Obs TIME_PERIOD="2023-11-13" OBS_VALUE="19.8463" BBK_DIFF_A="0.13992"/>
      <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="19.70638" BBK_DIFF_A="0.10817"/>
      <bbk:Obs TIME_PERIOD="2023-11-09" OBS_VALUE="19.59821" BBK_DIFF_A="17.79725"/>
      <bbk:Obs TIME_PERIOD="2023-11-08" OBS_VALUE="1.80096" BBK_DIFF_A="2.86665"/>
      <bbk:Obs TIME_PERIOD="2023-11-07" OBS_VALUE="-1.06569" BBK_DIFF_A="-6.91299"/>
      <bbk:Obs TIME_PERIOD="2023-11-06" OBS_VALUE="5.8473" BBK_DIFF_A="0.69317"/>
      <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="5.15413" BBK_DIFF_A="0.32725"/>
      <bbk:Obs TIME_PERIOD="2023-11-02" OBS_VALUE="4.82688" BBK_DIFF_A="-10.94318"/>
      <bbk:Obs TIME_PERIOD="2023-11-01" OBS_VALUE="15.77006" BBK_DIFF_A="10.33618"/>
      <bbk:Obs TIME_PERIOD="2023-10-31" OBS_VALUE="5.43388" BBK_DIFF_A="-12.28852"/>
      <bbk:Obs TIME_PERIOD="2023-10-30" OBS_VALUE="17.7224" BBK_DIFF_A="-2.2625"/>
      <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="19.9849" BBK_DIFF_A="-0.0151"/>
      <bbk:Obs TIME_PERIOD="2023-10-26" OBS_VALUE="20.0" BBK_DIFF_A="39.42858"/>
      <bbk:Obs TIME_PERIOD="2023-10-25" OBS_VALUE="-19.42858" BBK_DIFF_A="0.31489"/>
      <bbk:Obs TIME_PERIOD="2023-10-24" OBS_VALUE="-19.74347" BBK_DIFF_A="-0.2224"/>
      <bbk:Obs TIME_PERIOD="2023-10-23" OBS_VALUE="-19.52107" BBK_DIFF_A="-10.14676"/>
      <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="-9.37431" BBK_DIFF_A="-29.37431"/>
      <bbk:Obs TIME_PERIOD="2023-10-19" OBS_VALUE="20.0" BBK_DIFF_A="5.32743"/>
      <bbk:Obs TIME_PERIOD="2023-10-18" OBS_VALUE="14.67257" BBK_DIFF_A="12.4018"/>
      <bbk:Obs TIME_PERIOD="2023-10-17" OBS_VALUE="2.27077" BBK_DIFF_A="-0.17737"/>
      <bbk:Obs TIME_PERIOD="2023-10-16" OBS_VALUE="2.44814" BBK_DIFF_A="0.12224"/>
      <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="2.3259" BBK_DIFF_A="0.14813"/>
      <bbk:Obs TIME_PERIOD="2023-10-12" OBS_VALUE="2.17777" BBK_DIFF_A="-0.88865"/>
      <bbk:Obs TIME_PERIOD="2023-10-11" OBS_VALUE="3.06642" BBK_DIFF_A="-2.94741"/>
      <bbk:Obs TIME_PERIOD="2023-10-10" OBS_VALUE="6.01383" BBK_DIFF_A="0.94542"/>
      <bbk:Obs TIME_PERIOD="2023-10-09" OBS_VALUE="5.06841" BBK_DIFF_A="-4.02313"/>
      <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="9.09154" BBK_DIFF_A="3.4382"/>
      <bbk:Obs TIME_PERIOD="2023-10-05" OBS_VALUE="5.65334" BBK_DIFF_A="-12.89655"/>
      <bbk:Obs TIME_PERIOD="2023-10-04" OBS_VALUE="18.54989" BBK_DIFF_A="16.35549"/>
      <bbk:Obs TIME_PERIOD="2023-10-03" OBS_VALUE="2.1944" BBK_DIFF_A="0.04046"/>
      <bbk:Obs TIME_PERIOD="2023-10-02" OBS_VALUE="2.15394" BBK_DIFF_A="0.17428"/>
      <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="1.97966" BBK_DIFF_A="-1.3E-4"/>
      <bbk:Obs TIME_PERIOD="2023-09-28" OBS_VALUE="1.97979" BBK_DIFF_A="0.00901"/>
      <bbk:Obs TIME_PERIOD="2023-09-27" OBS_VALUE="1.97078" BBK_DIFF_A="0.07926"/>
      <bbk:Obs TIME_PERIOD="2023-09-26" OBS_VALUE="1.89152" BBK_DIFF_A="0.08561"/>
      <bbk:Obs TIME_PERIOD="2023-09-25" OBS_VALUE="1.80591" BBK_DIFF_A="-0.10261"/>
      <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="1.90852" BBK_DIFF_A="0.05821"/>
      <bbk:Obs TIME_PERIOD="2023-09-21" OBS_VALUE="1.85031" BBK_DIFF_A="-0.02698"/>
      <bbk:Obs TIME_PERIOD="2023-09-20" OBS_VALUE="1.87729" BBK_DIFF_A="-0.03655"/>
      <bbk:Obs TIME_PERIOD="2023-09-19" OBS_VALUE="1.91384" BBK_DIFF_A="-0.23512"/>
      <bbk:Obs TIME_PERIOD="2023-09-18" OBS_VALUE="2.14896" BBK_DIFF_A="-0.25236"/>
      <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="2.40132" BBK_DIFF_A="0.24908"/>
      <bbk:Obs TIME_PERIOD="2023-09-14" OBS_VALUE="2.15224" BBK_DIFF_A="-0.13258"/>
      <bbk:Obs TIME_PERIOD="2023-09-13" OBS_VALUE="2.28482" BBK_DIFF_A="0.28098"/>
      <bbk:Obs TIME_PERIOD="2023-09-12" OBS_VALUE="2.00384" BBK_DIFF_A="-0.12291"/>
      <bbk:Obs TIME_PERIOD="2023-09-11" OBS_VALUE="2.12675" BBK_DIFF_A="-0.05767"/>
      <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="2.18442" BBK_DIFF_A="-0.01949"/>
      <bbk:Obs TIME_PERIOD="2023-09-07" OBS_VALUE="2.20391" BBK_DIFF_A="0.11545"/>
      <bbk:Obs TIME_PERIOD="2023-09-06" OBS_VALUE="2.08846" BBK_DIFF_A="0.01289"/>
      <bbk:Obs TIME_PERIOD="2023-09-05" OBS_VALUE="2.07557" BBK_DIFF_A="0.0016"/>
      <bbk:Obs TIME_PERIOD="2023-09-04" OBS_VALUE="2.07397" BBK_DIFF_A="-0.07229"/>
      <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="2.14626" BBK_DIFF_A="-0.12154"/>
      <bbk:Obs TIME_PERIOD="2023-08-31" OBS_VALUE="2.2678" BBK_DIFF_A="-0.05545"/>
      <bbk:Obs TIME_PERIOD="2023-08-30" OBS_VALUE="2.32325" BBK_DIFF_A="-0.01257"/>
      <bbk:Obs TIME_PERIOD="2023-08-29" OBS_VALUE="2.33582" BBK_DIFF_A="0.1792"/>
      <bbk:Obs TIME_PERIOD="2023-08-28" OBS_VALUE="2.15662" BBK_DIFF_A="-0.26518"/>
      <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="2.4218" BBK_DIFF_A="0.08938"/>
      <bbk:Obs TIME_PERIOD="2023-08-24" OBS_VALUE="2.33242" BBK_DIFF_A="0.00947"/>
      <bbk:Obs TIME_PERIOD="2023-08-23" OBS_VALUE="2.32295" BBK_DIFF_A="0.11113"/>
      <bbk:Obs TIME_PERIOD="2023-08-22" OBS_VALUE="2.21182" BBK_DIFF_A="0.0578"/>
      <bbk:Obs TIME_PERIOD="2023-08-21" OBS_VALUE="2.15402" BBK_DIFF_A="-0.07213"/>
      <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="2.22615" BBK_DIFF_A="0.06456"/>
      <bbk:Obs TIME_PERIOD="2023-08-17" OBS_VALUE="2.16159" BBK_DIFF_A="-0.10549"/>
      <bbk:Obs TIME_PERIOD="2023-08-16" OBS_VALUE="2.26708" BBK_DIFF_A="0.07852"/>
      <bbk:Obs TIME_PERIOD="2023-08-15" OBS_VALUE="2.18856" BBK_DIFF_A="-0.16749"/>
      <bbk:Obs TIME_PERIOD="2023-08-14" OBS_VALUE="2.35605" BBK_DIFF_A="-0.09338"/>
      <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="2.44943" BBK_DIFF_A="-0.00743"/>
      <bbk:Obs TIME_PERIOD="2023-08-10" OBS_VALUE="2.45686" BBK_DIFF_A="-0.09544"/>
      <bbk:Obs TIME_PERIOD="2023-08-09" OBS_VALUE="2.5523" BBK_DIFF_A="0.05921"/>
      <bbk:Obs TIME_PERIOD="2023-08-08" OBS_VALUE="2.49309" BBK_DIFF_A="0.00978"/>
      <bbk:Obs TIME_PERIOD="2023-08-07" OBS_VALUE="2.48331" BBK_DIFF_A="0.08322"/>
      <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="2.40009" BBK_DIFF_A="-0.76206"/>
      <bbk:Obs TIME_PERIOD="2023-08-03" OBS_VALUE="3.16215" BBK_DIFF_A="0.48049"/>
      <bbk:Obs TIME_PERIOD="2023-08-02" OBS_VALUE="2.68166" BBK_DIFF_A="-0.09449"/>
      <bbk:Obs TIME_PERIOD="2023-08-01" OBS_VALUE="2.77615" BBK_DIFF_A="0.07924"/>
      <bbk:Obs TIME_PERIOD="2023-07-31" OBS_VALUE="2.69691" BBK_DIFF_A="-0.24461"/>
      <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="2.94152" BBK_DIFF_A="-0.40773"/>
      <bbk:Obs TIME_PERIOD="2023-07-27" OBS_VALUE="3.34925" BBK_DIFF_A="0.51095"/>
      <bbk:Obs TIME_PERIOD="2023-07-26" OBS_VALUE="2.8383" BBK_DIFF_A="-0.15699"/>
      <bbk:Obs TIME_PERIOD="2023-07-25" OBS_VALUE="2.99529" BBK_DIFF_A="-0.12642"/>
      <bbk:Obs TIME_PERIOD="2023-07-24" OBS_VALUE="3.12171" BBK_DIFF_A="0.09559"/>
      <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="3.02612" BBK_DIFF_A="0.05911"/>
      <bbk:Obs TIME_PERIOD="2023-07-20" OBS_VALUE="2.96701" BBK_DIFF_A="-0.45092"/>
      <bbk:Obs TIME_PERIOD="2023-07-19" OBS_VALUE="3.41793" BBK_DIFF_A="0.11858"/>
      <bbk:Obs TIME_PERIOD="2023-07-18" OBS_VALUE="3.29935" BBK_DIFF_A="0.10618"/>
      <bbk:Obs TIME_PERIOD="2023-07-17" OBS_VALUE="3.19317" BBK_DIFF_A="0.15433"/>
      <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="3.03884" BBK_DIFF_A="0.09025"/>
      <bbk:Obs TIME_PERIOD="2023-07-13" OBS_VALUE="2.94859" BBK_DIFF_A="0.09822"/>
      <bbk:Obs TIME_PERIOD="2023-07-12" OBS_VALUE="2.85037" BBK_DIFF_A="0.0334"/>
      <bbk:Obs TIME_PERIOD="2023-07-11" OBS_VALUE="2.81697" BBK_DIFF_A="-11.53865"/>
      <bbk:Obs TIME_PERIOD="2023-07-10" OBS_VALUE="14.35562" BBK_DIFF_A="11.6196"/>
      <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="2.73602" BBK_DIFF_A="0.00165"/>
      <bbk:Obs TIME_PERIOD="2023-07-06" OBS_VALUE="2.73437" BBK_DIFF_A="-1.42749"/>
      <bbk:Obs TIME_PERIOD="2023-07-05" OBS_VALUE="4.16186" BBK_DIFF_A="0.18233"/>
      <bbk:Obs TIME_PERIOD="2023-07-04" OBS_VALUE="3.97953" BBK_DIFF_A="0.03884"/>
      <bbk:Obs TIME_PERIOD="2023-07-03" OBS_VALUE="3.94069" BBK_DIFF_A="-16.05931"/>
      <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="20.0" BBK_DIFF_A="16.61978"/>
      <bbk:Obs TIME_PERIOD="2023-06-29" OBS_VALUE="3.38022" BBK_DIFF_A="-0.12027"/>
      <bbk:Obs TIME_PERIOD="2023-06-28" OBS_VALUE="3.50049" BBK_DIFF_A="-0.03618"/>
      <bbk:Obs TIME_PERIOD="2023-06-27" OBS_VALUE="3.53667" BBK_DIFF_A="0.05771"/>
      <bbk:Obs TIME_PERIOD="2023-06-26" OBS_VALUE="3.47896" BBK_DIFF_A="-0.51814"/>
      <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="3.9971" BBK_DIFF_A="-5.2993"/>
      <bbk:Obs TIME_PERIOD="2023-06-22" OBS_VALUE="9.2964" BBK_DIFF_A="-10.7036"/>
      <bbk:Obs TIME_PERIOD="2023-06-21" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2023-06-20" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2023-06-19" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <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="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2023-06-15" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2023-06-14" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2023-06-13" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2023-06-12" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <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="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2023-06-08" OBS_VALUE="20.0" BBK_DIFF_A="13.18363"/>
      <bbk:Obs TIME_PERIOD="2023-06-07" OBS_VALUE="6.81637" BBK_DIFF_A="-1.20786"/>
      <bbk:Obs TIME_PERIOD="2023-06-06" OBS_VALUE="8.02423" BBK_DIFF_A="-11.97577"/>
      <bbk:Obs TIME_PERIOD="2023-06-05" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <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="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2023-06-01" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2023-05-31" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2023-05-30" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2023-05-29" OBS_VALUE="20.0" BBK_DIFF_A="38.37414"/>
      <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="-18.37414" BBK_DIFF_A="0.20913"/>
      <bbk:Obs TIME_PERIOD="2023-05-25" OBS_VALUE="-18.58327" BBK_DIFF_A="-0.13593"/>
      <bbk:Obs TIME_PERIOD="2023-05-24" OBS_VALUE="-18.44734" BBK_DIFF_A="0.05587"/>
      <bbk:Obs TIME_PERIOD="2023-05-23" OBS_VALUE="-18.50321" BBK_DIFF_A="0.0143"/>
      <bbk:Obs TIME_PERIOD="2023-05-22" OBS_VALUE="-18.51751" BBK_DIFF_A="0.16672"/>
      <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="-18.68423" BBK_DIFF_A="0.03828"/>
      <bbk:Obs TIME_PERIOD="2023-05-18" OBS_VALUE="-18.72251" BBK_DIFF_A="0.0024"/>
      <bbk:Obs TIME_PERIOD="2023-05-17" OBS_VALUE="-18.72491" BBK_DIFF_A="-0.09123"/>
      <bbk:Obs TIME_PERIOD="2023-05-16" OBS_VALUE="-18.63368" BBK_DIFF_A="-0.00552"/>
      <bbk:Obs TIME_PERIOD="2023-05-15" OBS_VALUE="-18.62816" BBK_DIFF_A="-38.62816"/>
      <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="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2023-05-11" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2023-05-10" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2023-05-09" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2023-05-08" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <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="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2023-05-04" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2023-05-03" OBS_VALUE="20.0" BBK_DIFF_A="1.65934"/>
      <bbk:Obs TIME_PERIOD="2023-05-02" OBS_VALUE="18.34066" BBK_DIFF_A="14.69231"/>
      <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="3.64835" BBK_DIFF_A="0.10042"/>
      <bbk:Obs TIME_PERIOD="2023-04-27" OBS_VALUE="3.54793" BBK_DIFF_A="-0.12401"/>
      <bbk:Obs TIME_PERIOD="2023-04-26" OBS_VALUE="3.67194" BBK_DIFF_A="0.31919"/>
      <bbk:Obs TIME_PERIOD="2023-04-25" OBS_VALUE="3.35275" BBK_DIFF_A="0.18483"/>
      <bbk:Obs TIME_PERIOD="2023-04-24" OBS_VALUE="3.16792" BBK_DIFF_A="0.06335"/>
      <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="3.10457" BBK_DIFF_A="0.09389"/>
      <bbk:Obs TIME_PERIOD="2023-04-20" OBS_VALUE="3.01068" BBK_DIFF_A="-0.05874"/>
      <bbk:Obs TIME_PERIOD="2023-04-19" OBS_VALUE="3.06942" BBK_DIFF_A="-0.09328"/>
      <bbk:Obs TIME_PERIOD="2023-04-18" OBS_VALUE="3.1627" BBK_DIFF_A="-0.10083"/>
      <bbk:Obs TIME_PERIOD="2023-04-17" OBS_VALUE="3.26353" BBK_DIFF_A="-0.13107"/>
      <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="3.3946" BBK_DIFF_A="-0.01555"/>
      <bbk:Obs TIME_PERIOD="2023-04-13" OBS_VALUE="3.41015" BBK_DIFF_A="0.10588"/>
      <bbk:Obs TIME_PERIOD="2023-04-12" OBS_VALUE="3.30427" BBK_DIFF_A="-0.06049"/>
      <bbk:Obs TIME_PERIOD="2023-04-11" OBS_VALUE="3.36476" BBK_DIFF_A="-0.13313"/>
      <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="3.49789" BBK_DIFF_A="0.11112"/>
      <bbk:Obs TIME_PERIOD="2023-04-05" OBS_VALUE="3.38677" BBK_DIFF_A="-0.85001"/>
      <bbk:Obs TIME_PERIOD="2023-04-04" OBS_VALUE="4.23678" BBK_DIFF_A="1.19662"/>
      <bbk:Obs TIME_PERIOD="2023-04-03" OBS_VALUE="3.04016" BBK_DIFF_A="0.53966"/>
      <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="2.5005" BBK_DIFF_A="-0.29581"/>
      <bbk:Obs TIME_PERIOD="2023-03-30" OBS_VALUE="2.79631" BBK_DIFF_A="-0.04516"/>
      <bbk:Obs TIME_PERIOD="2023-03-29" OBS_VALUE="2.84147" BBK_DIFF_A="-0.10853"/>
      <bbk:Obs TIME_PERIOD="2023-03-28" OBS_VALUE="2.95" BBK_DIFF_A="0.01503"/>
      <bbk:Obs TIME_PERIOD="2023-03-27" OBS_VALUE="2.93497" BBK_DIFF_A="0.00973"/>
      <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="2.92524" BBK_DIFF_A="0.36664"/>
      <bbk:Obs TIME_PERIOD="2023-03-23" OBS_VALUE="2.5586" BBK_DIFF_A="0.15478"/>
      <bbk:Obs TIME_PERIOD="2023-03-22" OBS_VALUE="2.40382" BBK_DIFF_A="0.14436"/>
      <bbk:Obs TIME_PERIOD="2023-03-21" OBS_VALUE="2.25946" BBK_DIFF_A="-0.20103"/>
      <bbk:Obs TIME_PERIOD="2023-03-20" OBS_VALUE="2.46049" BBK_DIFF_A="0.12612"/>
      <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="2.33437" BBK_DIFF_A="0.38055"/>
      <bbk:Obs TIME_PERIOD="2023-03-16" OBS_VALUE="1.95382" BBK_DIFF_A="-0.48592"/>
      <bbk:Obs TIME_PERIOD="2023-03-15" OBS_VALUE="2.43974" BBK_DIFF_A="21.63969"/>
      <bbk:Obs TIME_PERIOD="2023-03-14" OBS_VALUE="-19.19995" BBK_DIFF_A="0.79355"/>
      <bbk:Obs TIME_PERIOD="2023-03-13" OBS_VALUE="-19.9935" BBK_DIFF_A="-1.19917"/>
      <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="-18.79433" BBK_DIFF_A="-13.77177"/>
      <bbk:Obs TIME_PERIOD="2023-03-09" OBS_VALUE="-5.02256" BBK_DIFF_A="14.97744"/>
      <bbk:Obs TIME_PERIOD="2023-03-08" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2023-03-07" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2023-03-06" OBS_VALUE="-20.0" BBK_DIFF_A="-24.91638"/>
      <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="4.91638" BBK_DIFF_A="-0.2101"/>
      <bbk:Obs TIME_PERIOD="2023-03-02" OBS_VALUE="5.12648" BBK_DIFF_A="0.7681"/>
      <bbk:Obs TIME_PERIOD="2023-03-01" OBS_VALUE="4.35838" BBK_DIFF_A="-0.0494"/>
      <bbk:Obs TIME_PERIOD="2023-02-28" OBS_VALUE="4.40778" BBK_DIFF_A="0.47384"/>
      <bbk:Obs TIME_PERIOD="2023-02-27" OBS_VALUE="3.93394" BBK_DIFF_A="0.3464"/>
      <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="3.58754" BBK_DIFF_A="0.54926"/>
      <bbk:Obs TIME_PERIOD="2023-02-23" OBS_VALUE="3.03828" BBK_DIFF_A="-1.28627"/>
      <bbk:Obs TIME_PERIOD="2023-02-22" OBS_VALUE="4.32455" BBK_DIFF_A="0.21701"/>
      <bbk:Obs TIME_PERIOD="2023-02-21" OBS_VALUE="4.10754" BBK_DIFF_A="-0.11924"/>
      <bbk:Obs TIME_PERIOD="2023-02-20" OBS_VALUE="4.22678" BBK_DIFF_A="1.06314"/>
      <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="3.16364" BBK_DIFF_A="-1.19757"/>
      <bbk:Obs TIME_PERIOD="2023-02-16" OBS_VALUE="4.36121" BBK_DIFF_A="0.38705"/>
      <bbk:Obs TIME_PERIOD="2023-02-15" OBS_VALUE="3.97416" BBK_DIFF_A="-0.22072"/>
      <bbk:Obs TIME_PERIOD="2023-02-14" OBS_VALUE="4.19488" BBK_DIFF_A="-0.08156"/>
      <bbk:Obs TIME_PERIOD="2023-02-13" OBS_VALUE="4.27644" BBK_DIFF_A="0.09193"/>
      <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="4.18451" BBK_DIFF_A="0.12352"/>
      <bbk:Obs TIME_PERIOD="2023-02-09" OBS_VALUE="4.06099" BBK_DIFF_A="0.55891"/>
      <bbk:Obs TIME_PERIOD="2023-02-08" OBS_VALUE="3.50208" BBK_DIFF_A="-0.26107"/>
      <bbk:Obs TIME_PERIOD="2023-02-07" OBS_VALUE="3.76315" BBK_DIFF_A="-0.4368"/>
      <bbk:Obs TIME_PERIOD="2023-02-06" OBS_VALUE="4.19995" BBK_DIFF_A="-0.1425"/>
      <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="4.34245" BBK_DIFF_A="0.59393"/>
      <bbk:Obs TIME_PERIOD="2023-02-02" OBS_VALUE="3.74852" BBK_DIFF_A="0.21565"/>
      <bbk:Obs TIME_PERIOD="2023-02-01" OBS_VALUE="3.53287" BBK_DIFF_A="-0.11734"/>
      <bbk:Obs TIME_PERIOD="2023-01-31" OBS_VALUE="3.65021" BBK_DIFF_A="-0.04984"/>
      <bbk:Obs TIME_PERIOD="2023-01-30" OBS_VALUE="3.70005" BBK_DIFF_A="0.25664"/>
      <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="3.44341" BBK_DIFF_A="-0.53856"/>
      <bbk:Obs TIME_PERIOD="2023-01-26" OBS_VALUE="3.98197" BBK_DIFF_A="0.33959"/>
      <bbk:Obs TIME_PERIOD="2023-01-25" OBS_VALUE="3.64238" BBK_DIFF_A="0.10876"/>
      <bbk:Obs TIME_PERIOD="2023-01-24" OBS_VALUE="3.53362" BBK_DIFF_A="-0.11011"/>
      <bbk:Obs TIME_PERIOD="2023-01-23" OBS_VALUE="3.64373" BBK_DIFF_A="0.23432"/>
      <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="3.40941" BBK_DIFF_A="-0.53252"/>
      <bbk:Obs TIME_PERIOD="2023-01-19" OBS_VALUE="3.94193" BBK_DIFF_A="0.11109"/>
      <bbk:Obs TIME_PERIOD="2023-01-18" OBS_VALUE="3.83084" BBK_DIFF_A="0.02761"/>
      <bbk:Obs TIME_PERIOD="2023-01-17" OBS_VALUE="3.80323" BBK_DIFF_A="-0.0827"/>
      <bbk:Obs TIME_PERIOD="2023-01-16" OBS_VALUE="3.88593" BBK_DIFF_A="0.35571"/>
      <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="3.53022" BBK_DIFF_A="0.35688"/>
      <bbk:Obs TIME_PERIOD="2023-01-12" OBS_VALUE="3.17334" BBK_DIFF_A="0.33438"/>
      <bbk:Obs TIME_PERIOD="2023-01-11" OBS_VALUE="2.83896" BBK_DIFF_A="-0.07818"/>
      <bbk:Obs TIME_PERIOD="2023-01-10" OBS_VALUE="2.91714" BBK_DIFF_A="0.10489"/>
      <bbk:Obs TIME_PERIOD="2023-01-09" OBS_VALUE="2.81225" BBK_DIFF_A="0.36196"/>
      <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="2.45029" BBK_DIFF_A="-0.0473"/>
      <bbk:Obs TIME_PERIOD="2023-01-05" OBS_VALUE="2.49759" BBK_DIFF_A="-0.96521"/>
      <bbk:Obs TIME_PERIOD="2023-01-04" OBS_VALUE="3.4628" BBK_DIFF_A="0.29899"/>
      <bbk:Obs TIME_PERIOD="2023-01-03" OBS_VALUE="3.16381" BBK_DIFF_A="-0.14449"/>
      <bbk:Obs TIME_PERIOD="2023-01-02" OBS_VALUE="3.3083" BBK_DIFF_A="-0.00163"/>
      <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="3.30993" BBK_DIFF_A="-0.17789"/>
      <bbk:Obs TIME_PERIOD="2022-12-29" OBS_VALUE="3.48782" BBK_DIFF_A="-0.05941"/>
      <bbk:Obs TIME_PERIOD="2022-12-28" OBS_VALUE="3.54723" BBK_DIFF_A="-0.06829"/>
      <bbk:Obs TIME_PERIOD="2022-12-27" OBS_VALUE="3.61552" BBK_DIFF_A="0.19092"/>
      <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="3.4246" BBK_DIFF_A="-0.12237"/>
      <bbk:Obs TIME_PERIOD="2022-12-22" OBS_VALUE="3.54697" BBK_DIFF_A="0.41526"/>
      <bbk:Obs TIME_PERIOD="2022-12-21" OBS_VALUE="3.13171" BBK_DIFF_A="0.04094"/>
      <bbk:Obs TIME_PERIOD="2022-12-20" OBS_VALUE="3.09077" BBK_DIFF_A="2.50523"/>
      <bbk:Obs TIME_PERIOD="2022-12-19" OBS_VALUE="0.58554" BBK_DIFF_A="-0.24947"/>
      <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="0.83501" BBK_DIFF_A="0.65902"/>
      <bbk:Obs TIME_PERIOD="2022-12-15" OBS_VALUE="0.17599" BBK_DIFF_A="-0.25816"/>
      <bbk:Obs TIME_PERIOD="2022-12-14" OBS_VALUE="0.43415" BBK_DIFF_A="0.00988"/>
      <bbk:Obs TIME_PERIOD="2022-12-13" OBS_VALUE="0.42427" BBK_DIFF_A="-0.48109"/>
      <bbk:Obs TIME_PERIOD="2022-12-12" OBS_VALUE="0.90536" BBK_DIFF_A="-1.58081"/>
      <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="2.48617" BBK_DIFF_A="0.10442"/>
      <bbk:Obs TIME_PERIOD="2022-12-08" OBS_VALUE="2.38175" BBK_DIFF_A="0.01343"/>
      <bbk:Obs TIME_PERIOD="2022-12-07" OBS_VALUE="2.36832" BBK_DIFF_A="-0.0586"/>
      <bbk:Obs TIME_PERIOD="2022-12-06" OBS_VALUE="2.42692" BBK_DIFF_A="-0.10173"/>
      <bbk:Obs TIME_PERIOD="2022-12-05" OBS_VALUE="2.52865" BBK_DIFF_A="-0.58342"/>
      <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="3.11207" BBK_DIFF_A="-0.022"/>
      <bbk:Obs TIME_PERIOD="2022-12-01" OBS_VALUE="3.13407" BBK_DIFF_A="-4.18252"/>
      <bbk:Obs TIME_PERIOD="2022-11-30" OBS_VALUE="7.31659" BBK_DIFF_A="0.64812"/>
      <bbk:Obs TIME_PERIOD="2022-11-29" OBS_VALUE="6.66847" BBK_DIFF_A="5.92721"/>
      <bbk:Obs TIME_PERIOD="2022-11-28" OBS_VALUE="0.74126" BBK_DIFF_A="-0.90063"/>
      <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="1.64189" BBK_DIFF_A="0.75652"/>
      <bbk:Obs TIME_PERIOD="2022-11-24" OBS_VALUE="0.88537" BBK_DIFF_A="-0.44754"/>
      <bbk:Obs TIME_PERIOD="2022-11-23" OBS_VALUE="1.33291" BBK_DIFF_A="-1.02776"/>
      <bbk:Obs TIME_PERIOD="2022-11-22" OBS_VALUE="2.36067" BBK_DIFF_A="0.14953"/>
      <bbk:Obs TIME_PERIOD="2022-11-21" OBS_VALUE="2.21114" BBK_DIFF_A="-0.07044"/>
      <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="2.28158" BBK_DIFF_A="-0.44369"/>
      <bbk:Obs TIME_PERIOD="2022-11-17" OBS_VALUE="2.72527" BBK_DIFF_A="-1.56336"/>
      <bbk:Obs TIME_PERIOD="2022-11-16" OBS_VALUE="4.28863" BBK_DIFF_A="-0.13338"/>
      <bbk:Obs TIME_PERIOD="2022-11-15" OBS_VALUE="4.42201" BBK_DIFF_A="-0.04029"/>
      <bbk:Obs TIME_PERIOD="2022-11-14" OBS_VALUE="4.4623" BBK_DIFF_A="0.10294"/>
      <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="4.35936" BBK_DIFF_A="-0.16481"/>
      <bbk:Obs TIME_PERIOD="2022-11-10" OBS_VALUE="4.52417" BBK_DIFF_A="0.23259"/>
      <bbk:Obs TIME_PERIOD="2022-11-09" OBS_VALUE="4.29158" BBK_DIFF_A="0.18433"/>
      <bbk:Obs TIME_PERIOD="2022-11-08" OBS_VALUE="4.10725" BBK_DIFF_A="0.17036"/>
      <bbk:Obs TIME_PERIOD="2022-11-07" OBS_VALUE="3.93689" BBK_DIFF_A="-0.01983"/>
      <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="3.95672" BBK_DIFF_A="0.00408"/>
      <bbk:Obs TIME_PERIOD="2022-11-03" OBS_VALUE="3.95264" BBK_DIFF_A="0.39564"/>
      <bbk:Obs TIME_PERIOD="2022-11-02" OBS_VALUE="3.557" BBK_DIFF_A="0.10947"/>
      <bbk:Obs TIME_PERIOD="2022-11-01" OBS_VALUE="3.44753" BBK_DIFF_A="0.12922"/>
      <bbk:Obs TIME_PERIOD="2022-10-31" OBS_VALUE="3.31831" BBK_DIFF_A="0.11485"/>
      <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="3.20346" BBK_DIFF_A="-0.52246"/>
      <bbk:Obs TIME_PERIOD="2022-10-27" OBS_VALUE="3.72592" BBK_DIFF_A="-0.3501"/>
      <bbk:Obs TIME_PERIOD="2022-10-26" OBS_VALUE="4.07602" BBK_DIFF_A="0.07131"/>
      <bbk:Obs TIME_PERIOD="2022-10-25" OBS_VALUE="4.00471" BBK_DIFF_A="-0.00631"/>
      <bbk:Obs TIME_PERIOD="2022-10-24" OBS_VALUE="4.01102" BBK_DIFF_A="-0.1298"/>
      <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="4.14082" BBK_DIFF_A="-0.01322"/>
      <bbk:Obs TIME_PERIOD="2022-10-20" OBS_VALUE="4.15404" BBK_DIFF_A="0.32314"/>
      <bbk:Obs TIME_PERIOD="2022-10-19" OBS_VALUE="3.8309" BBK_DIFF_A="-0.51038"/>
      <bbk:Obs TIME_PERIOD="2022-10-18" OBS_VALUE="4.34128" BBK_DIFF_A="-0.04085"/>
      <bbk:Obs TIME_PERIOD="2022-10-17" OBS_VALUE="4.38213" BBK_DIFF_A="-0.09572"/>
      <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="4.47785" BBK_DIFF_A="0.16864"/>
      <bbk:Obs TIME_PERIOD="2022-10-13" OBS_VALUE="4.30921" BBK_DIFF_A="-0.07163"/>
      <bbk:Obs TIME_PERIOD="2022-10-12" OBS_VALUE="4.38084" BBK_DIFF_A="-0.20234"/>
      <bbk:Obs TIME_PERIOD="2022-10-11" OBS_VALUE="4.58318" BBK_DIFF_A="0.28268"/>
      <bbk:Obs TIME_PERIOD="2022-10-10" OBS_VALUE="4.3005" BBK_DIFF_A="0.08704"/>
      <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="4.21346" BBK_DIFF_A="0.14999"/>
      <bbk:Obs TIME_PERIOD="2022-10-06" OBS_VALUE="4.06347" BBK_DIFF_A="-0.17183"/>
      <bbk:Obs TIME_PERIOD="2022-10-05" OBS_VALUE="4.2353" BBK_DIFF_A="-0.20505"/>
      <bbk:Obs TIME_PERIOD="2022-10-04" OBS_VALUE="4.44035" BBK_DIFF_A="0.08627"/>
      <bbk:Obs TIME_PERIOD="2022-10-03" OBS_VALUE="4.35408" BBK_DIFF_A="-0.16545"/>
      <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="4.51953" BBK_DIFF_A="0.25821"/>
      <bbk:Obs TIME_PERIOD="2022-09-29" OBS_VALUE="4.26132" BBK_DIFF_A="-0.09675"/>
      <bbk:Obs TIME_PERIOD="2022-09-28" OBS_VALUE="4.35807" BBK_DIFF_A="-0.64943"/>
      <bbk:Obs TIME_PERIOD="2022-09-27" OBS_VALUE="5.0075" BBK_DIFF_A="-0.02584"/>
      <bbk:Obs TIME_PERIOD="2022-09-26" OBS_VALUE="5.03334" BBK_DIFF_A="3.2217"/>
      <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="1.81164" BBK_DIFF_A="15.5599"/>
      <bbk:Obs TIME_PERIOD="2022-09-22" OBS_VALUE="-13.74826" BBK_DIFF_A="3.60284"/>
      <bbk:Obs TIME_PERIOD="2022-09-21" OBS_VALUE="-17.3511" BBK_DIFF_A="0.13371"/>
      <bbk:Obs TIME_PERIOD="2022-09-20" OBS_VALUE="-17.48481" BBK_DIFF_A="0.19066"/>
      <bbk:Obs TIME_PERIOD="2022-09-19" OBS_VALUE="-17.67547" BBK_DIFF_A="-0.07419"/>
      <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="-17.60128" BBK_DIFF_A="0.26978"/>
      <bbk:Obs TIME_PERIOD="2022-09-15" OBS_VALUE="-17.87106" BBK_DIFF_A="0.29991"/>
      <bbk:Obs TIME_PERIOD="2022-09-14" OBS_VALUE="-18.17097" BBK_DIFF_A="0.28409"/>
      <bbk:Obs TIME_PERIOD="2022-09-13" OBS_VALUE="-18.45506" BBK_DIFF_A="0.09864"/>
      <bbk:Obs TIME_PERIOD="2022-09-12" OBS_VALUE="-18.5537" BBK_DIFF_A="-0.11379"/>
      <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="-18.43991" BBK_DIFF_A="0.27128"/>
      <bbk:Obs TIME_PERIOD="2022-09-08" OBS_VALUE="-18.71119" BBK_DIFF_A="0.15241"/>
      <bbk:Obs TIME_PERIOD="2022-09-07" OBS_VALUE="-18.8636" BBK_DIFF_A="-0.11272"/>
      <bbk:Obs TIME_PERIOD="2022-09-06" OBS_VALUE="-18.75088" BBK_DIFF_A="-0.02147"/>
      <bbk:Obs TIME_PERIOD="2022-09-05" OBS_VALUE="-18.72941" BBK_DIFF_A="0.00374"/>
      <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="-18.73315" BBK_DIFF_A="-0.18528"/>
      <bbk:Obs TIME_PERIOD="2022-09-01" OBS_VALUE="-18.54787" BBK_DIFF_A="-0.12785"/>
      <bbk:Obs TIME_PERIOD="2022-08-31" OBS_VALUE="-18.42002" BBK_DIFF_A="-16.89154"/>
      <bbk:Obs TIME_PERIOD="2022-08-30" OBS_VALUE="-1.52848" BBK_DIFF_A="-0.06194"/>
      <bbk:Obs TIME_PERIOD="2022-08-29" OBS_VALUE="-1.46654" BBK_DIFF_A="0.30904"/>
      <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="-1.77558" BBK_DIFF_A="17.46542"/>
      <bbk:Obs TIME_PERIOD="2022-08-25" OBS_VALUE="-19.241" BBK_DIFF_A="-0.02722"/>
      <bbk:Obs TIME_PERIOD="2022-08-24" OBS_VALUE="-19.21378" BBK_DIFF_A="-0.25682"/>
      <bbk:Obs TIME_PERIOD="2022-08-23" OBS_VALUE="-18.95696" BBK_DIFF_A="0.26139"/>
      <bbk:Obs TIME_PERIOD="2022-08-22" OBS_VALUE="-19.21835" BBK_DIFF_A="0.10825"/>
      <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="-19.3266" BBK_DIFF_A="0.21764"/>
      <bbk:Obs TIME_PERIOD="2022-08-18" OBS_VALUE="-19.54424" BBK_DIFF_A="0.23985"/>
      <bbk:Obs TIME_PERIOD="2022-08-17" OBS_VALUE="-19.78409" BBK_DIFF_A="-14.01311"/>
      <bbk:Obs TIME_PERIOD="2022-08-16" OBS_VALUE="-5.77098" BBK_DIFF_A="14.22902"/>
      <bbk:Obs TIME_PERIOD="2022-08-15" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <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="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2022-08-11" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2022-08-10" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2022-08-09" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2022-08-08" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <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="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2022-08-04" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2022-08-03" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2022-08-02" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2022-08-01" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <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="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2022-07-28" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2022-07-27" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2022-07-26" OBS_VALUE="-20.0" BBK_DIFF_A="-14.98679"/>
      <bbk:Obs TIME_PERIOD="2022-07-25" OBS_VALUE="-5.01321" BBK_DIFF_A="-2.44685"/>
      <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="-2.56636" BBK_DIFF_A="-0.38163"/>
      <bbk:Obs TIME_PERIOD="2022-07-21" OBS_VALUE="-2.18473" BBK_DIFF_A="0.14675"/>
      <bbk:Obs TIME_PERIOD="2022-07-20" OBS_VALUE="-2.33148" BBK_DIFF_A="0.1116"/>
      <bbk:Obs TIME_PERIOD="2022-07-19" OBS_VALUE="-2.44308" BBK_DIFF_A="0.13248"/>
      <bbk:Obs TIME_PERIOD="2022-07-18" OBS_VALUE="-2.57556" BBK_DIFF_A="0.12916"/>
      <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="-2.70472" BBK_DIFF_A="-0.31912"/>
      <bbk:Obs TIME_PERIOD="2022-07-14" OBS_VALUE="-2.3856" BBK_DIFF_A="0.42723"/>
      <bbk:Obs TIME_PERIOD="2022-07-13" OBS_VALUE="-2.81283" BBK_DIFF_A="0.3138"/>
      <bbk:Obs TIME_PERIOD="2022-07-12" OBS_VALUE="-3.12663" BBK_DIFF_A="-0.30568"/>
      <bbk:Obs TIME_PERIOD="2022-07-11" OBS_VALUE="-2.82095" BBK_DIFF_A="-0.06654"/>
      <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="-2.75441" BBK_DIFF_A="-0.06005"/>
      <bbk:Obs TIME_PERIOD="2022-07-07" OBS_VALUE="-2.69436" BBK_DIFF_A="0.19211"/>
      <bbk:Obs TIME_PERIOD="2022-07-06" OBS_VALUE="-2.88647" BBK_DIFF_A="-0.27582"/>
      <bbk:Obs TIME_PERIOD="2022-07-05" OBS_VALUE="-2.61065" BBK_DIFF_A="-0.11372"/>
      <bbk:Obs TIME_PERIOD="2022-07-04" OBS_VALUE="-2.49693" BBK_DIFF_A="-0.11973"/>
      <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="-2.3772" BBK_DIFF_A="-0.23898"/>
      <bbk:Obs TIME_PERIOD="2022-06-30" OBS_VALUE="-2.13822" BBK_DIFF_A="-0.43263"/>
      <bbk:Obs TIME_PERIOD="2022-06-29" OBS_VALUE="-1.70559" BBK_DIFF_A="-0.3133"/>
      <bbk:Obs TIME_PERIOD="2022-06-28" OBS_VALUE="-1.39229" BBK_DIFF_A="0.24725"/>
      <bbk:Obs TIME_PERIOD="2022-06-27" OBS_VALUE="-1.63954" BBK_DIFF_A="-0.05056"/>
      <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="-1.58898" BBK_DIFF_A="0.10736"/>
      <bbk:Obs TIME_PERIOD="2022-06-23" OBS_VALUE="-1.69634" BBK_DIFF_A="-0.51388"/>
      <bbk:Obs TIME_PERIOD="2022-06-22" OBS_VALUE="-1.18246" BBK_DIFF_A="-0.31217"/>
      <bbk:Obs TIME_PERIOD="2022-06-21" OBS_VALUE="-0.87029" BBK_DIFF_A="0.05255"/>
      <bbk:Obs TIME_PERIOD="2022-06-20" OBS_VALUE="-0.92284" BBK_DIFF_A="0.01526"/>
      <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="-0.9381" BBK_DIFF_A="-0.49941"/>
      <bbk:Obs TIME_PERIOD="2022-06-16" OBS_VALUE="-0.43869" BBK_DIFF_A="0.28289"/>
      <bbk:Obs TIME_PERIOD="2022-06-15" OBS_VALUE="-0.72158" BBK_DIFF_A="-0.0251"/>
      <bbk:Obs TIME_PERIOD="2022-06-14" OBS_VALUE="-0.69648" BBK_DIFF_A="-4.2E-4"/>
      <bbk:Obs TIME_PERIOD="2022-06-13" OBS_VALUE="-0.69606" BBK_DIFF_A="0.79584"/>
      <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="-1.4919" BBK_DIFF_A="0.22551"/>
      <bbk:Obs TIME_PERIOD="2022-06-09" OBS_VALUE="-1.71741" BBK_DIFF_A="-0.24434"/>
      <bbk:Obs TIME_PERIOD="2022-06-08" OBS_VALUE="-1.47307" BBK_DIFF_A="0.13712"/>
      <bbk:Obs TIME_PERIOD="2022-06-07" OBS_VALUE="-1.61019" BBK_DIFF_A="0.03318"/>
      <bbk:Obs TIME_PERIOD="2022-06-06" OBS_VALUE="-1.64337" BBK_DIFF_A="0.02144"/>
      <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="-1.66481" BBK_DIFF_A="0.23174"/>
      <bbk:Obs TIME_PERIOD="2022-06-02" OBS_VALUE="-1.89655" BBK_DIFF_A="17.42295"/>
      <bbk:Obs TIME_PERIOD="2022-06-01" OBS_VALUE="-19.3195" BBK_DIFF_A="0.18289"/>
      <bbk:Obs TIME_PERIOD="2022-05-31" OBS_VALUE="-19.50239" BBK_DIFF_A="-0.04032"/>
      <bbk:Obs TIME_PERIOD="2022-05-30" OBS_VALUE="-19.46207" BBK_DIFF_A="0.15496"/>
      <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="-19.61703" BBK_DIFF_A="0.20933"/>
      <bbk:Obs TIME_PERIOD="2022-05-26" OBS_VALUE="-19.82636" BBK_DIFF_A="-0.24876"/>
      <bbk:Obs TIME_PERIOD="2022-05-25" OBS_VALUE="-19.5776" BBK_DIFF_A="-17.72181"/>
      <bbk:Obs TIME_PERIOD="2022-05-24" OBS_VALUE="-1.85579" BBK_DIFF_A="-0.03454"/>
      <bbk:Obs TIME_PERIOD="2022-05-23" OBS_VALUE="-1.82125" BBK_DIFF_A="-0.06467"/>
      <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="-1.75658" BBK_DIFF_A="0.03555"/>
      <bbk:Obs TIME_PERIOD="2022-05-19" OBS_VALUE="-1.79213" BBK_DIFF_A="0.01748"/>
      <bbk:Obs TIME_PERIOD="2022-05-18" OBS_VALUE="-1.80961" BBK_DIFF_A="0.18072"/>
      <bbk:Obs TIME_PERIOD="2022-05-17" OBS_VALUE="-1.99033" BBK_DIFF_A="-0.05428"/>
      <bbk:Obs TIME_PERIOD="2022-05-16" OBS_VALUE="-1.93605" BBK_DIFF_A="0.09589"/>
      <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="-2.03194" BBK_DIFF_A="0.06844"/>
      <bbk:Obs TIME_PERIOD="2022-05-12" OBS_VALUE="-2.10038" BBK_DIFF_A="-0.43153"/>
      <bbk:Obs TIME_PERIOD="2022-05-11" OBS_VALUE="-1.66885" BBK_DIFF_A="-0.21517"/>
      <bbk:Obs TIME_PERIOD="2022-05-10" OBS_VALUE="-1.45368" BBK_DIFF_A="-0.30318"/>
      <bbk:Obs TIME_PERIOD="2022-05-09" OBS_VALUE="-1.1505" BBK_DIFF_A="0.09109"/>
      <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="-1.24159" BBK_DIFF_A="0.0188"/>
      <bbk:Obs TIME_PERIOD="2022-05-05" OBS_VALUE="-1.26039" BBK_DIFF_A="0.16307"/>
      <bbk:Obs TIME_PERIOD="2022-05-04" OBS_VALUE="-1.42346" BBK_DIFF_A="-0.14141"/>
      <bbk:Obs TIME_PERIOD="2022-05-03" OBS_VALUE="-1.28205" BBK_DIFF_A="0.27772"/>
      <bbk:Obs TIME_PERIOD="2022-05-02" OBS_VALUE="-1.55977" BBK_DIFF_A="0.04696"/>
      <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="-1.60673" BBK_DIFF_A="0.08301"/>
      <bbk:Obs TIME_PERIOD="2022-04-28" OBS_VALUE="-1.68974" BBK_DIFF_A="0.02012"/>
      <bbk:Obs TIME_PERIOD="2022-04-27" OBS_VALUE="-1.70986" BBK_DIFF_A="-0.34743"/>
      <bbk:Obs TIME_PERIOD="2022-04-26" OBS_VALUE="-1.36243" BBK_DIFF_A="0.14081"/>
      <bbk:Obs TIME_PERIOD="2022-04-25" OBS_VALUE="-1.50324" BBK_DIFF_A="-0.06528"/>
      <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="-1.43796" BBK_DIFF_A="0.00212"/>
      <bbk:Obs TIME_PERIOD="2022-04-21" OBS_VALUE="-1.44008" BBK_DIFF_A="0.30698"/>
      <bbk:Obs TIME_PERIOD="2022-04-20" OBS_VALUE="-1.74706" BBK_DIFF_A="-0.20494"/>
      <bbk:Obs TIME_PERIOD="2022-04-19" OBS_VALUE="-1.54212" BBK_DIFF_A="0.23421"/>
      <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="-1.77633" BBK_DIFF_A="-0.11737"/>
      <bbk:Obs TIME_PERIOD="2022-04-13" OBS_VALUE="-1.65896" BBK_DIFF_A="0.35057"/>
      <bbk:Obs TIME_PERIOD="2022-04-12" OBS_VALUE="-2.00953" BBK_DIFF_A="0.06639"/>
      <bbk:Obs TIME_PERIOD="2022-04-11" OBS_VALUE="-2.07592" BBK_DIFF_A="0.1178"/>
      <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="-2.19372" BBK_DIFF_A="0.11021"/>
      <bbk:Obs TIME_PERIOD="2022-04-07" OBS_VALUE="-2.30393" BBK_DIFF_A="0.07189"/>
      <bbk:Obs TIME_PERIOD="2022-04-06" OBS_VALUE="-2.37582" BBK_DIFF_A="0.11302"/>
      <bbk:Obs TIME_PERIOD="2022-04-05" OBS_VALUE="-2.48884" BBK_DIFF_A="0.17944"/>
      <bbk:Obs TIME_PERIOD="2022-04-04" OBS_VALUE="-2.66828" BBK_DIFF_A="-0.33979"/>
      <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="-2.32849" BBK_DIFF_A="0.20217"/>
      <bbk:Obs TIME_PERIOD="2022-03-31" OBS_VALUE="-2.53066" BBK_DIFF_A="-0.39776"/>
      <bbk:Obs TIME_PERIOD="2022-03-30" OBS_VALUE="-2.1329" BBK_DIFF_A="-0.10136"/>
      <bbk:Obs TIME_PERIOD="2022-03-29" OBS_VALUE="-2.03154" BBK_DIFF_A="-0.14291"/>
      <bbk:Obs TIME_PERIOD="2022-03-28" OBS_VALUE="-1.88863" BBK_DIFF_A="0.47914"/>
      <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="-2.36777" BBK_DIFF_A="-0.06692"/>
      <bbk:Obs TIME_PERIOD="2022-03-24" OBS_VALUE="-2.30085" BBK_DIFF_A="0.15883"/>
      <bbk:Obs TIME_PERIOD="2022-03-23" OBS_VALUE="-2.45968" BBK_DIFF_A="-0.11808"/>
      <bbk:Obs TIME_PERIOD="2022-03-22" OBS_VALUE="-2.3416" BBK_DIFF_A="0.11954"/>
      <bbk:Obs TIME_PERIOD="2022-03-21" OBS_VALUE="-2.46114" BBK_DIFF_A="0.16919"/>
      <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="-2.63033" BBK_DIFF_A="-0.11361"/>
      <bbk:Obs TIME_PERIOD="2022-03-17" OBS_VALUE="-2.51672" BBK_DIFF_A="-0.02169"/>
      <bbk:Obs TIME_PERIOD="2022-03-16" OBS_VALUE="-2.49503" BBK_DIFF_A="0.02704"/>
      <bbk:Obs TIME_PERIOD="2022-03-15" OBS_VALUE="-2.52207" BBK_DIFF_A="0.00433"/>
      <bbk:Obs TIME_PERIOD="2022-03-14" OBS_VALUE="-2.5264" BBK_DIFF_A="0.09856"/>
      <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="-2.62496" BBK_DIFF_A="0.10714"/>
      <bbk:Obs TIME_PERIOD="2022-03-10" OBS_VALUE="-2.7321" BBK_DIFF_A="0.1882"/>
      <bbk:Obs TIME_PERIOD="2022-03-09" OBS_VALUE="-2.9203" BBK_DIFF_A="-0.07368"/>
      <bbk:Obs TIME_PERIOD="2022-03-08" OBS_VALUE="-2.84662" BBK_DIFF_A="0.37654"/>
      <bbk:Obs TIME_PERIOD="2022-03-07" OBS_VALUE="-3.22316" BBK_DIFF_A="-0.77217"/>
      <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="-2.45099" BBK_DIFF_A="0.24834"/>
      <bbk:Obs TIME_PERIOD="2022-03-03" OBS_VALUE="-2.69933" BBK_DIFF_A="-0.44386"/>
      <bbk:Obs TIME_PERIOD="2022-03-02" OBS_VALUE="-2.25547" BBK_DIFF_A="0.42344"/>
      <bbk:Obs TIME_PERIOD="2022-03-01" OBS_VALUE="-2.67891" BBK_DIFF_A="0.81213"/>
      <bbk:Obs TIME_PERIOD="2022-02-28" OBS_VALUE="-3.49104" BBK_DIFF_A="0.03614"/>
      <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="-3.52718" BBK_DIFF_A="0.1871"/>
      <bbk:Obs TIME_PERIOD="2022-02-24" OBS_VALUE="-3.71428" BBK_DIFF_A="0.20345"/>
      <bbk:Obs TIME_PERIOD="2022-02-23" OBS_VALUE="-3.91773" BBK_DIFF_A="-0.27462"/>
      <bbk:Obs TIME_PERIOD="2022-02-22" OBS_VALUE="-3.64311" BBK_DIFF_A="-0.14079"/>
      <bbk:Obs TIME_PERIOD="2022-02-21" OBS_VALUE="-3.50232" BBK_DIFF_A="0.14372"/>
      <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="-3.64604" BBK_DIFF_A="0.21037"/>
      <bbk:Obs TIME_PERIOD="2022-02-17" OBS_VALUE="-3.85641" BBK_DIFF_A="0.13005"/>
      <bbk:Obs TIME_PERIOD="2022-02-16" OBS_VALUE="-3.98646" BBK_DIFF_A="0.09784"/>
      <bbk:Obs TIME_PERIOD="2022-02-15" OBS_VALUE="-4.0843" BBK_DIFF_A="-0.03864"/>
      <bbk:Obs TIME_PERIOD="2022-02-14" OBS_VALUE="-4.04566" BBK_DIFF_A="0.176"/>
      <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="-4.22166" BBK_DIFF_A="-22.76604"/>
      <bbk:Obs TIME_PERIOD="2022-02-10" OBS_VALUE="18.54438" BBK_DIFF_A="13.9892"/>
      <bbk:Obs TIME_PERIOD="2022-02-09" OBS_VALUE="4.55518" BBK_DIFF_A="1.54794"/>
      <bbk:Obs TIME_PERIOD="2022-02-08" OBS_VALUE="3.00724" BBK_DIFF_A="7.15742"/>
      <bbk:Obs TIME_PERIOD="2022-02-07" OBS_VALUE="-4.15018" BBK_DIFF_A="-0.34218"/>
      <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="-3.808" BBK_DIFF_A="-1.02401"/>
      <bbk:Obs TIME_PERIOD="2022-02-03" OBS_VALUE="-2.78399" BBK_DIFF_A="-0.18173"/>
      <bbk:Obs TIME_PERIOD="2022-02-02" OBS_VALUE="-2.60226" BBK_DIFF_A="-0.2094"/>
      <bbk:Obs TIME_PERIOD="2022-02-01" OBS_VALUE="-2.39286" BBK_DIFF_A="-0.09228"/>
      <bbk:Obs TIME_PERIOD="2022-01-31" OBS_VALUE="-2.30058" BBK_DIFF_A="-0.18747"/>
      <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="-2.11311" BBK_DIFF_A="-0.18032"/>
      <bbk:Obs TIME_PERIOD="2022-01-27" OBS_VALUE="-1.93279" BBK_DIFF_A="-0.27039"/>
      <bbk:Obs TIME_PERIOD="2022-01-26" OBS_VALUE="-1.6624" BBK_DIFF_A="0.07777"/>
      <bbk:Obs TIME_PERIOD="2022-01-25" OBS_VALUE="-1.74017" BBK_DIFF_A="0.0329"/>
      <bbk:Obs TIME_PERIOD="2022-01-24" OBS_VALUE="-1.77307" BBK_DIFF_A="0.05127"/>
      <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="-1.82434" BBK_DIFF_A="0.02115"/>
      <bbk:Obs TIME_PERIOD="2022-01-20" OBS_VALUE="-1.84549" BBK_DIFF_A="0.04572"/>
      <bbk:Obs TIME_PERIOD="2022-01-19" OBS_VALUE="-1.89121" BBK_DIFF_A="-0.04678"/>
      <bbk:Obs TIME_PERIOD="2022-01-18" OBS_VALUE="-1.84443" BBK_DIFF_A="-0.02383"/>
      <bbk:Obs TIME_PERIOD="2022-01-17" OBS_VALUE="-1.8206" BBK_DIFF_A="-0.00999"/>
      <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="-1.81061" BBK_DIFF_A="2.46875"/>
      <bbk:Obs TIME_PERIOD="2022-01-13" OBS_VALUE="-4.27936" BBK_DIFF_A="0.19987"/>
      <bbk:Obs TIME_PERIOD="2022-01-12" OBS_VALUE="-4.47923" BBK_DIFF_A="-0.21082"/>
      <bbk:Obs TIME_PERIOD="2022-01-11" OBS_VALUE="-4.26841" BBK_DIFF_A="8.5E-4"/>
      <bbk:Obs TIME_PERIOD="2022-01-10" OBS_VALUE="-4.26926" BBK_DIFF_A="0.12639"/>
      <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="-4.39565" BBK_DIFF_A="0.01328"/>
      <bbk:Obs TIME_PERIOD="2022-01-06" OBS_VALUE="-4.40893" BBK_DIFF_A="0.24742"/>
      <bbk:Obs TIME_PERIOD="2022-01-05" OBS_VALUE="-4.65635" BBK_DIFF_A="-0.07939"/>
      <bbk:Obs TIME_PERIOD="2022-01-04" OBS_VALUE="-4.57696" BBK_DIFF_A="0.04861"/>
      <bbk:Obs TIME_PERIOD="2022-01-03" OBS_VALUE="-4.62557" BBK_DIFF_A="0.04497"/>
      <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="-4.67054" BBK_DIFF_A="0.23431"/>
      <bbk:Obs TIME_PERIOD="2021-12-29" OBS_VALUE="-4.90485" BBK_DIFF_A="0.05694"/>
      <bbk:Obs TIME_PERIOD="2021-12-28" OBS_VALUE="-4.96179" BBK_DIFF_A="-0.01992"/>
      <bbk:Obs TIME_PERIOD="2021-12-27" OBS_VALUE="-4.94187" BBK_DIFF_A="0.04647"/>
      <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="-4.98834" BBK_DIFF_A="0.06808"/>
      <bbk:Obs TIME_PERIOD="2021-12-22" OBS_VALUE="-5.05642" BBK_DIFF_A="0.22726"/>
      <bbk:Obs TIME_PERIOD="2021-12-21" OBS_VALUE="-5.28368" BBK_DIFF_A="0.40625"/>
      <bbk:Obs TIME_PERIOD="2021-12-20" OBS_VALUE="-5.68993" BBK_DIFF_A="-0.19451"/>
      <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="-5.49542" BBK_DIFF_A="0.04924"/>
      <bbk:Obs TIME_PERIOD="2021-12-16" OBS_VALUE="-5.54466" BBK_DIFF_A="0.14726"/>
      <bbk:Obs TIME_PERIOD="2021-12-15" OBS_VALUE="-5.69192" BBK_DIFF_A="-4.50108"/>
      <bbk:Obs TIME_PERIOD="2021-12-14" OBS_VALUE="-1.19084" BBK_DIFF_A="0.1646"/>
      <bbk:Obs TIME_PERIOD="2021-12-13" OBS_VALUE="-1.35544" BBK_DIFF_A="-0.23352"/>
      <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="-1.12192" BBK_DIFF_A="0.06643"/>
      <bbk:Obs TIME_PERIOD="2021-12-09" OBS_VALUE="-1.18835" BBK_DIFF_A="-0.02527"/>
      <bbk:Obs TIME_PERIOD="2021-12-08" OBS_VALUE="-1.16308" BBK_DIFF_A="-0.12177"/>
      <bbk:Obs TIME_PERIOD="2021-12-07" OBS_VALUE="-1.04131" BBK_DIFF_A="0.06198"/>
      <bbk:Obs TIME_PERIOD="2021-12-06" OBS_VALUE="-1.10329" BBK_DIFF_A="0.00195"/>
      <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="-1.10524" BBK_DIFF_A="0.03129"/>
      <bbk:Obs TIME_PERIOD="2021-12-02" OBS_VALUE="-1.13653" BBK_DIFF_A="0.03306"/>
      <bbk:Obs TIME_PERIOD="2021-12-01" OBS_VALUE="-1.16959" BBK_DIFF_A="-0.40986"/>
      <bbk:Obs TIME_PERIOD="2021-11-30" OBS_VALUE="-0.75973" BBK_DIFF_A="0.22867"/>
      <bbk:Obs TIME_PERIOD="2021-11-29" OBS_VALUE="-0.9884" BBK_DIFF_A="-0.07745"/>
      <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="-0.91095" BBK_DIFF_A="0.17576"/>
      <bbk:Obs TIME_PERIOD="2021-11-25" OBS_VALUE="-1.08671" BBK_DIFF_A="-0.1077"/>
      <bbk:Obs TIME_PERIOD="2021-11-24" OBS_VALUE="-0.97901" BBK_DIFF_A="0.17458"/>
      <bbk:Obs TIME_PERIOD="2021-11-23" OBS_VALUE="-1.15359" BBK_DIFF_A="-0.15608"/>
      <bbk:Obs TIME_PERIOD="2021-11-22" OBS_VALUE="-0.99751" BBK_DIFF_A="0.04459"/>
      <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="-1.0421" BBK_DIFF_A="0.08911"/>
      <bbk:Obs TIME_PERIOD="2021-11-18" OBS_VALUE="-1.13121" BBK_DIFF_A="0.03057"/>
      <bbk:Obs TIME_PERIOD="2021-11-17" OBS_VALUE="-1.16178" BBK_DIFF_A="-0.00202"/>
      <bbk:Obs TIME_PERIOD="2021-11-16" OBS_VALUE="-1.15976" BBK_DIFF_A="0.02822"/>
      <bbk:Obs TIME_PERIOD="2021-11-15" OBS_VALUE="-1.18798" BBK_DIFF_A="0.3342"/>
      <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="-1.52218" BBK_DIFF_A="-0.07208"/>
      <bbk:Obs TIME_PERIOD="2021-11-11" OBS_VALUE="-1.4501" BBK_DIFF_A="-0.40683"/>
      <bbk:Obs TIME_PERIOD="2021-11-10" OBS_VALUE="-1.04327" BBK_DIFF_A="-0.14809"/>
      <bbk:Obs TIME_PERIOD="2021-11-09" OBS_VALUE="-0.89518" BBK_DIFF_A="-0.04899"/>
      <bbk:Obs TIME_PERIOD="2021-11-08" OBS_VALUE="-0.84619" BBK_DIFF_A="0.00715"/>
      <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="-0.85334" BBK_DIFF_A="0.12901"/>
      <bbk:Obs TIME_PERIOD="2021-11-04" OBS_VALUE="-0.98235" BBK_DIFF_A="0.26759"/>
      <bbk:Obs TIME_PERIOD="2021-11-03" OBS_VALUE="-1.24994" BBK_DIFF_A="0.23475"/>
      <bbk:Obs TIME_PERIOD="2021-11-02" OBS_VALUE="-1.48469" BBK_DIFF_A="0.28968"/>
      <bbk:Obs TIME_PERIOD="2021-11-01" OBS_VALUE="-1.77437" BBK_DIFF_A="-0.11267"/>
      <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="-1.6617" BBK_DIFF_A="-0.16721"/>
      <bbk:Obs TIME_PERIOD="2021-10-28" OBS_VALUE="-1.49449" BBK_DIFF_A="-0.34092"/>
      <bbk:Obs TIME_PERIOD="2021-10-27" OBS_VALUE="-1.15357" BBK_DIFF_A="-0.07607"/>
      <bbk:Obs TIME_PERIOD="2021-10-26" OBS_VALUE="-1.0775" BBK_DIFF_A="0.07615"/>
      <bbk:Obs TIME_PERIOD="2021-10-25" OBS_VALUE="-1.15365" BBK_DIFF_A="-0.07169"/>
      <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="-1.08196" BBK_DIFF_A="-0.2655"/>
      <bbk:Obs TIME_PERIOD="2021-10-21" OBS_VALUE="-0.81646" BBK_DIFF_A="0.02901"/>
      <bbk:Obs TIME_PERIOD="2021-10-20" OBS_VALUE="-0.84547" BBK_DIFF_A="-0.00347"/>
      <bbk:Obs TIME_PERIOD="2021-10-19" OBS_VALUE="-0.842" BBK_DIFF_A="-0.07172"/>
      <bbk:Obs TIME_PERIOD="2021-10-18" OBS_VALUE="-0.77028" BBK_DIFF_A="-0.21516"/>
      <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="-0.55512" BBK_DIFF_A="0.06685"/>
      <bbk:Obs TIME_PERIOD="2021-10-14" OBS_VALUE="-0.62197" BBK_DIFF_A="-0.09533"/>
      <bbk:Obs TIME_PERIOD="2021-10-13" OBS_VALUE="-0.52664" BBK_DIFF_A="-0.05737"/>
      <bbk:Obs TIME_PERIOD="2021-10-12" OBS_VALUE="-0.46927" BBK_DIFF_A="-0.03702"/>
      <bbk:Obs TIME_PERIOD="2021-10-11" OBS_VALUE="-0.43225" BBK_DIFF_A="-0.03879"/>
      <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="-0.39346" BBK_DIFF_A="-0.08289"/>
      <bbk:Obs TIME_PERIOD="2021-10-07" OBS_VALUE="-0.31057" BBK_DIFF_A="0.10054"/>
      <bbk:Obs TIME_PERIOD="2021-10-06" OBS_VALUE="-0.41111" BBK_DIFF_A="-0.03174"/>
      <bbk:Obs TIME_PERIOD="2021-10-05" OBS_VALUE="-0.37937" BBK_DIFF_A="0.01722"/>
      <bbk:Obs TIME_PERIOD="2021-10-04" OBS_VALUE="-0.39659" BBK_DIFF_A="-0.04898"/>
      <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="-0.34761" BBK_DIFF_A="-0.00134"/>
      <bbk:Obs TIME_PERIOD="2021-09-30" OBS_VALUE="-0.34627" BBK_DIFF_A="0.0638"/>
      <bbk:Obs TIME_PERIOD="2021-09-29" OBS_VALUE="-0.41007" BBK_DIFF_A="-0.01895"/>
      <bbk:Obs TIME_PERIOD="2021-09-28" OBS_VALUE="-0.39112" BBK_DIFF_A="-0.00601"/>
      <bbk:Obs TIME_PERIOD="2021-09-27" OBS_VALUE="-0.38511" BBK_DIFF_A="0.04857"/>
      <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="-0.43368" BBK_DIFF_A="-0.05767"/>
      <bbk:Obs TIME_PERIOD="2021-09-23" OBS_VALUE="-0.37601" BBK_DIFF_A="-0.06588"/>
      <bbk:Obs TIME_PERIOD="2021-09-22" OBS_VALUE="-0.31013" BBK_DIFF_A="-0.01004"/>
      <bbk:Obs TIME_PERIOD="2021-09-21" OBS_VALUE="-0.30009" BBK_DIFF_A="0.0633"/>
      <bbk:Obs TIME_PERIOD="2021-09-20" OBS_VALUE="-0.36339" BBK_DIFF_A="-0.07496"/>
      <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="-0.28843" BBK_DIFF_A="-0.05781"/>
      <bbk:Obs TIME_PERIOD="2021-09-16" OBS_VALUE="-0.23062" BBK_DIFF_A="0.01408"/>
      <bbk:Obs TIME_PERIOD="2021-09-15" OBS_VALUE="-0.2447" BBK_DIFF_A="0.05914"/>
      <bbk:Obs TIME_PERIOD="2021-09-14" OBS_VALUE="-0.30384" BBK_DIFF_A="-0.0092"/>
      <bbk:Obs TIME_PERIOD="2021-09-13" OBS_VALUE="-0.29464" BBK_DIFF_A="-0.00608"/>
      <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="-0.28856" BBK_DIFF_A="0.08592"/>
      <bbk:Obs TIME_PERIOD="2021-09-09" OBS_VALUE="-0.37448" BBK_DIFF_A="-0.07022"/>
      <bbk:Obs TIME_PERIOD="2021-09-08" OBS_VALUE="-0.30426" BBK_DIFF_A="0.26944"/>
      <bbk:Obs TIME_PERIOD="2021-09-07" OBS_VALUE="-0.5737" BBK_DIFF_A="0.24124"/>
      <bbk:Obs TIME_PERIOD="2021-09-06" OBS_VALUE="-0.81494" BBK_DIFF_A="-0.35018"/>
      <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="-0.46476" BBK_DIFF_A="-0.05083"/>
      <bbk:Obs TIME_PERIOD="2021-09-02" OBS_VALUE="-0.41393" BBK_DIFF_A="6.2119"/>
      <bbk:Obs TIME_PERIOD="2021-09-01" OBS_VALUE="-6.62583" BBK_DIFF_A="0.50296"/>
      <bbk:Obs TIME_PERIOD="2021-08-31" OBS_VALUE="-7.12879" BBK_DIFF_A="0.51553"/>
      <bbk:Obs TIME_PERIOD="2021-08-30" OBS_VALUE="-7.64432" BBK_DIFF_A="0.48986"/>
      <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="-8.13418" BBK_DIFF_A="-0.11763"/>
      <bbk:Obs TIME_PERIOD="2021-08-26" OBS_VALUE="-8.01655" BBK_DIFF_A="-8.45749"/>
      <bbk:Obs TIME_PERIOD="2021-08-25" OBS_VALUE="0.44094" BBK_DIFF_A="0.07777"/>
      <bbk:Obs TIME_PERIOD="2021-08-24" OBS_VALUE="0.36317" BBK_DIFF_A="7.1819"/>
      <bbk:Obs TIME_PERIOD="2021-08-23" OBS_VALUE="-6.81873" BBK_DIFF_A="1.3392"/>
      <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="-8.15793" BBK_DIFF_A="0.03815"/>
      <bbk:Obs TIME_PERIOD="2021-08-19" OBS_VALUE="-8.19608" BBK_DIFF_A="-0.71759"/>
      <bbk:Obs TIME_PERIOD="2021-08-18" OBS_VALUE="-7.47849" BBK_DIFF_A="0.5779"/>
      <bbk:Obs TIME_PERIOD="2021-08-17" OBS_VALUE="-8.05639" BBK_DIFF_A="-0.77549"/>
      <bbk:Obs TIME_PERIOD="2021-08-16" OBS_VALUE="-7.2809" BBK_DIFF_A="0.76704"/>
      <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="-8.04794" BBK_DIFF_A="-0.31648"/>
      <bbk:Obs TIME_PERIOD="2021-08-12" OBS_VALUE="-7.73146" BBK_DIFF_A="0.62738"/>
      <bbk:Obs TIME_PERIOD="2021-08-11" OBS_VALUE="-8.35884" BBK_DIFF_A="-0.15825"/>
      <bbk:Obs TIME_PERIOD="2021-08-10" OBS_VALUE="-8.20059" BBK_DIFF_A="0.19293"/>
      <bbk:Obs TIME_PERIOD="2021-08-09" OBS_VALUE="-8.39352" BBK_DIFF_A="-8.81348"/>
      <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="0.41996" BBK_DIFF_A="-0.00974"/>
      <bbk:Obs TIME_PERIOD="2021-08-05" OBS_VALUE="0.4297" BBK_DIFF_A="0.7634"/>
      <bbk:Obs TIME_PERIOD="2021-08-04" OBS_VALUE="-0.3337" BBK_DIFF_A="0.10649"/>
      <bbk:Obs TIME_PERIOD="2021-08-03" OBS_VALUE="-0.44019" BBK_DIFF_A="-0.0635"/>
      <bbk:Obs TIME_PERIOD="2021-08-02" OBS_VALUE="-0.37669" BBK_DIFF_A="-0.87656"/>
      <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="0.49987" BBK_DIFF_A="0.0832"/>
      <bbk:Obs TIME_PERIOD="2021-07-29" OBS_VALUE="0.41667" BBK_DIFF_A="-0.01248"/>
      <bbk:Obs TIME_PERIOD="2021-07-28" OBS_VALUE="0.42915" BBK_DIFF_A="-0.00405"/>
      <bbk:Obs TIME_PERIOD="2021-07-27" OBS_VALUE="0.4332" BBK_DIFF_A="8.07419"/>
      <bbk:Obs TIME_PERIOD="2021-07-26" OBS_VALUE="-7.64099" BBK_DIFF_A="-7.87809"/>
      <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="0.2371" BBK_DIFF_A="0.03334"/>
      <bbk:Obs TIME_PERIOD="2021-07-22" OBS_VALUE="0.20376" BBK_DIFF_A="-0.00325"/>
      <bbk:Obs TIME_PERIOD="2021-07-21" OBS_VALUE="0.20701" BBK_DIFF_A="0.05591"/>
      <bbk:Obs TIME_PERIOD="2021-07-20" OBS_VALUE="0.1511" BBK_DIFF_A="-0.05608"/>
      <bbk:Obs TIME_PERIOD="2021-07-19" OBS_VALUE="0.20718" BBK_DIFF_A="0.0064"/>
      <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="0.20078" BBK_DIFF_A="-0.01723"/>
      <bbk:Obs TIME_PERIOD="2021-07-15" OBS_VALUE="0.21801" BBK_DIFF_A="-0.01251"/>
      <bbk:Obs TIME_PERIOD="2021-07-14" OBS_VALUE="0.23052" BBK_DIFF_A="-0.01308"/>
      <bbk:Obs TIME_PERIOD="2021-07-13" OBS_VALUE="0.2436" BBK_DIFF_A="0.0094"/>
      <bbk:Obs TIME_PERIOD="2021-07-12" OBS_VALUE="0.2342" BBK_DIFF_A="-0.05329"/>
      <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="0.28749" BBK_DIFF_A="-0.03375"/>
      <bbk:Obs TIME_PERIOD="2021-07-08" OBS_VALUE="0.32124" BBK_DIFF_A="0.01808"/>
      <bbk:Obs TIME_PERIOD="2021-07-07" OBS_VALUE="0.30316" BBK_DIFF_A="-0.02386"/>
      <bbk:Obs TIME_PERIOD="2021-07-06" OBS_VALUE="0.32702" BBK_DIFF_A="0.13775"/>
      <bbk:Obs TIME_PERIOD="2021-07-05" OBS_VALUE="0.18927" BBK_DIFF_A="-0.1431"/>
      <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="0.33237" BBK_DIFF_A="-0.05215"/>
      <bbk:Obs TIME_PERIOD="2021-07-01" OBS_VALUE="0.38452" BBK_DIFF_A="0.01404"/>
      <bbk:Obs TIME_PERIOD="2021-06-30" OBS_VALUE="0.37048" BBK_DIFF_A="0.0299"/>
      <bbk:Obs TIME_PERIOD="2021-06-29" OBS_VALUE="0.34058" BBK_DIFF_A="-0.02601"/>
      <bbk:Obs TIME_PERIOD="2021-06-28" OBS_VALUE="0.36659" BBK_DIFF_A="-0.01418"/>
      <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="0.38077" BBK_DIFF_A="-0.02895"/>
      <bbk:Obs TIME_PERIOD="2021-06-24" OBS_VALUE="0.40972" BBK_DIFF_A="0.00739"/>
      <bbk:Obs TIME_PERIOD="2021-06-23" OBS_VALUE="0.40233" BBK_DIFF_A="-0.01456"/>
      <bbk:Obs TIME_PERIOD="2021-06-22" OBS_VALUE="0.41689" BBK_DIFF_A="0.00207"/>
      <bbk:Obs TIME_PERIOD="2021-06-21" OBS_VALUE="0.41482" BBK_DIFF_A="-0.06084"/>
      <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="0.47566" BBK_DIFF_A="-0.10227"/>
      <bbk:Obs TIME_PERIOD="2021-06-17" OBS_VALUE="0.57793" BBK_DIFF_A="0.01898"/>
      <bbk:Obs TIME_PERIOD="2021-06-16" OBS_VALUE="0.55895" BBK_DIFF_A="0.10621"/>
      <bbk:Obs TIME_PERIOD="2021-06-15" OBS_VALUE="0.45274" BBK_DIFF_A="-0.09032"/>
      <bbk:Obs TIME_PERIOD="2021-06-14" OBS_VALUE="0.54306" BBK_DIFF_A="0.06061"/>
      <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="0.48245" BBK_DIFF_A="-0.03007"/>
      <bbk:Obs TIME_PERIOD="2021-06-10" OBS_VALUE="0.51252" BBK_DIFF_A="0.01326"/>
      <bbk:Obs TIME_PERIOD="2021-06-09" OBS_VALUE="0.49926" BBK_DIFF_A="-0.04481"/>
      <bbk:Obs TIME_PERIOD="2021-06-08" OBS_VALUE="0.54407" BBK_DIFF_A="-0.02153"/>
      <bbk:Obs TIME_PERIOD="2021-06-07" OBS_VALUE="0.5656" BBK_DIFF_A="0.02795"/>
      <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="0.53765" BBK_DIFF_A="0.03309"/>
      <bbk:Obs TIME_PERIOD="2021-06-03" OBS_VALUE="0.50456" BBK_DIFF_A="0.02423"/>
      <bbk:Obs TIME_PERIOD="2021-06-02" OBS_VALUE="0.48033" BBK_DIFF_A="0.03056"/>
      <bbk:Obs TIME_PERIOD="2021-06-01" OBS_VALUE="0.44977" BBK_DIFF_A="-0.04963"/>
      <bbk:Obs TIME_PERIOD="2021-05-31" OBS_VALUE="0.4994" BBK_DIFF_A="0.06013"/>
      <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="0.43927" BBK_DIFF_A="-0.01012"/>
      <bbk:Obs TIME_PERIOD="2021-05-27" OBS_VALUE="0.44939" BBK_DIFF_A="-0.04068"/>
      <bbk:Obs TIME_PERIOD="2021-05-26" OBS_VALUE="0.49007" BBK_DIFF_A="0.03761"/>
      <bbk:Obs TIME_PERIOD="2021-05-25" OBS_VALUE="0.45246" BBK_DIFF_A="0.00489"/>
      <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="0.44757" BBK_DIFF_A="-1.4E-4"/>
      <bbk:Obs TIME_PERIOD="2021-05-20" OBS_VALUE="0.44771" BBK_DIFF_A="5.15311"/>
      <bbk:Obs TIME_PERIOD="2021-05-19" OBS_VALUE="-4.7054" BBK_DIFF_A="0.11329"/>
      <bbk:Obs TIME_PERIOD="2021-05-18" OBS_VALUE="-4.81869" BBK_DIFF_A="0.51543"/>
      <bbk:Obs TIME_PERIOD="2021-05-17" OBS_VALUE="-5.33412" BBK_DIFF_A="-0.42983"/>
      <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="-4.90429" BBK_DIFF_A="-0.33486"/>
      <bbk:Obs TIME_PERIOD="2021-05-13" OBS_VALUE="-4.56943" BBK_DIFF_A="0.48849"/>
      <bbk:Obs TIME_PERIOD="2021-05-12" OBS_VALUE="-5.05792" BBK_DIFF_A="0.05854"/>
      <bbk:Obs TIME_PERIOD="2021-05-11" OBS_VALUE="-5.11646" BBK_DIFF_A="0.03742"/>
      <bbk:Obs TIME_PERIOD="2021-05-10" OBS_VALUE="-5.15388" BBK_DIFF_A="-5.56103"/>
      <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="0.40715" BBK_DIFF_A="0.12099"/>
      <bbk:Obs TIME_PERIOD="2021-05-06" OBS_VALUE="0.28616" BBK_DIFF_A="-0.11409"/>
      <bbk:Obs TIME_PERIOD="2021-05-05" OBS_VALUE="0.40025" BBK_DIFF_A="0.01221"/>
      <bbk:Obs TIME_PERIOD="2021-05-04" OBS_VALUE="0.38804" BBK_DIFF_A="5.14282"/>
      <bbk:Obs TIME_PERIOD="2021-05-03" OBS_VALUE="-4.75478" BBK_DIFF_A="0.32029"/>
      <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="-5.07507" BBK_DIFF_A="-0.31314"/>
      <bbk:Obs TIME_PERIOD="2021-04-29" OBS_VALUE="-4.76193" BBK_DIFF_A="0.20993"/>
      <bbk:Obs TIME_PERIOD="2021-04-28" OBS_VALUE="-4.97186" BBK_DIFF_A="0.0349"/>
      <bbk:Obs TIME_PERIOD="2021-04-27" OBS_VALUE="-5.00676" BBK_DIFF_A="-0.01538"/>
      <bbk:Obs TIME_PERIOD="2021-04-26" OBS_VALUE="-4.99138" BBK_DIFF_A="0.16638"/>
      <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="-5.15776" BBK_DIFF_A="-0.35584"/>
      <bbk:Obs TIME_PERIOD="2021-04-22" OBS_VALUE="-4.80192" BBK_DIFF_A="0.17088"/>
      <bbk:Obs TIME_PERIOD="2021-04-21" OBS_VALUE="-4.9728" BBK_DIFF_A="-0.05773"/>
      <bbk:Obs TIME_PERIOD="2021-04-20" OBS_VALUE="-4.91507" BBK_DIFF_A="-0.12545"/>
      <bbk:Obs TIME_PERIOD="2021-04-19" OBS_VALUE="-4.78962" BBK_DIFF_A="0.05504"/>
      <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="-4.84466" BBK_DIFF_A="0.73321"/>
      <bbk:Obs TIME_PERIOD="2021-04-15" OBS_VALUE="-5.57787" BBK_DIFF_A="-0.41505"/>
      <bbk:Obs TIME_PERIOD="2021-04-14" OBS_VALUE="-5.16282" BBK_DIFF_A="-0.06332"/>
      <bbk:Obs TIME_PERIOD="2021-04-13" OBS_VALUE="-5.0995" BBK_DIFF_A="0.29592"/>
      <bbk:Obs TIME_PERIOD="2021-04-12" OBS_VALUE="-5.39542" BBK_DIFF_A="-0.34523"/>
      <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="-5.05019" BBK_DIFF_A="-4.76398"/>
      <bbk:Obs TIME_PERIOD="2021-04-08" OBS_VALUE="-0.28621" BBK_DIFF_A="-0.00777"/>
      <bbk:Obs TIME_PERIOD="2021-04-07" OBS_VALUE="-0.27844" BBK_DIFF_A="0.02647"/>
      <bbk:Obs TIME_PERIOD="2021-04-06" OBS_VALUE="-0.30491" BBK_DIFF_A="-0.00685"/>
      <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="-0.29806" BBK_DIFF_A="0.05033"/>
      <bbk:Obs TIME_PERIOD="2021-03-31" OBS_VALUE="-0.34839" BBK_DIFF_A="-0.00404"/>
      <bbk:Obs TIME_PERIOD="2021-03-30" OBS_VALUE="-0.34435" BBK_DIFF_A="-0.0236"/>
      <bbk:Obs TIME_PERIOD="2021-03-29" OBS_VALUE="-0.32075" BBK_DIFF_A="0.08734"/>
      <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="-0.40809" BBK_DIFF_A="-0.095"/>
      <bbk:Obs TIME_PERIOD="2021-03-25" OBS_VALUE="-0.31309" BBK_DIFF_A="0.0716"/>
      <bbk:Obs TIME_PERIOD="2021-03-24" OBS_VALUE="-0.38469" BBK_DIFF_A="0.01604"/>
      <bbk:Obs TIME_PERIOD="2021-03-23" OBS_VALUE="-0.40073" BBK_DIFF_A="0.01419"/>
      <bbk:Obs TIME_PERIOD="2021-03-22" OBS_VALUE="-0.41492" BBK_DIFF_A="0.04165"/>
      <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="-0.45657" BBK_DIFF_A="-0.04811"/>
      <bbk:Obs TIME_PERIOD="2021-03-18" OBS_VALUE="-0.40846" BBK_DIFF_A="0.01435"/>
      <bbk:Obs TIME_PERIOD="2021-03-17" OBS_VALUE="-0.42281" BBK_DIFF_A="0.00319"/>
      <bbk:Obs TIME_PERIOD="2021-03-16" OBS_VALUE="-0.426" BBK_DIFF_A="0.00937"/>
      <bbk:Obs TIME_PERIOD="2021-03-15" OBS_VALUE="-0.43537" BBK_DIFF_A="0.0036"/>
      <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="-0.43897" BBK_DIFF_A="-0.04529"/>
      <bbk:Obs TIME_PERIOD="2021-03-11" OBS_VALUE="-0.39368" BBK_DIFF_A="0.24012"/>
      <bbk:Obs TIME_PERIOD="2021-03-10" OBS_VALUE="-0.6338" BBK_DIFF_A="-0.07309"/>
      <bbk:Obs TIME_PERIOD="2021-03-09" OBS_VALUE="-0.56071" BBK_DIFF_A="-0.16004"/>
      <bbk:Obs TIME_PERIOD="2021-03-08" OBS_VALUE="-0.40067" BBK_DIFF_A="0.05921"/>
      <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="-0.45988" BBK_DIFF_A="-0.02327"/>
      <bbk:Obs TIME_PERIOD="2021-03-04" OBS_VALUE="-0.43661" BBK_DIFF_A="0.12538"/>
      <bbk:Obs TIME_PERIOD="2021-03-03" OBS_VALUE="-0.56199" BBK_DIFF_A="-0.27618"/>
      <bbk:Obs TIME_PERIOD="2021-03-02" OBS_VALUE="-0.28581" BBK_DIFF_A="0.0471"/>
      <bbk:Obs TIME_PERIOD="2021-03-01" OBS_VALUE="-0.33291" BBK_DIFF_A="0.03481"/>
      <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="-0.36772" BBK_DIFF_A="0.04318"/>
      <bbk:Obs TIME_PERIOD="2021-02-25" OBS_VALUE="-0.4109" BBK_DIFF_A="0.00856"/>
      <bbk:Obs TIME_PERIOD="2021-02-24" OBS_VALUE="-0.41946" BBK_DIFF_A="0.01879"/>
      <bbk:Obs TIME_PERIOD="2021-02-23" OBS_VALUE="-0.43825" BBK_DIFF_A="-0.02888"/>
      <bbk:Obs TIME_PERIOD="2021-02-22" OBS_VALUE="-0.40937" BBK_DIFF_A="0.02985"/>
      <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="-0.43922" BBK_DIFF_A="-0.05829"/>
      <bbk:Obs TIME_PERIOD="2021-02-18" OBS_VALUE="-0.38093" BBK_DIFF_A="0.08174"/>
      <bbk:Obs TIME_PERIOD="2021-02-17" OBS_VALUE="-0.46267" BBK_DIFF_A="-0.00907"/>
      <bbk:Obs TIME_PERIOD="2021-02-16" OBS_VALUE="-0.4536" BBK_DIFF_A="-0.00801"/>
      <bbk:Obs TIME_PERIOD="2021-02-15" OBS_VALUE="-0.44559" BBK_DIFF_A="-0.02151"/>
      <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="-0.42408" BBK_DIFF_A="-0.02428"/>
      <bbk:Obs TIME_PERIOD="2021-02-11" OBS_VALUE="-0.3998" BBK_DIFF_A="0.07828"/>
      <bbk:Obs TIME_PERIOD="2021-02-10" OBS_VALUE="-0.47808" BBK_DIFF_A="-8.0E-4"/>
      <bbk:Obs TIME_PERIOD="2021-02-09" OBS_VALUE="-0.47728" BBK_DIFF_A="0.07991"/>
      <bbk:Obs TIME_PERIOD="2021-02-08" OBS_VALUE="-0.55719" BBK_DIFF_A="-0.04168"/>
      <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="-0.51551" BBK_DIFF_A="0.00257"/>
      <bbk:Obs TIME_PERIOD="2021-02-04" OBS_VALUE="-0.51808" BBK_DIFF_A="0.1112"/>
      <bbk:Obs TIME_PERIOD="2021-02-03" OBS_VALUE="-0.62928" BBK_DIFF_A="0.06382"/>
      <bbk:Obs TIME_PERIOD="2021-02-02" OBS_VALUE="-0.6931" BBK_DIFF_A="-0.10254"/>
      <bbk:Obs TIME_PERIOD="2021-02-01" OBS_VALUE="-0.59056" BBK_DIFF_A="0.04282"/>
      <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="-0.63338" BBK_DIFF_A="-0.08275"/>
      <bbk:Obs TIME_PERIOD="2021-01-28" OBS_VALUE="-0.55063" BBK_DIFF_A="-0.02478"/>
      <bbk:Obs TIME_PERIOD="2021-01-27" OBS_VALUE="-0.52585" BBK_DIFF_A="-0.01212"/>
      <bbk:Obs TIME_PERIOD="2021-01-26" OBS_VALUE="-0.51373" BBK_DIFF_A="0.0384"/>
      <bbk:Obs TIME_PERIOD="2021-01-25" OBS_VALUE="-0.55213" BBK_DIFF_A="0.10897"/>
      <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="-0.6611" BBK_DIFF_A="-0.24972"/>
      <bbk:Obs TIME_PERIOD="2021-01-21" OBS_VALUE="-0.41138" BBK_DIFF_A="0.05808"/>
      <bbk:Obs TIME_PERIOD="2021-01-20" OBS_VALUE="-0.46946" BBK_DIFF_A="0.18668"/>
      <bbk:Obs TIME_PERIOD="2021-01-19" OBS_VALUE="-0.65614" BBK_DIFF_A="-0.03383"/>
      <bbk:Obs TIME_PERIOD="2021-01-18" OBS_VALUE="-0.62231" BBK_DIFF_A="0.05877"/>
      <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="-0.68108" BBK_DIFF_A="8.11398"/>
      <bbk:Obs TIME_PERIOD="2021-01-14" OBS_VALUE="-8.79506" BBK_DIFF_A="0.08129"/>
      <bbk:Obs TIME_PERIOD="2021-01-13" OBS_VALUE="-8.87635" BBK_DIFF_A="-0.12397"/>
      <bbk:Obs TIME_PERIOD="2021-01-12" OBS_VALUE="-8.75238" BBK_DIFF_A="0.39045"/>
      <bbk:Obs TIME_PERIOD="2021-01-11" OBS_VALUE="-9.14283" BBK_DIFF_A="0.06278"/>
      <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="-9.20561" BBK_DIFF_A="-0.55439"/>
      <bbk:Obs TIME_PERIOD="2021-01-07" OBS_VALUE="-8.65122" BBK_DIFF_A="0.31155"/>
      <bbk:Obs TIME_PERIOD="2021-01-06" OBS_VALUE="-8.96277" BBK_DIFF_A="11.03723"/>
      <bbk:Obs TIME_PERIOD="2021-01-05" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2021-01-04" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <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="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2020-12-29" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2020-12-28" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <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="-20.0" BBK_DIFF_A="-11.71483"/>
      <bbk:Obs TIME_PERIOD="2020-12-22" OBS_VALUE="-8.28517" BBK_DIFF_A="0.24339"/>
      <bbk:Obs TIME_PERIOD="2020-12-21" OBS_VALUE="-8.52856" BBK_DIFF_A="0.77979"/>
      <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="-9.30835" BBK_DIFF_A="0.06194"/>
      <bbk:Obs TIME_PERIOD="2020-12-17" OBS_VALUE="-9.37029" BBK_DIFF_A="-0.49541"/>
      <bbk:Obs TIME_PERIOD="2020-12-16" OBS_VALUE="-8.87488" BBK_DIFF_A="-0.08717"/>
      <bbk:Obs TIME_PERIOD="2020-12-15" OBS_VALUE="-8.78771" BBK_DIFF_A="0.12676"/>
      <bbk:Obs TIME_PERIOD="2020-12-14" OBS_VALUE="-8.91447" BBK_DIFF_A="-5.99373"/>
      <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="-2.92074" BBK_DIFF_A="0.19648"/>
      <bbk:Obs TIME_PERIOD="2020-12-10" OBS_VALUE="-3.11722" BBK_DIFF_A="0.14409"/>
      <bbk:Obs TIME_PERIOD="2020-12-09" OBS_VALUE="-3.26131" BBK_DIFF_A="5.73439"/>
      <bbk:Obs TIME_PERIOD="2020-12-08" OBS_VALUE="-8.9957" BBK_DIFF_A="-5.82338"/>
      <bbk:Obs TIME_PERIOD="2020-12-07" OBS_VALUE="-3.17232" BBK_DIFF_A="0.26378"/>
      <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="-3.4361" BBK_DIFF_A="-0.20133"/>
      <bbk:Obs TIME_PERIOD="2020-12-03" OBS_VALUE="-3.23477" BBK_DIFF_A="0.15306"/>
      <bbk:Obs TIME_PERIOD="2020-12-02" OBS_VALUE="-3.38783" BBK_DIFF_A="-0.2239"/>
      <bbk:Obs TIME_PERIOD="2020-12-01" OBS_VALUE="-3.16393" BBK_DIFF_A="0.46996"/>
      <bbk:Obs TIME_PERIOD="2020-11-30" OBS_VALUE="-3.63389" BBK_DIFF_A="0.25987"/>
      <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="-3.89376" BBK_DIFF_A="0.22754"/>
      <bbk:Obs TIME_PERIOD="2020-11-26" OBS_VALUE="-4.1213" BBK_DIFF_A="0.73936"/>
      <bbk:Obs TIME_PERIOD="2020-11-25" OBS_VALUE="-4.86066" BBK_DIFF_A="0.08457"/>
      <bbk:Obs TIME_PERIOD="2020-11-24" OBS_VALUE="-4.94523" BBK_DIFF_A="1.27227"/>
      <bbk:Obs TIME_PERIOD="2020-11-23" OBS_VALUE="-6.2175" BBK_DIFF_A="0.21574"/>
      <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="-6.43324" BBK_DIFF_A="-0.06147"/>
      <bbk:Obs TIME_PERIOD="2020-11-19" OBS_VALUE="-6.37177" BBK_DIFF_A="-5.72042"/>
      <bbk:Obs TIME_PERIOD="2020-11-18" OBS_VALUE="-0.65135" BBK_DIFF_A="-0.1225"/>
      <bbk:Obs TIME_PERIOD="2020-11-17" OBS_VALUE="-0.52885" BBK_DIFF_A="0.12072"/>
      <bbk:Obs TIME_PERIOD="2020-11-16" OBS_VALUE="-0.64957" BBK_DIFF_A="0.0632"/>
      <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="-0.71277" BBK_DIFF_A="0.00256"/>
      <bbk:Obs TIME_PERIOD="2020-11-12" OBS_VALUE="-0.71533" BBK_DIFF_A="-0.26342"/>
      <bbk:Obs TIME_PERIOD="2020-11-11" OBS_VALUE="-0.45191" BBK_DIFF_A="-0.09735"/>
      <bbk:Obs TIME_PERIOD="2020-11-10" OBS_VALUE="-0.35456" BBK_DIFF_A="0.5293"/>
      <bbk:Obs TIME_PERIOD="2020-11-09" OBS_VALUE="-0.88386" BBK_DIFF_A="0.06953"/>
      <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="-0.95339" BBK_DIFF_A="-0.18514"/>
      <bbk:Obs TIME_PERIOD="2020-11-05" OBS_VALUE="-0.76825" BBK_DIFF_A="0.9528"/>
      <bbk:Obs TIME_PERIOD="2020-11-04" OBS_VALUE="-1.72105" BBK_DIFF_A="-0.01678"/>
      <bbk:Obs TIME_PERIOD="2020-11-03" OBS_VALUE="-1.70427" BBK_DIFF_A="-0.22359"/>
      <bbk:Obs TIME_PERIOD="2020-11-02" OBS_VALUE="-1.48068" BBK_DIFF_A="-0.37407"/>
      <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="-1.10661" BBK_DIFF_A="0.12339"/>
      <bbk:Obs TIME_PERIOD="2020-10-29" OBS_VALUE="-1.23" BBK_DIFF_A="-0.10959"/>
      <bbk:Obs TIME_PERIOD="2020-10-28" OBS_VALUE="-1.12041" BBK_DIFF_A="-0.1265"/>
      <bbk:Obs TIME_PERIOD="2020-10-27" OBS_VALUE="-0.99391" BBK_DIFF_A="0.20417"/>
      <bbk:Obs TIME_PERIOD="2020-10-26" OBS_VALUE="-1.19808" BBK_DIFF_A="-0.39191"/>
      <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="-0.80617" BBK_DIFF_A="0.13577"/>
      <bbk:Obs TIME_PERIOD="2020-10-22" OBS_VALUE="-0.94194" BBK_DIFF_A="0.16052"/>
      <bbk:Obs TIME_PERIOD="2020-10-21" OBS_VALUE="-1.10246" BBK_DIFF_A="-0.1086"/>
      <bbk:Obs TIME_PERIOD="2020-10-20" OBS_VALUE="-0.99386" BBK_DIFF_A="-0.43875"/>
      <bbk:Obs TIME_PERIOD="2020-10-19" OBS_VALUE="-0.55511" BBK_DIFF_A="0.50376"/>
      <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="-1.05887" BBK_DIFF_A="-0.09876"/>
      <bbk:Obs TIME_PERIOD="2020-10-15" OBS_VALUE="-0.96011" BBK_DIFF_A="-0.46326"/>
      <bbk:Obs TIME_PERIOD="2020-10-14" OBS_VALUE="-0.49685" BBK_DIFF_A="-0.08159"/>
      <bbk:Obs TIME_PERIOD="2020-10-13" OBS_VALUE="-0.41526" BBK_DIFF_A="-0.11031"/>
      <bbk:Obs TIME_PERIOD="2020-10-12" OBS_VALUE="-0.30495" BBK_DIFF_A="0.17231"/>
      <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="-0.47726" BBK_DIFF_A="-0.24585"/>
      <bbk:Obs TIME_PERIOD="2020-10-08" OBS_VALUE="-0.23141" BBK_DIFF_A="0.31284"/>
      <bbk:Obs TIME_PERIOD="2020-10-07" OBS_VALUE="-0.54425" BBK_DIFF_A="-0.09896"/>
      <bbk:Obs TIME_PERIOD="2020-10-06" OBS_VALUE="-0.44529" BBK_DIFF_A="0.36141"/>
      <bbk:Obs TIME_PERIOD="2020-10-05" OBS_VALUE="-0.8067" BBK_DIFF_A="-0.31679"/>
      <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="-0.48991" BBK_DIFF_A="-0.16645"/>
      <bbk:Obs TIME_PERIOD="2020-10-01" OBS_VALUE="-0.32346" BBK_DIFF_A="0.31557"/>
      <bbk:Obs TIME_PERIOD="2020-09-30" OBS_VALUE="-0.63903" BBK_DIFF_A="0.03979"/>
      <bbk:Obs TIME_PERIOD="2020-09-29" OBS_VALUE="-0.67882" BBK_DIFF_A="-0.22426"/>
      <bbk:Obs TIME_PERIOD="2020-09-28" OBS_VALUE="-0.45456" BBK_DIFF_A="0.18309"/>
      <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="-0.63765" BBK_DIFF_A="0.00644"/>
      <bbk:Obs TIME_PERIOD="2020-09-24" OBS_VALUE="-0.64409" BBK_DIFF_A="0.13229"/>
      <bbk:Obs TIME_PERIOD="2020-09-23" OBS_VALUE="-0.77638" BBK_DIFF_A="-0.1386"/>
      <bbk:Obs TIME_PERIOD="2020-09-22" OBS_VALUE="-0.63778" BBK_DIFF_A="0.14217"/>
      <bbk:Obs TIME_PERIOD="2020-09-21" OBS_VALUE="-0.77995" BBK_DIFF_A="0.26601"/>
      <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="-1.04596" BBK_DIFF_A="0.21532"/>
      <bbk:Obs TIME_PERIOD="2020-09-17" OBS_VALUE="-1.26128" BBK_DIFF_A="-0.35318"/>
      <bbk:Obs TIME_PERIOD="2020-09-16" OBS_VALUE="-0.9081" BBK_DIFF_A="0.17778"/>
      <bbk:Obs TIME_PERIOD="2020-09-15" OBS_VALUE="-1.08588" BBK_DIFF_A="0.11566"/>
      <bbk:Obs TIME_PERIOD="2020-09-14" OBS_VALUE="-1.20154" BBK_DIFF_A="0.4748"/>
      <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="-1.67634" BBK_DIFF_A="1.95904"/>
      <bbk:Obs TIME_PERIOD="2020-09-10" OBS_VALUE="-3.63538" BBK_DIFF_A="0.00179"/>
      <bbk:Obs TIME_PERIOD="2020-09-09" OBS_VALUE="-3.63717" BBK_DIFF_A="0.15489"/>
      <bbk:Obs TIME_PERIOD="2020-09-08" OBS_VALUE="-3.79206" BBK_DIFF_A="-0.09896"/>
      <bbk:Obs TIME_PERIOD="2020-09-07" OBS_VALUE="-3.6931" BBK_DIFF_A="0.3582"/>
      <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="-4.0513" BBK_DIFF_A="-0.07866"/>
      <bbk:Obs TIME_PERIOD="2020-09-03" OBS_VALUE="-3.97264" BBK_DIFF_A="4.67552"/>
      <bbk:Obs TIME_PERIOD="2020-09-02" OBS_VALUE="-8.64816" BBK_DIFF_A="0.36561"/>
      <bbk:Obs TIME_PERIOD="2020-09-01" OBS_VALUE="-9.01377" BBK_DIFF_A="0.24535"/>
      <bbk:Obs TIME_PERIOD="2020-08-31" OBS_VALUE="-9.25912" BBK_DIFF_A="-0.75054"/>
      <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="-8.50858" BBK_DIFF_A="-0.97743"/>
      <bbk:Obs TIME_PERIOD="2020-08-27" OBS_VALUE="-7.53115" BBK_DIFF_A="1.03289"/>
      <bbk:Obs TIME_PERIOD="2020-08-26" OBS_VALUE="-8.56404" BBK_DIFF_A="0.14299"/>
      <bbk:Obs TIME_PERIOD="2020-08-25" OBS_VALUE="-8.70703" BBK_DIFF_A="0.65285"/>
      <bbk:Obs TIME_PERIOD="2020-08-24" OBS_VALUE="-9.35988" BBK_DIFF_A="-0.44995"/>
      <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="-8.90993" BBK_DIFF_A="-0.07912"/>
      <bbk:Obs TIME_PERIOD="2020-08-20" OBS_VALUE="-8.83081" BBK_DIFF_A="-0.17113"/>
      <bbk:Obs TIME_PERIOD="2020-08-19" OBS_VALUE="-8.65968" BBK_DIFF_A="-0.13911"/>
      <bbk:Obs TIME_PERIOD="2020-08-18" OBS_VALUE="-8.52057" BBK_DIFF_A="0.26992"/>
      <bbk:Obs TIME_PERIOD="2020-08-17" OBS_VALUE="-8.79049" BBK_DIFF_A="0.12683"/>
      <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="-8.91732" BBK_DIFF_A="0.46462"/>
      <bbk:Obs TIME_PERIOD="2020-08-13" OBS_VALUE="-9.38194" BBK_DIFF_A="0.10036"/>
      <bbk:Obs TIME_PERIOD="2020-08-12" OBS_VALUE="-9.4823" BBK_DIFF_A="-0.26888"/>
      <bbk:Obs TIME_PERIOD="2020-08-11" OBS_VALUE="-9.21342" BBK_DIFF_A="-0.24037"/>
      <bbk:Obs TIME_PERIOD="2020-08-10" OBS_VALUE="-8.97305" BBK_DIFF_A="0.03549"/>
      <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="-9.00854" BBK_DIFF_A="0.48188"/>
      <bbk:Obs TIME_PERIOD="2020-08-06" OBS_VALUE="-9.49042" BBK_DIFF_A="-0.31263"/>
      <bbk:Obs TIME_PERIOD="2020-08-05" OBS_VALUE="-9.17779" BBK_DIFF_A="0.46578"/>
      <bbk:Obs TIME_PERIOD="2020-08-04" OBS_VALUE="-9.64357" BBK_DIFF_A="-0.38684"/>
      <bbk:Obs TIME_PERIOD="2020-08-03" OBS_VALUE="-9.25673" BBK_DIFF_A="-0.96065"/>
      <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="-8.29608" BBK_DIFF_A="0.54878"/>
      <bbk:Obs TIME_PERIOD="2020-07-30" OBS_VALUE="-8.84486" BBK_DIFF_A="-0.43512"/>
      <bbk:Obs TIME_PERIOD="2020-07-29" OBS_VALUE="-8.40974" BBK_DIFF_A="0.27527"/>
      <bbk:Obs TIME_PERIOD="2020-07-28" OBS_VALUE="-8.68501" BBK_DIFF_A="-0.09338"/>
      <bbk:Obs TIME_PERIOD="2020-07-27" OBS_VALUE="-8.59163" BBK_DIFF_A="0.05322"/>
      <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="-8.64485" BBK_DIFF_A="0.19725"/>
      <bbk:Obs TIME_PERIOD="2020-07-23" OBS_VALUE="-8.8421" BBK_DIFF_A="0.28767"/>
      <bbk:Obs TIME_PERIOD="2020-07-22" OBS_VALUE="-9.12977" BBK_DIFF_A="-0.02786"/>
      <bbk:Obs TIME_PERIOD="2020-07-21" OBS_VALUE="-9.10191" BBK_DIFF_A="-0.13102"/>
      <bbk:Obs TIME_PERIOD="2020-07-20" OBS_VALUE="-8.97089" BBK_DIFF_A="-0.27386"/>
      <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="-8.69703" BBK_DIFF_A="0.509"/>
      <bbk:Obs TIME_PERIOD="2020-07-16" OBS_VALUE="-9.20603" BBK_DIFF_A="-0.05086"/>
      <bbk:Obs TIME_PERIOD="2020-07-15" OBS_VALUE="-9.15517" BBK_DIFF_A="0.55481"/>
      <bbk:Obs TIME_PERIOD="2020-07-14" OBS_VALUE="-9.70998" BBK_DIFF_A="-0.62803"/>
      <bbk:Obs TIME_PERIOD="2020-07-13" OBS_VALUE="-9.08195" BBK_DIFF_A="0.60833"/>
      <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="-9.69028" BBK_DIFF_A="-0.90156"/>
      <bbk:Obs TIME_PERIOD="2020-07-09" OBS_VALUE="-8.78872" BBK_DIFF_A="0.12813"/>
      <bbk:Obs TIME_PERIOD="2020-07-08" OBS_VALUE="-8.91685" BBK_DIFF_A="0.514"/>
      <bbk:Obs TIME_PERIOD="2020-07-07" OBS_VALUE="-9.43085" BBK_DIFF_A="-0.33859"/>
      <bbk:Obs TIME_PERIOD="2020-07-06" OBS_VALUE="-9.09226" BBK_DIFF_A="-0.09264"/>
      <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="-8.99962" BBK_DIFF_A="0.40212"/>
      <bbk:Obs TIME_PERIOD="2020-07-02" OBS_VALUE="-9.40174" BBK_DIFF_A="-0.20396"/>
      <bbk:Obs TIME_PERIOD="2020-07-01" OBS_VALUE="-9.19778" BBK_DIFF_A="0.42074"/>
      <bbk:Obs TIME_PERIOD="2020-06-30" OBS_VALUE="-9.61852" BBK_DIFF_A="-0.12184"/>
      <bbk:Obs TIME_PERIOD="2020-06-29" OBS_VALUE="-9.49668" BBK_DIFF_A="-0.2455"/>
      <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="-9.25118" BBK_DIFF_A="0.44557"/>
      <bbk:Obs TIME_PERIOD="2020-06-25" OBS_VALUE="-9.69675" BBK_DIFF_A="-0.29516"/>
      <bbk:Obs TIME_PERIOD="2020-06-24" OBS_VALUE="-9.40159" BBK_DIFF_A="0.10652"/>
      <bbk:Obs TIME_PERIOD="2020-06-23" OBS_VALUE="-9.50811" BBK_DIFF_A="0.19841"/>
      <bbk:Obs TIME_PERIOD="2020-06-22" OBS_VALUE="-9.70652" BBK_DIFF_A="-0.00336"/>
      <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="-9.70316" BBK_DIFF_A="-0.49388"/>
      <bbk:Obs TIME_PERIOD="2020-06-18" OBS_VALUE="-9.20928" BBK_DIFF_A="0.02463"/>
      <bbk:Obs TIME_PERIOD="2020-06-17" OBS_VALUE="-9.23391" BBK_DIFF_A="-0.26758"/>
      <bbk:Obs TIME_PERIOD="2020-06-16" OBS_VALUE="-8.96633" BBK_DIFF_A="-0.11104"/>
      <bbk:Obs TIME_PERIOD="2020-06-15" OBS_VALUE="-8.85529" BBK_DIFF_A="0.79777"/>
      <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="-9.65306" BBK_DIFF_A="-0.84294"/>
      <bbk:Obs TIME_PERIOD="2020-06-11" OBS_VALUE="-8.81012" BBK_DIFF_A="-0.00775"/>
      <bbk:Obs TIME_PERIOD="2020-06-10" OBS_VALUE="-8.80237" BBK_DIFF_A="-0.15191"/>
      <bbk:Obs TIME_PERIOD="2020-06-09" OBS_VALUE="-8.65046" BBK_DIFF_A="0.23798"/>
      <bbk:Obs TIME_PERIOD="2020-06-08" OBS_VALUE="-8.88844" BBK_DIFF_A="-0.12689"/>
      <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="-8.76155" BBK_DIFF_A="-0.33395"/>
      <bbk:Obs TIME_PERIOD="2020-06-04" OBS_VALUE="-8.4276" BBK_DIFF_A="0.35973"/>
      <bbk:Obs TIME_PERIOD="2020-06-03" OBS_VALUE="-8.78733" BBK_DIFF_A="-0.1262"/>
      <bbk:Obs TIME_PERIOD="2020-06-02" OBS_VALUE="-8.66113" BBK_DIFF_A="0.14701"/>
      <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="-8.80814" BBK_DIFF_A="0.69172"/>
      <bbk:Obs TIME_PERIOD="2020-05-28" OBS_VALUE="-9.49986" BBK_DIFF_A="-0.31473"/>
      <bbk:Obs TIME_PERIOD="2020-05-27" OBS_VALUE="-9.18513" BBK_DIFF_A="0.01854"/>
      <bbk:Obs TIME_PERIOD="2020-05-26" OBS_VALUE="-9.20367" BBK_DIFF_A="0.11152"/>
      <bbk:Obs TIME_PERIOD="2020-05-25" OBS_VALUE="-9.31519" BBK_DIFF_A="0.03764"/>
      <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="-9.35283" BBK_DIFF_A="-0.00323"/>
      <bbk:Obs TIME_PERIOD="2020-05-21" OBS_VALUE="-9.3496" BBK_DIFF_A="0.12933"/>
      <bbk:Obs TIME_PERIOD="2020-05-20" OBS_VALUE="-9.47893" BBK_DIFF_A="0.10655"/>
      <bbk:Obs TIME_PERIOD="2020-05-19" OBS_VALUE="-9.58548" BBK_DIFF_A="-0.04241"/>
      <bbk:Obs TIME_PERIOD="2020-05-18" OBS_VALUE="-9.54307" BBK_DIFF_A="-0.22475"/>
      <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="-9.31832" BBK_DIFF_A="0.01275"/>
      <bbk:Obs TIME_PERIOD="2020-05-14" OBS_VALUE="-9.33107" BBK_DIFF_A="-0.03834"/>
      <bbk:Obs TIME_PERIOD="2020-05-13" OBS_VALUE="-9.29273" BBK_DIFF_A="0.12666"/>
      <bbk:Obs TIME_PERIOD="2020-05-12" OBS_VALUE="-9.41939" BBK_DIFF_A="-0.10739"/>
      <bbk:Obs TIME_PERIOD="2020-05-11" OBS_VALUE="-9.312" BBK_DIFF_A="0.0814"/>
      <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="-9.3934" BBK_DIFF_A="0.10858"/>
      <bbk:Obs TIME_PERIOD="2020-05-07" OBS_VALUE="-9.50198" BBK_DIFF_A="-0.36374"/>
      <bbk:Obs TIME_PERIOD="2020-05-06" OBS_VALUE="-9.13824" BBK_DIFF_A="-10.00018"/>
      <bbk:Obs TIME_PERIOD="2020-05-05" OBS_VALUE="0.86194" BBK_DIFF_A="0.4162"/>
      <bbk:Obs TIME_PERIOD="2020-05-04" OBS_VALUE="0.44574" BBK_DIFF_A="20.44574"/>
      <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="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2020-04-29" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2020-04-28" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2020-04-27" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <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="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2020-04-23" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2020-04-22" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2020-04-21" OBS_VALUE="-20.0" BBK_DIFF_A="-19.21452"/>
      <bbk:Obs TIME_PERIOD="2020-04-20" OBS_VALUE="-0.78548" BBK_DIFF_A="-0.28682"/>
      <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="-0.49866" BBK_DIFF_A="1.49469"/>
      <bbk:Obs TIME_PERIOD="2020-04-16" OBS_VALUE="-1.99335" BBK_DIFF_A="0.17628"/>
      <bbk:Obs TIME_PERIOD="2020-04-15" OBS_VALUE="-2.16963" BBK_DIFF_A="2.03971"/>
      <bbk:Obs TIME_PERIOD="2020-04-14" OBS_VALUE="-4.20934" BBK_DIFF_A="-1.80697"/>
      <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="-2.40237" BBK_DIFF_A="0.17057"/>
      <bbk:Obs TIME_PERIOD="2020-04-08" OBS_VALUE="-2.57294" BBK_DIFF_A="-0.59045"/>
      <bbk:Obs TIME_PERIOD="2020-04-07" OBS_VALUE="-1.98249" BBK_DIFF_A="-0.27287"/>
      <bbk:Obs TIME_PERIOD="2020-04-06" OBS_VALUE="-1.70962" BBK_DIFF_A="0.32949"/>
      <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="-2.03911" BBK_DIFF_A="8.07956"/>
      <bbk:Obs TIME_PERIOD="2020-04-02" OBS_VALUE="-10.11867" BBK_DIFF_A="-0.06138"/>
      <bbk:Obs TIME_PERIOD="2020-04-01" OBS_VALUE="-10.05729" BBK_DIFF_A="-0.29824"/>
      <bbk:Obs TIME_PERIOD="2020-03-31" OBS_VALUE="-9.75905" BBK_DIFF_A="0.18066"/>
      <bbk:Obs TIME_PERIOD="2020-03-30" OBS_VALUE="-9.93971" BBK_DIFF_A="0.14566"/>
      <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="-10.08537" BBK_DIFF_A="-3.68273"/>
      <bbk:Obs TIME_PERIOD="2020-03-26" OBS_VALUE="-6.40264" BBK_DIFF_A="2.40346"/>
      <bbk:Obs TIME_PERIOD="2020-03-25" OBS_VALUE="-8.8061" BBK_DIFF_A="0.03384"/>
      <bbk:Obs TIME_PERIOD="2020-03-24" OBS_VALUE="-8.83994" BBK_DIFF_A="0.03673"/>
      <bbk:Obs TIME_PERIOD="2020-03-23" OBS_VALUE="-8.87667" BBK_DIFF_A="0.75388"/>
      <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="-9.63055" BBK_DIFF_A="-6.78689"/>
      <bbk:Obs TIME_PERIOD="2020-03-19" OBS_VALUE="-2.84366" BBK_DIFF_A="0.00113"/>
      <bbk:Obs TIME_PERIOD="2020-03-18" OBS_VALUE="-2.84479" BBK_DIFF_A="-0.29492"/>
      <bbk:Obs TIME_PERIOD="2020-03-17" OBS_VALUE="-2.54987" BBK_DIFF_A="0.22339"/>
      <bbk:Obs TIME_PERIOD="2020-03-16" OBS_VALUE="-2.77326" BBK_DIFF_A="-0.23365"/>
      <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="-2.53961" BBK_DIFF_A="0.16166"/>
      <bbk:Obs TIME_PERIOD="2020-03-12" OBS_VALUE="-2.70127" BBK_DIFF_A="-0.18549"/>
      <bbk:Obs TIME_PERIOD="2020-03-11" OBS_VALUE="-2.51578" BBK_DIFF_A="0.58954"/>
      <bbk:Obs TIME_PERIOD="2020-03-10" OBS_VALUE="-3.10532" BBK_DIFF_A="-0.10296"/>
      <bbk:Obs TIME_PERIOD="2020-03-09" OBS_VALUE="-3.00236" BBK_DIFF_A="-2.63675"/>
      <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="-0.36561" BBK_DIFF_A="0.06118"/>
      <bbk:Obs TIME_PERIOD="2020-03-05" OBS_VALUE="-0.42679" BBK_DIFF_A="8.89622"/>
      <bbk:Obs TIME_PERIOD="2020-03-04" OBS_VALUE="-9.32301" BBK_DIFF_A="-0.28873"/>
      <bbk:Obs TIME_PERIOD="2020-03-03" OBS_VALUE="-9.03428" BBK_DIFF_A="-0.42329"/>
      <bbk:Obs TIME_PERIOD="2020-03-02" OBS_VALUE="-8.61099" BBK_DIFF_A="0.56768"/>
      <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="-9.17867" BBK_DIFF_A="0.04879"/>
      <bbk:Obs TIME_PERIOD="2020-02-27" OBS_VALUE="-9.22746" BBK_DIFF_A="0.02738"/>
      <bbk:Obs TIME_PERIOD="2020-02-26" OBS_VALUE="-9.25484" BBK_DIFF_A="-0.18312"/>
      <bbk:Obs TIME_PERIOD="2020-02-25" OBS_VALUE="-9.07172" BBK_DIFF_A="-0.82969"/>
      <bbk:Obs TIME_PERIOD="2020-02-24" OBS_VALUE="-8.24203" BBK_DIFF_A="0.94369"/>
      <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="-9.18572" BBK_DIFF_A="-1.58804"/>
      <bbk:Obs TIME_PERIOD="2020-02-20" OBS_VALUE="-7.59768" BBK_DIFF_A="1.07231"/>
      <bbk:Obs TIME_PERIOD="2020-02-19" OBS_VALUE="-8.66999" BBK_DIFF_A="0.38285"/>
      <bbk:Obs TIME_PERIOD="2020-02-18" OBS_VALUE="-9.05284" BBK_DIFF_A="-0.30895"/>
      <bbk:Obs TIME_PERIOD="2020-02-17" OBS_VALUE="-8.74389" BBK_DIFF_A="-0.0665"/>
      <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="-8.67739" BBK_DIFF_A="-0.26155"/>
      <bbk:Obs TIME_PERIOD="2020-02-13" OBS_VALUE="-8.41584" BBK_DIFF_A="0.24606"/>
      <bbk:Obs TIME_PERIOD="2020-02-12" OBS_VALUE="-8.6619" BBK_DIFF_A="0.29717"/>
      <bbk:Obs TIME_PERIOD="2020-02-11" OBS_VALUE="-8.95907" BBK_DIFF_A="-8.23814"/>
      <bbk:Obs TIME_PERIOD="2020-02-10" OBS_VALUE="-0.72093" BBK_DIFF_A="7.95019"/>
      <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="-8.67112" BBK_DIFF_A="0.34566"/>
      <bbk:Obs TIME_PERIOD="2020-02-06" OBS_VALUE="-9.01678" BBK_DIFF_A="-0.29456"/>
      <bbk:Obs TIME_PERIOD="2020-02-05" OBS_VALUE="-8.72222" BBK_DIFF_A="0.47394"/>
      <bbk:Obs TIME_PERIOD="2020-02-04" OBS_VALUE="-9.19616" BBK_DIFF_A="-0.49131"/>
      <bbk:Obs TIME_PERIOD="2020-02-03" OBS_VALUE="-8.70485" BBK_DIFF_A="0.26054"/>
      <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="-8.96539" BBK_DIFF_A="-0.71932"/>
      <bbk:Obs TIME_PERIOD="2020-01-30" OBS_VALUE="-8.24607" BBK_DIFF_A="-0.22573"/>
      <bbk:Obs TIME_PERIOD="2020-01-29" OBS_VALUE="-8.02034" BBK_DIFF_A="-0.00658"/>
      <bbk:Obs TIME_PERIOD="2020-01-28" OBS_VALUE="-8.01376" BBK_DIFF_A="0.58376"/>
      <bbk:Obs TIME_PERIOD="2020-01-27" OBS_VALUE="-8.59752" BBK_DIFF_A="-0.42798"/>
      <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="-8.16954" BBK_DIFF_A="-0.0895"/>
      <bbk:Obs TIME_PERIOD="2020-01-23" OBS_VALUE="-8.08004" BBK_DIFF_A="-0.27312"/>
      <bbk:Obs TIME_PERIOD="2020-01-22" OBS_VALUE="-7.80692" BBK_DIFF_A="0.2459"/>
      <bbk:Obs TIME_PERIOD="2020-01-21" OBS_VALUE="-8.05282" BBK_DIFF_A="-0.84471"/>
      <bbk:Obs TIME_PERIOD="2020-01-20" OBS_VALUE="-7.20811" BBK_DIFF_A="-1.1586"/>
      <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="-6.04951" BBK_DIFF_A="1.9727"/>
      <bbk:Obs TIME_PERIOD="2020-01-16" OBS_VALUE="-8.02221" BBK_DIFF_A="-0.3774"/>
      <bbk:Obs TIME_PERIOD="2020-01-15" OBS_VALUE="-7.64481" BBK_DIFF_A="-0.57512"/>
      <bbk:Obs TIME_PERIOD="2020-01-14" OBS_VALUE="-7.06969" BBK_DIFF_A="0.25875"/>
      <bbk:Obs TIME_PERIOD="2020-01-13" OBS_VALUE="-7.32844" BBK_DIFF_A="0.50343"/>
      <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="-7.83187" BBK_DIFF_A="-0.47667"/>
      <bbk:Obs TIME_PERIOD="2020-01-09" OBS_VALUE="-7.3552" BBK_DIFF_A="1.0047"/>
      <bbk:Obs TIME_PERIOD="2020-01-08" OBS_VALUE="-8.3599" BBK_DIFF_A="-0.35301"/>
      <bbk:Obs TIME_PERIOD="2020-01-07" OBS_VALUE="-8.00689" BBK_DIFF_A="0.04287"/>
      <bbk:Obs TIME_PERIOD="2020-01-06" OBS_VALUE="-8.04976" BBK_DIFF_A="0.27557"/>
      <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="-8.32533" BBK_DIFF_A="-1.55955"/>
      <bbk:Obs TIME_PERIOD="2020-01-02" OBS_VALUE="-6.76578" BBK_DIFF_A="1.1465"/>
      <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="-7.91228" BBK_DIFF_A="-0.04762"/>
      <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="-7.86466" BBK_DIFF_A="0.32852"/>
      <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="-8.19318" BBK_DIFF_A="0.26762"/>
      <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="-8.4608" BBK_DIFF_A="-0.08816"/>
      <bbk:Obs TIME_PERIOD="2019-12-19" OBS_VALUE="-8.37264" BBK_DIFF_A="-3.5444"/>
      <bbk:Obs TIME_PERIOD="2019-12-18" OBS_VALUE="-4.82824" BBK_DIFF_A="3.12593"/>
      <bbk:Obs TIME_PERIOD="2019-12-17" OBS_VALUE="-7.95417" BBK_DIFF_A="0.02388"/>
      <bbk:Obs TIME_PERIOD="2019-12-16" OBS_VALUE="-7.97805" BBK_DIFF_A="-0.08815"/>
      <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="-7.8899" BBK_DIFF_A="0.09873"/>
      <bbk:Obs TIME_PERIOD="2019-12-12" OBS_VALUE="-7.98863" BBK_DIFF_A="-3.51261"/>
      <bbk:Obs TIME_PERIOD="2019-12-11" OBS_VALUE="-4.47602" BBK_DIFF_A="3.24661"/>
      <bbk:Obs TIME_PERIOD="2019-12-10" OBS_VALUE="-7.72263" BBK_DIFF_A="-3.21766"/>
      <bbk:Obs TIME_PERIOD="2019-12-09" OBS_VALUE="-4.50497" BBK_DIFF_A="-0.05516"/>
      <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="-4.44981" BBK_DIFF_A="3.35855"/>
      <bbk:Obs TIME_PERIOD="2019-12-05" OBS_VALUE="-7.80836" BBK_DIFF_A="-3.54759"/>
      <bbk:Obs TIME_PERIOD="2019-12-04" OBS_VALUE="-4.26077" BBK_DIFF_A="0.15759"/>
      <bbk:Obs TIME_PERIOD="2019-12-03" OBS_VALUE="-4.41836" BBK_DIFF_A="-0.10624"/>
      <bbk:Obs TIME_PERIOD="2019-12-02" OBS_VALUE="-4.31212" BBK_DIFF_A="-0.05409"/>
      <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="-4.25803" BBK_DIFF_A="0.01175"/>
      <bbk:Obs TIME_PERIOD="2019-11-28" OBS_VALUE="-4.26978" BBK_DIFF_A="4.03391"/>
      <bbk:Obs TIME_PERIOD="2019-11-27" OBS_VALUE="-8.30369" BBK_DIFF_A="-0.04048"/>
      <bbk:Obs TIME_PERIOD="2019-11-26" OBS_VALUE="-8.26321" BBK_DIFF_A="0.10237"/>
      <bbk:Obs TIME_PERIOD="2019-11-25" OBS_VALUE="-8.36558" BBK_DIFF_A="-0.36626"/>
      <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="-7.99932" BBK_DIFF_A="0.1933"/>
      <bbk:Obs TIME_PERIOD="2019-11-21" OBS_VALUE="-8.19262" BBK_DIFF_A="0.01078"/>
      <bbk:Obs TIME_PERIOD="2019-11-20" OBS_VALUE="-8.2034" BBK_DIFF_A="-0.01661"/>
      <bbk:Obs TIME_PERIOD="2019-11-19" OBS_VALUE="-8.18679" BBK_DIFF_A="-3.98758"/>
      <bbk:Obs TIME_PERIOD="2019-11-18" OBS_VALUE="-4.19921" BBK_DIFF_A="0.63786"/>
      <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="-4.83707" BBK_DIFF_A="-0.52843"/>
      <bbk:Obs TIME_PERIOD="2019-11-14" OBS_VALUE="-4.30864" BBK_DIFF_A="-0.75968"/>
      <bbk:Obs TIME_PERIOD="2019-11-13" OBS_VALUE="-3.54896" BBK_DIFF_A="-0.27382"/>
      <bbk:Obs TIME_PERIOD="2019-11-12" OBS_VALUE="-3.27514" BBK_DIFF_A="0.27674"/>
      <bbk:Obs TIME_PERIOD="2019-11-11" OBS_VALUE="-3.55188" BBK_DIFF_A="0.8206"/>
      <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="-4.37248" BBK_DIFF_A="-1.27307"/>
      <bbk:Obs TIME_PERIOD="2019-11-07" OBS_VALUE="-3.09941" BBK_DIFF_A="-0.19855"/>
      <bbk:Obs TIME_PERIOD="2019-11-06" OBS_VALUE="-2.90086" BBK_DIFF_A="-0.29085"/>
      <bbk:Obs TIME_PERIOD="2019-11-05" OBS_VALUE="-2.61001" BBK_DIFF_A="0.75688"/>
      <bbk:Obs TIME_PERIOD="2019-11-04" OBS_VALUE="-3.36689" BBK_DIFF_A="-0.37527"/>
      <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="-2.99162" BBK_DIFF_A="0.41212"/>
      <bbk:Obs TIME_PERIOD="2019-10-31" OBS_VALUE="-3.40374" BBK_DIFF_A="-1.35144"/>
      <bbk:Obs TIME_PERIOD="2019-10-30" OBS_VALUE="-2.0523" BBK_DIFF_A="0.01682"/>
      <bbk:Obs TIME_PERIOD="2019-10-29" OBS_VALUE="-2.06912" BBK_DIFF_A="-0.14854"/>
      <bbk:Obs TIME_PERIOD="2019-10-28" OBS_VALUE="-1.92058" BBK_DIFF_A="5.25788"/>
      <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="-7.17846" BBK_DIFF_A="-6.47103"/>
      <bbk:Obs TIME_PERIOD="2019-10-24" OBS_VALUE="-0.70743" BBK_DIFF_A="-1.6393"/>
      <bbk:Obs TIME_PERIOD="2019-10-23" OBS_VALUE="0.93187" BBK_DIFF_A="0.01627"/>
      <bbk:Obs TIME_PERIOD="2019-10-22" OBS_VALUE="0.9156" BBK_DIFF_A="-0.03759"/>
      <bbk:Obs TIME_PERIOD="2019-10-21" OBS_VALUE="0.95319" BBK_DIFF_A="0.21559"/>
      <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="0.7376" BBK_DIFF_A="-0.31524"/>
      <bbk:Obs TIME_PERIOD="2019-10-17" OBS_VALUE="1.05284" BBK_DIFF_A="-0.01515"/>
      <bbk:Obs TIME_PERIOD="2019-10-16" OBS_VALUE="1.06799" BBK_DIFF_A="8.19692"/>
      <bbk:Obs TIME_PERIOD="2019-10-15" OBS_VALUE="-7.12893" BBK_DIFF_A="0.08893"/>
      <bbk:Obs TIME_PERIOD="2019-10-14" OBS_VALUE="-7.21786" BBK_DIFF_A="0.50785"/>
      <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="-7.72571" BBK_DIFF_A="0.66707"/>
      <bbk:Obs TIME_PERIOD="2019-10-10" OBS_VALUE="-8.39278" BBK_DIFF_A="-0.38769"/>
      <bbk:Obs TIME_PERIOD="2019-10-09" OBS_VALUE="-8.00509" BBK_DIFF_A="-0.09278"/>
      <bbk:Obs TIME_PERIOD="2019-10-08" OBS_VALUE="-7.91231" BBK_DIFF_A="0.00495"/>
      <bbk:Obs TIME_PERIOD="2019-10-07" OBS_VALUE="-7.91726" BBK_DIFF_A="0.23237"/>
      <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="-8.14963" BBK_DIFF_A="-0.15958"/>
      <bbk:Obs TIME_PERIOD="2019-10-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-10-02" OBS_VALUE="-7.99005" BBK_DIFF_A="-0.1862"/>
      <bbk:Obs TIME_PERIOD="2019-10-01" OBS_VALUE="-7.80385" BBK_DIFF_A="-0.27767"/>
      <bbk:Obs TIME_PERIOD="2019-09-30" OBS_VALUE="-7.52618" BBK_DIFF_A="-0.16816"/>
      <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="-7.35802" BBK_DIFF_A="-0.14648"/>
      <bbk:Obs TIME_PERIOD="2019-09-26" OBS_VALUE="-7.21154" BBK_DIFF_A="0.53993"/>
      <bbk:Obs TIME_PERIOD="2019-09-25" OBS_VALUE="-7.75147" BBK_DIFF_A="-0.6095"/>
      <bbk:Obs TIME_PERIOD="2019-09-24" OBS_VALUE="-7.14197" BBK_DIFF_A="0.03979"/>
      <bbk:Obs TIME_PERIOD="2019-09-23" OBS_VALUE="-7.18176" BBK_DIFF_A="-0.03172"/>
      <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="-7.15004" BBK_DIFF_A="0.05336"/>
      <bbk:Obs TIME_PERIOD="2019-09-19" OBS_VALUE="-7.2034" BBK_DIFF_A="0.08357"/>
      <bbk:Obs TIME_PERIOD="2019-09-18" OBS_VALUE="-7.28697" BBK_DIFF_A="-6.04954"/>
      <bbk:Obs TIME_PERIOD="2019-09-17" OBS_VALUE="-1.23743" BBK_DIFF_A="-0.07366"/>
      <bbk:Obs TIME_PERIOD="2019-09-16" OBS_VALUE="-1.16377" BBK_DIFF_A="-0.17649"/>
      <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="-0.98728" BBK_DIFF_A="0.37237"/>
      <bbk:Obs TIME_PERIOD="2019-09-12" OBS_VALUE="-1.35965" BBK_DIFF_A="0.07433"/>
      <bbk:Obs TIME_PERIOD="2019-09-11" OBS_VALUE="-1.43398" BBK_DIFF_A="-0.00955"/>
      <bbk:Obs TIME_PERIOD="2019-09-10" OBS_VALUE="-1.42443" BBK_DIFF_A="-0.14508"/>
      <bbk:Obs TIME_PERIOD="2019-09-09" OBS_VALUE="-1.27935" BBK_DIFF_A="-2.78004"/>
      <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="1.50069" BBK_DIFF_A="-0.05506"/>
      <bbk:Obs TIME_PERIOD="2019-09-05" OBS_VALUE="1.55575" BBK_DIFF_A="-0.04614"/>
      <bbk:Obs TIME_PERIOD="2019-09-04" OBS_VALUE="1.60189" BBK_DIFF_A="10.43716"/>
      <bbk:Obs TIME_PERIOD="2019-09-03" OBS_VALUE="-8.83527" BBK_DIFF_A="-0.14674"/>
      <bbk:Obs TIME_PERIOD="2019-09-02" OBS_VALUE="-8.68853" BBK_DIFF_A="-0.34568"/>
      <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="-8.34285" BBK_DIFF_A="-7.19189"/>
      <bbk:Obs TIME_PERIOD="2019-08-29" OBS_VALUE="-1.15096" BBK_DIFF_A="0.18569"/>
      <bbk:Obs TIME_PERIOD="2019-08-28" OBS_VALUE="-1.33665" BBK_DIFF_A="0.05232"/>
      <bbk:Obs TIME_PERIOD="2019-08-27" OBS_VALUE="-1.38897" BBK_DIFF_A="-0.01397"/>
      <bbk:Obs TIME_PERIOD="2019-08-26" OBS_VALUE="-1.375" BBK_DIFF_A="-0.11358"/>
      <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="-1.26142" BBK_DIFF_A="-0.02017"/>
      <bbk:Obs TIME_PERIOD="2019-08-22" OBS_VALUE="-1.24125" BBK_DIFF_A="-0.05343"/>
      <bbk:Obs TIME_PERIOD="2019-08-21" OBS_VALUE="-1.18782" BBK_DIFF_A="0.23972"/>
      <bbk:Obs TIME_PERIOD="2019-08-20" OBS_VALUE="-1.42754" BBK_DIFF_A="-0.15475"/>
      <bbk:Obs TIME_PERIOD="2019-08-19" OBS_VALUE="-1.27279" BBK_DIFF_A="0.20045"/>
      <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="-1.47324" BBK_DIFF_A="-0.02562"/>
      <bbk:Obs TIME_PERIOD="2019-08-15" OBS_VALUE="-1.44762" BBK_DIFF_A="0.01518"/>
      <bbk:Obs TIME_PERIOD="2019-08-14" OBS_VALUE="-1.4628" BBK_DIFF_A="-0.13104"/>
      <bbk:Obs TIME_PERIOD="2019-08-13" OBS_VALUE="-1.33176" BBK_DIFF_A="-3.31535"/>
      <bbk:Obs TIME_PERIOD="2019-08-12" OBS_VALUE="1.98359" BBK_DIFF_A="3.28301"/>
      <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="-1.29942" BBK_DIFF_A="-0.03317"/>
      <bbk:Obs TIME_PERIOD="2019-08-08" OBS_VALUE="-1.26625" BBK_DIFF_A="-3.22903"/>
      <bbk:Obs TIME_PERIOD="2019-08-07" OBS_VALUE="1.96278" BBK_DIFF_A="0.24231"/>
      <bbk:Obs TIME_PERIOD="2019-08-06" OBS_VALUE="1.72047" BBK_DIFF_A="1.48821"/>
      <bbk:Obs TIME_PERIOD="2019-08-05" OBS_VALUE="0.23226" BBK_DIFF_A="-1.29326"/>
      <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="1.52552" BBK_DIFF_A="0.19466"/>
      <bbk:Obs TIME_PERIOD="2019-08-01" OBS_VALUE="1.33086" BBK_DIFF_A="0.44808"/>
      <bbk:Obs TIME_PERIOD="2019-07-31" OBS_VALUE="0.88278" BBK_DIFF_A="-0.2228"/>
      <bbk:Obs TIME_PERIOD="2019-07-30" OBS_VALUE="1.10558" BBK_DIFF_A="0.17905"/>
      <bbk:Obs TIME_PERIOD="2019-07-29" OBS_VALUE="0.92653" BBK_DIFF_A="-0.21812"/>
      <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="1.14465" BBK_DIFF_A="0.34599"/>
      <bbk:Obs TIME_PERIOD="2019-07-25" OBS_VALUE="0.79866" BBK_DIFF_A="8.76706"/>
      <bbk:Obs TIME_PERIOD="2019-07-24" OBS_VALUE="-7.9684" BBK_DIFF_A="-8.77875"/>
      <bbk:Obs TIME_PERIOD="2019-07-23" OBS_VALUE="0.81035" BBK_DIFF_A="-0.22908"/>
      <bbk:Obs TIME_PERIOD="2019-07-22" OBS_VALUE="1.03943" BBK_DIFF_A="0.58042"/>
      <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="0.45901" BBK_DIFF_A="-0.45876"/>
      <bbk:Obs TIME_PERIOD="2019-07-18" OBS_VALUE="0.91777" BBK_DIFF_A="-0.155"/>
      <bbk:Obs TIME_PERIOD="2019-07-17" OBS_VALUE="1.07277" BBK_DIFF_A="0.06734"/>
      <bbk:Obs TIME_PERIOD="2019-07-16" OBS_VALUE="1.00543" BBK_DIFF_A="-0.19947"/>
      <bbk:Obs TIME_PERIOD="2019-07-15" OBS_VALUE="1.2049" BBK_DIFF_A="-0.19832"/>
      <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="1.40322" BBK_DIFF_A="2.54989"/>
      <bbk:Obs TIME_PERIOD="2019-07-11" OBS_VALUE="-1.14667" BBK_DIFF_A="0.05199"/>
      <bbk:Obs TIME_PERIOD="2019-07-10" OBS_VALUE="-1.19866" BBK_DIFF_A="0.12987"/>
      <bbk:Obs TIME_PERIOD="2019-07-09" OBS_VALUE="-1.32853" BBK_DIFF_A="-19.0208"/>
      <bbk:Obs TIME_PERIOD="2019-07-08" OBS_VALUE="17.69227" BBK_DIFF_A="23.36699"/>
      <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="-5.67472" BBK_DIFF_A="-4.10618"/>
      <bbk:Obs TIME_PERIOD="2019-07-04" OBS_VALUE="-1.56854" BBK_DIFF_A="-0.02857"/>
      <bbk:Obs TIME_PERIOD="2019-07-03" OBS_VALUE="-1.53997" BBK_DIFF_A="0.08316"/>
      <bbk:Obs TIME_PERIOD="2019-07-02" OBS_VALUE="-1.62313" BBK_DIFF_A="0.05288"/>
      <bbk:Obs TIME_PERIOD="2019-07-01" OBS_VALUE="-1.67601" BBK_DIFF_A="-0.06239"/>
      <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="-1.61362" BBK_DIFF_A="0.07344"/>
      <bbk:Obs TIME_PERIOD="2019-06-27" OBS_VALUE="-1.68706" BBK_DIFF_A="-1.35692"/>
      <bbk:Obs TIME_PERIOD="2019-06-26" OBS_VALUE="-0.33014" BBK_DIFF_A="-1.23767"/>
      <bbk:Obs TIME_PERIOD="2019-06-25" OBS_VALUE="0.90753" BBK_DIFF_A="2.13924"/>
      <bbk:Obs TIME_PERIOD="2019-06-24" OBS_VALUE="-1.23171" BBK_DIFF_A="0.35071"/>
      <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="-1.58242" BBK_DIFF_A="-0.20712"/>
      <bbk:Obs TIME_PERIOD="2019-06-20" OBS_VALUE="-1.3753" BBK_DIFF_A="0.48931"/>
      <bbk:Obs TIME_PERIOD="2019-06-19" OBS_VALUE="-1.86461" BBK_DIFF_A="-0.27179"/>
      <bbk:Obs TIME_PERIOD="2019-06-18" OBS_VALUE="-1.59282" BBK_DIFF_A="0.35527"/>
      <bbk:Obs TIME_PERIOD="2019-06-17" OBS_VALUE="-1.94809" BBK_DIFF_A="2.90749"/>
      <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="-4.85558" BBK_DIFF_A="-3.76163"/>
      <bbk:Obs TIME_PERIOD="2019-06-13" OBS_VALUE="-1.09395" BBK_DIFF_A="-0.35988"/>
      <bbk:Obs TIME_PERIOD="2019-06-12" OBS_VALUE="-0.73407" BBK_DIFF_A="-0.15872"/>
      <bbk:Obs TIME_PERIOD="2019-06-11" OBS_VALUE="-0.57535" BBK_DIFF_A="0.01869"/>
      <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="-0.59404" BBK_DIFF_A="1.05491"/>
      <bbk:Obs TIME_PERIOD="2019-06-06" OBS_VALUE="-1.64895" BBK_DIFF_A="13.20244"/>
      <bbk:Obs TIME_PERIOD="2019-06-05" OBS_VALUE="-14.85139" BBK_DIFF_A="1.81657"/>
      <bbk:Obs TIME_PERIOD="2019-06-04" OBS_VALUE="-16.66796" BBK_DIFF_A="-5.52004"/>
      <bbk:Obs TIME_PERIOD="2019-06-03" OBS_VALUE="-11.14792" BBK_DIFF_A="0.29408"/>
      <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="-11.442" BBK_DIFF_A="-0.65546"/>
      <bbk:Obs TIME_PERIOD="2019-05-30" OBS_VALUE="-10.78654" BBK_DIFF_A="-4.20297"/>
      <bbk:Obs TIME_PERIOD="2019-05-29" OBS_VALUE="-6.58357" BBK_DIFF_A="-0.27992"/>
      <bbk:Obs TIME_PERIOD="2019-05-28" OBS_VALUE="-6.30365" BBK_DIFF_A="-0.25179"/>
      <bbk:Obs TIME_PERIOD="2019-05-27" OBS_VALUE="-6.05186" BBK_DIFF_A="-1.63398"/>
      <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="-4.41788" BBK_DIFF_A="-2.44166"/>
      <bbk:Obs TIME_PERIOD="2019-05-23" OBS_VALUE="-1.97622" BBK_DIFF_A="0.35274"/>
      <bbk:Obs TIME_PERIOD="2019-05-22" OBS_VALUE="-2.32896" BBK_DIFF_A="0.02101"/>
      <bbk:Obs TIME_PERIOD="2019-05-21" OBS_VALUE="-2.34997" BBK_DIFF_A="17.65003"/>
      <bbk:Obs TIME_PERIOD="2019-05-20" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <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="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2019-05-16" OBS_VALUE="-20.0" BBK_DIFF_A="-14.81879"/>
      <bbk:Obs TIME_PERIOD="2019-05-15" OBS_VALUE="-5.18121" BBK_DIFF_A="0.05036"/>
      <bbk:Obs TIME_PERIOD="2019-05-14" OBS_VALUE="-5.23157" BBK_DIFF_A="-0.01272"/>
      <bbk:Obs TIME_PERIOD="2019-05-13" OBS_VALUE="-5.21885" BBK_DIFF_A="0.06175"/>
      <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="-5.2806" BBK_DIFF_A="0.02817"/>
      <bbk:Obs TIME_PERIOD="2019-05-09" OBS_VALUE="-5.30877" BBK_DIFF_A="0.12145"/>
      <bbk:Obs TIME_PERIOD="2019-05-08" OBS_VALUE="-5.43022" BBK_DIFF_A="-0.05216"/>
      <bbk:Obs TIME_PERIOD="2019-05-07" OBS_VALUE="-5.37806" BBK_DIFF_A="0.01532"/>
      <bbk:Obs TIME_PERIOD="2019-05-06" OBS_VALUE="-5.39338" BBK_DIFF_A="0.00273"/>
      <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="-5.39611" BBK_DIFF_A="0.04022"/>
      <bbk:Obs TIME_PERIOD="2019-05-02" OBS_VALUE="-5.43633" BBK_DIFF_A="-0.03826"/>
      <bbk:Obs TIME_PERIOD="2019-05-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2019-04-30" OBS_VALUE="-5.39807" BBK_DIFF_A="-0.09185"/>
      <bbk:Obs TIME_PERIOD="2019-04-29" OBS_VALUE="-5.30622" BBK_DIFF_A="14.69378"/>
      <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="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2019-04-25" OBS_VALUE="-20.0" BBK_DIFF_A="-2.47174"/>
      <bbk:Obs TIME_PERIOD="2019-04-24" OBS_VALUE="-17.52826" BBK_DIFF_A="-16.25837"/>
      <bbk:Obs TIME_PERIOD="2019-04-23" OBS_VALUE="-1.26989" BBK_DIFF_A="3.20462"/>
      <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="-4.47451" BBK_DIFF_A="0.77271"/>
      <bbk:Obs TIME_PERIOD="2019-04-17" OBS_VALUE="-5.24722" BBK_DIFF_A="0.08237"/>
      <bbk:Obs TIME_PERIOD="2019-04-16" OBS_VALUE="-5.32959" BBK_DIFF_A="0.08198"/>
      <bbk:Obs TIME_PERIOD="2019-04-15" OBS_VALUE="-5.41157" BBK_DIFF_A="0.33069"/>
      <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="-5.74226" BBK_DIFF_A="0.05654"/>
      <bbk:Obs TIME_PERIOD="2019-04-11" OBS_VALUE="-5.7988" BBK_DIFF_A="-0.14068"/>
      <bbk:Obs TIME_PERIOD="2019-04-10" OBS_VALUE="-5.65812" BBK_DIFF_A="0.04801"/>
      <bbk:Obs TIME_PERIOD="2019-04-09" OBS_VALUE="-5.70613" BBK_DIFF_A="-0.11339"/>
      <bbk:Obs TIME_PERIOD="2019-04-08" OBS_VALUE="-5.59274" BBK_DIFF_A="0.03633"/>
      <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="-5.62907" BBK_DIFF_A="0.04649"/>
      <bbk:Obs TIME_PERIOD="2019-04-04" OBS_VALUE="-5.67556" BBK_DIFF_A="-0.0025"/>
      <bbk:Obs TIME_PERIOD="2019-04-03" OBS_VALUE="-5.67306" BBK_DIFF_A="-0.03798"/>
      <bbk:Obs TIME_PERIOD="2019-04-02" OBS_VALUE="-5.63508" BBK_DIFF_A="0.17015"/>
      <bbk:Obs TIME_PERIOD="2019-04-01" OBS_VALUE="-5.80523" BBK_DIFF_A="-0.24996"/>
      <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="-5.55527" BBK_DIFF_A="0.08612"/>
      <bbk:Obs TIME_PERIOD="2019-03-28" OBS_VALUE="-5.64139" BBK_DIFF_A="-0.33771"/>
      <bbk:Obs TIME_PERIOD="2019-03-27" OBS_VALUE="-5.30368" BBK_DIFF_A="0.21894"/>
      <bbk:Obs TIME_PERIOD="2019-03-26" OBS_VALUE="-5.52262" BBK_DIFF_A="-22.95765"/>
      <bbk:Obs TIME_PERIOD="2019-03-25" OBS_VALUE="17.43503" BBK_DIFF_A="0.83174"/>
      <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="16.60329" BBK_DIFF_A="-0.04314"/>
      <bbk:Obs TIME_PERIOD="2019-03-21" OBS_VALUE="16.64643" BBK_DIFF_A="-0.02131"/>
      <bbk:Obs TIME_PERIOD="2019-03-20" OBS_VALUE="16.66774" BBK_DIFF_A="-0.02605"/>
      <bbk:Obs TIME_PERIOD="2019-03-19" OBS_VALUE="16.69379" BBK_DIFF_A="-0.03544"/>
      <bbk:Obs TIME_PERIOD="2019-03-18" OBS_VALUE="16.72923" BBK_DIFF_A="-0.505"/>
      <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="17.23423" BBK_DIFF_A="-0.06328"/>
      <bbk:Obs TIME_PERIOD="2019-03-14" OBS_VALUE="17.29751" BBK_DIFF_A="22.83335"/>
      <bbk:Obs TIME_PERIOD="2019-03-13" OBS_VALUE="-5.53584" BBK_DIFF_A="-0.01994"/>
      <bbk:Obs TIME_PERIOD="2019-03-12" OBS_VALUE="-5.5159" BBK_DIFF_A="-22.80356"/>
      <bbk:Obs TIME_PERIOD="2019-03-11" OBS_VALUE="17.28766" BBK_DIFF_A="0.33134"/>
      <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="16.95632" BBK_DIFF_A="-0.21012"/>
      <bbk:Obs TIME_PERIOD="2019-03-07" OBS_VALUE="17.16644" BBK_DIFF_A="0.0675"/>
      <bbk:Obs TIME_PERIOD="2019-03-06" OBS_VALUE="17.09894" BBK_DIFF_A="-0.01483"/>
      <bbk:Obs TIME_PERIOD="2019-03-05" OBS_VALUE="17.11377" BBK_DIFF_A="-0.04768"/>
      <bbk:Obs TIME_PERIOD="2019-03-04" OBS_VALUE="17.16145" BBK_DIFF_A="37.16145"/>
      <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="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2019-02-28" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2019-02-27" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2019-02-26" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2019-02-25" OBS_VALUE="-20.0" BBK_DIFF_A="-14.37566"/>
      <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="-5.62434" BBK_DIFF_A="-0.09414"/>
      <bbk:Obs TIME_PERIOD="2019-02-21" OBS_VALUE="-5.5302" BBK_DIFF_A="-0.0398"/>
      <bbk:Obs TIME_PERIOD="2019-02-20" OBS_VALUE="-5.4904" BBK_DIFF_A="-25.4904"/>
      <bbk:Obs TIME_PERIOD="2019-02-19" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2019-02-18" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <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="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2019-02-14" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2019-02-13" OBS_VALUE="20.0" BBK_DIFF_A="25.4771"/>
      <bbk:Obs TIME_PERIOD="2019-02-12" OBS_VALUE="-5.4771" BBK_DIFF_A="-25.4771"/>
      <bbk:Obs TIME_PERIOD="2019-02-11" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <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="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2019-02-07" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2019-02-06" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2019-02-05" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2019-02-04" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <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="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2019-01-31" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2019-01-30" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2019-01-29" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2019-01-28" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <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="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2019-01-24" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2019-01-23" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2019-01-22" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2019-01-21" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <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="20.0" BBK_DIFF_A="3.39275"/>
      <bbk:Obs TIME_PERIOD="2019-01-17" OBS_VALUE="16.60725" BBK_DIFF_A="0.01684"/>
      <bbk:Obs TIME_PERIOD="2019-01-16" OBS_VALUE="16.59041" BBK_DIFF_A="-0.0011"/>
      <bbk:Obs TIME_PERIOD="2019-01-15" OBS_VALUE="16.59151" BBK_DIFF_A="-0.00556"/>
      <bbk:Obs TIME_PERIOD="2019-01-14" OBS_VALUE="16.59707" BBK_DIFF_A="-0.0526"/>
      <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="16.64967" BBK_DIFF_A="0.02494"/>
      <bbk:Obs TIME_PERIOD="2019-01-10" OBS_VALUE="16.62473" BBK_DIFF_A="-0.15697"/>
      <bbk:Obs TIME_PERIOD="2019-01-09" OBS_VALUE="16.7817" BBK_DIFF_A="22.62004"/>
      <bbk:Obs TIME_PERIOD="2019-01-08" OBS_VALUE="-5.83834" BBK_DIFF_A="0.14744"/>
      <bbk:Obs TIME_PERIOD="2019-01-07" OBS_VALUE="-5.98578" BBK_DIFF_A="-0.023"/>
      <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="-5.96278" BBK_DIFF_A="-0.2199"/>
      <bbk:Obs TIME_PERIOD="2019-01-03" OBS_VALUE="-5.74288" BBK_DIFF_A="-0.02931"/>
      <bbk:Obs TIME_PERIOD="2019-01-02" OBS_VALUE="-5.71357" BBK_DIFF_A="-0.14043"/>
      <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="-5.57314" BBK_DIFF_A="-0.00683"/>
      <bbk:Obs TIME_PERIOD="2018-12-27" OBS_VALUE="-5.56631" BBK_DIFF_A="0.57687"/>
      <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="-6.14318" BBK_DIFF_A="0.01151"/>
      <bbk:Obs TIME_PERIOD="2018-12-20" OBS_VALUE="-6.15469" BBK_DIFF_A="-0.07778"/>
      <bbk:Obs TIME_PERIOD="2018-12-19" OBS_VALUE="-6.07691" BBK_DIFF_A="-0.02591"/>
      <bbk:Obs TIME_PERIOD="2018-12-18" OBS_VALUE="-6.051" BBK_DIFF_A="-0.08538"/>
      <bbk:Obs TIME_PERIOD="2018-12-17" OBS_VALUE="-5.96562" BBK_DIFF_A="0.02146"/>
      <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="-5.98708" BBK_DIFF_A="-0.17206"/>
      <bbk:Obs TIME_PERIOD="2018-12-13" OBS_VALUE="-5.81502" BBK_DIFF_A="-0.21131"/>
      <bbk:Obs TIME_PERIOD="2018-12-12" OBS_VALUE="-5.60371" BBK_DIFF_A="0.14658"/>
      <bbk:Obs TIME_PERIOD="2018-12-11" OBS_VALUE="-5.75029" BBK_DIFF_A="0.00605"/>
      <bbk:Obs TIME_PERIOD="2018-12-10" OBS_VALUE="-5.75634" BBK_DIFF_A="-0.21341"/>
      <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="-5.54293" BBK_DIFF_A="-0.03594"/>
      <bbk:Obs TIME_PERIOD="2018-12-06" OBS_VALUE="-5.50699" BBK_DIFF_A="0.03722"/>
      <bbk:Obs TIME_PERIOD="2018-12-05" OBS_VALUE="-5.54421" BBK_DIFF_A="0.06382"/>
      <bbk:Obs TIME_PERIOD="2018-12-04" OBS_VALUE="-5.60803" BBK_DIFF_A="-0.20237"/>
      <bbk:Obs TIME_PERIOD="2018-12-03" OBS_VALUE="-5.40566" BBK_DIFF_A="-0.0026"/>
      <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="-5.40306" BBK_DIFF_A="0.00463"/>
      <bbk:Obs TIME_PERIOD="2018-11-29" OBS_VALUE="-5.40769" BBK_DIFF_A="0.17646"/>
      <bbk:Obs TIME_PERIOD="2018-11-28" OBS_VALUE="-5.58415" BBK_DIFF_A="-0.01875"/>
      <bbk:Obs TIME_PERIOD="2018-11-27" OBS_VALUE="-5.5654" BBK_DIFF_A="-22.32561"/>
      <bbk:Obs TIME_PERIOD="2018-11-26" OBS_VALUE="16.76021" BBK_DIFF_A="-0.07644"/>
      <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="16.83665" BBK_DIFF_A="0.07846"/>
      <bbk:Obs TIME_PERIOD="2018-11-22" OBS_VALUE="16.75819" BBK_DIFF_A="-0.04371"/>
      <bbk:Obs TIME_PERIOD="2018-11-21" OBS_VALUE="16.8019" BBK_DIFF_A="0.00443"/>
      <bbk:Obs TIME_PERIOD="2018-11-20" OBS_VALUE="16.79747" BBK_DIFF_A="0.00215"/>
      <bbk:Obs TIME_PERIOD="2018-11-19" OBS_VALUE="16.79532" BBK_DIFF_A="-0.03856"/>
      <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="16.83388" BBK_DIFF_A="18.54428"/>
      <bbk:Obs TIME_PERIOD="2018-11-15" OBS_VALUE="-1.7104" BBK_DIFF_A="-0.14532"/>
      <bbk:Obs TIME_PERIOD="2018-11-14" OBS_VALUE="-1.56508" BBK_DIFF_A="0.44262"/>
      <bbk:Obs TIME_PERIOD="2018-11-13" OBS_VALUE="-2.0077" BBK_DIFF_A="1.22557"/>
      <bbk:Obs TIME_PERIOD="2018-11-12" OBS_VALUE="-3.23327" BBK_DIFF_A="0.44263"/>
      <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="-3.6759" BBK_DIFF_A="0.02137"/>
      <bbk:Obs TIME_PERIOD="2018-11-08" OBS_VALUE="-3.69727" BBK_DIFF_A="-0.6493"/>
      <bbk:Obs TIME_PERIOD="2018-11-07" OBS_VALUE="-3.04797" BBK_DIFF_A="0.12561"/>
      <bbk:Obs TIME_PERIOD="2018-11-06" OBS_VALUE="-3.17358" BBK_DIFF_A="-0.04139"/>
      <bbk:Obs TIME_PERIOD="2018-11-05" OBS_VALUE="-3.13219" BBK_DIFF_A="-0.50474"/>
      <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="-2.62745" BBK_DIFF_A="-0.77188"/>
      <bbk:Obs TIME_PERIOD="2018-11-01" OBS_VALUE="-1.85557" BBK_DIFF_A="1.30237"/>
      <bbk:Obs TIME_PERIOD="2018-10-31" OBS_VALUE="-3.15794" BBK_DIFF_A="0.63883"/>
      <bbk:Obs TIME_PERIOD="2018-10-30" OBS_VALUE="-3.79677" BBK_DIFF_A="16.20323"/>
      <bbk:Obs TIME_PERIOD="2018-10-29" OBS_VALUE="-20.0" BBK_DIFF_A="-36.86387"/>
      <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="16.86387" BBK_DIFF_A="-0.07669"/>
      <bbk:Obs TIME_PERIOD="2018-10-25" OBS_VALUE="16.94056" BBK_DIFF_A="-2.60894"/>
      <bbk:Obs TIME_PERIOD="2018-10-24" OBS_VALUE="19.5495" BBK_DIFF_A="0.52808"/>
      <bbk:Obs TIME_PERIOD="2018-10-23" OBS_VALUE="19.02142" BBK_DIFF_A="-0.0103"/>
      <bbk:Obs TIME_PERIOD="2018-10-22" OBS_VALUE="19.03172" BBK_DIFF_A="0.03524"/>
      <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="18.99648" BBK_DIFF_A="-1.00352"/>
      <bbk:Obs TIME_PERIOD="2018-10-18" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2018-10-17" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2018-10-16" OBS_VALUE="20.0" BBK_DIFF_A="0.05379"/>
      <bbk:Obs TIME_PERIOD="2018-10-15" OBS_VALUE="19.94621" BBK_DIFF_A="0.24026"/>
      <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="19.70595" BBK_DIFF_A="-0.25464"/>
      <bbk:Obs TIME_PERIOD="2018-10-11" OBS_VALUE="19.96059" BBK_DIFF_A="21.13998"/>
      <bbk:Obs TIME_PERIOD="2018-10-10" OBS_VALUE="-1.17939" BBK_DIFF_A="0.95615"/>
      <bbk:Obs TIME_PERIOD="2018-10-09" OBS_VALUE="-2.13554" BBK_DIFF_A="-0.04974"/>
      <bbk:Obs TIME_PERIOD="2018-10-08" OBS_VALUE="-2.0858" BBK_DIFF_A="-0.73536"/>
      <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="-1.35044" BBK_DIFF_A="18.64956"/>
      <bbk:Obs TIME_PERIOD="2018-10-04" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2018-10-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-10-02" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2018-10-01" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <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="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2018-09-27" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2018-09-26" OBS_VALUE="-20.0" BBK_DIFF_A="-0.02674"/>
      <bbk:Obs TIME_PERIOD="2018-09-25" OBS_VALUE="-19.97326" BBK_DIFF_A="0.02674"/>
      <bbk:Obs TIME_PERIOD="2018-09-24" OBS_VALUE="-20.0" BBK_DIFF_A="-19.0259"/>
      <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="-0.9741" BBK_DIFF_A="-0.19005"/>
      <bbk:Obs TIME_PERIOD="2018-09-20" OBS_VALUE="-0.78405" BBK_DIFF_A="-0.04721"/>
      <bbk:Obs TIME_PERIOD="2018-09-19" OBS_VALUE="-0.73684" BBK_DIFF_A="-3.44673"/>
      <bbk:Obs TIME_PERIOD="2018-09-18" OBS_VALUE="2.70989" BBK_DIFF_A="8.13845"/>
      <bbk:Obs TIME_PERIOD="2018-09-17" OBS_VALUE="-5.42856" BBK_DIFF_A="0.01969"/>
      <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="-5.44825" BBK_DIFF_A="-0.04267"/>
      <bbk:Obs TIME_PERIOD="2018-09-13" OBS_VALUE="-5.40558" BBK_DIFF_A="0.01488"/>
      <bbk:Obs TIME_PERIOD="2018-09-12" OBS_VALUE="-5.42046" BBK_DIFF_A="14.57954"/>
      <bbk:Obs TIME_PERIOD="2018-09-11" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2018-09-10" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <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="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2018-09-06" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2018-09-05" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2018-09-04" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2018-09-03" OBS_VALUE="-20.0" BBK_DIFF_A="-36.61954"/>
      <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="16.61954" BBK_DIFF_A="0.02643"/>
      <bbk:Obs TIME_PERIOD="2018-08-30" OBS_VALUE="16.59311" BBK_DIFF_A="-0.21897"/>
      <bbk:Obs TIME_PERIOD="2018-08-29" OBS_VALUE="16.81208" BBK_DIFF_A="0.04183"/>
      <bbk:Obs TIME_PERIOD="2018-08-28" OBS_VALUE="16.77025" BBK_DIFF_A="0.00431"/>
      <bbk:Obs TIME_PERIOD="2018-08-27" OBS_VALUE="16.76594" BBK_DIFF_A="15.69902"/>
      <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="1.06692" BBK_DIFF_A="-18.93308"/>
      <bbk:Obs TIME_PERIOD="2018-08-23" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2018-08-22" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2018-08-21" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2018-08-20" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <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="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2018-08-16" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2018-08-15" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2018-08-14" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2018-08-13" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <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="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2018-08-09" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2018-08-08" OBS_VALUE="20.0" BBK_DIFF_A="40.0"/>
      <bbk:Obs TIME_PERIOD="2018-08-07" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2018-08-06" OBS_VALUE="-20.0" BBK_DIFF_A="-0.81665"/>
      <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="-19.18335" BBK_DIFF_A="-4.30128"/>
      <bbk:Obs TIME_PERIOD="2018-08-02" OBS_VALUE="-14.88207" BBK_DIFF_A="-2.16561"/>
      <bbk:Obs TIME_PERIOD="2018-08-01" OBS_VALUE="-12.71646" BBK_DIFF_A="-11.79464"/>
      <bbk:Obs TIME_PERIOD="2018-07-31" OBS_VALUE="-0.92182" BBK_DIFF_A="0.32875"/>
      <bbk:Obs TIME_PERIOD="2018-07-30" OBS_VALUE="-1.25057" BBK_DIFF_A="0.27304"/>
      <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="-1.52361" BBK_DIFF_A="0.8203"/>
      <bbk:Obs TIME_PERIOD="2018-07-26" OBS_VALUE="-2.34391" BBK_DIFF_A="3.03095"/>
      <bbk:Obs TIME_PERIOD="2018-07-25" OBS_VALUE="-5.37486" BBK_DIFF_A="-0.01776"/>
      <bbk:Obs TIME_PERIOD="2018-07-24" OBS_VALUE="-5.3571" BBK_DIFF_A="0.0168"/>
      <bbk:Obs TIME_PERIOD="2018-07-23" OBS_VALUE="-5.3739" BBK_DIFF_A="0.02882"/>
      <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="-5.40272" BBK_DIFF_A="0.09272"/>
      <bbk:Obs TIME_PERIOD="2018-07-19" OBS_VALUE="-5.49544" BBK_DIFF_A="0.06252"/>
      <bbk:Obs TIME_PERIOD="2018-07-18" OBS_VALUE="-5.55796" BBK_DIFF_A="-0.08469"/>
      <bbk:Obs TIME_PERIOD="2018-07-17" OBS_VALUE="-5.47327" BBK_DIFF_A="0.1532"/>
      <bbk:Obs TIME_PERIOD="2018-07-16" OBS_VALUE="-5.62647" BBK_DIFF_A="-0.15682"/>
      <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="-5.46965" BBK_DIFF_A="0.01202"/>
      <bbk:Obs TIME_PERIOD="2018-07-12" OBS_VALUE="-5.48167" BBK_DIFF_A="12.77918"/>
      <bbk:Obs TIME_PERIOD="2018-07-11" OBS_VALUE="-18.26085" BBK_DIFF_A="0.04533"/>
      <bbk:Obs TIME_PERIOD="2018-07-10" OBS_VALUE="-18.30618" BBK_DIFF_A="0.1964"/>
      <bbk:Obs TIME_PERIOD="2018-07-09" OBS_VALUE="-18.50258" BBK_DIFF_A="1.49742"/>
      <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="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2018-07-05" OBS_VALUE="-20.0" BBK_DIFF_A="-13.92049"/>
      <bbk:Obs TIME_PERIOD="2018-07-04" OBS_VALUE="-6.07951" BBK_DIFF_A="0.00624"/>
      <bbk:Obs TIME_PERIOD="2018-07-03" OBS_VALUE="-6.08575" BBK_DIFF_A="-0.9396"/>
      <bbk:Obs TIME_PERIOD="2018-07-02" OBS_VALUE="-5.14615" BBK_DIFF_A="0.7552"/>
      <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="-5.90135" BBK_DIFF_A="-0.99147"/>
      <bbk:Obs TIME_PERIOD="2018-06-28" OBS_VALUE="-4.90988" BBK_DIFF_A="-0.97214"/>
      <bbk:Obs TIME_PERIOD="2018-06-27" OBS_VALUE="-3.93774" BBK_DIFF_A="-0.87515"/>
      <bbk:Obs TIME_PERIOD="2018-06-26" OBS_VALUE="-3.06259" BBK_DIFF_A="-23.06259"/>
      <bbk:Obs TIME_PERIOD="2018-06-25" OBS_VALUE="20.0" BBK_DIFF_A="21.23705"/>
      <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="-1.23705" BBK_DIFF_A="0.14922"/>
      <bbk:Obs TIME_PERIOD="2018-06-21" OBS_VALUE="-1.38627" BBK_DIFF_A="0.03656"/>
      <bbk:Obs TIME_PERIOD="2018-06-20" OBS_VALUE="-1.42283" BBK_DIFF_A="0.15153"/>
      <bbk:Obs TIME_PERIOD="2018-06-19" OBS_VALUE="-1.57436" BBK_DIFF_A="-0.75062"/>
      <bbk:Obs TIME_PERIOD="2018-06-18" OBS_VALUE="-0.82374" BBK_DIFF_A="-3.27265"/>
      <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="2.44891" BBK_DIFF_A="-0.0308"/>
      <bbk:Obs TIME_PERIOD="2018-06-14" OBS_VALUE="2.47971" BBK_DIFF_A="0.13617"/>
      <bbk:Obs TIME_PERIOD="2018-06-13" OBS_VALUE="2.34354" BBK_DIFF_A="0.06454"/>
      <bbk:Obs TIME_PERIOD="2018-06-12" OBS_VALUE="2.279" BBK_DIFF_A="0.40026"/>
      <bbk:Obs TIME_PERIOD="2018-06-11" OBS_VALUE="1.87874" BBK_DIFF_A="0.46633"/>
      <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="1.41241" BBK_DIFF_A="-0.00793"/>
      <bbk:Obs TIME_PERIOD="2018-06-07" OBS_VALUE="1.42034" BBK_DIFF_A="6.45919"/>
      <bbk:Obs TIME_PERIOD="2018-06-06" OBS_VALUE="-5.03885" BBK_DIFF_A="0.05793"/>
      <bbk:Obs TIME_PERIOD="2018-06-05" OBS_VALUE="-5.09678" BBK_DIFF_A="-0.79844"/>
      <bbk:Obs TIME_PERIOD="2018-06-04" OBS_VALUE="-4.29834" BBK_DIFF_A="0.21867"/>
      <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="-4.51701" BBK_DIFF_A="-0.18055"/>
      <bbk:Obs TIME_PERIOD="2018-05-31" OBS_VALUE="-4.33646" BBK_DIFF_A="-3.19425"/>
      <bbk:Obs TIME_PERIOD="2018-05-30" OBS_VALUE="-1.14221" BBK_DIFF_A="-0.14336"/>
      <bbk:Obs TIME_PERIOD="2018-05-29" OBS_VALUE="-0.99885" BBK_DIFF_A="0.10638"/>
      <bbk:Obs TIME_PERIOD="2018-05-28" OBS_VALUE="-1.10523" BBK_DIFF_A="0.41821"/>
      <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="-1.52344" BBK_DIFF_A="15.81475"/>
      <bbk:Obs TIME_PERIOD="2018-05-24" OBS_VALUE="-17.33819" BBK_DIFF_A="0.2409"/>
      <bbk:Obs TIME_PERIOD="2018-05-23" OBS_VALUE="-17.57909" BBK_DIFF_A="0.19769"/>
      <bbk:Obs TIME_PERIOD="2018-05-22" OBS_VALUE="-17.77678" BBK_DIFF_A="0.6883"/>
      <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="-18.46508" BBK_DIFF_A="1.46615"/>
      <bbk:Obs TIME_PERIOD="2018-05-17" OBS_VALUE="-19.93123" BBK_DIFF_A="-0.76174"/>
      <bbk:Obs TIME_PERIOD="2018-05-16" OBS_VALUE="-19.16949" BBK_DIFF_A="-0.39922"/>
      <bbk:Obs TIME_PERIOD="2018-05-15" OBS_VALUE="-18.77027" BBK_DIFF_A="0.23638"/>
      <bbk:Obs TIME_PERIOD="2018-05-14" OBS_VALUE="-19.00665" BBK_DIFF_A="-1.5616"/>
      <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="-17.44505" BBK_DIFF_A="-17.29883"/>
      <bbk:Obs TIME_PERIOD="2018-05-10" OBS_VALUE="-0.14622" BBK_DIFF_A="0.01513"/>
      <bbk:Obs TIME_PERIOD="2018-05-09" OBS_VALUE="-0.16135" BBK_DIFF_A="0.03244"/>
      <bbk:Obs TIME_PERIOD="2018-05-08" OBS_VALUE="-0.19379" BBK_DIFF_A="0.14974"/>
      <bbk:Obs TIME_PERIOD="2018-05-07" OBS_VALUE="-0.34353" BBK_DIFF_A="0.2115"/>
      <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="-0.55503" BBK_DIFF_A="-1.60352"/>
      <bbk:Obs TIME_PERIOD="2018-05-03" OBS_VALUE="1.04849" BBK_DIFF_A="-0.26663"/>
      <bbk:Obs TIME_PERIOD="2018-05-02" OBS_VALUE="1.31512" BBK_DIFF_A="5.40143"/>
      <bbk:Obs TIME_PERIOD="2018-05-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2018-04-30" OBS_VALUE="-4.08631" BBK_DIFF_A="-0.29402"/>
      <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="-3.79229" BBK_DIFF_A="0.44027"/>
      <bbk:Obs TIME_PERIOD="2018-04-26" OBS_VALUE="-4.23256" BBK_DIFF_A="-0.0356"/>
      <bbk:Obs TIME_PERIOD="2018-04-25" OBS_VALUE="-4.19696" BBK_DIFF_A="0.24768"/>
      <bbk:Obs TIME_PERIOD="2018-04-24" OBS_VALUE="-4.44464" BBK_DIFF_A="-0.19295"/>
      <bbk:Obs TIME_PERIOD="2018-04-23" OBS_VALUE="-4.25169" BBK_DIFF_A="0.01095"/>
      <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="-4.26264" BBK_DIFF_A="0.19972"/>
      <bbk:Obs TIME_PERIOD="2018-04-19" OBS_VALUE="-4.46236" BBK_DIFF_A="-0.23157"/>
      <bbk:Obs TIME_PERIOD="2018-04-18" OBS_VALUE="-4.23079" BBK_DIFF_A="0.06592"/>
      <bbk:Obs TIME_PERIOD="2018-04-17" OBS_VALUE="-4.29671" BBK_DIFF_A="0.08397"/>
      <bbk:Obs TIME_PERIOD="2018-04-16" OBS_VALUE="-4.38068" BBK_DIFF_A="-0.04882"/>
      <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="-4.33186" BBK_DIFF_A="-0.09374"/>
      <bbk:Obs TIME_PERIOD="2018-04-12" OBS_VALUE="-4.23812" BBK_DIFF_A="0.0641"/>
      <bbk:Obs TIME_PERIOD="2018-04-11" OBS_VALUE="-4.30222" BBK_DIFF_A="0.17068"/>
      <bbk:Obs TIME_PERIOD="2018-04-10" OBS_VALUE="-4.4729" BBK_DIFF_A="0.02805"/>
      <bbk:Obs TIME_PERIOD="2018-04-09" OBS_VALUE="-4.50095" BBK_DIFF_A="-0.16137"/>
      <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="-4.33958" BBK_DIFF_A="0.01736"/>
      <bbk:Obs TIME_PERIOD="2018-04-05" OBS_VALUE="-4.35694" BBK_DIFF_A="-0.26366"/>
      <bbk:Obs TIME_PERIOD="2018-04-04" OBS_VALUE="-4.09328" BBK_DIFF_A="-0.12429"/>
      <bbk:Obs TIME_PERIOD="2018-04-03" OBS_VALUE="-3.96899" BBK_DIFF_A="-0.0824"/>
      <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="-3.88659" BBK_DIFF_A="0.20187"/>
      <bbk:Obs TIME_PERIOD="2018-03-28" OBS_VALUE="-4.08846" BBK_DIFF_A="-0.41377"/>
      <bbk:Obs TIME_PERIOD="2018-03-27" OBS_VALUE="-3.67469" BBK_DIFF_A="0.17504"/>
      <bbk:Obs TIME_PERIOD="2018-03-26" OBS_VALUE="-3.84973" BBK_DIFF_A="-0.04518"/>
      <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="-3.80455" BBK_DIFF_A="0.16534"/>
      <bbk:Obs TIME_PERIOD="2018-03-22" OBS_VALUE="-3.96989" BBK_DIFF_A="0.21875"/>
      <bbk:Obs TIME_PERIOD="2018-03-21" OBS_VALUE="-4.18864" BBK_DIFF_A="-0.34031"/>
      <bbk:Obs TIME_PERIOD="2018-03-20" OBS_VALUE="-3.84833" BBK_DIFF_A="0.0658"/>
      <bbk:Obs TIME_PERIOD="2018-03-19" OBS_VALUE="-3.91413" BBK_DIFF_A="0.28939"/>
      <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="-4.20352" BBK_DIFF_A="-0.21943"/>
      <bbk:Obs TIME_PERIOD="2018-03-15" OBS_VALUE="-3.98409" BBK_DIFF_A="-0.43684"/>
      <bbk:Obs TIME_PERIOD="2018-03-14" OBS_VALUE="-3.54725" BBK_DIFF_A="-0.21742"/>
      <bbk:Obs TIME_PERIOD="2018-03-13" OBS_VALUE="-3.32983" BBK_DIFF_A="0.10183"/>
      <bbk:Obs TIME_PERIOD="2018-03-12" OBS_VALUE="-3.43166" BBK_DIFF_A="-0.19551"/>
      <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="-3.23615" BBK_DIFF_A="-2.1615"/>
      <bbk:Obs TIME_PERIOD="2018-03-08" OBS_VALUE="-1.07465" BBK_DIFF_A="-0.06871"/>
      <bbk:Obs TIME_PERIOD="2018-03-07" OBS_VALUE="-1.00594" BBK_DIFF_A="-0.0332"/>
      <bbk:Obs TIME_PERIOD="2018-03-06" OBS_VALUE="-0.97274" BBK_DIFF_A="0.70424"/>
      <bbk:Obs TIME_PERIOD="2018-03-05" OBS_VALUE="-1.67698" BBK_DIFF_A="-0.04647"/>
      <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="-1.63051" BBK_DIFF_A="-0.3857"/>
      <bbk:Obs TIME_PERIOD="2018-03-01" OBS_VALUE="-1.24481" BBK_DIFF_A="0.08139"/>
      <bbk:Obs TIME_PERIOD="2018-02-28" OBS_VALUE="-1.3262" BBK_DIFF_A="-0.14283"/>
      <bbk:Obs TIME_PERIOD="2018-02-27" OBS_VALUE="-1.18337" BBK_DIFF_A="0.04134"/>
      <bbk:Obs TIME_PERIOD="2018-02-26" OBS_VALUE="-1.22471" BBK_DIFF_A="-3.65415"/>
      <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="2.42944" BBK_DIFF_A="0.53225"/>
      <bbk:Obs TIME_PERIOD="2018-02-22" OBS_VALUE="1.89719" BBK_DIFF_A="-0.05125"/>
      <bbk:Obs TIME_PERIOD="2018-02-21" OBS_VALUE="1.94844" BBK_DIFF_A="-0.24585"/>
      <bbk:Obs TIME_PERIOD="2018-02-20" OBS_VALUE="2.19429" BBK_DIFF_A="0.56009"/>
      <bbk:Obs TIME_PERIOD="2018-02-19" OBS_VALUE="1.6342" BBK_DIFF_A="-0.19108"/>
      <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="1.82528" BBK_DIFF_A="-0.55857"/>
      <bbk:Obs TIME_PERIOD="2018-02-15" OBS_VALUE="2.38385" BBK_DIFF_A="0.02991"/>
      <bbk:Obs TIME_PERIOD="2018-02-14" OBS_VALUE="2.35394" BBK_DIFF_A="0.15309"/>
      <bbk:Obs TIME_PERIOD="2018-02-13" OBS_VALUE="2.20085" BBK_DIFF_A="0.29437"/>
      <bbk:Obs TIME_PERIOD="2018-02-12" OBS_VALUE="1.90648" BBK_DIFF_A="0.16867"/>
      <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="1.73781" BBK_DIFF_A="-0.50622"/>
      <bbk:Obs TIME_PERIOD="2018-02-08" OBS_VALUE="2.24403" BBK_DIFF_A="0.23443"/>
      <bbk:Obs TIME_PERIOD="2018-02-07" OBS_VALUE="2.0096" BBK_DIFF_A="-0.14696"/>
      <bbk:Obs TIME_PERIOD="2018-02-06" OBS_VALUE="2.15656" BBK_DIFF_A="0.06486"/>
      <bbk:Obs TIME_PERIOD="2018-02-05" OBS_VALUE="2.0917" BBK_DIFF_A="-0.40186"/>
      <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="2.49356" BBK_DIFF_A="0.49036"/>
      <bbk:Obs TIME_PERIOD="2018-02-01" OBS_VALUE="2.0032" BBK_DIFF_A="0.23311"/>
      <bbk:Obs TIME_PERIOD="2018-01-31" OBS_VALUE="1.77009" BBK_DIFF_A="-0.14042"/>
      <bbk:Obs TIME_PERIOD="2018-01-30" OBS_VALUE="1.91051" BBK_DIFF_A="0.38327"/>
      <bbk:Obs TIME_PERIOD="2018-01-29" OBS_VALUE="1.52724" BBK_DIFF_A="-0.17477"/>
      <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="1.70201" BBK_DIFF_A="0.43619"/>
      <bbk:Obs TIME_PERIOD="2018-01-25" OBS_VALUE="1.26582" BBK_DIFF_A="-0.30205"/>
      <bbk:Obs TIME_PERIOD="2018-01-24" OBS_VALUE="1.56787" BBK_DIFF_A="0.03514"/>
      <bbk:Obs TIME_PERIOD="2018-01-23" OBS_VALUE="1.53273" BBK_DIFF_A="0.06458"/>
      <bbk:Obs TIME_PERIOD="2018-01-22" OBS_VALUE="1.46815" BBK_DIFF_A="-0.02756"/>
      <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="1.49571" BBK_DIFF_A="0.37757"/>
      <bbk:Obs TIME_PERIOD="2018-01-18" OBS_VALUE="1.11814" BBK_DIFF_A="-0.22599"/>
      <bbk:Obs TIME_PERIOD="2018-01-17" OBS_VALUE="1.34413" BBK_DIFF_A="0.04609"/>
      <bbk:Obs TIME_PERIOD="2018-01-16" OBS_VALUE="1.29804" BBK_DIFF_A="0.03695"/>
      <bbk:Obs TIME_PERIOD="2018-01-15" OBS_VALUE="1.26109" BBK_DIFF_A="0.32333"/>
      <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="0.93776" BBK_DIFF_A="-0.39516"/>
      <bbk:Obs TIME_PERIOD="2018-01-11" OBS_VALUE="1.33292" BBK_DIFF_A="0.49338"/>
      <bbk:Obs TIME_PERIOD="2018-01-10" OBS_VALUE="0.83954" BBK_DIFF_A="1.02506"/>
      <bbk:Obs TIME_PERIOD="2018-01-09" OBS_VALUE="-0.18552" BBK_DIFF_A="0.1606"/>
      <bbk:Obs TIME_PERIOD="2018-01-08" OBS_VALUE="-0.34612" BBK_DIFF_A="-7.969"/>
      <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="7.62288" BBK_DIFF_A="5.19345"/>
      <bbk:Obs TIME_PERIOD="2018-01-04" OBS_VALUE="2.42943" BBK_DIFF_A="-16.83262"/>
      <bbk:Obs TIME_PERIOD="2018-01-03" OBS_VALUE="19.26205" BBK_DIFF_A="23.97895"/>
      <bbk:Obs TIME_PERIOD="2018-01-02" OBS_VALUE="-4.7169" BBK_DIFF_A="15.2831"/>
      <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="-20.0" BBK_DIFF_A="-35.07492"/>
      <bbk:Obs TIME_PERIOD="2017-12-28" OBS_VALUE="15.07492" BBK_DIFF_A="-1.60826"/>
      <bbk:Obs TIME_PERIOD="2017-12-27" OBS_VALUE="16.68318" BBK_DIFF_A="0.04137"/>
      <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="16.64181" BBK_DIFF_A="0.06961"/>
      <bbk:Obs TIME_PERIOD="2017-12-21" OBS_VALUE="16.5722" BBK_DIFF_A="0.09013"/>
      <bbk:Obs TIME_PERIOD="2017-12-20" OBS_VALUE="16.48207" BBK_DIFF_A="0.11293"/>
      <bbk:Obs TIME_PERIOD="2017-12-19" OBS_VALUE="16.36914" BBK_DIFF_A="14.83288"/>
      <bbk:Obs TIME_PERIOD="2017-12-18" OBS_VALUE="1.53626" BBK_DIFF_A="0.1948"/>
      <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="1.34146" BBK_DIFF_A="-0.25042"/>
      <bbk:Obs TIME_PERIOD="2017-12-14" OBS_VALUE="1.59188" BBK_DIFF_A="0.25827"/>
      <bbk:Obs TIME_PERIOD="2017-12-13" OBS_VALUE="1.33361" BBK_DIFF_A="18.66225"/>
      <bbk:Obs TIME_PERIOD="2017-12-12" OBS_VALUE="-17.32864" BBK_DIFF_A="0.54874"/>
      <bbk:Obs TIME_PERIOD="2017-12-11" OBS_VALUE="-17.87738" BBK_DIFF_A="-0.48066"/>
      <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="-17.39672" BBK_DIFF_A="2.60328"/>
      <bbk:Obs TIME_PERIOD="2017-12-07" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2017-12-06" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2017-12-05" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2017-12-04" OBS_VALUE="-20.0" BBK_DIFF_A="-40.0"/>
      <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="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2017-11-30" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2017-11-29" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2017-11-28" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2017-11-27" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <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="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2017-11-23" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2017-11-22" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2017-11-21" OBS_VALUE="20.0" BBK_DIFF_A="22.36462"/>
      <bbk:Obs TIME_PERIOD="2017-11-20" OBS_VALUE="-2.36462" BBK_DIFF_A="-0.40881"/>
      <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="-1.95581" BBK_DIFF_A="-1.01618"/>
      <bbk:Obs TIME_PERIOD="2017-11-16" OBS_VALUE="-0.93963" BBK_DIFF_A="0.92547"/>
      <bbk:Obs TIME_PERIOD="2017-11-15" OBS_VALUE="-1.8651" BBK_DIFF_A="4.33979"/>
      <bbk:Obs TIME_PERIOD="2017-11-14" OBS_VALUE="-6.20489" BBK_DIFF_A="-0.284"/>
      <bbk:Obs TIME_PERIOD="2017-11-13" OBS_VALUE="-5.92089" BBK_DIFF_A="0.18775"/>
      <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="-6.10864" BBK_DIFF_A="-26.10864"/>
      <bbk:Obs TIME_PERIOD="2017-11-09" OBS_VALUE="20.0" BBK_DIFF_A="13.17473"/>
      <bbk:Obs TIME_PERIOD="2017-11-08" OBS_VALUE="6.82527" BBK_DIFF_A="8.08325"/>
      <bbk:Obs TIME_PERIOD="2017-11-07" OBS_VALUE="-1.25798" BBK_DIFF_A="0.95721"/>
      <bbk:Obs TIME_PERIOD="2017-11-06" OBS_VALUE="-2.21519" BBK_DIFF_A="-9.09281"/>
      <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="6.87762" BBK_DIFF_A="-0.15045"/>
      <bbk:Obs TIME_PERIOD="2017-11-02" OBS_VALUE="7.02807" BBK_DIFF_A="-8.80968"/>
      <bbk:Obs TIME_PERIOD="2017-11-01" OBS_VALUE="15.83775" BBK_DIFF_A="0.05357"/>
      <bbk:Obs TIME_PERIOD="2017-10-31" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-10-30" OBS_VALUE="15.78418" BBK_DIFF_A="-0.11473"/>
      <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="15.89891" BBK_DIFF_A="11.44483"/>
      <bbk:Obs TIME_PERIOD="2017-10-26" OBS_VALUE="4.45408" BBK_DIFF_A="0.88837"/>
      <bbk:Obs TIME_PERIOD="2017-10-25" OBS_VALUE="3.56571" BBK_DIFF_A="-1.77448"/>
      <bbk:Obs TIME_PERIOD="2017-10-24" OBS_VALUE="5.34019" BBK_DIFF_A="-0.65026"/>
      <bbk:Obs TIME_PERIOD="2017-10-23" OBS_VALUE="5.99045" BBK_DIFF_A="0.46057"/>
      <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="5.52988" BBK_DIFF_A="1.76094"/>
      <bbk:Obs TIME_PERIOD="2017-10-19" OBS_VALUE="3.76894" BBK_DIFF_A="-1.16694"/>
      <bbk:Obs TIME_PERIOD="2017-10-18" OBS_VALUE="4.93588" BBK_DIFF_A="0.16964"/>
      <bbk:Obs TIME_PERIOD="2017-10-17" OBS_VALUE="4.76624" BBK_DIFF_A="0.07962"/>
      <bbk:Obs TIME_PERIOD="2017-10-16" OBS_VALUE="4.68662" BBK_DIFF_A="0.28015"/>
      <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="4.40647" BBK_DIFF_A="0.09117"/>
      <bbk:Obs TIME_PERIOD="2017-10-12" OBS_VALUE="4.3153" BBK_DIFF_A="-15.6847"/>
      <bbk:Obs TIME_PERIOD="2017-10-11" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2017-10-10" OBS_VALUE="20.0" BBK_DIFF_A="18.08821"/>
      <bbk:Obs TIME_PERIOD="2017-10-09" OBS_VALUE="1.91179" BBK_DIFF_A="-18.08821"/>
      <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="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2017-10-05" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2017-10-04" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2017-10-03" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2017-10-02" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <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="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2017-09-28" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2017-09-27" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2017-09-26" OBS_VALUE="20.0" BBK_DIFF_A="40.0"/>
      <bbk:Obs TIME_PERIOD="2017-09-25" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <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="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2017-09-21" OBS_VALUE="-20.0" BBK_DIFF_A="-40.0"/>
      <bbk:Obs TIME_PERIOD="2017-09-20" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2017-09-19" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2017-09-18" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <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="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2017-09-14" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2017-09-13" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2017-09-12" OBS_VALUE="20.0" BBK_DIFF_A="26.28404"/>
      <bbk:Obs TIME_PERIOD="2017-09-11" OBS_VALUE="-6.28404" BBK_DIFF_A="0.2391"/>
      <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="-6.52314" BBK_DIFF_A="-3.61489"/>
      <bbk:Obs TIME_PERIOD="2017-09-07" OBS_VALUE="-2.90825" BBK_DIFF_A="-6.59312"/>
      <bbk:Obs TIME_PERIOD="2017-09-06" OBS_VALUE="3.68487" BBK_DIFF_A="-0.1453"/>
      <bbk:Obs TIME_PERIOD="2017-09-05" OBS_VALUE="3.83017" BBK_DIFF_A="0.17724"/>
      <bbk:Obs TIME_PERIOD="2017-09-04" OBS_VALUE="3.65293" BBK_DIFF_A="0.31668"/>
      <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="3.33625" BBK_DIFF_A="0.48131"/>
      <bbk:Obs TIME_PERIOD="2017-08-31" OBS_VALUE="2.85494" BBK_DIFF_A="-1.14692"/>
      <bbk:Obs TIME_PERIOD="2017-08-30" OBS_VALUE="4.00186" BBK_DIFF_A="10.63041"/>
      <bbk:Obs TIME_PERIOD="2017-08-29" OBS_VALUE="-6.62855" BBK_DIFF_A="-0.32844"/>
      <bbk:Obs TIME_PERIOD="2017-08-28" OBS_VALUE="-6.30011" BBK_DIFF_A="-26.30011"/>
      <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="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2017-08-24" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2017-08-23" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2017-08-22" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2017-08-21" OBS_VALUE="20.0" 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="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2017-08-17" OBS_VALUE="20.0" BBK_DIFF_A="23.25141"/>
      <bbk:Obs TIME_PERIOD="2017-08-16" OBS_VALUE="-3.25141" BBK_DIFF_A="0.38373"/>
      <bbk:Obs TIME_PERIOD="2017-08-15" OBS_VALUE="-3.63514" BBK_DIFF_A="-23.63514"/>
      <bbk:Obs TIME_PERIOD="2017-08-14" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <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="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2017-08-10" OBS_VALUE="20.0" BBK_DIFF_A="7.72171"/>
      <bbk:Obs TIME_PERIOD="2017-08-09" OBS_VALUE="12.27829" BBK_DIFF_A="-7.72171"/>
      <bbk:Obs TIME_PERIOD="2017-08-08" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2017-08-07" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <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="20.0" BBK_DIFF_A="0.70919"/>
      <bbk:Obs TIME_PERIOD="2017-08-03" OBS_VALUE="19.29081" BBK_DIFF_A="10.95565"/>
      <bbk:Obs TIME_PERIOD="2017-08-02" OBS_VALUE="8.33516" BBK_DIFF_A="-11.66484"/>
      <bbk:Obs TIME_PERIOD="2017-08-01" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2017-07-31" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <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="20.0" BBK_DIFF_A="0.61826"/>
      <bbk:Obs TIME_PERIOD="2017-07-27" OBS_VALUE="19.38174" BBK_DIFF_A="12.22953"/>
      <bbk:Obs TIME_PERIOD="2017-07-26" OBS_VALUE="7.15221" BBK_DIFF_A="-12.84779"/>
      <bbk:Obs TIME_PERIOD="2017-07-25" OBS_VALUE="20.0" BBK_DIFF_A="2.73408"/>
      <bbk:Obs TIME_PERIOD="2017-07-24" OBS_VALUE="17.26592" BBK_DIFF_A="-2.73408"/>
      <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="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2017-07-20" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2017-07-19" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2017-07-18" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2017-07-17" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <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="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2017-07-13" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2017-07-12" OBS_VALUE="20.0" BBK_DIFF_A="1.26621"/>
      <bbk:Obs TIME_PERIOD="2017-07-11" OBS_VALUE="18.73379" BBK_DIFF_A="21.13856"/>
      <bbk:Obs TIME_PERIOD="2017-07-10" OBS_VALUE="-2.40477" BBK_DIFF_A="-17.56693"/>
      <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="15.16216" BBK_DIFF_A="32.70548"/>
      <bbk:Obs TIME_PERIOD="2017-07-06" OBS_VALUE="-17.54332" BBK_DIFF_A="-0.34352"/>
      <bbk:Obs TIME_PERIOD="2017-07-05" OBS_VALUE="-17.1998" BBK_DIFF_A="-0.26903"/>
      <bbk:Obs TIME_PERIOD="2017-07-04" OBS_VALUE="-16.93077" BBK_DIFF_A="-0.43007"/>
      <bbk:Obs TIME_PERIOD="2017-07-03" OBS_VALUE="-16.5007" BBK_DIFF_A="0.64306"/>
      <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="-17.14376" BBK_DIFF_A="1.0847"/>
      <bbk:Obs TIME_PERIOD="2017-06-29" OBS_VALUE="-18.22846" BBK_DIFF_A="-0.13423"/>
      <bbk:Obs TIME_PERIOD="2017-06-28" OBS_VALUE="-18.09423" BBK_DIFF_A="-1.70336"/>
      <bbk:Obs TIME_PERIOD="2017-06-27" OBS_VALUE="-16.39087" BBK_DIFF_A="0.0238"/>
      <bbk:Obs TIME_PERIOD="2017-06-26" OBS_VALUE="-16.41467" BBK_DIFF_A="-0.1512"/>
      <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="-16.26347" BBK_DIFF_A="-0.07084"/>
      <bbk:Obs TIME_PERIOD="2017-06-22" OBS_VALUE="-16.19263" BBK_DIFF_A="-0.02741"/>
      <bbk:Obs TIME_PERIOD="2017-06-21" OBS_VALUE="-16.16522" BBK_DIFF_A="-0.0185"/>
      <bbk:Obs TIME_PERIOD="2017-06-20" OBS_VALUE="-16.14672" BBK_DIFF_A="-0.0095"/>
      <bbk:Obs TIME_PERIOD="2017-06-19" OBS_VALUE="-16.13722" BBK_DIFF_A="3.27658"/>
      <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="-19.4138" BBK_DIFF_A="-13.27412"/>
      <bbk:Obs TIME_PERIOD="2017-06-15" OBS_VALUE="-6.13968" BBK_DIFF_A="0.04519"/>
      <bbk:Obs TIME_PERIOD="2017-06-14" OBS_VALUE="-6.18487" BBK_DIFF_A="0.13283"/>
      <bbk:Obs TIME_PERIOD="2017-06-13" OBS_VALUE="-6.3177" BBK_DIFF_A="-0.06197"/>
      <bbk:Obs TIME_PERIOD="2017-06-12" OBS_VALUE="-6.25573" BBK_DIFF_A="-0.11046"/>
      <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="-6.14527" BBK_DIFF_A="-0.03442"/>
      <bbk:Obs TIME_PERIOD="2017-06-08" OBS_VALUE="-6.11085" BBK_DIFF_A="0.01049"/>
      <bbk:Obs TIME_PERIOD="2017-06-07" OBS_VALUE="-6.12134" BBK_DIFF_A="9.39128"/>
      <bbk:Obs TIME_PERIOD="2017-06-06" OBS_VALUE="-15.51262" BBK_DIFF_A="0.25922"/>
      <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="-15.77184" BBK_DIFF_A="-0.01478"/>
      <bbk:Obs TIME_PERIOD="2017-06-01" OBS_VALUE="-15.75706" BBK_DIFF_A="0.10992"/>
      <bbk:Obs TIME_PERIOD="2017-05-31" OBS_VALUE="-15.86698" BBK_DIFF_A="-0.24343"/>
      <bbk:Obs TIME_PERIOD="2017-05-30" OBS_VALUE="-15.62355" BBK_DIFF_A="0.15402"/>
      <bbk:Obs TIME_PERIOD="2017-05-29" OBS_VALUE="-15.77757" BBK_DIFF_A="-0.08446"/>
      <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="-15.69311" BBK_DIFF_A="-0.23568"/>
      <bbk:Obs TIME_PERIOD="2017-05-25" OBS_VALUE="-15.45743" BBK_DIFF_A="0.23192"/>
      <bbk:Obs TIME_PERIOD="2017-05-24" OBS_VALUE="-15.68935" BBK_DIFF_A="-0.14405"/>
      <bbk:Obs TIME_PERIOD="2017-05-23" OBS_VALUE="-15.5453" BBK_DIFF_A="0.15355"/>
      <bbk:Obs TIME_PERIOD="2017-05-22" OBS_VALUE="-15.69885" BBK_DIFF_A="0.09099"/>
      <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="-15.78984" BBK_DIFF_A="-0.03529"/>
      <bbk:Obs TIME_PERIOD="2017-05-18" OBS_VALUE="-15.75455" BBK_DIFF_A="0.2036"/>
      <bbk:Obs TIME_PERIOD="2017-05-17" OBS_VALUE="-15.95815" BBK_DIFF_A="0.1091"/>
      <bbk:Obs TIME_PERIOD="2017-05-16" OBS_VALUE="-16.06725" BBK_DIFF_A="-0.07404"/>
      <bbk:Obs TIME_PERIOD="2017-05-15" OBS_VALUE="-15.99321" BBK_DIFF_A="0.02239"/>
      <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="-16.0156" BBK_DIFF_A="-0.06348"/>
      <bbk:Obs TIME_PERIOD="2017-05-11" OBS_VALUE="-15.95212" BBK_DIFF_A="-32.18439"/>
      <bbk:Obs TIME_PERIOD="2017-05-10" OBS_VALUE="16.23227" BBK_DIFF_A="-0.13817"/>
      <bbk:Obs TIME_PERIOD="2017-05-09" OBS_VALUE="16.37044" BBK_DIFF_A="22.43609"/>
      <bbk:Obs TIME_PERIOD="2017-05-08" OBS_VALUE="-6.06565" BBK_DIFF_A="-0.07123"/>
      <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="-5.99442" BBK_DIFF_A="0.12025"/>
      <bbk:Obs TIME_PERIOD="2017-05-04" OBS_VALUE="-6.11467" BBK_DIFF_A="-0.01205"/>
      <bbk:Obs TIME_PERIOD="2017-05-03" OBS_VALUE="-6.10262" BBK_DIFF_A="-0.08303"/>
      <bbk:Obs TIME_PERIOD="2017-05-02" OBS_VALUE="-6.01959" BBK_DIFF_A="-0.03469"/>
      <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="-5.9849" BBK_DIFF_A="-0.11832"/>
      <bbk:Obs TIME_PERIOD="2017-04-27" OBS_VALUE="-5.86658" BBK_DIFF_A="-0.00243"/>
      <bbk:Obs TIME_PERIOD="2017-04-26" OBS_VALUE="-5.86415" BBK_DIFF_A="0.19771"/>
      <bbk:Obs TIME_PERIOD="2017-04-25" OBS_VALUE="-6.06186" BBK_DIFF_A="0.03683"/>
      <bbk:Obs TIME_PERIOD="2017-04-24" OBS_VALUE="-6.09869" BBK_DIFF_A="0.09767"/>
      <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="-6.19636" BBK_DIFF_A="-12.66385"/>
      <bbk:Obs TIME_PERIOD="2017-04-20" OBS_VALUE="6.46749" BBK_DIFF_A="0.99065"/>
      <bbk:Obs TIME_PERIOD="2017-04-19" OBS_VALUE="5.47684" BBK_DIFF_A="-0.07959"/>
      <bbk:Obs TIME_PERIOD="2017-04-18" OBS_VALUE="5.55643" BBK_DIFF_A="1.71315"/>
      <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="3.84328" BBK_DIFF_A="-0.36514"/>
      <bbk:Obs TIME_PERIOD="2017-04-12" OBS_VALUE="4.20842" BBK_DIFF_A="1.79526"/>
      <bbk:Obs TIME_PERIOD="2017-04-11" OBS_VALUE="2.41316" BBK_DIFF_A="0.11597"/>
      <bbk:Obs TIME_PERIOD="2017-04-10" OBS_VALUE="2.29719" BBK_DIFF_A="-13.84222"/>
      <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="16.13941" BBK_DIFF_A="-0.05889"/>
      <bbk:Obs TIME_PERIOD="2017-04-06" OBS_VALUE="16.1983" BBK_DIFF_A="0.05843"/>
      <bbk:Obs TIME_PERIOD="2017-04-05" OBS_VALUE="16.13987" BBK_DIFF_A="-0.03041"/>
      <bbk:Obs TIME_PERIOD="2017-04-04" OBS_VALUE="16.17028" BBK_DIFF_A="-0.07141"/>
      <bbk:Obs TIME_PERIOD="2017-04-03" OBS_VALUE="16.24169" BBK_DIFF_A="-0.09983"/>
      <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="16.34152" BBK_DIFF_A="15.29341"/>
      <bbk:Obs TIME_PERIOD="2017-03-30" OBS_VALUE="1.04811" BBK_DIFF_A="0.0868"/>
      <bbk:Obs TIME_PERIOD="2017-03-29" OBS_VALUE="0.96131" BBK_DIFF_A="0.17996"/>
      <bbk:Obs TIME_PERIOD="2017-03-28" OBS_VALUE="0.78135" BBK_DIFF_A="-0.02726"/>
      <bbk:Obs TIME_PERIOD="2017-03-27" OBS_VALUE="0.80861" BBK_DIFF_A="-0.02725"/>
      <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="0.83586" BBK_DIFF_A="0.01009"/>
      <bbk:Obs TIME_PERIOD="2017-03-23" OBS_VALUE="0.82577" BBK_DIFF_A="-0.1445"/>
      <bbk:Obs TIME_PERIOD="2017-03-22" OBS_VALUE="0.97027" BBK_DIFF_A="0.41792"/>
      <bbk:Obs TIME_PERIOD="2017-03-21" OBS_VALUE="0.55235" BBK_DIFF_A="3.13837"/>
      <bbk:Obs TIME_PERIOD="2017-03-20" OBS_VALUE="-2.58602" BBK_DIFF_A="-0.19462"/>
      <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="-2.3914" BBK_DIFF_A="1.37577"/>
      <bbk:Obs TIME_PERIOD="2017-03-16" OBS_VALUE="-3.76717" BBK_DIFF_A="-2.10541"/>
      <bbk:Obs TIME_PERIOD="2017-03-15" OBS_VALUE="-1.66176" BBK_DIFF_A="-0.42514"/>
      <bbk:Obs TIME_PERIOD="2017-03-14" OBS_VALUE="-1.23662" BBK_DIFF_A="0.2442"/>
      <bbk:Obs TIME_PERIOD="2017-03-13" OBS_VALUE="-1.48082" BBK_DIFF_A="0.87851"/>
      <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="-2.35933" BBK_DIFF_A="0.05896"/>
      <bbk:Obs TIME_PERIOD="2017-03-09" OBS_VALUE="-2.41829" BBK_DIFF_A="-0.00586"/>
      <bbk:Obs TIME_PERIOD="2017-03-08" OBS_VALUE="-2.41243" BBK_DIFF_A="0.44552"/>
      <bbk:Obs TIME_PERIOD="2017-03-07" OBS_VALUE="-2.85795" BBK_DIFF_A="0.11665"/>
      <bbk:Obs TIME_PERIOD="2017-03-06" OBS_VALUE="-2.9746" BBK_DIFF_A="-0.21096"/>
      <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="-2.76364" BBK_DIFF_A="0.24398"/>
      <bbk:Obs TIME_PERIOD="2017-03-02" OBS_VALUE="-3.00762" BBK_DIFF_A="-0.87292"/>
      <bbk:Obs TIME_PERIOD="2017-03-01" OBS_VALUE="-2.1347" BBK_DIFF_A="0.11117"/>
      <bbk:Obs TIME_PERIOD="2017-02-28" OBS_VALUE="-2.24587" BBK_DIFF_A="-0.33605"/>
      <bbk:Obs TIME_PERIOD="2017-02-27" OBS_VALUE="-1.90982" BBK_DIFF_A="0.20755"/>
      <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="-2.11737" BBK_DIFF_A="-0.88214"/>
      <bbk:Obs TIME_PERIOD="2017-02-23" OBS_VALUE="-1.23523" BBK_DIFF_A="0.79098"/>
      <bbk:Obs TIME_PERIOD="2017-02-22" OBS_VALUE="-2.02621" BBK_DIFF_A="-0.39257"/>
      <bbk:Obs TIME_PERIOD="2017-02-21" OBS_VALUE="-1.63364" BBK_DIFF_A="0.65854"/>
      <bbk:Obs TIME_PERIOD="2017-02-20" OBS_VALUE="-2.29218" BBK_DIFF_A="0.33186"/>
      <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="-2.62404" BBK_DIFF_A="-0.24426"/>
      <bbk:Obs TIME_PERIOD="2017-02-16" OBS_VALUE="-2.37978" BBK_DIFF_A="0.47558"/>
      <bbk:Obs TIME_PERIOD="2017-02-15" OBS_VALUE="-2.85536" BBK_DIFF_A="0.43127"/>
      <bbk:Obs TIME_PERIOD="2017-02-14" OBS_VALUE="-3.28663" BBK_DIFF_A="0.38196"/>
      <bbk:Obs TIME_PERIOD="2017-02-13" OBS_VALUE="-3.66859" BBK_DIFF_A="0.29108"/>
      <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="-3.95967" BBK_DIFF_A="-0.27412"/>
      <bbk:Obs TIME_PERIOD="2017-02-09" OBS_VALUE="-3.68555" BBK_DIFF_A="-0.56385"/>
      <bbk:Obs TIME_PERIOD="2017-02-08" OBS_VALUE="-3.1217" BBK_DIFF_A="-0.06876"/>
      <bbk:Obs TIME_PERIOD="2017-02-07" OBS_VALUE="-3.05294" BBK_DIFF_A="-1.12609"/>
      <bbk:Obs TIME_PERIOD="2017-02-06" OBS_VALUE="-1.92685" BBK_DIFF_A="0.62475"/>
      <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="-2.5516" BBK_DIFF_A="-1.04975"/>
      <bbk:Obs TIME_PERIOD="2017-02-02" OBS_VALUE="-1.50185" BBK_DIFF_A="0.6963"/>
      <bbk:Obs TIME_PERIOD="2017-02-01" OBS_VALUE="-2.19815" BBK_DIFF_A="-0.01997"/>
      <bbk:Obs TIME_PERIOD="2017-01-31" OBS_VALUE="-2.17818" BBK_DIFF_A="-0.3521"/>
      <bbk:Obs TIME_PERIOD="2017-01-30" OBS_VALUE="-1.82608" BBK_DIFF_A="0.29608"/>
      <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="-2.12216" BBK_DIFF_A="0.46649"/>
      <bbk:Obs TIME_PERIOD="2017-01-26" OBS_VALUE="-2.58865" BBK_DIFF_A="0.01486"/>
      <bbk:Obs TIME_PERIOD="2017-01-25" OBS_VALUE="-2.60351" BBK_DIFF_A="17.39649"/>
      <bbk:Obs TIME_PERIOD="2017-01-24" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2017-01-23" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <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="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2017-01-19" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2017-01-18" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2017-01-17" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2017-01-16" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <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="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2017-01-12" OBS_VALUE="-20.0" BBK_DIFF_A="-14.21792"/>
      <bbk:Obs TIME_PERIOD="2017-01-11" OBS_VALUE="-5.78208" BBK_DIFF_A="0.10012"/>
      <bbk:Obs TIME_PERIOD="2017-01-10" OBS_VALUE="-5.8822" BBK_DIFF_A="-0.09622"/>
      <bbk:Obs TIME_PERIOD="2017-01-09" OBS_VALUE="-5.78598" BBK_DIFF_A="0.09904"/>
      <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="-5.88502" BBK_DIFF_A="0.32699"/>
      <bbk:Obs TIME_PERIOD="2017-01-05" OBS_VALUE="-6.21201" BBK_DIFF_A="0.09657"/>
      <bbk:Obs TIME_PERIOD="2017-01-04" OBS_VALUE="-6.30858" BBK_DIFF_A="0.11336"/>
      <bbk:Obs TIME_PERIOD="2017-01-03" OBS_VALUE="-6.42194" BBK_DIFF_A="-0.05512"/>
      <bbk:Obs TIME_PERIOD="2017-01-02" OBS_VALUE="-6.36682" BBK_DIFF_A="-0.02242"/>
      <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="-6.3444" BBK_DIFF_A="0.11792"/>
      <bbk:Obs TIME_PERIOD="2016-12-29" OBS_VALUE="-6.46232" BBK_DIFF_A="-0.05111"/>
      <bbk:Obs TIME_PERIOD="2016-12-28" OBS_VALUE="-6.41121" BBK_DIFF_A="-0.10949"/>
      <bbk:Obs TIME_PERIOD="2016-12-27" OBS_VALUE="-6.30172" BBK_DIFF_A="0.0474"/>
      <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="-6.34912" BBK_DIFF_A="-0.0478"/>
      <bbk:Obs TIME_PERIOD="2016-12-22" OBS_VALUE="-6.30132" BBK_DIFF_A="-0.1226"/>
      <bbk:Obs TIME_PERIOD="2016-12-21" OBS_VALUE="-6.17872" BBK_DIFF_A="0.02004"/>
      <bbk:Obs TIME_PERIOD="2016-12-20" OBS_VALUE="-6.19876" BBK_DIFF_A="0.06092"/>
      <bbk:Obs TIME_PERIOD="2016-12-19" OBS_VALUE="-6.25968" BBK_DIFF_A="-8.3986"/>
      <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="2.13892" BBK_DIFF_A="-14.07815"/>
      <bbk:Obs TIME_PERIOD="2016-12-15" OBS_VALUE="16.21707" BBK_DIFF_A="19.38161"/>
      <bbk:Obs TIME_PERIOD="2016-12-14" OBS_VALUE="-3.16454" BBK_DIFF_A="0.69485"/>
      <bbk:Obs TIME_PERIOD="2016-12-13" OBS_VALUE="-3.85939" BBK_DIFF_A="-0.15884"/>
      <bbk:Obs TIME_PERIOD="2016-12-12" OBS_VALUE="-3.70055" BBK_DIFF_A="0.0215"/>
      <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="-3.72205" BBK_DIFF_A="-0.68984"/>
      <bbk:Obs TIME_PERIOD="2016-12-08" OBS_VALUE="-3.03221" BBK_DIFF_A="0.26759"/>
      <bbk:Obs TIME_PERIOD="2016-12-07" OBS_VALUE="-3.2998" BBK_DIFF_A="-0.24717"/>
      <bbk:Obs TIME_PERIOD="2016-12-06" OBS_VALUE="-3.05263" BBK_DIFF_A="-0.06231"/>
      <bbk:Obs TIME_PERIOD="2016-12-05" OBS_VALUE="-2.99032" BBK_DIFF_A="-0.27095"/>
      <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="-2.71937" BBK_DIFF_A="-0.08505"/>
      <bbk:Obs TIME_PERIOD="2016-12-01" OBS_VALUE="-2.63432" BBK_DIFF_A="0.42413"/>
      <bbk:Obs TIME_PERIOD="2016-11-30" OBS_VALUE="-3.05845" BBK_DIFF_A="0.47705"/>
      <bbk:Obs TIME_PERIOD="2016-11-29" OBS_VALUE="-3.5355" BBK_DIFF_A="-1.43475"/>
      <bbk:Obs TIME_PERIOD="2016-11-28" OBS_VALUE="-2.10075" BBK_DIFF_A="17.89925"/>
      <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="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2016-11-24" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2016-11-23" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2016-11-22" OBS_VALUE="-20.0" BBK_DIFF_A="-14.42353"/>
      <bbk:Obs TIME_PERIOD="2016-11-21" OBS_VALUE="-5.57647" BBK_DIFF_A="-0.09049"/>
      <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="-5.48598" BBK_DIFF_A="0.11638"/>
      <bbk:Obs TIME_PERIOD="2016-11-17" OBS_VALUE="-5.60236" BBK_DIFF_A="0.00328"/>
      <bbk:Obs TIME_PERIOD="2016-11-16" OBS_VALUE="-5.60564" BBK_DIFF_A="-0.02748"/>
      <bbk:Obs TIME_PERIOD="2016-11-15" OBS_VALUE="-5.57816" BBK_DIFF_A="-0.04328"/>
      <bbk:Obs TIME_PERIOD="2016-11-14" OBS_VALUE="-5.53488" BBK_DIFF_A="0.09384"/>
      <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="-5.62872" BBK_DIFF_A="0.09533"/>
      <bbk:Obs TIME_PERIOD="2016-11-10" OBS_VALUE="-5.72405" BBK_DIFF_A="0.02926"/>
      <bbk:Obs TIME_PERIOD="2016-11-09" OBS_VALUE="-5.75331" BBK_DIFF_A="0.02586"/>
      <bbk:Obs TIME_PERIOD="2016-11-08" OBS_VALUE="-5.77917" BBK_DIFF_A="-0.13118"/>
      <bbk:Obs TIME_PERIOD="2016-11-07" OBS_VALUE="-5.64799" BBK_DIFF_A="0.06219"/>
      <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="-5.71018" BBK_DIFF_A="0.06333"/>
      <bbk:Obs TIME_PERIOD="2016-11-03" OBS_VALUE="-5.77351" BBK_DIFF_A="-0.0688"/>
      <bbk:Obs TIME_PERIOD="2016-11-02" OBS_VALUE="-5.70471" BBK_DIFF_A="-0.05457"/>
      <bbk:Obs TIME_PERIOD="2016-11-01" OBS_VALUE="-5.65014" BBK_DIFF_A="-0.67528"/>
      <bbk:Obs TIME_PERIOD="2016-10-31" OBS_VALUE="-4.97486" BBK_DIFF_A="0.308"/>
      <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="-5.28286" BBK_DIFF_A="0.02432"/>
      <bbk:Obs TIME_PERIOD="2016-10-27" OBS_VALUE="-5.30718" BBK_DIFF_A="-6.93097"/>
      <bbk:Obs TIME_PERIOD="2016-10-26" OBS_VALUE="1.62379" BBK_DIFF_A="0.29411"/>
      <bbk:Obs TIME_PERIOD="2016-10-25" OBS_VALUE="1.32968" BBK_DIFF_A="-0.02661"/>
      <bbk:Obs TIME_PERIOD="2016-10-24" OBS_VALUE="1.35629" BBK_DIFF_A="0.2763"/>
      <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="1.07999" BBK_DIFF_A="5.94615"/>
      <bbk:Obs TIME_PERIOD="2016-10-20" OBS_VALUE="-4.86616" BBK_DIFF_A="0.43444"/>
      <bbk:Obs TIME_PERIOD="2016-10-19" OBS_VALUE="-5.3006" BBK_DIFF_A="-0.23283"/>
      <bbk:Obs TIME_PERIOD="2016-10-18" OBS_VALUE="-5.06777" BBK_DIFF_A="0.15124"/>
      <bbk:Obs TIME_PERIOD="2016-10-17" OBS_VALUE="-5.21901" BBK_DIFF_A="0.04983"/>
      <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="-5.26884" BBK_DIFF_A="-0.04562"/>
      <bbk:Obs TIME_PERIOD="2016-10-13" OBS_VALUE="-5.22322" BBK_DIFF_A="-7.75744"/>
      <bbk:Obs TIME_PERIOD="2016-10-12" OBS_VALUE="2.53422" BBK_DIFF_A="-0.56489"/>
      <bbk:Obs TIME_PERIOD="2016-10-11" OBS_VALUE="3.09911" BBK_DIFF_A="0.7438"/>
      <bbk:Obs TIME_PERIOD="2016-10-10" OBS_VALUE="2.35531" BBK_DIFF_A="0.09724"/>
      <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="2.25807" BBK_DIFF_A="-0.70303"/>
      <bbk:Obs TIME_PERIOD="2016-10-06" OBS_VALUE="2.9611" BBK_DIFF_A="0.4636"/>
      <bbk:Obs TIME_PERIOD="2016-10-05" OBS_VALUE="2.4975" BBK_DIFF_A="0.51562"/>
      <bbk:Obs TIME_PERIOD="2016-10-04" OBS_VALUE="1.98188" BBK_DIFF_A="10.08385"/>
      <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="-8.10197" BBK_DIFF_A="-0.27259"/>
      <bbk:Obs TIME_PERIOD="2016-09-29" OBS_VALUE="-7.82938" BBK_DIFF_A="-3.09574"/>
      <bbk:Obs TIME_PERIOD="2016-09-28" OBS_VALUE="-4.73364" BBK_DIFF_A="0.09434"/>
      <bbk:Obs TIME_PERIOD="2016-09-27" OBS_VALUE="-4.82798" BBK_DIFF_A="0.08229"/>
      <bbk:Obs TIME_PERIOD="2016-09-26" OBS_VALUE="-4.91027" BBK_DIFF_A="-0.03233"/>
      <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="-4.87794" BBK_DIFF_A="0.81558"/>
      <bbk:Obs TIME_PERIOD="2016-09-22" OBS_VALUE="-5.69352" BBK_DIFF_A="-0.14989"/>
      <bbk:Obs TIME_PERIOD="2016-09-21" OBS_VALUE="-5.54363" BBK_DIFF_A="-25.54363"/>
      <bbk:Obs TIME_PERIOD="2016-09-20" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2016-09-19" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <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="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2016-09-15" OBS_VALUE="20.0" BBK_DIFF_A="1.30725"/>
      <bbk:Obs TIME_PERIOD="2016-09-14" OBS_VALUE="18.69275" BBK_DIFF_A="26.60785"/>
      <bbk:Obs TIME_PERIOD="2016-09-13" OBS_VALUE="-7.9151" BBK_DIFF_A="0.17335"/>
      <bbk:Obs TIME_PERIOD="2016-09-12" OBS_VALUE="-8.08845" BBK_DIFF_A="10.45864"/>
      <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="-18.54709" BBK_DIFF_A="-13.9089"/>
      <bbk:Obs TIME_PERIOD="2016-09-08" OBS_VALUE="-4.63819" BBK_DIFF_A="0.0465"/>
      <bbk:Obs TIME_PERIOD="2016-09-07" OBS_VALUE="-4.68469" BBK_DIFF_A="-0.06897"/>
      <bbk:Obs TIME_PERIOD="2016-09-06" OBS_VALUE="-4.61572" BBK_DIFF_A="-1.71303"/>
      <bbk:Obs TIME_PERIOD="2016-09-05" OBS_VALUE="-2.90269" BBK_DIFF_A="3.29382"/>
      <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="-6.19651" BBK_DIFF_A="12.65372"/>
      <bbk:Obs TIME_PERIOD="2016-09-01" OBS_VALUE="-18.85023" BBK_DIFF_A="-17.78033"/>
      <bbk:Obs TIME_PERIOD="2016-08-31" OBS_VALUE="-1.0699" BBK_DIFF_A="-4.21659"/>
      <bbk:Obs TIME_PERIOD="2016-08-30" OBS_VALUE="3.14669" BBK_DIFF_A="1.79032"/>
      <bbk:Obs TIME_PERIOD="2016-08-29" OBS_VALUE="1.35637" BBK_DIFF_A="5.47909"/>
      <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="-4.12272" BBK_DIFF_A="0.09423"/>
      <bbk:Obs TIME_PERIOD="2016-08-25" OBS_VALUE="-4.21695" BBK_DIFF_A="1.19412"/>
      <bbk:Obs TIME_PERIOD="2016-08-24" OBS_VALUE="-5.41107" BBK_DIFF_A="14.58893"/>
      <bbk:Obs TIME_PERIOD="2016-08-23" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2016-08-22" OBS_VALUE="-20.0" BBK_DIFF_A="-0.53831"/>
      <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="-19.46169" BBK_DIFF_A="-14.55161"/>
      <bbk:Obs TIME_PERIOD="2016-08-18" OBS_VALUE="-4.91008" BBK_DIFF_A="-0.13622"/>
      <bbk:Obs TIME_PERIOD="2016-08-17" OBS_VALUE="-4.77386" BBK_DIFF_A="-0.05494"/>
      <bbk:Obs TIME_PERIOD="2016-08-16" OBS_VALUE="-4.71892" BBK_DIFF_A="-0.34439"/>
      <bbk:Obs TIME_PERIOD="2016-08-15" OBS_VALUE="-4.37453" BBK_DIFF_A="15.62547"/>
      <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="-20.0" BBK_DIFF_A="-15.65528"/>
      <bbk:Obs TIME_PERIOD="2016-08-11" OBS_VALUE="-4.34472" BBK_DIFF_A="3.88932"/>
      <bbk:Obs TIME_PERIOD="2016-08-10" OBS_VALUE="-8.23404" BBK_DIFF_A="11.76596"/>
      <bbk:Obs TIME_PERIOD="2016-08-09" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2016-08-08" OBS_VALUE="-20.0" BBK_DIFF_A="-0.94538"/>
      <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="-19.05462" BBK_DIFF_A="-14.75517"/>
      <bbk:Obs TIME_PERIOD="2016-08-04" OBS_VALUE="-4.29945" BBK_DIFF_A="-2.75411"/>
      <bbk:Obs TIME_PERIOD="2016-08-03" OBS_VALUE="-1.54534" BBK_DIFF_A="-3.43919"/>
      <bbk:Obs TIME_PERIOD="2016-08-02" OBS_VALUE="1.89385" BBK_DIFF_A="0.08508"/>
      <bbk:Obs TIME_PERIOD="2016-08-01" OBS_VALUE="1.80877" BBK_DIFF_A="-0.27547"/>
      <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="2.08424" BBK_DIFF_A="-14.95955"/>
      <bbk:Obs TIME_PERIOD="2016-07-28" OBS_VALUE="17.04379" BBK_DIFF_A="-0.10455"/>
      <bbk:Obs TIME_PERIOD="2016-07-27" OBS_VALUE="17.14834" BBK_DIFF_A="0.06148"/>
      <bbk:Obs TIME_PERIOD="2016-07-26" OBS_VALUE="17.08686" BBK_DIFF_A="-0.11157"/>
      <bbk:Obs TIME_PERIOD="2016-07-25" OBS_VALUE="17.19843" BBK_DIFF_A="15.62432"/>
      <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="1.57411" BBK_DIFF_A="0.26993"/>
      <bbk:Obs TIME_PERIOD="2016-07-21" OBS_VALUE="1.30418" BBK_DIFF_A="0.30823"/>
      <bbk:Obs TIME_PERIOD="2016-07-20" OBS_VALUE="0.99595" BBK_DIFF_A="-0.10105"/>
      <bbk:Obs TIME_PERIOD="2016-07-19" OBS_VALUE="1.097" BBK_DIFF_A="-0.64503"/>
      <bbk:Obs TIME_PERIOD="2016-07-18" OBS_VALUE="1.74203" BBK_DIFF_A="-0.60535"/>
      <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="2.34738" BBK_DIFF_A="-0.17163"/>
      <bbk:Obs TIME_PERIOD="2016-07-14" OBS_VALUE="2.51901" BBK_DIFF_A="0.35634"/>
      <bbk:Obs TIME_PERIOD="2016-07-13" OBS_VALUE="2.16267" BBK_DIFF_A="0.32333"/>
      <bbk:Obs TIME_PERIOD="2016-07-12" OBS_VALUE="1.83934" BBK_DIFF_A="7.15315"/>
      <bbk:Obs TIME_PERIOD="2016-07-11" OBS_VALUE="-5.31381" BBK_DIFF_A="-0.30943"/>
      <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="-5.00438" BBK_DIFF_A="-0.00704"/>
      <bbk:Obs TIME_PERIOD="2016-07-07" OBS_VALUE="-4.99734" BBK_DIFF_A="0.37947"/>
      <bbk:Obs TIME_PERIOD="2016-07-06" OBS_VALUE="-5.37681" BBK_DIFF_A="0.15154"/>
      <bbk:Obs TIME_PERIOD="2016-07-05" OBS_VALUE="-5.52835" BBK_DIFF_A="-0.4473"/>
      <bbk:Obs TIME_PERIOD="2016-07-04" OBS_VALUE="-5.08105" BBK_DIFF_A="-0.01473"/>
      <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="-5.06632" BBK_DIFF_A="0.02974"/>
      <bbk:Obs TIME_PERIOD="2016-06-30" OBS_VALUE="-5.09606" BBK_DIFF_A="-2.70489"/>
      <bbk:Obs TIME_PERIOD="2016-06-29" OBS_VALUE="-2.39117" BBK_DIFF_A="-0.59435"/>
      <bbk:Obs TIME_PERIOD="2016-06-28" OBS_VALUE="-1.79682" BBK_DIFF_A="0.53602"/>
      <bbk:Obs TIME_PERIOD="2016-06-27" OBS_VALUE="-2.33284" BBK_DIFF_A="2.83471"/>
      <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="-5.16755" BBK_DIFF_A="2.80961"/>
      <bbk:Obs TIME_PERIOD="2016-06-23" OBS_VALUE="-7.97716" BBK_DIFF_A="0.82115"/>
      <bbk:Obs TIME_PERIOD="2016-06-22" OBS_VALUE="-8.79831" BBK_DIFF_A="-0.15743"/>
      <bbk:Obs TIME_PERIOD="2016-06-21" OBS_VALUE="-8.64088" BBK_DIFF_A="-4.10011"/>
      <bbk:Obs TIME_PERIOD="2016-06-20" OBS_VALUE="-4.54077" BBK_DIFF_A="0.45929"/>
      <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="-5.00006" BBK_DIFF_A="0.1799"/>
      <bbk:Obs TIME_PERIOD="2016-06-16" OBS_VALUE="-5.17996" BBK_DIFF_A="0.65978"/>
      <bbk:Obs TIME_PERIOD="2016-06-15" OBS_VALUE="-5.83974" BBK_DIFF_A="-0.43196"/>
      <bbk:Obs TIME_PERIOD="2016-06-14" OBS_VALUE="-5.40778" BBK_DIFF_A="0.4005"/>
      <bbk:Obs TIME_PERIOD="2016-06-13" OBS_VALUE="-5.80828" BBK_DIFF_A="0.00975"/>
      <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="-5.81803" BBK_DIFF_A="-0.07811"/>
      <bbk:Obs TIME_PERIOD="2016-06-09" OBS_VALUE="-5.73992" BBK_DIFF_A="0.22167"/>
      <bbk:Obs TIME_PERIOD="2016-06-08" OBS_VALUE="-5.96159" BBK_DIFF_A="-22.33875"/>
      <bbk:Obs TIME_PERIOD="2016-06-07" OBS_VALUE="16.37716" BBK_DIFF_A="0.12227"/>
      <bbk:Obs TIME_PERIOD="2016-06-06" OBS_VALUE="16.25489" BBK_DIFF_A="0.00967"/>
      <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="16.24522" BBK_DIFF_A="0.0302"/>
      <bbk:Obs TIME_PERIOD="2016-06-02" OBS_VALUE="16.21502" BBK_DIFF_A="0.74793"/>
      <bbk:Obs TIME_PERIOD="2016-06-01" OBS_VALUE="15.46709" BBK_DIFF_A="21.6521"/>
      <bbk:Obs TIME_PERIOD="2016-05-31" OBS_VALUE="-6.18501" BBK_DIFF_A="0.09928"/>
      <bbk:Obs TIME_PERIOD="2016-05-30" OBS_VALUE="-6.28429" BBK_DIFF_A="-0.03491"/>
      <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="-6.24938" BBK_DIFF_A="-0.12726"/>
      <bbk:Obs TIME_PERIOD="2016-05-26" OBS_VALUE="-6.12212" BBK_DIFF_A="0.07757"/>
      <bbk:Obs TIME_PERIOD="2016-05-25" OBS_VALUE="-6.19969" BBK_DIFF_A="0.09968"/>
      <bbk:Obs TIME_PERIOD="2016-05-24" OBS_VALUE="-6.29937" BBK_DIFF_A="-0.07202"/>
      <bbk:Obs TIME_PERIOD="2016-05-23" OBS_VALUE="-6.22735" BBK_DIFF_A="-0.02359"/>
      <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="-6.20376" BBK_DIFF_A="0.00205"/>
      <bbk:Obs TIME_PERIOD="2016-05-19" OBS_VALUE="-6.20581" BBK_DIFF_A="-0.01625"/>
      <bbk:Obs TIME_PERIOD="2016-05-18" OBS_VALUE="-6.18956" BBK_DIFF_A="-0.04097"/>
      <bbk:Obs TIME_PERIOD="2016-05-17" OBS_VALUE="-6.14859" BBK_DIFF_A="0.0723"/>
      <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="-6.22089" BBK_DIFF_A="0.00934"/>
      <bbk:Obs TIME_PERIOD="2016-05-12" OBS_VALUE="-6.23023" BBK_DIFF_A="-0.11717"/>
      <bbk:Obs TIME_PERIOD="2016-05-11" OBS_VALUE="-6.11306" BBK_DIFF_A="0.11681"/>
      <bbk:Obs TIME_PERIOD="2016-05-10" OBS_VALUE="-6.22987" BBK_DIFF_A="0.11343"/>
      <bbk:Obs TIME_PERIOD="2016-05-09" OBS_VALUE="-6.3433" BBK_DIFF_A="13.6567"/>
      <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="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2016-05-05" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2016-05-04" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2016-05-03" OBS_VALUE="-20.0" BBK_DIFF_A="-10.85378"/>
      <bbk:Obs TIME_PERIOD="2016-05-02" OBS_VALUE="-9.14622" BBK_DIFF_A="-25.53429"/>
      <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="16.38807" BBK_DIFF_A="13.53141"/>
      <bbk:Obs TIME_PERIOD="2016-04-28" OBS_VALUE="2.85666" BBK_DIFF_A="-13.44958"/>
      <bbk:Obs TIME_PERIOD="2016-04-27" OBS_VALUE="16.30624" BBK_DIFF_A="-0.01576"/>
      <bbk:Obs TIME_PERIOD="2016-04-26" OBS_VALUE="16.322" BBK_DIFF_A="0.07492"/>
      <bbk:Obs TIME_PERIOD="2016-04-25" OBS_VALUE="16.24708" BBK_DIFF_A="-0.08788"/>
      <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="16.33496" BBK_DIFF_A="-0.18772"/>
      <bbk:Obs TIME_PERIOD="2016-04-21" OBS_VALUE="16.52268" BBK_DIFF_A="0.10982"/>
      <bbk:Obs TIME_PERIOD="2016-04-20" OBS_VALUE="16.41286" BBK_DIFF_A="0.09632"/>
      <bbk:Obs TIME_PERIOD="2016-04-19" OBS_VALUE="16.31654" BBK_DIFF_A="-0.38052"/>
      <bbk:Obs TIME_PERIOD="2016-04-18" OBS_VALUE="16.69706" BBK_DIFF_A="0.19397"/>
      <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="16.50309" BBK_DIFF_A="0.03882"/>
      <bbk:Obs TIME_PERIOD="2016-04-14" OBS_VALUE="16.46427" BBK_DIFF_A="0.13864"/>
      <bbk:Obs TIME_PERIOD="2016-04-13" OBS_VALUE="16.32563" BBK_DIFF_A="-0.07622"/>
      <bbk:Obs TIME_PERIOD="2016-04-12" OBS_VALUE="16.40185" BBK_DIFF_A="11.96125"/>
      <bbk:Obs TIME_PERIOD="2016-04-11" OBS_VALUE="4.4406" BBK_DIFF_A="-12.13484"/>
      <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="16.57544" BBK_DIFF_A="0.05324"/>
      <bbk:Obs TIME_PERIOD="2016-04-07" OBS_VALUE="16.5222" BBK_DIFF_A="0.05407"/>
      <bbk:Obs TIME_PERIOD="2016-04-06" OBS_VALUE="16.46813" BBK_DIFF_A="36.46813"/>
      <bbk:Obs TIME_PERIOD="2016-04-05" OBS_VALUE="-20.0" BBK_DIFF_A="-14.23934"/>
      <bbk:Obs TIME_PERIOD="2016-04-04" OBS_VALUE="-5.76066" BBK_DIFF_A="14.23934"/>
      <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="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2016-03-31" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2016-03-30" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2016-03-29" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <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="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2016-03-23" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2016-03-22" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2016-03-21" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <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="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2016-03-17" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2016-03-16" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2016-03-15" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2016-03-14" OBS_VALUE="-20.0" BBK_DIFF_A="-14.30542"/>
      <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="-5.69458" BBK_DIFF_A="0.18037"/>
      <bbk:Obs TIME_PERIOD="2016-03-10" OBS_VALUE="-5.87495" BBK_DIFF_A="-0.01258"/>
      <bbk:Obs TIME_PERIOD="2016-03-09" OBS_VALUE="-5.86237" BBK_DIFF_A="0.12644"/>
      <bbk:Obs TIME_PERIOD="2016-03-08" OBS_VALUE="-5.98881" BBK_DIFF_A="-0.2062"/>
      <bbk:Obs TIME_PERIOD="2016-03-07" OBS_VALUE="-5.78261" BBK_DIFF_A="-22.54167"/>
      <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="16.75906" BBK_DIFF_A="-0.0626"/>
      <bbk:Obs TIME_PERIOD="2016-03-03" OBS_VALUE="16.82166" BBK_DIFF_A="-0.0348"/>
      <bbk:Obs TIME_PERIOD="2016-03-02" OBS_VALUE="16.85646" BBK_DIFF_A="-0.07351"/>
      <bbk:Obs TIME_PERIOD="2016-03-01" OBS_VALUE="16.92997" BBK_DIFF_A="-0.30787"/>
      <bbk:Obs TIME_PERIOD="2016-02-29" OBS_VALUE="17.23784" BBK_DIFF_A="-0.01302"/>
      <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="17.25086" BBK_DIFF_A="0.15331"/>
      <bbk:Obs TIME_PERIOD="2016-02-25" OBS_VALUE="17.09755" BBK_DIFF_A="0.15302"/>
      <bbk:Obs TIME_PERIOD="2016-02-24" OBS_VALUE="16.94453" BBK_DIFF_A="0.0132"/>
      <bbk:Obs TIME_PERIOD="2016-02-23" OBS_VALUE="16.93133" BBK_DIFF_A="0.08553"/>
      <bbk:Obs TIME_PERIOD="2016-02-22" OBS_VALUE="16.8458" BBK_DIFF_A="-0.09753"/>
      <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="16.94333" BBK_DIFF_A="-0.0159"/>
      <bbk:Obs TIME_PERIOD="2016-02-18" OBS_VALUE="16.95923" BBK_DIFF_A="0.14021"/>
      <bbk:Obs TIME_PERIOD="2016-02-17" OBS_VALUE="16.81902" BBK_DIFF_A="-0.11079"/>
      <bbk:Obs TIME_PERIOD="2016-02-16" OBS_VALUE="16.92981" BBK_DIFF_A="0.10501"/>
      <bbk:Obs TIME_PERIOD="2016-02-15" OBS_VALUE="16.8248" BBK_DIFF_A="-0.13679"/>
      <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="16.96159" BBK_DIFF_A="0.13357"/>
      <bbk:Obs TIME_PERIOD="2016-02-11" OBS_VALUE="16.82802" BBK_DIFF_A="0.07386"/>
      <bbk:Obs TIME_PERIOD="2016-02-10" OBS_VALUE="16.75416" BBK_DIFF_A="0.03166"/>
      <bbk:Obs TIME_PERIOD="2016-02-09" OBS_VALUE="16.7225" BBK_DIFF_A="13.51729"/>
      <bbk:Obs TIME_PERIOD="2016-02-08" OBS_VALUE="3.20521" BBK_DIFF_A="1.40807"/>
      <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="1.79714" BBK_DIFF_A="-0.60894"/>
      <bbk:Obs TIME_PERIOD="2016-02-04" OBS_VALUE="2.40608" BBK_DIFF_A="0.03851"/>
      <bbk:Obs TIME_PERIOD="2016-02-03" OBS_VALUE="2.36757" BBK_DIFF_A="-0.49054"/>
      <bbk:Obs TIME_PERIOD="2016-02-02" OBS_VALUE="2.85811" BBK_DIFF_A="0.80059"/>
      <bbk:Obs TIME_PERIOD="2016-02-01" OBS_VALUE="2.05752" BBK_DIFF_A="0.22008"/>
      <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="1.83744" BBK_DIFF_A="-0.21595"/>
      <bbk:Obs TIME_PERIOD="2016-01-28" OBS_VALUE="2.05339" BBK_DIFF_A="0.58852"/>
      <bbk:Obs TIME_PERIOD="2016-01-27" OBS_VALUE="1.46487" BBK_DIFF_A="0.14069"/>
      <bbk:Obs TIME_PERIOD="2016-01-26" OBS_VALUE="1.32418" BBK_DIFF_A="0.05107"/>
      <bbk:Obs TIME_PERIOD="2016-01-25" OBS_VALUE="1.27311" BBK_DIFF_A="-0.26135"/>
      <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="1.53446" BBK_DIFF_A="0.2341"/>
      <bbk:Obs TIME_PERIOD="2016-01-21" OBS_VALUE="1.30036" BBK_DIFF_A="-14.53738"/>
      <bbk:Obs TIME_PERIOD="2016-01-20" OBS_VALUE="15.83774" BBK_DIFF_A="-0.0714"/>
      <bbk:Obs TIME_PERIOD="2016-01-19" OBS_VALUE="15.90914" BBK_DIFF_A="-0.014"/>
      <bbk:Obs TIME_PERIOD="2016-01-18" OBS_VALUE="15.92314" BBK_DIFF_A="0.07452"/>
      <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="15.84862" BBK_DIFF_A="-0.15067"/>
      <bbk:Obs TIME_PERIOD="2016-01-14" OBS_VALUE="15.99929" BBK_DIFF_A="14.92887"/>
      <bbk:Obs TIME_PERIOD="2016-01-13" OBS_VALUE="1.07042" BBK_DIFF_A="-0.2761"/>
      <bbk:Obs TIME_PERIOD="2016-01-12" OBS_VALUE="1.34652" BBK_DIFF_A="0.07965"/>
      <bbk:Obs TIME_PERIOD="2016-01-11" OBS_VALUE="1.26687" BBK_DIFF_A="-0.6308"/>
      <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="1.89767" BBK_DIFF_A="0.19085"/>
      <bbk:Obs TIME_PERIOD="2016-01-07" OBS_VALUE="1.70682" BBK_DIFF_A="0.34741"/>
      <bbk:Obs TIME_PERIOD="2016-01-06" OBS_VALUE="1.35941" BBK_DIFF_A="-2.76344"/>
      <bbk:Obs TIME_PERIOD="2016-01-05" OBS_VALUE="4.12285" BBK_DIFF_A="2.71344"/>
      <bbk:Obs TIME_PERIOD="2016-01-04" OBS_VALUE="1.40941" BBK_DIFF_A="0.09929"/>
      <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="1.31012" BBK_DIFF_A="-0.46923"/>
      <bbk:Obs TIME_PERIOD="2015-12-29" OBS_VALUE="1.77935" BBK_DIFF_A="0.06439"/>
      <bbk:Obs TIME_PERIOD="2015-12-28" OBS_VALUE="1.71496" BBK_DIFF_A="-0.18281"/>
      <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="1.89777" BBK_DIFF_A="8.04934"/>
      <bbk:Obs TIME_PERIOD="2015-12-22" OBS_VALUE="-6.15157" BBK_DIFF_A="-0.01709"/>
      <bbk:Obs TIME_PERIOD="2015-12-21" OBS_VALUE="-6.13448" BBK_DIFF_A="-0.0748"/>
      <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="-6.05968" BBK_DIFF_A="0.29383"/>
      <bbk:Obs TIME_PERIOD="2015-12-17" OBS_VALUE="-6.35351" BBK_DIFF_A="0.08573"/>
      <bbk:Obs TIME_PERIOD="2015-12-16" OBS_VALUE="-6.43924" BBK_DIFF_A="0.10506"/>
      <bbk:Obs TIME_PERIOD="2015-12-15" OBS_VALUE="-6.5443" BBK_DIFF_A="-0.09214"/>
      <bbk:Obs TIME_PERIOD="2015-12-14" OBS_VALUE="-6.45216" BBK_DIFF_A="0.06098"/>
      <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="-6.51314" BBK_DIFF_A="0.0388"/>
      <bbk:Obs TIME_PERIOD="2015-12-10" OBS_VALUE="-6.55194" BBK_DIFF_A="-0.23099"/>
      <bbk:Obs TIME_PERIOD="2015-12-09" OBS_VALUE="-6.32095" BBK_DIFF_A="0.04892"/>
      <bbk:Obs TIME_PERIOD="2015-12-08" OBS_VALUE="-6.36987" BBK_DIFF_A="-0.01982"/>
      <bbk:Obs TIME_PERIOD="2015-12-07" OBS_VALUE="-6.35005" BBK_DIFF_A="0.12824"/>
      <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="-6.47829" BBK_DIFF_A="0.37629"/>
      <bbk:Obs TIME_PERIOD="2015-12-03" OBS_VALUE="-6.85458" BBK_DIFF_A="-0.07492"/>
      <bbk:Obs TIME_PERIOD="2015-12-02" OBS_VALUE="-6.77966" BBK_DIFF_A="-0.10822"/>
      <bbk:Obs TIME_PERIOD="2015-12-01" OBS_VALUE="-6.67144" BBK_DIFF_A="-2.06925"/>
      <bbk:Obs TIME_PERIOD="2015-11-30" OBS_VALUE="-4.60219" BBK_DIFF_A="1.97683"/>
      <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="-6.57902" BBK_DIFF_A="0.03932"/>
      <bbk:Obs TIME_PERIOD="2015-11-26" OBS_VALUE="-6.61834" BBK_DIFF_A="-0.02402"/>
      <bbk:Obs TIME_PERIOD="2015-11-25" OBS_VALUE="-6.59432" BBK_DIFF_A="-0.05529"/>
      <bbk:Obs TIME_PERIOD="2015-11-24" OBS_VALUE="-6.53903" BBK_DIFF_A="-0.0065"/>
      <bbk:Obs TIME_PERIOD="2015-11-23" OBS_VALUE="-6.53253" BBK_DIFF_A="-0.08043"/>
      <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="-6.4521" BBK_DIFF_A="0.28594"/>
      <bbk:Obs TIME_PERIOD="2015-11-19" OBS_VALUE="-6.73804" BBK_DIFF_A="-0.11075"/>
      <bbk:Obs TIME_PERIOD="2015-11-18" OBS_VALUE="-6.62729" BBK_DIFF_A="0.02105"/>
      <bbk:Obs TIME_PERIOD="2015-11-17" OBS_VALUE="-6.64834" BBK_DIFF_A="-0.06813"/>
      <bbk:Obs TIME_PERIOD="2015-11-16" OBS_VALUE="-6.58021" BBK_DIFF_A="0.11909"/>
      <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="-6.6993" BBK_DIFF_A="-0.02268"/>
      <bbk:Obs TIME_PERIOD="2015-11-12" OBS_VALUE="-6.67662" BBK_DIFF_A="-0.07583"/>
      <bbk:Obs TIME_PERIOD="2015-11-11" OBS_VALUE="-6.60079" BBK_DIFF_A="-0.03562"/>
      <bbk:Obs TIME_PERIOD="2015-11-10" OBS_VALUE="-6.56517" BBK_DIFF_A="-0.27424"/>
      <bbk:Obs TIME_PERIOD="2015-11-09" OBS_VALUE="-6.29093" BBK_DIFF_A="0.1607"/>
      <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="-6.45163" BBK_DIFF_A="-0.16626"/>
      <bbk:Obs TIME_PERIOD="2015-11-05" OBS_VALUE="-6.28537" BBK_DIFF_A="-0.0181"/>
      <bbk:Obs TIME_PERIOD="2015-11-04" OBS_VALUE="-6.26727" BBK_DIFF_A="-0.16456"/>
      <bbk:Obs TIME_PERIOD="2015-11-03" OBS_VALUE="-6.10271" BBK_DIFF_A="0.01376"/>
      <bbk:Obs TIME_PERIOD="2015-11-02" OBS_VALUE="-6.11647" BBK_DIFF_A="-0.36403"/>
      <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="-5.75244" BBK_DIFF_A="0.18908"/>
      <bbk:Obs TIME_PERIOD="2015-10-29" OBS_VALUE="-5.94152" BBK_DIFF_A="0.17517"/>
      <bbk:Obs TIME_PERIOD="2015-10-28" OBS_VALUE="-6.11669" BBK_DIFF_A="0.07739"/>
      <bbk:Obs TIME_PERIOD="2015-10-27" OBS_VALUE="-6.19408" BBK_DIFF_A="-22.41719"/>
      <bbk:Obs TIME_PERIOD="2015-10-26" OBS_VALUE="16.22311" BBK_DIFF_A="-0.06126"/>
      <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="16.28437" BBK_DIFF_A="-0.19772"/>
      <bbk:Obs TIME_PERIOD="2015-10-22" OBS_VALUE="16.48209" BBK_DIFF_A="-3.51791"/>
      <bbk:Obs TIME_PERIOD="2015-10-21" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2015-10-20" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2015-10-19" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <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="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2015-10-15" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2015-10-14" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2015-10-13" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2015-10-12" OBS_VALUE="20.0" 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="20.0" BBK_DIFF_A="1.85265"/>
      <bbk:Obs TIME_PERIOD="2015-10-08" OBS_VALUE="18.14735" BBK_DIFF_A="-1.85265"/>
      <bbk:Obs TIME_PERIOD="2015-10-07" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2015-10-06" OBS_VALUE="20.0" BBK_DIFF_A="8.34763"/>
      <bbk:Obs TIME_PERIOD="2015-10-05" OBS_VALUE="11.65237" BBK_DIFF_A="-8.34763"/>
      <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="20.0" BBK_DIFF_A="4.59769"/>
      <bbk:Obs TIME_PERIOD="2015-10-01" OBS_VALUE="15.40231" BBK_DIFF_A="3.62919"/>
      <bbk:Obs TIME_PERIOD="2015-09-30" OBS_VALUE="11.77312" BBK_DIFF_A="-8.22688"/>
      <bbk:Obs TIME_PERIOD="2015-09-29" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2015-09-28" OBS_VALUE="20.0" BBK_DIFF_A="12.4069"/>
      <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="7.5931" BBK_DIFF_A="0.30009"/>
      <bbk:Obs TIME_PERIOD="2015-09-24" OBS_VALUE="7.29301" BBK_DIFF_A="0.09702"/>
      <bbk:Obs TIME_PERIOD="2015-09-23" OBS_VALUE="7.19599" BBK_DIFF_A="-0.84491"/>
      <bbk:Obs TIME_PERIOD="2015-09-22" OBS_VALUE="8.0409" BBK_DIFF_A="0.30908"/>
      <bbk:Obs TIME_PERIOD="2015-09-21" OBS_VALUE="7.73182" BBK_DIFF_A="-2.45331"/>
      <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="10.18513" BBK_DIFF_A="2.9179"/>
      <bbk:Obs TIME_PERIOD="2015-09-17" OBS_VALUE="7.26723" BBK_DIFF_A="0.68392"/>
      <bbk:Obs TIME_PERIOD="2015-09-16" OBS_VALUE="6.58331" BBK_DIFF_A="-13.41669"/>
      <bbk:Obs TIME_PERIOD="2015-09-15" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2015-09-14" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <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="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2015-09-10" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2015-09-09" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2015-09-08" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2015-09-07" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <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="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2015-09-03" OBS_VALUE="20.0" BBK_DIFF_A="12.34104"/>
      <bbk:Obs TIME_PERIOD="2015-09-02" OBS_VALUE="7.65896" BBK_DIFF_A="1.05005"/>
      <bbk:Obs TIME_PERIOD="2015-09-01" OBS_VALUE="6.60891" BBK_DIFF_A="-13.39109"/>
      <bbk:Obs TIME_PERIOD="2015-08-31" OBS_VALUE="20.0" 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="20.0" BBK_DIFF_A="3.55516"/>
      <bbk:Obs TIME_PERIOD="2015-08-27" OBS_VALUE="16.44484" BBK_DIFF_A="0.05979"/>
      <bbk:Obs TIME_PERIOD="2015-08-26" OBS_VALUE="16.38505" BBK_DIFF_A="15.12294"/>
      <bbk:Obs TIME_PERIOD="2015-08-25" OBS_VALUE="1.26211" BBK_DIFF_A="-15.44556"/>
      <bbk:Obs TIME_PERIOD="2015-08-24" OBS_VALUE="16.70767" BBK_DIFF_A="0.07943"/>
      <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="16.62824" BBK_DIFF_A="14.7771"/>
      <bbk:Obs TIME_PERIOD="2015-08-20" OBS_VALUE="1.85114" BBK_DIFF_A="-14.74758"/>
      <bbk:Obs TIME_PERIOD="2015-08-19" OBS_VALUE="16.59872" BBK_DIFF_A="-0.01181"/>
      <bbk:Obs TIME_PERIOD="2015-08-18" OBS_VALUE="16.61053" BBK_DIFF_A="0.09219"/>
      <bbk:Obs TIME_PERIOD="2015-08-17" OBS_VALUE="16.51834" BBK_DIFF_A="-0.06782"/>
      <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="16.58616" BBK_DIFF_A="14.81157"/>
      <bbk:Obs TIME_PERIOD="2015-08-13" OBS_VALUE="1.77459" BBK_DIFF_A="-14.6877"/>
      <bbk:Obs TIME_PERIOD="2015-08-12" OBS_VALUE="16.46229" BBK_DIFF_A="14.95797"/>
      <bbk:Obs TIME_PERIOD="2015-08-11" OBS_VALUE="1.50432" BBK_DIFF_A="0.04545"/>
      <bbk:Obs TIME_PERIOD="2015-08-10" OBS_VALUE="1.45887" BBK_DIFF_A="0.19766"/>
      <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="1.26121" BBK_DIFF_A="-0.04816"/>
      <bbk:Obs TIME_PERIOD="2015-08-06" OBS_VALUE="1.30937" BBK_DIFF_A="0.35463"/>
      <bbk:Obs TIME_PERIOD="2015-08-05" OBS_VALUE="0.95474" BBK_DIFF_A="-0.33798"/>
      <bbk:Obs TIME_PERIOD="2015-08-04" OBS_VALUE="1.29272" BBK_DIFF_A="-18.70728"/>
      <bbk:Obs TIME_PERIOD="2015-08-03" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <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="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2015-07-30" OBS_VALUE="20.0" BBK_DIFF_A="3.68544"/>
      <bbk:Obs TIME_PERIOD="2015-07-29" OBS_VALUE="16.31456" BBK_DIFF_A="36.31456"/>
      <bbk:Obs TIME_PERIOD="2015-07-28" OBS_VALUE="-20.0" BBK_DIFF_A="-14.4615"/>
      <bbk:Obs TIME_PERIOD="2015-07-27" OBS_VALUE="-5.5385" BBK_DIFF_A="0.317"/>
      <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="-5.8555" BBK_DIFF_A="0.01854"/>
      <bbk:Obs TIME_PERIOD="2015-07-23" OBS_VALUE="-5.87404" BBK_DIFF_A="0.19022"/>
      <bbk:Obs TIME_PERIOD="2015-07-22" OBS_VALUE="-6.06426" BBK_DIFF_A="-0.07237"/>
      <bbk:Obs TIME_PERIOD="2015-07-21" OBS_VALUE="-5.99189" BBK_DIFF_A="0.15574"/>
      <bbk:Obs TIME_PERIOD="2015-07-20" OBS_VALUE="-6.14763" BBK_DIFF_A="0.05675"/>
      <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="-6.20438" BBK_DIFF_A="0.04076"/>
      <bbk:Obs TIME_PERIOD="2015-07-16" OBS_VALUE="-6.24514" BBK_DIFF_A="0.08952"/>
      <bbk:Obs TIME_PERIOD="2015-07-15" OBS_VALUE="-6.33466" BBK_DIFF_A="-0.11172"/>
      <bbk:Obs TIME_PERIOD="2015-07-14" OBS_VALUE="-6.22294" BBK_DIFF_A="-14.69452"/>
      <bbk:Obs TIME_PERIOD="2015-07-13" OBS_VALUE="8.47158" BBK_DIFF_A="1.25898"/>
      <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="7.2126" BBK_DIFF_A="-0.10932"/>
      <bbk:Obs TIME_PERIOD="2015-07-09" OBS_VALUE="7.32192" BBK_DIFF_A="0.34188"/>
      <bbk:Obs TIME_PERIOD="2015-07-08" OBS_VALUE="6.98004" BBK_DIFF_A="-0.62108"/>
      <bbk:Obs TIME_PERIOD="2015-07-07" OBS_VALUE="7.60112" BBK_DIFF_A="0.36879"/>
      <bbk:Obs TIME_PERIOD="2015-07-06" OBS_VALUE="7.23233" BBK_DIFF_A="-0.24772"/>
      <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="7.48005" BBK_DIFF_A="0.71112"/>
      <bbk:Obs TIME_PERIOD="2015-07-02" OBS_VALUE="6.76893" BBK_DIFF_A="0.36054"/>
      <bbk:Obs TIME_PERIOD="2015-07-01" OBS_VALUE="6.40839" BBK_DIFF_A="0.07235"/>
      <bbk:Obs TIME_PERIOD="2015-06-30" OBS_VALUE="6.33604" BBK_DIFF_A="6.80101"/>
      <bbk:Obs TIME_PERIOD="2015-06-29" OBS_VALUE="-0.46497" BBK_DIFF_A="-3.77571"/>
      <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="3.31074" BBK_DIFF_A="0.05221"/>
      <bbk:Obs TIME_PERIOD="2015-06-25" OBS_VALUE="3.25853" BBK_DIFF_A="-0.54066"/>
      <bbk:Obs TIME_PERIOD="2015-06-24" OBS_VALUE="3.79919" BBK_DIFF_A="0.41019"/>
      <bbk:Obs TIME_PERIOD="2015-06-23" OBS_VALUE="3.389" BBK_DIFF_A="1.37608"/>
      <bbk:Obs TIME_PERIOD="2015-06-22" OBS_VALUE="2.01292" BBK_DIFF_A="-1.02801"/>
      <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="3.04093" BBK_DIFF_A="1.37732"/>
      <bbk:Obs TIME_PERIOD="2015-06-18" OBS_VALUE="1.66361" BBK_DIFF_A="-0.08555"/>
      <bbk:Obs TIME_PERIOD="2015-06-17" OBS_VALUE="1.74916" BBK_DIFF_A="0.40544"/>
      <bbk:Obs TIME_PERIOD="2015-06-16" OBS_VALUE="1.34372" BBK_DIFF_A="-0.0297"/>
      <bbk:Obs TIME_PERIOD="2015-06-15" OBS_VALUE="1.37342" BBK_DIFF_A="-1.53109"/>
      <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="2.90451" BBK_DIFF_A="-13.35295"/>
      <bbk:Obs TIME_PERIOD="2015-06-11" OBS_VALUE="16.25746" BBK_DIFF_A="-0.1001"/>
      <bbk:Obs TIME_PERIOD="2015-06-10" OBS_VALUE="16.35756" BBK_DIFF_A="0.83331"/>
      <bbk:Obs TIME_PERIOD="2015-06-09" OBS_VALUE="15.52425" BBK_DIFF_A="16.4495"/>
      <bbk:Obs TIME_PERIOD="2015-06-08" OBS_VALUE="-0.92525" BBK_DIFF_A="0.00623"/>
      <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="-0.93148" BBK_DIFF_A="0.75119"/>
      <bbk:Obs TIME_PERIOD="2015-06-04" OBS_VALUE="-1.68267" BBK_DIFF_A="0.24079"/>
      <bbk:Obs TIME_PERIOD="2015-06-03" OBS_VALUE="-1.92346" BBK_DIFF_A="0.25935"/>
      <bbk:Obs TIME_PERIOD="2015-06-02" OBS_VALUE="-2.18281" BBK_DIFF_A="-0.24219"/>
      <bbk:Obs TIME_PERIOD="2015-06-01" OBS_VALUE="-1.94062" BBK_DIFF_A="0.39465"/>
      <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="-2.33527" BBK_DIFF_A="-0.42512"/>
      <bbk:Obs TIME_PERIOD="2015-05-28" OBS_VALUE="-1.91015" BBK_DIFF_A="0.81054"/>
      <bbk:Obs TIME_PERIOD="2015-05-27" OBS_VALUE="-2.72069" BBK_DIFF_A="-0.79802"/>
      <bbk:Obs TIME_PERIOD="2015-05-26" OBS_VALUE="-1.92267" BBK_DIFF_A="-18.4944"/>
      <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="16.57173" BBK_DIFF_A="-0.03581"/>
      <bbk:Obs TIME_PERIOD="2015-05-21" OBS_VALUE="16.60754" BBK_DIFF_A="-0.12688"/>
      <bbk:Obs TIME_PERIOD="2015-05-20" OBS_VALUE="16.73442" BBK_DIFF_A="-0.05901"/>
      <bbk:Obs TIME_PERIOD="2015-05-19" OBS_VALUE="16.79343" BBK_DIFF_A="0.07977"/>
      <bbk:Obs TIME_PERIOD="2015-05-18" OBS_VALUE="16.71366" BBK_DIFF_A="-0.13686"/>
      <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="16.85052" BBK_DIFF_A="-0.0437"/>
      <bbk:Obs TIME_PERIOD="2015-05-14" OBS_VALUE="16.89422" BBK_DIFF_A="0.0111"/>
      <bbk:Obs TIME_PERIOD="2015-05-13" OBS_VALUE="16.88312" BBK_DIFF_A="0.05828"/>
      <bbk:Obs TIME_PERIOD="2015-05-12" OBS_VALUE="16.82484" BBK_DIFF_A="-0.16921"/>
      <bbk:Obs TIME_PERIOD="2015-05-11" OBS_VALUE="16.99405" BBK_DIFF_A="0.02616"/>
      <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="16.96789" BBK_DIFF_A="16.13453"/>
      <bbk:Obs TIME_PERIOD="2015-05-07" OBS_VALUE="0.83336" BBK_DIFF_A="-0.51674"/>
      <bbk:Obs TIME_PERIOD="2015-05-06" OBS_VALUE="1.3501" BBK_DIFF_A="-3.43178"/>
      <bbk:Obs TIME_PERIOD="2015-05-05" OBS_VALUE="4.78188" BBK_DIFF_A="0.18175"/>
      <bbk:Obs TIME_PERIOD="2015-05-04" OBS_VALUE="4.60013" BBK_DIFF_A="-3.18756"/>
      <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="7.78769" BBK_DIFF_A="6.94751"/>
      <bbk:Obs TIME_PERIOD="2015-04-29" OBS_VALUE="0.84018" BBK_DIFF_A="0.21895"/>
      <bbk:Obs TIME_PERIOD="2015-04-28" OBS_VALUE="0.62123" BBK_DIFF_A="-0.92588"/>
      <bbk:Obs TIME_PERIOD="2015-04-27" OBS_VALUE="1.54711" BBK_DIFF_A="0.58932"/>
      <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="0.95779" BBK_DIFF_A="-0.34914"/>
      <bbk:Obs TIME_PERIOD="2015-04-23" OBS_VALUE="1.30693" BBK_DIFF_A="0.80928"/>
      <bbk:Obs TIME_PERIOD="2015-04-22" OBS_VALUE="0.49765" BBK_DIFF_A="0.18813"/>
      <bbk:Obs TIME_PERIOD="2015-04-21" OBS_VALUE="0.30952" BBK_DIFF_A="0.11925"/>
      <bbk:Obs TIME_PERIOD="2015-04-20" OBS_VALUE="0.19027" BBK_DIFF_A="-0.69647"/>
      <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="0.88674" BBK_DIFF_A="-0.22596"/>
      <bbk:Obs TIME_PERIOD="2015-04-16" OBS_VALUE="1.1127" BBK_DIFF_A="0.49925"/>
      <bbk:Obs TIME_PERIOD="2015-04-15" OBS_VALUE="0.61345" BBK_DIFF_A="-0.32329"/>
      <bbk:Obs TIME_PERIOD="2015-04-14" OBS_VALUE="0.93674" BBK_DIFF_A="-0.08094"/>
      <bbk:Obs TIME_PERIOD="2015-04-13" OBS_VALUE="1.01768" BBK_DIFF_A="-0.11192"/>
      <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="1.1296" BBK_DIFF_A="0.84791"/>
      <bbk:Obs TIME_PERIOD="2015-04-09" OBS_VALUE="0.28169" BBK_DIFF_A="-0.41842"/>
      <bbk:Obs TIME_PERIOD="2015-04-08" OBS_VALUE="0.70011" BBK_DIFF_A="-0.34242"/>
      <bbk:Obs TIME_PERIOD="2015-04-07" OBS_VALUE="1.04253" BBK_DIFF_A="0.0401"/>
      <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="1.00243" BBK_DIFF_A="0.14167"/>
      <bbk:Obs TIME_PERIOD="2015-04-01" OBS_VALUE="0.86076" BBK_DIFF_A="-0.21886"/>
      <bbk:Obs TIME_PERIOD="2015-03-31" OBS_VALUE="1.07962" BBK_DIFF_A="-0.28684"/>
      <bbk:Obs TIME_PERIOD="2015-03-30" OBS_VALUE="1.36646" BBK_DIFF_A="0.19237"/>
      <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="1.17409" BBK_DIFF_A="-0.22274"/>
      <bbk:Obs TIME_PERIOD="2015-03-26" OBS_VALUE="1.39683" BBK_DIFF_A="-0.09067"/>
      <bbk:Obs TIME_PERIOD="2015-03-25" OBS_VALUE="1.4875" BBK_DIFF_A="-0.03899"/>
      <bbk:Obs TIME_PERIOD="2015-03-24" OBS_VALUE="1.52649" BBK_DIFF_A="0.07273"/>
      <bbk:Obs TIME_PERIOD="2015-03-23" OBS_VALUE="1.45376" BBK_DIFF_A="-0.05718"/>
      <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="1.51094" BBK_DIFF_A="0.18137"/>
      <bbk:Obs TIME_PERIOD="2015-03-19" OBS_VALUE="1.32957" BBK_DIFF_A="-0.26455"/>
      <bbk:Obs TIME_PERIOD="2015-03-18" OBS_VALUE="1.59412" BBK_DIFF_A="-0.03482"/>
      <bbk:Obs TIME_PERIOD="2015-03-17" OBS_VALUE="1.62894" BBK_DIFF_A="-0.00391"/>
      <bbk:Obs TIME_PERIOD="2015-03-16" OBS_VALUE="1.63285" BBK_DIFF_A="-0.59517"/>
      <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="2.22802" BBK_DIFF_A="0.04795"/>
      <bbk:Obs TIME_PERIOD="2015-03-12" OBS_VALUE="2.18007" BBK_DIFF_A="0.32581"/>
      <bbk:Obs TIME_PERIOD="2015-03-11" OBS_VALUE="1.85426" BBK_DIFF_A="-0.27732"/>
      <bbk:Obs TIME_PERIOD="2015-03-10" OBS_VALUE="2.13158" BBK_DIFF_A="-0.26787"/>
      <bbk:Obs TIME_PERIOD="2015-03-09" OBS_VALUE="2.39945" BBK_DIFF_A="0.05574"/>
      <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="2.34371" BBK_DIFF_A="0.4827"/>
      <bbk:Obs TIME_PERIOD="2015-03-05" OBS_VALUE="1.86101" BBK_DIFF_A="0.05806"/>
      <bbk:Obs TIME_PERIOD="2015-03-04" OBS_VALUE="1.80295" BBK_DIFF_A="-0.09414"/>
      <bbk:Obs TIME_PERIOD="2015-03-03" OBS_VALUE="1.89709" BBK_DIFF_A="0.41431"/>
      <bbk:Obs TIME_PERIOD="2015-03-02" OBS_VALUE="1.48278" BBK_DIFF_A="0.13692"/>
      <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="1.34586" BBK_DIFF_A="-0.90676"/>
      <bbk:Obs TIME_PERIOD="2015-02-26" OBS_VALUE="2.25262" BBK_DIFF_A="1.06641"/>
      <bbk:Obs TIME_PERIOD="2015-02-25" OBS_VALUE="1.18621" BBK_DIFF_A="-0.00296"/>
      <bbk:Obs TIME_PERIOD="2015-02-24" OBS_VALUE="1.18917" BBK_DIFF_A="0.07574"/>
      <bbk:Obs TIME_PERIOD="2015-02-23" OBS_VALUE="1.11343" BBK_DIFF_A="0.02044"/>
      <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="1.09299" BBK_DIFF_A="0.04333"/>
      <bbk:Obs TIME_PERIOD="2015-02-19" OBS_VALUE="1.04966" BBK_DIFF_A="-0.2635"/>
      <bbk:Obs TIME_PERIOD="2015-02-18" OBS_VALUE="1.31316" BBK_DIFF_A="-0.0314"/>
      <bbk:Obs TIME_PERIOD="2015-02-17" OBS_VALUE="1.34456" BBK_DIFF_A="-0.18403"/>
      <bbk:Obs TIME_PERIOD="2015-02-16" OBS_VALUE="1.52859" BBK_DIFF_A="0.37468"/>
      <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="1.15391" BBK_DIFF_A="-0.15065"/>
      <bbk:Obs TIME_PERIOD="2015-02-12" OBS_VALUE="1.30456" BBK_DIFF_A="0.73837"/>
      <bbk:Obs TIME_PERIOD="2015-02-11" OBS_VALUE="0.56619" BBK_DIFF_A="-0.39909"/>
      <bbk:Obs TIME_PERIOD="2015-02-10" OBS_VALUE="0.96528" BBK_DIFF_A="-0.00108"/>
      <bbk:Obs TIME_PERIOD="2015-02-09" OBS_VALUE="0.96636" BBK_DIFF_A="-0.13007"/>
      <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="1.09643" BBK_DIFF_A="-0.41951"/>
      <bbk:Obs TIME_PERIOD="2015-02-05" OBS_VALUE="1.51594" BBK_DIFF_A="0.33304"/>
      <bbk:Obs TIME_PERIOD="2015-02-04" OBS_VALUE="1.1829" BBK_DIFF_A="-0.21266"/>
      <bbk:Obs TIME_PERIOD="2015-02-03" OBS_VALUE="1.39556" BBK_DIFF_A="-0.04401"/>
      <bbk:Obs TIME_PERIOD="2015-02-02" OBS_VALUE="1.43957" BBK_DIFF_A="-0.05973"/>
      <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="1.4993" BBK_DIFF_A="0.21748"/>
      <bbk:Obs TIME_PERIOD="2015-01-29" OBS_VALUE="1.28182" BBK_DIFF_A="-0.32054"/>
      <bbk:Obs TIME_PERIOD="2015-01-28" OBS_VALUE="1.60236" BBK_DIFF_A="-0.0442"/>
      <bbk:Obs TIME_PERIOD="2015-01-27" OBS_VALUE="1.64656" BBK_DIFF_A="1.09504"/>
      <bbk:Obs TIME_PERIOD="2015-01-26" OBS_VALUE="0.55152" BBK_DIFF_A="-0.17761"/>
      <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="0.72913" BBK_DIFF_A="0.24442"/>
      <bbk:Obs TIME_PERIOD="2015-01-22" OBS_VALUE="0.48471" BBK_DIFF_A="-0.02494"/>
      <bbk:Obs TIME_PERIOD="2015-01-21" OBS_VALUE="0.50965" BBK_DIFF_A="-0.36875"/>
      <bbk:Obs TIME_PERIOD="2015-01-20" OBS_VALUE="0.8784" BBK_DIFF_A="-0.28338"/>
      <bbk:Obs TIME_PERIOD="2015-01-19" OBS_VALUE="1.16178" BBK_DIFF_A="0.01984"/>
      <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="1.14194" BBK_DIFF_A="-0.03616"/>
      <bbk:Obs TIME_PERIOD="2015-01-15" OBS_VALUE="1.1781" BBK_DIFF_A="0.02217"/>
      <bbk:Obs TIME_PERIOD="2015-01-14" OBS_VALUE="1.15593" BBK_DIFF_A="0.06401"/>
      <bbk:Obs TIME_PERIOD="2015-01-13" OBS_VALUE="1.09192" BBK_DIFF_A="-0.06129"/>
      <bbk:Obs TIME_PERIOD="2015-01-12" OBS_VALUE="1.15321" BBK_DIFF_A="0.42101"/>
      <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="0.7322" BBK_DIFF_A="0.31766"/>
      <bbk:Obs TIME_PERIOD="2015-01-08" OBS_VALUE="0.41454" BBK_DIFF_A="-1.25023"/>
      <bbk:Obs TIME_PERIOD="2015-01-07" OBS_VALUE="1.66477" BBK_DIFF_A="0.43362"/>
      <bbk:Obs TIME_PERIOD="2015-01-06" OBS_VALUE="1.23115" BBK_DIFF_A="0.04455"/>
      <bbk:Obs TIME_PERIOD="2015-01-05" OBS_VALUE="1.1866" BBK_DIFF_A="0.15684"/>
      <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="1.02976" BBK_DIFF_A="0.10433"/>
      <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="0.92543" BBK_DIFF_A="-0.31737"/>
      <bbk:Obs TIME_PERIOD="2014-12-29" OBS_VALUE="1.2428" BBK_DIFF_A="0.01715"/>
      <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="1.22565" BBK_DIFF_A="6.7129"/>
      <bbk:Obs TIME_PERIOD="2014-12-22" OBS_VALUE="-5.48725" BBK_DIFF_A="0.02726"/>
      <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="-5.51451" BBK_DIFF_A="-25.51451"/>
      <bbk:Obs TIME_PERIOD="2014-12-18" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2014-12-17" OBS_VALUE="20.0" BBK_DIFF_A="20.81626"/>
      <bbk:Obs TIME_PERIOD="2014-12-16" OBS_VALUE="-0.81626" BBK_DIFF_A="-0.00702"/>
      <bbk:Obs TIME_PERIOD="2014-12-15" OBS_VALUE="-0.80924" BBK_DIFF_A="0.14019"/>
      <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="-0.94943" BBK_DIFF_A="-0.14401"/>
      <bbk:Obs TIME_PERIOD="2014-12-11" OBS_VALUE="-0.80542" BBK_DIFF_A="-20.80542"/>
      <bbk:Obs TIME_PERIOD="2014-12-10" OBS_VALUE="20.0" BBK_DIFF_A="40.0"/>
      <bbk:Obs TIME_PERIOD="2014-12-09" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2014-12-08" OBS_VALUE="-20.0" BBK_DIFF_A="-21.02611"/>
      <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="1.02611" BBK_DIFF_A="0.02559"/>
      <bbk:Obs TIME_PERIOD="2014-12-04" OBS_VALUE="1.00052" BBK_DIFF_A="0.25573"/>
      <bbk:Obs TIME_PERIOD="2014-12-03" OBS_VALUE="0.74479" BBK_DIFF_A="-15.28015"/>
      <bbk:Obs TIME_PERIOD="2014-12-02" OBS_VALUE="16.02494" BBK_DIFF_A="0.01907"/>
      <bbk:Obs TIME_PERIOD="2014-12-01" OBS_VALUE="16.00587" BBK_DIFF_A="15.23337"/>
      <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="0.7725" BBK_DIFF_A="-0.3316"/>
      <bbk:Obs TIME_PERIOD="2014-11-27" OBS_VALUE="1.1041" BBK_DIFF_A="-14.66474"/>
      <bbk:Obs TIME_PERIOD="2014-11-26" OBS_VALUE="15.76884" BBK_DIFF_A="14.59143"/>
      <bbk:Obs TIME_PERIOD="2014-11-25" OBS_VALUE="1.17741" BBK_DIFF_A="-18.82259"/>
      <bbk:Obs TIME_PERIOD="2014-11-24" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <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="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2014-11-20" OBS_VALUE="20.0" BBK_DIFF_A="0.47125"/>
      <bbk:Obs TIME_PERIOD="2014-11-19" OBS_VALUE="19.52875" BBK_DIFF_A="20.87111"/>
      <bbk:Obs TIME_PERIOD="2014-11-18" OBS_VALUE="-1.34236" BBK_DIFF_A="0.00299"/>
      <bbk:Obs TIME_PERIOD="2014-11-17" OBS_VALUE="-1.34535" BBK_DIFF_A="0.40608"/>
      <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="-1.75143" BBK_DIFF_A="-2.98024"/>
      <bbk:Obs TIME_PERIOD="2014-11-13" OBS_VALUE="1.22881" BBK_DIFF_A="-0.21737"/>
      <bbk:Obs TIME_PERIOD="2014-11-12" OBS_VALUE="1.44618" BBK_DIFF_A="0.66292"/>
      <bbk:Obs TIME_PERIOD="2014-11-11" OBS_VALUE="0.78326" BBK_DIFF_A="-0.22313"/>
      <bbk:Obs TIME_PERIOD="2014-11-10" OBS_VALUE="1.00639" BBK_DIFF_A="-0.62174"/>
      <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="1.62813" BBK_DIFF_A="0.85418"/>
      <bbk:Obs TIME_PERIOD="2014-11-06" OBS_VALUE="0.77395" BBK_DIFF_A="-0.95332"/>
      <bbk:Obs TIME_PERIOD="2014-11-05" OBS_VALUE="1.72727" BBK_DIFF_A="0.26121"/>
      <bbk:Obs TIME_PERIOD="2014-11-04" OBS_VALUE="1.46606" BBK_DIFF_A="-0.06321"/>
      <bbk:Obs TIME_PERIOD="2014-11-03" OBS_VALUE="1.52927" BBK_DIFF_A="0.12751"/>
      <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="1.40176" BBK_DIFF_A="0.27833"/>
      <bbk:Obs TIME_PERIOD="2014-10-30" OBS_VALUE="1.12343" BBK_DIFF_A="0.14837"/>
      <bbk:Obs TIME_PERIOD="2014-10-29" OBS_VALUE="0.97506" BBK_DIFF_A="0.13311"/>
      <bbk:Obs TIME_PERIOD="2014-10-28" OBS_VALUE="0.84195" BBK_DIFF_A="-0.68621"/>
      <bbk:Obs TIME_PERIOD="2014-10-27" OBS_VALUE="1.52816" BBK_DIFF_A="0.17161"/>
      <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="1.35655" BBK_DIFF_A="0.18269"/>
      <bbk:Obs TIME_PERIOD="2014-10-23" OBS_VALUE="1.17386" BBK_DIFF_A="0.04909"/>
      <bbk:Obs TIME_PERIOD="2014-10-22" OBS_VALUE="1.12477" BBK_DIFF_A="0.37414"/>
      <bbk:Obs TIME_PERIOD="2014-10-21" OBS_VALUE="0.75063" BBK_DIFF_A="-0.05091"/>
      <bbk:Obs TIME_PERIOD="2014-10-20" OBS_VALUE="0.80154" BBK_DIFF_A="-0.86113"/>
      <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="1.66267" BBK_DIFF_A="0.59953"/>
      <bbk:Obs TIME_PERIOD="2014-10-16" OBS_VALUE="1.06314" BBK_DIFF_A="0.28593"/>
      <bbk:Obs TIME_PERIOD="2014-10-15" OBS_VALUE="0.77721" BBK_DIFF_A="-0.39159"/>
      <bbk:Obs TIME_PERIOD="2014-10-14" OBS_VALUE="1.1688" BBK_DIFF_A="0.64221"/>
      <bbk:Obs TIME_PERIOD="2014-10-13" OBS_VALUE="0.52659" BBK_DIFF_A="-0.27464"/>
      <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="0.80123" BBK_DIFF_A="-0.09887"/>
      <bbk:Obs TIME_PERIOD="2014-10-09" OBS_VALUE="0.9001" BBK_DIFF_A="-0.28271"/>
      <bbk:Obs TIME_PERIOD="2014-10-08" OBS_VALUE="1.18281" BBK_DIFF_A="2.55885"/>
      <bbk:Obs TIME_PERIOD="2014-10-07" OBS_VALUE="-1.37604" BBK_DIFF_A="-0.29503"/>
      <bbk:Obs TIME_PERIOD="2014-10-06" OBS_VALUE="-1.08101" BBK_DIFF_A="0.06988"/>
      <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="-1.15089" BBK_DIFF_A="0.25781"/>
      <bbk:Obs TIME_PERIOD="2014-10-01" OBS_VALUE="-1.4087" BBK_DIFF_A="0.03472"/>
      <bbk:Obs TIME_PERIOD="2014-09-30" OBS_VALUE="-1.44342" BBK_DIFF_A="-0.06429"/>
      <bbk:Obs TIME_PERIOD="2014-09-29" OBS_VALUE="-1.37913" BBK_DIFF_A="0.05358"/>
      <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="-1.43271" BBK_DIFF_A="0.16789"/>
      <bbk:Obs TIME_PERIOD="2014-09-25" OBS_VALUE="-1.6006" BBK_DIFF_A="-0.59775"/>
      <bbk:Obs TIME_PERIOD="2014-09-24" OBS_VALUE="-1.00285" BBK_DIFF_A="0.37389"/>
      <bbk:Obs TIME_PERIOD="2014-09-23" OBS_VALUE="-1.37674" BBK_DIFF_A="0.13178"/>
      <bbk:Obs TIME_PERIOD="2014-09-22" OBS_VALUE="-1.50852" BBK_DIFF_A="0.13124"/>
      <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="-1.63976" BBK_DIFF_A="0.24862"/>
      <bbk:Obs TIME_PERIOD="2014-09-18" OBS_VALUE="-1.88838" BBK_DIFF_A="0.07471"/>
      <bbk:Obs TIME_PERIOD="2014-09-17" OBS_VALUE="-1.96309" BBK_DIFF_A="0.20459"/>
      <bbk:Obs TIME_PERIOD="2014-09-16" OBS_VALUE="-2.16768" BBK_DIFF_A="0.53869"/>
      <bbk:Obs TIME_PERIOD="2014-09-15" OBS_VALUE="-2.70637" BBK_DIFF_A="-0.27416"/>
      <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="-2.43221" BBK_DIFF_A="-0.31658"/>
      <bbk:Obs TIME_PERIOD="2014-09-11" OBS_VALUE="-2.11563" BBK_DIFF_A="-4.38677"/>
      <bbk:Obs TIME_PERIOD="2014-09-10" OBS_VALUE="2.27114" BBK_DIFF_A="0.36325"/>
      <bbk:Obs TIME_PERIOD="2014-09-09" OBS_VALUE="1.90789" BBK_DIFF_A="-13.08344"/>
      <bbk:Obs TIME_PERIOD="2014-09-08" OBS_VALUE="14.99133" BBK_DIFF_A="13.82265"/>
      <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="1.16868" BBK_DIFF_A="-0.00799"/>
      <bbk:Obs TIME_PERIOD="2014-09-04" OBS_VALUE="1.17667" BBK_DIFF_A="-0.02398"/>
      <bbk:Obs TIME_PERIOD="2014-09-03" OBS_VALUE="1.20065" BBK_DIFF_A="0.2924"/>
      <bbk:Obs TIME_PERIOD="2014-09-02" OBS_VALUE="0.90825" BBK_DIFF_A="0.07462"/>
      <bbk:Obs TIME_PERIOD="2014-09-01" OBS_VALUE="0.83363" BBK_DIFF_A="-0.02174"/>
      <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="0.85537" BBK_DIFF_A="0.01482"/>
      <bbk:Obs TIME_PERIOD="2014-08-28" OBS_VALUE="0.84055" BBK_DIFF_A="-0.34188"/>
      <bbk:Obs TIME_PERIOD="2014-08-27" OBS_VALUE="1.18243" BBK_DIFF_A="0.00394"/>
      <bbk:Obs TIME_PERIOD="2014-08-26" OBS_VALUE="1.17849" BBK_DIFF_A="-0.25673"/>
      <bbk:Obs TIME_PERIOD="2014-08-25" OBS_VALUE="1.43522" BBK_DIFF_A="-0.05776"/>
      <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="1.49298" BBK_DIFF_A="0.05759"/>
      <bbk:Obs TIME_PERIOD="2014-08-21" OBS_VALUE="1.43539" BBK_DIFF_A="-0.2861"/>
      <bbk:Obs TIME_PERIOD="2014-08-20" OBS_VALUE="1.72149" BBK_DIFF_A="0.15056"/>
      <bbk:Obs TIME_PERIOD="2014-08-19" OBS_VALUE="1.57093" BBK_DIFF_A="0.07959"/>
      <bbk:Obs TIME_PERIOD="2014-08-18" OBS_VALUE="1.49134" BBK_DIFF_A="0.10063"/>
      <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="1.39071" BBK_DIFF_A="0.01448"/>
      <bbk:Obs TIME_PERIOD="2014-08-14" OBS_VALUE="1.37623" BBK_DIFF_A="-0.11212"/>
      <bbk:Obs TIME_PERIOD="2014-08-13" OBS_VALUE="1.48835" BBK_DIFF_A="0.01775"/>
      <bbk:Obs TIME_PERIOD="2014-08-12" OBS_VALUE="1.4706" BBK_DIFF_A="0.05222"/>
      <bbk:Obs TIME_PERIOD="2014-08-11" OBS_VALUE="1.41838" BBK_DIFF_A="0.5934"/>
      <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="0.82498" BBK_DIFF_A="-0.34953"/>
      <bbk:Obs TIME_PERIOD="2014-08-07" OBS_VALUE="1.17451" BBK_DIFF_A="-0.15738"/>
      <bbk:Obs TIME_PERIOD="2014-08-06" OBS_VALUE="1.33189" BBK_DIFF_A="0.33606"/>
      <bbk:Obs TIME_PERIOD="2014-08-05" OBS_VALUE="0.99583" BBK_DIFF_A="0.09979"/>
      <bbk:Obs TIME_PERIOD="2014-08-04" OBS_VALUE="0.89604" BBK_DIFF_A="-0.16588"/>
      <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="1.06192" BBK_DIFF_A="0.11679"/>
      <bbk:Obs TIME_PERIOD="2014-07-31" OBS_VALUE="0.94513" BBK_DIFF_A="-0.83731"/>
      <bbk:Obs TIME_PERIOD="2014-07-30" OBS_VALUE="1.78244" BBK_DIFF_A="-0.07218"/>
      <bbk:Obs TIME_PERIOD="2014-07-29" OBS_VALUE="1.85462" BBK_DIFF_A="-13.62911"/>
      <bbk:Obs TIME_PERIOD="2014-07-28" OBS_VALUE="15.48373" BBK_DIFF_A="14.18164"/>
      <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="1.30209" BBK_DIFF_A="-0.11253"/>
      <bbk:Obs TIME_PERIOD="2014-07-24" OBS_VALUE="1.41462" BBK_DIFF_A="0.25872"/>
      <bbk:Obs TIME_PERIOD="2014-07-23" OBS_VALUE="1.1559" BBK_DIFF_A="-0.06423"/>
      <bbk:Obs TIME_PERIOD="2014-07-22" OBS_VALUE="1.22013" BBK_DIFF_A="-14.10259"/>
      <bbk:Obs TIME_PERIOD="2014-07-21" OBS_VALUE="15.32272" BBK_DIFF_A="5.76983"/>
      <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="9.55289" BBK_DIFF_A="7.49546"/>
      <bbk:Obs TIME_PERIOD="2014-07-17" OBS_VALUE="2.05743" BBK_DIFF_A="-2.18391"/>
      <bbk:Obs TIME_PERIOD="2014-07-16" OBS_VALUE="4.24134" BBK_DIFF_A="2.09978"/>
      <bbk:Obs TIME_PERIOD="2014-07-15" OBS_VALUE="2.14156" BBK_DIFF_A="-9.66118"/>
      <bbk:Obs TIME_PERIOD="2014-07-14" OBS_VALUE="11.80274" BBK_DIFF_A="8.6843"/>
      <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="3.11844" BBK_DIFF_A="-11.96063"/>
      <bbk:Obs TIME_PERIOD="2014-07-10" OBS_VALUE="15.07907" BBK_DIFF_A="0.03476"/>
      <bbk:Obs TIME_PERIOD="2014-07-09" OBS_VALUE="15.04431" BBK_DIFF_A="13.05746"/>
      <bbk:Obs TIME_PERIOD="2014-07-08" OBS_VALUE="1.98685" BBK_DIFF_A="0.63174"/>
      <bbk:Obs TIME_PERIOD="2014-07-07" OBS_VALUE="1.35511" BBK_DIFF_A="-13.63869"/>
      <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="14.9938" BBK_DIFF_A="-0.01085"/>
      <bbk:Obs TIME_PERIOD="2014-07-03" OBS_VALUE="15.00465" BBK_DIFF_A="0.0866"/>
      <bbk:Obs TIME_PERIOD="2014-07-02" OBS_VALUE="14.91805" BBK_DIFF_A="-0.01804"/>
      <bbk:Obs TIME_PERIOD="2014-07-01" OBS_VALUE="14.93609" BBK_DIFF_A="13.5654"/>
      <bbk:Obs TIME_PERIOD="2014-06-30" OBS_VALUE="1.37069" BBK_DIFF_A="-1.01168"/>
      <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="2.38237" BBK_DIFF_A="-12.43341"/>
      <bbk:Obs TIME_PERIOD="2014-06-26" OBS_VALUE="14.81578" BBK_DIFF_A="-0.14724"/>
      <bbk:Obs TIME_PERIOD="2014-06-25" OBS_VALUE="14.96302" BBK_DIFF_A="-0.01214"/>
      <bbk:Obs TIME_PERIOD="2014-06-24" OBS_VALUE="14.97516" BBK_DIFF_A="0.0721"/>
      <bbk:Obs TIME_PERIOD="2014-06-23" OBS_VALUE="14.90306" BBK_DIFF_A="0.0162"/>
      <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="14.88686" BBK_DIFF_A="0.09391"/>
      <bbk:Obs TIME_PERIOD="2014-06-19" OBS_VALUE="14.79295" BBK_DIFF_A="0.21016"/>
      <bbk:Obs TIME_PERIOD="2014-06-18" OBS_VALUE="14.58279" BBK_DIFF_A="-0.08304"/>
      <bbk:Obs TIME_PERIOD="2014-06-17" OBS_VALUE="14.66583" BBK_DIFF_A="0.08124"/>
      <bbk:Obs TIME_PERIOD="2014-06-16" OBS_VALUE="14.58459" BBK_DIFF_A="-0.06121"/>
      <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="14.6458" BBK_DIFF_A="-0.21979"/>
      <bbk:Obs TIME_PERIOD="2014-06-12" OBS_VALUE="14.86559" BBK_DIFF_A="13.36447"/>
      <bbk:Obs TIME_PERIOD="2014-06-11" OBS_VALUE="1.50112" BBK_DIFF_A="-0.16208"/>
      <bbk:Obs TIME_PERIOD="2014-06-10" OBS_VALUE="1.6632" BBK_DIFF_A="0.24191"/>
      <bbk:Obs TIME_PERIOD="2014-06-09" OBS_VALUE="1.42129" BBK_DIFF_A="-0.09712"/>
      <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="1.51841" BBK_DIFF_A="-0.08478"/>
      <bbk:Obs TIME_PERIOD="2014-06-05" OBS_VALUE="1.60319" BBK_DIFF_A="0.28826"/>
      <bbk:Obs TIME_PERIOD="2014-06-04" OBS_VALUE="1.31493" BBK_DIFF_A="-0.1682"/>
      <bbk:Obs TIME_PERIOD="2014-06-03" OBS_VALUE="1.48313" BBK_DIFF_A="0.04622"/>
      <bbk:Obs TIME_PERIOD="2014-06-02" OBS_VALUE="1.43691" BBK_DIFF_A="-0.12835"/>
      <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="1.56526" BBK_DIFF_A="0.16363"/>
      <bbk:Obs TIME_PERIOD="2014-05-29" OBS_VALUE="1.40163" BBK_DIFF_A="0.93776"/>
      <bbk:Obs TIME_PERIOD="2014-05-28" OBS_VALUE="0.46387" BBK_DIFF_A="-0.00902"/>
      <bbk:Obs TIME_PERIOD="2014-05-27" OBS_VALUE="0.47289" BBK_DIFF_A="-0.01379"/>
      <bbk:Obs TIME_PERIOD="2014-05-26" OBS_VALUE="0.48668" BBK_DIFF_A="0.0216"/>
      <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="0.46508" BBK_DIFF_A="0.07602"/>
      <bbk:Obs TIME_PERIOD="2014-05-22" OBS_VALUE="0.38906" BBK_DIFF_A="0.04407"/>
      <bbk:Obs TIME_PERIOD="2014-05-21" OBS_VALUE="0.34499" BBK_DIFF_A="0.04184"/>
      <bbk:Obs TIME_PERIOD="2014-05-20" OBS_VALUE="0.30315" BBK_DIFF_A="-0.06678"/>
      <bbk:Obs TIME_PERIOD="2014-05-19" OBS_VALUE="0.36993" BBK_DIFF_A="-0.05006"/>
      <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="0.41999" BBK_DIFF_A="-0.54751"/>
      <bbk:Obs TIME_PERIOD="2014-05-15" OBS_VALUE="0.9675" BBK_DIFF_A="-0.50128"/>
      <bbk:Obs TIME_PERIOD="2014-05-14" OBS_VALUE="1.46878" BBK_DIFF_A="-0.00975"/>
      <bbk:Obs TIME_PERIOD="2014-05-13" OBS_VALUE="1.47853" BBK_DIFF_A="-0.06166"/>
      <bbk:Obs TIME_PERIOD="2014-05-12" OBS_VALUE="1.54019" BBK_DIFF_A="0.20471"/>
      <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="1.33548" BBK_DIFF_A="0.12607"/>
      <bbk:Obs TIME_PERIOD="2014-05-08" OBS_VALUE="1.20941" BBK_DIFF_A="-0.35"/>
      <bbk:Obs TIME_PERIOD="2014-05-07" OBS_VALUE="1.55941" BBK_DIFF_A="0.16311"/>
      <bbk:Obs TIME_PERIOD="2014-05-06" OBS_VALUE="1.3963" BBK_DIFF_A="-0.06684"/>
      <bbk:Obs TIME_PERIOD="2014-05-05" OBS_VALUE="1.46314" BBK_DIFF_A="0.0146"/>
      <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="1.44854" BBK_DIFF_A="0.2111"/>
      <bbk:Obs TIME_PERIOD="2014-05-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2014-04-30" OBS_VALUE="1.23744" BBK_DIFF_A="0.31568"/>
      <bbk:Obs TIME_PERIOD="2014-04-29" OBS_VALUE="0.92176" BBK_DIFF_A="-0.32375"/>
      <bbk:Obs TIME_PERIOD="2014-04-28" OBS_VALUE="1.24551" BBK_DIFF_A="0.0254"/>
      <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="1.22011" BBK_DIFF_A="-0.0218"/>
      <bbk:Obs TIME_PERIOD="2014-04-24" OBS_VALUE="1.24191" BBK_DIFF_A="0.21713"/>
      <bbk:Obs TIME_PERIOD="2014-04-23" OBS_VALUE="1.02478" BBK_DIFF_A="0.01714"/>
      <bbk:Obs TIME_PERIOD="2014-04-22" OBS_VALUE="1.00764" BBK_DIFF_A="-0.12101"/>
      <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="1.12865" BBK_DIFF_A="0.0761"/>
      <bbk:Obs TIME_PERIOD="2014-04-16" OBS_VALUE="1.05255" BBK_DIFF_A="0.24514"/>
      <bbk:Obs TIME_PERIOD="2014-04-15" OBS_VALUE="0.80741" BBK_DIFF_A="-0.26862"/>
      <bbk:Obs TIME_PERIOD="2014-04-14" OBS_VALUE="1.07603" BBK_DIFF_A="-0.00944"/>
      <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="1.08547" BBK_DIFF_A="0.14746"/>
      <bbk:Obs TIME_PERIOD="2014-04-10" OBS_VALUE="0.93801" BBK_DIFF_A="0.15389"/>
      <bbk:Obs TIME_PERIOD="2014-04-09" OBS_VALUE="0.78412" BBK_DIFF_A="0.03727"/>
      <bbk:Obs TIME_PERIOD="2014-04-08" OBS_VALUE="0.74685" BBK_DIFF_A="0.03149"/>
      <bbk:Obs TIME_PERIOD="2014-04-07" OBS_VALUE="0.71536" BBK_DIFF_A="-0.59295"/>
      <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="1.30831" BBK_DIFF_A="0.09491"/>
      <bbk:Obs TIME_PERIOD="2014-04-03" OBS_VALUE="1.2134" BBK_DIFF_A="0.00481"/>
      <bbk:Obs TIME_PERIOD="2014-04-02" OBS_VALUE="1.20859" BBK_DIFF_A="-0.15276"/>
      <bbk:Obs TIME_PERIOD="2014-04-01" OBS_VALUE="1.36135" BBK_DIFF_A="0.2601"/>
      <bbk:Obs TIME_PERIOD="2014-03-31" OBS_VALUE="1.10125" BBK_DIFF_A="0.03483"/>
      <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="1.06642" BBK_DIFF_A="-0.40922"/>
      <bbk:Obs TIME_PERIOD="2014-03-27" OBS_VALUE="1.47564" BBK_DIFF_A="0.4347"/>
      <bbk:Obs TIME_PERIOD="2014-03-26" OBS_VALUE="1.04094" BBK_DIFF_A="-0.07907"/>
      <bbk:Obs TIME_PERIOD="2014-03-25" OBS_VALUE="1.12001" BBK_DIFF_A="0.06335"/>
      <bbk:Obs TIME_PERIOD="2014-03-24" OBS_VALUE="1.05666" BBK_DIFF_A="0.09389"/>
      <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="0.96277" BBK_DIFF_A="0.17054"/>
      <bbk:Obs TIME_PERIOD="2014-03-20" OBS_VALUE="0.79223" BBK_DIFF_A="-0.17628"/>
      <bbk:Obs TIME_PERIOD="2014-03-19" OBS_VALUE="0.96851" BBK_DIFF_A="-0.02188"/>
      <bbk:Obs TIME_PERIOD="2014-03-18" OBS_VALUE="0.99039" BBK_DIFF_A="0.0614"/>
      <bbk:Obs TIME_PERIOD="2014-03-17" OBS_VALUE="0.92899" BBK_DIFF_A="0.13293"/>
      <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="0.79606" BBK_DIFF_A="0.13074"/>
      <bbk:Obs TIME_PERIOD="2014-03-13" OBS_VALUE="0.66532" BBK_DIFF_A="-0.26339"/>
      <bbk:Obs TIME_PERIOD="2014-03-12" OBS_VALUE="0.92871" BBK_DIFF_A="-0.01054"/>
      <bbk:Obs TIME_PERIOD="2014-03-11" OBS_VALUE="0.93925" BBK_DIFF_A="-1.77421"/>
      <bbk:Obs TIME_PERIOD="2014-03-10" OBS_VALUE="2.71346" BBK_DIFF_A="-0.2314"/>
      <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="2.94486" BBK_DIFF_A="0.14582"/>
      <bbk:Obs TIME_PERIOD="2014-03-06" OBS_VALUE="2.79904" BBK_DIFF_A="-0.07157"/>
      <bbk:Obs TIME_PERIOD="2014-03-05" OBS_VALUE="2.87061" BBK_DIFF_A="-0.31851"/>
      <bbk:Obs TIME_PERIOD="2014-03-04" OBS_VALUE="3.18912" BBK_DIFF_A="0.12283"/>
      <bbk:Obs TIME_PERIOD="2014-03-03" OBS_VALUE="3.06629" BBK_DIFF_A="1.25202"/>
      <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="1.81427" BBK_DIFF_A="6.91698"/>
      <bbk:Obs TIME_PERIOD="2014-02-27" OBS_VALUE="-5.10271" BBK_DIFF_A="0.5897"/>
      <bbk:Obs TIME_PERIOD="2014-02-26" OBS_VALUE="-5.69241" BBK_DIFF_A="-0.28726"/>
      <bbk:Obs TIME_PERIOD="2014-02-25" OBS_VALUE="-5.40515" BBK_DIFF_A="1.37012"/>
      <bbk:Obs TIME_PERIOD="2014-02-24" OBS_VALUE="-6.77527" BBK_DIFF_A="-0.74433"/>
      <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="-6.03094" BBK_DIFF_A="-0.03315"/>
      <bbk:Obs TIME_PERIOD="2014-02-20" OBS_VALUE="-5.99779" BBK_DIFF_A="-0.17797"/>
      <bbk:Obs TIME_PERIOD="2014-02-19" OBS_VALUE="-5.81982" BBK_DIFF_A="-1.5962"/>
      <bbk:Obs TIME_PERIOD="2014-02-18" OBS_VALUE="-4.22362" BBK_DIFF_A="-0.29792"/>
      <bbk:Obs TIME_PERIOD="2014-02-17" OBS_VALUE="-3.9257" BBK_DIFF_A="-0.01362"/>
      <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="-3.91208" BBK_DIFF_A="0.2799"/>
      <bbk:Obs TIME_PERIOD="2014-02-13" OBS_VALUE="-4.19198" BBK_DIFF_A="-0.21741"/>
      <bbk:Obs TIME_PERIOD="2014-02-12" OBS_VALUE="-3.97457" BBK_DIFF_A="1.83432"/>
      <bbk:Obs TIME_PERIOD="2014-02-11" OBS_VALUE="-5.80889" BBK_DIFF_A="-0.40331"/>
      <bbk:Obs TIME_PERIOD="2014-02-10" OBS_VALUE="-5.40558" BBK_DIFF_A="-0.54036"/>
      <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="-4.86522" BBK_DIFF_A="0.7308"/>
      <bbk:Obs TIME_PERIOD="2014-02-06" OBS_VALUE="-5.59602" BBK_DIFF_A="0.23261"/>
      <bbk:Obs TIME_PERIOD="2014-02-05" OBS_VALUE="-5.82863" BBK_DIFF_A="-0.1961"/>
      <bbk:Obs TIME_PERIOD="2014-02-04" OBS_VALUE="-5.63253" BBK_DIFF_A="-0.18586"/>
      <bbk:Obs TIME_PERIOD="2014-02-03" OBS_VALUE="-5.44667" BBK_DIFF_A="-0.27964"/>
      <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="-5.16703" BBK_DIFF_A="-3.4084"/>
      <bbk:Obs TIME_PERIOD="2014-01-30" OBS_VALUE="-1.75863" BBK_DIFF_A="-0.04763"/>
      <bbk:Obs TIME_PERIOD="2014-01-29" OBS_VALUE="-1.711" BBK_DIFF_A="0.06345"/>
      <bbk:Obs TIME_PERIOD="2014-01-28" OBS_VALUE="-1.77445" BBK_DIFF_A="-0.02548"/>
      <bbk:Obs TIME_PERIOD="2014-01-27" OBS_VALUE="-1.74897" BBK_DIFF_A="0.13226"/>
      <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="-1.88123" BBK_DIFF_A="0.26876"/>
      <bbk:Obs TIME_PERIOD="2014-01-23" OBS_VALUE="-2.14999" BBK_DIFF_A="-0.16798"/>
      <bbk:Obs TIME_PERIOD="2014-01-22" OBS_VALUE="-1.98201" BBK_DIFF_A="0.07607"/>
      <bbk:Obs TIME_PERIOD="2014-01-21" OBS_VALUE="-2.05808" BBK_DIFF_A="0.17041"/>
      <bbk:Obs TIME_PERIOD="2014-01-20" OBS_VALUE="-2.22849" BBK_DIFF_A="-0.32363"/>
      <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="-1.90486" BBK_DIFF_A="-3.01115"/>
      <bbk:Obs TIME_PERIOD="2014-01-16" OBS_VALUE="1.10629" BBK_DIFF_A="-0.24278"/>
      <bbk:Obs TIME_PERIOD="2014-01-15" OBS_VALUE="1.34907" BBK_DIFF_A="-0.09312"/>
      <bbk:Obs TIME_PERIOD="2014-01-14" OBS_VALUE="1.44219" BBK_DIFF_A="0.04439"/>
      <bbk:Obs TIME_PERIOD="2014-01-13" OBS_VALUE="1.3978" BBK_DIFF_A="-0.07761"/>
      <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="1.47541" BBK_DIFF_A="-0.36002"/>
      <bbk:Obs TIME_PERIOD="2014-01-09" OBS_VALUE="1.83543" BBK_DIFF_A="0.02679"/>
      <bbk:Obs TIME_PERIOD="2014-01-08" OBS_VALUE="1.80864" BBK_DIFF_A="-0.15237"/>
      <bbk:Obs TIME_PERIOD="2014-01-07" OBS_VALUE="1.96101" BBK_DIFF_A="0.03711"/>
      <bbk:Obs TIME_PERIOD="2014-01-06" OBS_VALUE="1.9239" BBK_DIFF_A="-0.39797"/>
      <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="2.32187" BBK_DIFF_A="0.11351"/>
      <bbk:Obs TIME_PERIOD="2014-01-02" OBS_VALUE="2.20836" BBK_DIFF_A="-0.94343"/>
      <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="3.15179" BBK_DIFF_A="0.1698"/>
      <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="2.98199" BBK_DIFF_A="1.55377"/>
      <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="1.42822" BBK_DIFF_A="-0.84813"/>
      <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="2.27635" BBK_DIFF_A="0.48924"/>
      <bbk:Obs TIME_PERIOD="2013-12-19" OBS_VALUE="1.78711" BBK_DIFF_A="0.28153"/>
      <bbk:Obs TIME_PERIOD="2013-12-18" OBS_VALUE="1.50558" BBK_DIFF_A="-0.10895"/>
      <bbk:Obs TIME_PERIOD="2013-12-17" OBS_VALUE="1.61453" BBK_DIFF_A="-0.10148"/>
      <bbk:Obs TIME_PERIOD="2013-12-16" OBS_VALUE="1.71601" BBK_DIFF_A="0.08353"/>
      <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="1.63248" BBK_DIFF_A="-0.50129"/>
      <bbk:Obs TIME_PERIOD="2013-12-12" OBS_VALUE="2.13377" BBK_DIFF_A="0.28581"/>
      <bbk:Obs TIME_PERIOD="2013-12-11" OBS_VALUE="1.84796" BBK_DIFF_A="-0.33392"/>
      <bbk:Obs TIME_PERIOD="2013-12-10" OBS_VALUE="2.18188" BBK_DIFF_A="0.04245"/>
      <bbk:Obs TIME_PERIOD="2013-12-09" OBS_VALUE="2.13943" BBK_DIFF_A="0.62933"/>
      <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="1.5101" BBK_DIFF_A="-0.01231"/>
      <bbk:Obs TIME_PERIOD="2013-12-05" OBS_VALUE="1.52241" BBK_DIFF_A="0.12546"/>
      <bbk:Obs TIME_PERIOD="2013-12-04" OBS_VALUE="1.39695" BBK_DIFF_A="0.24492"/>
      <bbk:Obs TIME_PERIOD="2013-12-03" OBS_VALUE="1.15203" BBK_DIFF_A="-0.42351"/>
      <bbk:Obs TIME_PERIOD="2013-12-02" OBS_VALUE="1.57554" BBK_DIFF_A="0.19255"/>
      <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="1.38299" BBK_DIFF_A="-0.11956"/>
      <bbk:Obs TIME_PERIOD="2013-11-28" OBS_VALUE="1.50255" BBK_DIFF_A="-0.48465"/>
      <bbk:Obs TIME_PERIOD="2013-11-27" OBS_VALUE="1.9872" BBK_DIFF_A="-0.12806"/>
      <bbk:Obs TIME_PERIOD="2013-11-26" OBS_VALUE="2.11526" BBK_DIFF_A="-0.0353"/>
      <bbk:Obs TIME_PERIOD="2013-11-25" OBS_VALUE="2.15056" BBK_DIFF_A="0.65208"/>
      <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="1.49848" BBK_DIFF_A="0.20785"/>
      <bbk:Obs TIME_PERIOD="2013-11-21" OBS_VALUE="1.29063" BBK_DIFF_A="0.61173"/>
      <bbk:Obs TIME_PERIOD="2013-11-20" OBS_VALUE="0.6789" BBK_DIFF_A="-0.58256"/>
      <bbk:Obs TIME_PERIOD="2013-11-19" OBS_VALUE="1.26146" BBK_DIFF_A="-0.24643"/>
      <bbk:Obs TIME_PERIOD="2013-11-18" OBS_VALUE="1.50789" BBK_DIFF_A="0.07044"/>
      <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="1.43745" BBK_DIFF_A="-0.51797"/>
      <bbk:Obs TIME_PERIOD="2013-11-14" OBS_VALUE="1.95542" BBK_DIFF_A="-0.10274"/>
      <bbk:Obs TIME_PERIOD="2013-11-13" OBS_VALUE="2.05816" BBK_DIFF_A="0.51847"/>
      <bbk:Obs TIME_PERIOD="2013-11-12" OBS_VALUE="1.53969" BBK_DIFF_A="0.02539"/>
      <bbk:Obs TIME_PERIOD="2013-11-11" OBS_VALUE="1.5143" BBK_DIFF_A="4.68833"/>
      <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="-3.17403" BBK_DIFF_A="0.87409"/>
      <bbk:Obs TIME_PERIOD="2013-11-07" OBS_VALUE="-4.04812" BBK_DIFF_A="4.75046"/>
      <bbk:Obs TIME_PERIOD="2013-11-06" OBS_VALUE="-8.79858" BBK_DIFF_A="0.219"/>
      <bbk:Obs TIME_PERIOD="2013-11-05" OBS_VALUE="-9.01758" BBK_DIFF_A="10.5969"/>
      <bbk:Obs TIME_PERIOD="2013-11-04" OBS_VALUE="-19.61448" BBK_DIFF_A="-11.84216"/>
      <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="-7.77232" BBK_DIFF_A="-7.11179"/>
      <bbk:Obs TIME_PERIOD="2013-10-31" OBS_VALUE="-0.66053" BBK_DIFF_A="0.09698"/>
      <bbk:Obs TIME_PERIOD="2013-10-30" OBS_VALUE="-0.75751" BBK_DIFF_A="-3.13044"/>
      <bbk:Obs TIME_PERIOD="2013-10-29" OBS_VALUE="2.37293" BBK_DIFF_A="0.87105"/>
      <bbk:Obs TIME_PERIOD="2013-10-28" OBS_VALUE="1.50188" BBK_DIFF_A="-0.10408"/>
      <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="1.60596" BBK_DIFF_A="-0.43266"/>
      <bbk:Obs TIME_PERIOD="2013-10-24" OBS_VALUE="2.03862" BBK_DIFF_A="-0.62182"/>
      <bbk:Obs TIME_PERIOD="2013-10-23" OBS_VALUE="2.66044" BBK_DIFF_A="0.56039"/>
      <bbk:Obs TIME_PERIOD="2013-10-22" OBS_VALUE="2.10005" BBK_DIFF_A="-0.02387"/>
      <bbk:Obs TIME_PERIOD="2013-10-21" OBS_VALUE="2.12392" BBK_DIFF_A="-1.08805"/>
      <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="3.21197" BBK_DIFF_A="0.32243"/>
      <bbk:Obs TIME_PERIOD="2013-10-17" OBS_VALUE="2.88954" BBK_DIFF_A="1.05032"/>
      <bbk:Obs TIME_PERIOD="2013-10-16" OBS_VALUE="1.83922" BBK_DIFF_A="8.68368"/>
      <bbk:Obs TIME_PERIOD="2013-10-15" OBS_VALUE="-6.84446" BBK_DIFF_A="-0.70622"/>
      <bbk:Obs TIME_PERIOD="2013-10-14" OBS_VALUE="-6.13824" BBK_DIFF_A="2.48129"/>
      <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="-8.61953" BBK_DIFF_A="-2.20898"/>
      <bbk:Obs TIME_PERIOD="2013-10-10" OBS_VALUE="-6.41055" BBK_DIFF_A="0.47987"/>
      <bbk:Obs TIME_PERIOD="2013-10-09" OBS_VALUE="-6.89042" BBK_DIFF_A="0.14132"/>
      <bbk:Obs TIME_PERIOD="2013-10-08" OBS_VALUE="-7.03174" BBK_DIFF_A="-0.16598"/>
      <bbk:Obs TIME_PERIOD="2013-10-07" OBS_VALUE="-6.86576" BBK_DIFF_A="0.13251"/>
      <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="-6.99827" BBK_DIFF_A="0.32979"/>
      <bbk:Obs TIME_PERIOD="2013-10-03" OBS_VALUE="-7.32806" BBK_DIFF_A="-1.03801"/>
      <bbk:Obs TIME_PERIOD="2013-10-02" OBS_VALUE="-6.29005" BBK_DIFF_A="-0.58819"/>
      <bbk:Obs TIME_PERIOD="2013-10-01" OBS_VALUE="-5.70186" BBK_DIFF_A="-1.93849"/>
      <bbk:Obs TIME_PERIOD="2013-09-30" OBS_VALUE="-3.76337" BBK_DIFF_A="1.58362"/>
      <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="-5.34699" BBK_DIFF_A="-1.38927"/>
      <bbk:Obs TIME_PERIOD="2013-09-26" OBS_VALUE="-3.95772" BBK_DIFF_A="0.07023"/>
      <bbk:Obs TIME_PERIOD="2013-09-25" OBS_VALUE="-4.02795" BBK_DIFF_A="3.75146"/>
      <bbk:Obs TIME_PERIOD="2013-09-24" OBS_VALUE="-7.77941" BBK_DIFF_A="-0.9995"/>
      <bbk:Obs TIME_PERIOD="2013-09-23" OBS_VALUE="-6.77991" BBK_DIFF_A="0.4832"/>
      <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="-7.26311" BBK_DIFF_A="-0.16502"/>
      <bbk:Obs TIME_PERIOD="2013-09-19" OBS_VALUE="-7.09809" BBK_DIFF_A="1.01981"/>
      <bbk:Obs TIME_PERIOD="2013-09-18" OBS_VALUE="-8.1179" BBK_DIFF_A="-0.23658"/>
      <bbk:Obs TIME_PERIOD="2013-09-17" OBS_VALUE="-7.88132" BBK_DIFF_A="-2.32188"/>
      <bbk:Obs TIME_PERIOD="2013-09-16" OBS_VALUE="-5.55944" BBK_DIFF_A="1.60637"/>
      <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="-7.16581" BBK_DIFF_A="-0.10857"/>
      <bbk:Obs TIME_PERIOD="2013-09-12" OBS_VALUE="-7.05724" BBK_DIFF_A="1.73402"/>
      <bbk:Obs TIME_PERIOD="2013-09-11" OBS_VALUE="-8.79126" BBK_DIFF_A="-0.18108"/>
      <bbk:Obs TIME_PERIOD="2013-09-10" OBS_VALUE="-8.61018" BBK_DIFF_A="0.22919"/>
      <bbk:Obs TIME_PERIOD="2013-09-09" OBS_VALUE="-8.83937" BBK_DIFF_A="-0.16442"/>
      <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="-8.67495" BBK_DIFF_A="0.05975"/>
      <bbk:Obs TIME_PERIOD="2013-09-05" OBS_VALUE="-8.7347" BBK_DIFF_A="-0.22823"/>
      <bbk:Obs TIME_PERIOD="2013-09-04" OBS_VALUE="-8.50647" BBK_DIFF_A="-0.1211"/>
      <bbk:Obs TIME_PERIOD="2013-09-03" OBS_VALUE="-8.38537" BBK_DIFF_A="-0.23212"/>
      <bbk:Obs TIME_PERIOD="2013-09-02" OBS_VALUE="-8.15325" BBK_DIFF_A="0.41946"/>
      <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="-8.57271" BBK_DIFF_A="0.6336"/>
      <bbk:Obs TIME_PERIOD="2013-08-29" OBS_VALUE="-9.20631" BBK_DIFF_A="0.2387"/>
      <bbk:Obs TIME_PERIOD="2013-08-28" OBS_VALUE="-9.44501" BBK_DIFF_A="0.21831"/>
      <bbk:Obs TIME_PERIOD="2013-08-27" OBS_VALUE="-9.66332" BBK_DIFF_A="-0.68015"/>
      <bbk:Obs TIME_PERIOD="2013-08-26" OBS_VALUE="-8.98317" BBK_DIFF_A="0.0156"/>
      <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="-8.99877" BBK_DIFF_A="-0.01068"/>
      <bbk:Obs TIME_PERIOD="2013-08-22" OBS_VALUE="-8.98809" BBK_DIFF_A="-0.10818"/>
      <bbk:Obs TIME_PERIOD="2013-08-21" OBS_VALUE="-8.87991" BBK_DIFF_A="0.15451"/>
      <bbk:Obs TIME_PERIOD="2013-08-20" OBS_VALUE="-9.03442" BBK_DIFF_A="-0.76992"/>
      <bbk:Obs TIME_PERIOD="2013-08-19" OBS_VALUE="-8.2645" BBK_DIFF_A="0.0186"/>
      <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="-8.2831" BBK_DIFF_A="0.25712"/>
      <bbk:Obs TIME_PERIOD="2013-08-15" OBS_VALUE="-8.54022" BBK_DIFF_A="0.73437"/>
      <bbk:Obs TIME_PERIOD="2013-08-14" OBS_VALUE="-9.27459" BBK_DIFF_A="-0.24204"/>
      <bbk:Obs TIME_PERIOD="2013-08-13" OBS_VALUE="-9.03255" BBK_DIFF_A="0.06468"/>
      <bbk:Obs TIME_PERIOD="2013-08-12" OBS_VALUE="-9.09723" BBK_DIFF_A="-0.36182"/>
      <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="-8.73541" BBK_DIFF_A="-0.07746"/>
      <bbk:Obs TIME_PERIOD="2013-08-08" OBS_VALUE="-8.65795" BBK_DIFF_A="0.75359"/>
      <bbk:Obs TIME_PERIOD="2013-08-07" OBS_VALUE="-9.41154" BBK_DIFF_A="0.17013"/>
      <bbk:Obs TIME_PERIOD="2013-08-06" OBS_VALUE="-9.58167" BBK_DIFF_A="-0.20112"/>
      <bbk:Obs TIME_PERIOD="2013-08-05" OBS_VALUE="-9.38055" BBK_DIFF_A="-1.01916"/>
      <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="-8.36139" BBK_DIFF_A="-0.1004"/>
      <bbk:Obs TIME_PERIOD="2013-08-01" OBS_VALUE="-8.26099" BBK_DIFF_A="-0.08485"/>
      <bbk:Obs TIME_PERIOD="2013-07-31" OBS_VALUE="-8.17614" BBK_DIFF_A="0.52266"/>
      <bbk:Obs TIME_PERIOD="2013-07-30" OBS_VALUE="-8.6988" BBK_DIFF_A="0.41933"/>
      <bbk:Obs TIME_PERIOD="2013-07-29" OBS_VALUE="-9.11813" BBK_DIFF_A="0.02799"/>
      <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="-9.14612" BBK_DIFF_A="0.12131"/>
      <bbk:Obs TIME_PERIOD="2013-07-25" OBS_VALUE="-9.26743" BBK_DIFF_A="0.44864"/>
      <bbk:Obs TIME_PERIOD="2013-07-24" OBS_VALUE="-9.71607" BBK_DIFF_A="0.24808"/>
      <bbk:Obs TIME_PERIOD="2013-07-23" OBS_VALUE="-9.96415" BBK_DIFF_A="-1.33191"/>
      <bbk:Obs TIME_PERIOD="2013-07-22" OBS_VALUE="-8.63224" BBK_DIFF_A="0.01551"/>
      <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="-8.64775" BBK_DIFF_A="-1.6747"/>
      <bbk:Obs TIME_PERIOD="2013-07-18" OBS_VALUE="-6.97305" BBK_DIFF_A="-1.04054"/>
      <bbk:Obs TIME_PERIOD="2013-07-17" OBS_VALUE="-5.93251" BBK_DIFF_A="1.78438"/>
      <bbk:Obs TIME_PERIOD="2013-07-16" OBS_VALUE="-7.71689" BBK_DIFF_A="-0.72826"/>
      <bbk:Obs TIME_PERIOD="2013-07-15" OBS_VALUE="-6.98863" BBK_DIFF_A="-1.20348"/>
      <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="-5.78515" BBK_DIFF_A="-0.60244"/>
      <bbk:Obs TIME_PERIOD="2013-07-11" OBS_VALUE="-5.18271" BBK_DIFF_A="0.17579"/>
      <bbk:Obs TIME_PERIOD="2013-07-10" OBS_VALUE="-5.3585" BBK_DIFF_A="2.58079"/>
      <bbk:Obs TIME_PERIOD="2013-07-09" OBS_VALUE="-7.93929" BBK_DIFF_A="-0.18123"/>
      <bbk:Obs TIME_PERIOD="2013-07-08" OBS_VALUE="-7.75806" BBK_DIFF_A="0.52493"/>
      <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="-8.28299" BBK_DIFF_A="1.47434"/>
      <bbk:Obs TIME_PERIOD="2013-07-04" OBS_VALUE="-9.75733" BBK_DIFF_A="0.66997"/>
      <bbk:Obs TIME_PERIOD="2013-07-03" OBS_VALUE="-10.4273" BBK_DIFF_A="-0.15581"/>
      <bbk:Obs TIME_PERIOD="2013-07-02" OBS_VALUE="-10.27149" BBK_DIFF_A="-0.16086"/>
      <bbk:Obs TIME_PERIOD="2013-07-01" OBS_VALUE="-10.11063" BBK_DIFF_A="-0.46906"/>
      <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="-9.64157" BBK_DIFF_A="0.2566"/>
      <bbk:Obs TIME_PERIOD="2013-06-27" OBS_VALUE="-9.89817" BBK_DIFF_A="0.58801"/>
      <bbk:Obs TIME_PERIOD="2013-06-26" OBS_VALUE="-10.48618" BBK_DIFF_A="0.36461"/>
      <bbk:Obs TIME_PERIOD="2013-06-25" OBS_VALUE="-10.85079" BBK_DIFF_A="0.21244"/>
      <bbk:Obs TIME_PERIOD="2013-06-24" OBS_VALUE="-11.06323" BBK_DIFF_A="0.1218"/>
      <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="-11.18503" BBK_DIFF_A="0.29838"/>
      <bbk:Obs TIME_PERIOD="2013-06-20" OBS_VALUE="-11.48341" BBK_DIFF_A="-0.04739"/>
      <bbk:Obs TIME_PERIOD="2013-06-19" OBS_VALUE="-11.43602" BBK_DIFF_A="-0.14523"/>
      <bbk:Obs TIME_PERIOD="2013-06-18" OBS_VALUE="-11.29079" BBK_DIFF_A="-0.08456"/>
      <bbk:Obs TIME_PERIOD="2013-06-17" OBS_VALUE="-11.20623" BBK_DIFF_A="-0.17974"/>
      <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="-11.02649" BBK_DIFF_A="0.23277"/>
      <bbk:Obs TIME_PERIOD="2013-06-13" OBS_VALUE="-11.25926" BBK_DIFF_A="-0.02588"/>
      <bbk:Obs TIME_PERIOD="2013-06-12" OBS_VALUE="-11.23338" BBK_DIFF_A="0.44813"/>
      <bbk:Obs TIME_PERIOD="2013-06-11" OBS_VALUE="-11.68151" BBK_DIFF_A="-0.57129"/>
      <bbk:Obs TIME_PERIOD="2013-06-10" OBS_VALUE="-11.11022" BBK_DIFF_A="1.23687"/>
      <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="-12.34709" BBK_DIFF_A="-0.50625"/>
      <bbk:Obs TIME_PERIOD="2013-06-06" OBS_VALUE="-11.84084" BBK_DIFF_A="-0.117"/>
      <bbk:Obs TIME_PERIOD="2013-06-05" OBS_VALUE="-11.72384" BBK_DIFF_A="-0.12683"/>
      <bbk:Obs TIME_PERIOD="2013-06-04" OBS_VALUE="-11.59701" BBK_DIFF_A="0.14984"/>
      <bbk:Obs TIME_PERIOD="2013-06-03" OBS_VALUE="-11.74685" BBK_DIFF_A="-24.41413"/>
      <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="12.66728" BBK_DIFF_A="-7.33272"/>
      <bbk:Obs TIME_PERIOD="2013-05-30" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2013-05-29" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2013-05-28" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2013-05-27" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <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="20.0" BBK_DIFF_A="0.73675"/>
      <bbk:Obs TIME_PERIOD="2013-05-23" OBS_VALUE="19.26325" BBK_DIFF_A="8.018"/>
      <bbk:Obs TIME_PERIOD="2013-05-22" OBS_VALUE="11.24525" BBK_DIFF_A="9.83447"/>
      <bbk:Obs TIME_PERIOD="2013-05-21" OBS_VALUE="1.41078" BBK_DIFF_A="0.01077"/>
      <bbk:Obs TIME_PERIOD="2013-05-20" OBS_VALUE="1.40001" BBK_DIFF_A="-0.00438"/>
      <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="1.40439" BBK_DIFF_A="0.0017"/>
      <bbk:Obs TIME_PERIOD="2013-05-16" OBS_VALUE="1.40269" BBK_DIFF_A="13.3738"/>
      <bbk:Obs TIME_PERIOD="2013-05-15" OBS_VALUE="-11.97111" BBK_DIFF_A="0.06681"/>
      <bbk:Obs TIME_PERIOD="2013-05-14" OBS_VALUE="-12.03792" BBK_DIFF_A="0.29507"/>
      <bbk:Obs TIME_PERIOD="2013-05-13" OBS_VALUE="-12.33299" BBK_DIFF_A="0.07768"/>
      <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="-12.41067" BBK_DIFF_A="0.03078"/>
      <bbk:Obs TIME_PERIOD="2013-05-09" OBS_VALUE="-12.44145" BBK_DIFF_A="-0.27536"/>
      <bbk:Obs TIME_PERIOD="2013-05-08" OBS_VALUE="-12.16609" BBK_DIFF_A="-0.02093"/>
      <bbk:Obs TIME_PERIOD="2013-05-07" OBS_VALUE="-12.14516" BBK_DIFF_A="0.10142"/>
      <bbk:Obs TIME_PERIOD="2013-05-06" OBS_VALUE="-12.24658" BBK_DIFF_A="0.48549"/>
      <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="-12.73207" BBK_DIFF_A="-0.30946"/>
      <bbk:Obs TIME_PERIOD="2013-05-02" OBS_VALUE="-12.42261" BBK_DIFF_A="-6.66287"/>
      <bbk:Obs TIME_PERIOD="2013-05-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2013-04-30" OBS_VALUE="-5.75974" BBK_DIFF_A="-1.2041"/>
      <bbk:Obs TIME_PERIOD="2013-04-29" OBS_VALUE="-4.55564" BBK_DIFF_A="-24.55564"/>
      <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="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2013-04-25" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2013-04-24" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2013-04-23" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2013-04-22" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <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="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2013-04-18" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2013-04-17" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2013-04-16" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2013-04-15" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <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="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2013-04-11" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2013-04-10" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2013-04-09" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2013-04-08" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <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="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2013-04-04" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2013-04-03" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2013-04-02" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <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="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2013-03-27" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2013-03-26" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2013-03-25" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <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="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2013-03-21" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2013-03-20" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2013-03-19" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2013-03-18" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <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="20.0" BBK_DIFF_A="9.43946"/>
      <bbk:Obs TIME_PERIOD="2013-03-14" OBS_VALUE="10.56054" BBK_DIFF_A="-0.07768"/>
      <bbk:Obs TIME_PERIOD="2013-03-13" OBS_VALUE="10.63822" BBK_DIFF_A="-0.06039"/>
      <bbk:Obs TIME_PERIOD="2013-03-12" OBS_VALUE="10.69861" BBK_DIFF_A="0.00136"/>
      <bbk:Obs TIME_PERIOD="2013-03-11" OBS_VALUE="10.69725" BBK_DIFF_A="0.03323"/>
      <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="10.66402" BBK_DIFF_A="9.82212"/>
      <bbk:Obs TIME_PERIOD="2013-03-07" OBS_VALUE="0.8419" BBK_DIFF_A="-3.40855"/>
      <bbk:Obs TIME_PERIOD="2013-03-06" OBS_VALUE="4.25045" BBK_DIFF_A="0.06077"/>
      <bbk:Obs TIME_PERIOD="2013-03-05" OBS_VALUE="4.18968" BBK_DIFF_A="-0.14365"/>
      <bbk:Obs TIME_PERIOD="2013-03-04" OBS_VALUE="4.33333" BBK_DIFF_A="0.42339"/>
      <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="3.90994" BBK_DIFF_A="-0.12908"/>
      <bbk:Obs TIME_PERIOD="2013-02-28" OBS_VALUE="4.03902" BBK_DIFF_A="19.63335"/>
      <bbk:Obs TIME_PERIOD="2013-02-27" OBS_VALUE="-15.59433" BBK_DIFF_A="-1.94279"/>
      <bbk:Obs TIME_PERIOD="2013-02-26" OBS_VALUE="-13.65154" BBK_DIFF_A="-4.11178"/>
      <bbk:Obs TIME_PERIOD="2013-02-25" OBS_VALUE="-9.53976" BBK_DIFF_A="-0.05531"/>
      <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="-9.48445" BBK_DIFF_A="0.89321"/>
      <bbk:Obs TIME_PERIOD="2013-02-21" OBS_VALUE="-10.37766" BBK_DIFF_A="-30.37766"/>
      <bbk:Obs TIME_PERIOD="2013-02-20" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2013-02-19" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2013-02-18" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <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="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2013-02-14" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2013-02-13" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2013-02-12" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2013-02-11" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <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="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2013-02-07" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2013-02-06" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2013-02-05" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2013-02-04" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <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="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2013-01-31" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2013-01-30" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2013-01-29" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2013-01-28" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <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="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2013-01-24" OBS_VALUE="20.0" BBK_DIFF_A="34.71215"/>
      <bbk:Obs TIME_PERIOD="2013-01-23" OBS_VALUE="-14.71215" BBK_DIFF_A="-2.82287"/>
      <bbk:Obs TIME_PERIOD="2013-01-22" OBS_VALUE="-11.88928" BBK_DIFF_A="1.09576"/>
      <bbk:Obs TIME_PERIOD="2013-01-21" OBS_VALUE="-12.98504" BBK_DIFF_A="0.55276"/>
      <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="-13.5378" BBK_DIFF_A="-0.78664"/>
      <bbk:Obs TIME_PERIOD="2013-01-17" OBS_VALUE="-12.75116" BBK_DIFF_A="-0.11509"/>
      <bbk:Obs TIME_PERIOD="2013-01-16" OBS_VALUE="-12.63607" BBK_DIFF_A="-0.32925"/>
      <bbk:Obs TIME_PERIOD="2013-01-15" OBS_VALUE="-12.30682" BBK_DIFF_A="-0.10911"/>
      <bbk:Obs TIME_PERIOD="2013-01-14" OBS_VALUE="-12.19771" BBK_DIFF_A="-4.26613"/>
      <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="-7.93158" BBK_DIFF_A="-10.06668"/>
      <bbk:Obs TIME_PERIOD="2013-01-10" OBS_VALUE="2.1351" BBK_DIFF_A="14.56627"/>
      <bbk:Obs TIME_PERIOD="2013-01-09" OBS_VALUE="-12.43117" BBK_DIFF_A="-23.4511"/>
      <bbk:Obs TIME_PERIOD="2013-01-08" OBS_VALUE="11.01993" BBK_DIFF_A="-0.08676"/>
      <bbk:Obs TIME_PERIOD="2013-01-07" OBS_VALUE="11.10669" BBK_DIFF_A="-0.10589"/>
      <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="11.21258" BBK_DIFF_A="0.61602"/>
      <bbk:Obs TIME_PERIOD="2013-01-03" OBS_VALUE="10.59656" BBK_DIFF_A="-1.43635"/>
      <bbk:Obs TIME_PERIOD="2013-01-02" OBS_VALUE="12.03291" BBK_DIFF_A="32.03291"/>
      <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="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2012-12-27" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <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="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2012-12-20" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2012-12-19" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2012-12-18" OBS_VALUE="-20.0" BBK_DIFF_A="-5.45787"/>
      <bbk:Obs TIME_PERIOD="2012-12-17" OBS_VALUE="-14.54213" BBK_DIFF_A="-6.17198"/>
      <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="-8.37015" BBK_DIFF_A="0.66571"/>
      <bbk:Obs TIME_PERIOD="2012-12-13" OBS_VALUE="-9.03586" BBK_DIFF_A="3.69906"/>
      <bbk:Obs TIME_PERIOD="2012-12-12" OBS_VALUE="-12.73492" BBK_DIFF_A="-10.36517"/>
      <bbk:Obs TIME_PERIOD="2012-12-11" OBS_VALUE="-2.36975" BBK_DIFF_A="0.19175"/>
      <bbk:Obs TIME_PERIOD="2012-12-10" OBS_VALUE="-2.5615" BBK_DIFF_A="0.01772"/>
      <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="-2.57922" BBK_DIFF_A="-0.19388"/>
      <bbk:Obs TIME_PERIOD="2012-12-06" OBS_VALUE="-2.38534" BBK_DIFF_A="16.15412"/>
      <bbk:Obs TIME_PERIOD="2012-12-05" OBS_VALUE="-18.53946" BBK_DIFF_A="-1.27602"/>
      <bbk:Obs TIME_PERIOD="2012-12-04" OBS_VALUE="-17.26344" BBK_DIFF_A="0.53154"/>
      <bbk:Obs TIME_PERIOD="2012-12-03" OBS_VALUE="-17.79498" BBK_DIFF_A="2.20502"/>
      <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="-20.0" BBK_DIFF_A="-20.98903"/>
      <bbk:Obs TIME_PERIOD="2012-11-29" OBS_VALUE="0.98903" BBK_DIFF_A="0.10623"/>
      <bbk:Obs TIME_PERIOD="2012-11-28" OBS_VALUE="0.8828" BBK_DIFF_A="-0.53534"/>
      <bbk:Obs TIME_PERIOD="2012-11-27" OBS_VALUE="1.41814" BBK_DIFF_A="-0.59599"/>
      <bbk:Obs TIME_PERIOD="2012-11-26" OBS_VALUE="2.01413" BBK_DIFF_A="0.29503"/>
      <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="1.7191" BBK_DIFF_A="-0.3143"/>
      <bbk:Obs TIME_PERIOD="2012-11-22" OBS_VALUE="2.0334" BBK_DIFF_A="-1.10878"/>
      <bbk:Obs TIME_PERIOD="2012-11-21" OBS_VALUE="3.14218" BBK_DIFF_A="-0.02504"/>
      <bbk:Obs TIME_PERIOD="2012-11-20" OBS_VALUE="3.16722" BBK_DIFF_A="0.11214"/>
      <bbk:Obs TIME_PERIOD="2012-11-19" OBS_VALUE="3.05508" BBK_DIFF_A="-0.00365"/>
      <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="3.05873" BBK_DIFF_A="0.69987"/>
      <bbk:Obs TIME_PERIOD="2012-11-15" OBS_VALUE="2.35886" BBK_DIFF_A="0.97071"/>
      <bbk:Obs TIME_PERIOD="2012-11-14" OBS_VALUE="1.38815" BBK_DIFF_A="-0.45102"/>
      <bbk:Obs TIME_PERIOD="2012-11-13" OBS_VALUE="1.83917" BBK_DIFF_A="2.38382"/>
      <bbk:Obs TIME_PERIOD="2012-11-12" OBS_VALUE="-0.54465" BBK_DIFF_A="0.16265"/>
      <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="-0.7073" BBK_DIFF_A="-20.7073"/>
      <bbk:Obs TIME_PERIOD="2012-11-08" OBS_VALUE="20.0" BBK_DIFF_A="22.1948"/>
      <bbk:Obs TIME_PERIOD="2012-11-07" OBS_VALUE="-2.1948" BBK_DIFF_A="0.29094"/>
      <bbk:Obs TIME_PERIOD="2012-11-06" OBS_VALUE="-2.48574" BBK_DIFF_A="11.925"/>
      <bbk:Obs TIME_PERIOD="2012-11-05" OBS_VALUE="-14.41074" BBK_DIFF_A="-1.2259"/>
      <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="-13.18484" BBK_DIFF_A="-0.20989"/>
      <bbk:Obs TIME_PERIOD="2012-11-01" OBS_VALUE="-12.97495" BBK_DIFF_A="-7.53269"/>
      <bbk:Obs TIME_PERIOD="2012-10-31" OBS_VALUE="-5.44226" BBK_DIFF_A="-7.00891"/>
      <bbk:Obs TIME_PERIOD="2012-10-30" OBS_VALUE="1.56665" BBK_DIFF_A="-0.1486"/>
      <bbk:Obs TIME_PERIOD="2012-10-29" OBS_VALUE="1.71525" BBK_DIFF_A="-0.06169"/>
      <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="1.77694" BBK_DIFF_A="-1.12244"/>
      <bbk:Obs TIME_PERIOD="2012-10-25" OBS_VALUE="2.89938" BBK_DIFF_A="0.9665"/>
      <bbk:Obs TIME_PERIOD="2012-10-24" OBS_VALUE="1.93288" BBK_DIFF_A="16.60389"/>
      <bbk:Obs TIME_PERIOD="2012-10-23" OBS_VALUE="-14.67101" BBK_DIFF_A="-1.78945"/>
      <bbk:Obs TIME_PERIOD="2012-10-22" OBS_VALUE="-12.88156" BBK_DIFF_A="1.68791"/>
      <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="-14.56947" BBK_DIFF_A="-1.01626"/>
      <bbk:Obs TIME_PERIOD="2012-10-18" OBS_VALUE="-13.55321" BBK_DIFF_A="-0.58335"/>
      <bbk:Obs TIME_PERIOD="2012-10-17" OBS_VALUE="-12.96986" BBK_DIFF_A="-15.91582"/>
      <bbk:Obs TIME_PERIOD="2012-10-16" OBS_VALUE="2.94596" BBK_DIFF_A="-0.02129"/>
      <bbk:Obs TIME_PERIOD="2012-10-15" OBS_VALUE="2.96725" BBK_DIFF_A="-0.29072"/>
      <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="3.25797" BBK_DIFF_A="0.33376"/>
      <bbk:Obs TIME_PERIOD="2012-10-11" OBS_VALUE="2.92421" BBK_DIFF_A="-0.00567"/>
      <bbk:Obs TIME_PERIOD="2012-10-10" OBS_VALUE="2.92988" BBK_DIFF_A="-0.1238"/>
      <bbk:Obs TIME_PERIOD="2012-10-09" OBS_VALUE="3.05368" BBK_DIFF_A="-1.52168"/>
      <bbk:Obs TIME_PERIOD="2012-10-08" OBS_VALUE="4.57536" BBK_DIFF_A="1.60806"/>
      <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="2.9673" BBK_DIFF_A="0.62517"/>
      <bbk:Obs TIME_PERIOD="2012-10-04" OBS_VALUE="2.34213" BBK_DIFF_A="-4.27258"/>
      <bbk:Obs TIME_PERIOD="2012-10-03" OBS_VALUE="6.61471" BBK_DIFF_A="2.58417"/>
      <bbk:Obs TIME_PERIOD="2012-10-02" OBS_VALUE="4.03054" BBK_DIFF_A="-0.04368"/>
      <bbk:Obs TIME_PERIOD="2012-10-01" OBS_VALUE="4.07422" BBK_DIFF_A="1.58715"/>
      <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="2.48707" BBK_DIFF_A="0.46149"/>
      <bbk:Obs TIME_PERIOD="2012-09-27" OBS_VALUE="2.02558" BBK_DIFF_A="-0.08787"/>
      <bbk:Obs TIME_PERIOD="2012-09-26" OBS_VALUE="2.11345" BBK_DIFF_A="-0.52729"/>
      <bbk:Obs TIME_PERIOD="2012-09-25" OBS_VALUE="2.64074" BBK_DIFF_A="0.21601"/>
      <bbk:Obs TIME_PERIOD="2012-09-24" OBS_VALUE="2.42473" BBK_DIFF_A="-0.53056"/>
      <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="2.95529" BBK_DIFF_A="0.02775"/>
      <bbk:Obs TIME_PERIOD="2012-09-20" OBS_VALUE="2.92754" BBK_DIFF_A="0.47785"/>
      <bbk:Obs TIME_PERIOD="2012-09-19" OBS_VALUE="2.44969" BBK_DIFF_A="1.20689"/>
      <bbk:Obs TIME_PERIOD="2012-09-18" OBS_VALUE="1.2428" BBK_DIFF_A="-2.55718"/>
      <bbk:Obs TIME_PERIOD="2012-09-17" OBS_VALUE="3.79998" BBK_DIFF_A="0.31387"/>
      <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="3.48611" BBK_DIFF_A="0.5705"/>
      <bbk:Obs TIME_PERIOD="2012-09-13" OBS_VALUE="2.91561" BBK_DIFF_A="4.11036"/>
      <bbk:Obs TIME_PERIOD="2012-09-12" OBS_VALUE="-1.19475" BBK_DIFF_A="10.43073"/>
      <bbk:Obs TIME_PERIOD="2012-09-11" OBS_VALUE="-11.62548" BBK_DIFF_A="-31.62548"/>
      <bbk:Obs TIME_PERIOD="2012-09-10" OBS_VALUE="20.0" BBK_DIFF_A="17.13317"/>
      <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="2.86683" BBK_DIFF_A="0.41934"/>
      <bbk:Obs TIME_PERIOD="2012-09-06" OBS_VALUE="2.44749" BBK_DIFF_A="0.0824"/>
      <bbk:Obs TIME_PERIOD="2012-09-05" OBS_VALUE="2.36509" BBK_DIFF_A="0.03542"/>
      <bbk:Obs TIME_PERIOD="2012-09-04" OBS_VALUE="2.32967" BBK_DIFF_A="-0.03044"/>
      <bbk:Obs TIME_PERIOD="2012-09-03" OBS_VALUE="2.36011" BBK_DIFF_A="-1.16847"/>
      <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="3.52858" BBK_DIFF_A="-0.16068"/>
      <bbk:Obs TIME_PERIOD="2012-08-30" OBS_VALUE="3.68926" BBK_DIFF_A="-0.11001"/>
      <bbk:Obs TIME_PERIOD="2012-08-29" OBS_VALUE="3.79927" BBK_DIFF_A="0.0129"/>
      <bbk:Obs TIME_PERIOD="2012-08-28" OBS_VALUE="3.78637" BBK_DIFF_A="0.02551"/>
      <bbk:Obs TIME_PERIOD="2012-08-27" OBS_VALUE="3.76086" BBK_DIFF_A="0.3504"/>
      <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="3.41046" BBK_DIFF_A="-0.45561"/>
      <bbk:Obs TIME_PERIOD="2012-08-23" OBS_VALUE="3.86607" BBK_DIFF_A="0.4529"/>
      <bbk:Obs TIME_PERIOD="2012-08-22" OBS_VALUE="3.41317" BBK_DIFF_A="-0.37178"/>
      <bbk:Obs TIME_PERIOD="2012-08-21" OBS_VALUE="3.78495" BBK_DIFF_A="0.39601"/>
      <bbk:Obs TIME_PERIOD="2012-08-20" OBS_VALUE="3.38894" BBK_DIFF_A="-0.71136"/>
      <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="4.1003" BBK_DIFF_A="-0.14456"/>
      <bbk:Obs TIME_PERIOD="2012-08-16" OBS_VALUE="4.24486" BBK_DIFF_A="1.21507"/>
      <bbk:Obs TIME_PERIOD="2012-08-15" OBS_VALUE="3.02979" BBK_DIFF_A="0.07728"/>
      <bbk:Obs TIME_PERIOD="2012-08-14" OBS_VALUE="2.95251" BBK_DIFF_A="0.55838"/>
      <bbk:Obs TIME_PERIOD="2012-08-13" OBS_VALUE="2.39413" BBK_DIFF_A="-0.0303"/>
      <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="2.42443" BBK_DIFF_A="-0.43076"/>
      <bbk:Obs TIME_PERIOD="2012-08-09" OBS_VALUE="2.85519" BBK_DIFF_A="-0.32875"/>
      <bbk:Obs TIME_PERIOD="2012-08-08" OBS_VALUE="3.18394" BBK_DIFF_A="-0.93918"/>
      <bbk:Obs TIME_PERIOD="2012-08-07" OBS_VALUE="4.12312" BBK_DIFF_A="1.14206"/>
      <bbk:Obs TIME_PERIOD="2012-08-06" OBS_VALUE="2.98106" BBK_DIFF_A="-0.10878"/>
      <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="3.08984" BBK_DIFF_A="-0.34797"/>
      <bbk:Obs TIME_PERIOD="2012-08-02" OBS_VALUE="3.43781" BBK_DIFF_A="2.05692"/>
      <bbk:Obs TIME_PERIOD="2012-08-01" OBS_VALUE="1.38089" BBK_DIFF_A="-0.75938"/>
      <bbk:Obs TIME_PERIOD="2012-07-31" OBS_VALUE="2.14027" BBK_DIFF_A="-0.15513"/>
      <bbk:Obs TIME_PERIOD="2012-07-30" OBS_VALUE="2.2954" BBK_DIFF_A="-0.06888"/>
      <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="2.36428" BBK_DIFF_A="-0.32487"/>
      <bbk:Obs TIME_PERIOD="2012-07-26" OBS_VALUE="2.68915" BBK_DIFF_A="0.00502"/>
      <bbk:Obs TIME_PERIOD="2012-07-25" OBS_VALUE="2.68413" BBK_DIFF_A="-1.46726"/>
      <bbk:Obs TIME_PERIOD="2012-07-24" OBS_VALUE="4.15139" BBK_DIFF_A="-0.04156"/>
      <bbk:Obs TIME_PERIOD="2012-07-23" OBS_VALUE="4.19295" BBK_DIFF_A="-0.09357"/>
      <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="4.28652" BBK_DIFF_A="-0.07075"/>
      <bbk:Obs TIME_PERIOD="2012-07-19" OBS_VALUE="4.35727" BBK_DIFF_A="1.34989"/>
      <bbk:Obs TIME_PERIOD="2012-07-18" OBS_VALUE="3.00738" BBK_DIFF_A="0.07373"/>
      <bbk:Obs TIME_PERIOD="2012-07-17" OBS_VALUE="2.93365" BBK_DIFF_A="-0.3746"/>
      <bbk:Obs TIME_PERIOD="2012-07-16" OBS_VALUE="3.30825" BBK_DIFF_A="-0.27027"/>
      <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="3.57852" BBK_DIFF_A="1.44328"/>
      <bbk:Obs TIME_PERIOD="2012-07-12" OBS_VALUE="2.13524" BBK_DIFF_A="-0.76141"/>
      <bbk:Obs TIME_PERIOD="2012-07-11" OBS_VALUE="2.89665" BBK_DIFF_A="0.14354"/>
      <bbk:Obs TIME_PERIOD="2012-07-10" OBS_VALUE="2.75311" BBK_DIFF_A="0.68132"/>
      <bbk:Obs TIME_PERIOD="2012-07-09" OBS_VALUE="2.07179" BBK_DIFF_A="-0.81974"/>
      <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="2.89153" BBK_DIFF_A="-0.52117"/>
      <bbk:Obs TIME_PERIOD="2012-07-05" OBS_VALUE="3.4127" BBK_DIFF_A="0.31897"/>
      <bbk:Obs TIME_PERIOD="2012-07-04" OBS_VALUE="3.09373" BBK_DIFF_A="0.14988"/>
      <bbk:Obs TIME_PERIOD="2012-07-03" OBS_VALUE="2.94385" BBK_DIFF_A="-0.21357"/>
      <bbk:Obs TIME_PERIOD="2012-07-02" OBS_VALUE="3.15742" BBK_DIFF_A="3.49255"/>
      <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="-0.33513" BBK_DIFF_A="0.30615"/>
      <bbk:Obs TIME_PERIOD="2012-06-28" OBS_VALUE="-0.64128" BBK_DIFF_A="0.74843"/>
      <bbk:Obs TIME_PERIOD="2012-06-27" OBS_VALUE="-1.38971" BBK_DIFF_A="-0.41962"/>
      <bbk:Obs TIME_PERIOD="2012-06-26" OBS_VALUE="-0.97009" BBK_DIFF_A="-0.31589"/>
      <bbk:Obs TIME_PERIOD="2012-06-25" OBS_VALUE="-0.6542" BBK_DIFF_A="0.60029"/>
      <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="-1.25449" BBK_DIFF_A="0.192"/>
      <bbk:Obs TIME_PERIOD="2012-06-21" OBS_VALUE="-1.44649" BBK_DIFF_A="0.12316"/>
      <bbk:Obs TIME_PERIOD="2012-06-20" OBS_VALUE="-1.56965" BBK_DIFF_A="-0.14014"/>
      <bbk:Obs TIME_PERIOD="2012-06-19" OBS_VALUE="-1.42951" BBK_DIFF_A="-3.78443"/>
      <bbk:Obs TIME_PERIOD="2012-06-18" OBS_VALUE="2.35492" BBK_DIFF_A="0.14913"/>
      <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="2.20579" BBK_DIFF_A="0.33971"/>
      <bbk:Obs TIME_PERIOD="2012-06-14" OBS_VALUE="1.86608" BBK_DIFF_A="-0.44547"/>
      <bbk:Obs TIME_PERIOD="2012-06-13" OBS_VALUE="2.31155" BBK_DIFF_A="-0.05822"/>
      <bbk:Obs TIME_PERIOD="2012-06-12" OBS_VALUE="2.36977" BBK_DIFF_A="-0.16886"/>
      <bbk:Obs TIME_PERIOD="2012-06-11" OBS_VALUE="2.53863" BBK_DIFF_A="0.3836"/>
      <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="2.15503" BBK_DIFF_A="-0.10254"/>
      <bbk:Obs TIME_PERIOD="2012-06-07" OBS_VALUE="2.25757" BBK_DIFF_A="0.10932"/>
      <bbk:Obs TIME_PERIOD="2012-06-06" OBS_VALUE="2.14825" BBK_DIFF_A="0.23254"/>
      <bbk:Obs TIME_PERIOD="2012-06-05" OBS_VALUE="1.91571" BBK_DIFF_A="-0.14676"/>
      <bbk:Obs TIME_PERIOD="2012-06-04" OBS_VALUE="2.06247" BBK_DIFF_A="-0.58389"/>
      <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="2.64636" BBK_DIFF_A="-0.12853"/>
      <bbk:Obs TIME_PERIOD="2012-05-31" OBS_VALUE="2.77489" BBK_DIFF_A="0.03645"/>
      <bbk:Obs TIME_PERIOD="2012-05-30" OBS_VALUE="2.73844" BBK_DIFF_A="-0.2319"/>
      <bbk:Obs TIME_PERIOD="2012-05-29" OBS_VALUE="2.97034" BBK_DIFF_A="0.06424"/>
      <bbk:Obs TIME_PERIOD="2012-05-28" OBS_VALUE="2.9061" BBK_DIFF_A="0.15789"/>
      <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="2.74821" BBK_DIFF_A="0.03848"/>
      <bbk:Obs TIME_PERIOD="2012-05-24" OBS_VALUE="2.70973" BBK_DIFF_A="0.06527"/>
      <bbk:Obs TIME_PERIOD="2012-05-23" OBS_VALUE="2.64446" BBK_DIFF_A="-0.19926"/>
      <bbk:Obs TIME_PERIOD="2012-05-22" OBS_VALUE="2.84372" BBK_DIFF_A="-0.03481"/>
      <bbk:Obs TIME_PERIOD="2012-05-21" OBS_VALUE="2.87853" BBK_DIFF_A="0.14455"/>
      <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="2.73398" BBK_DIFF_A="0.02155"/>
      <bbk:Obs TIME_PERIOD="2012-05-17" OBS_VALUE="2.71243" BBK_DIFF_A="-0.07701"/>
      <bbk:Obs TIME_PERIOD="2012-05-16" OBS_VALUE="2.78944" BBK_DIFF_A="0.10855"/>
      <bbk:Obs TIME_PERIOD="2012-05-15" OBS_VALUE="2.68089" BBK_DIFF_A="-0.22084"/>
      <bbk:Obs TIME_PERIOD="2012-05-14" OBS_VALUE="2.90173" BBK_DIFF_A="-0.12339"/>
      <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="3.02512" BBK_DIFF_A="-0.11939"/>
      <bbk:Obs TIME_PERIOD="2012-05-10" OBS_VALUE="3.14451" BBK_DIFF_A="-0.14743"/>
      <bbk:Obs TIME_PERIOD="2012-05-09" OBS_VALUE="3.29194" BBK_DIFF_A="-0.21217"/>
      <bbk:Obs TIME_PERIOD="2012-05-08" OBS_VALUE="3.50411" BBK_DIFF_A="-0.01819"/>
      <bbk:Obs TIME_PERIOD="2012-05-07" OBS_VALUE="3.5223" BBK_DIFF_A="0.24024"/>
      <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="3.28206" BBK_DIFF_A="-0.27382"/>
      <bbk:Obs TIME_PERIOD="2012-05-03" OBS_VALUE="3.55588" BBK_DIFF_A="0.06925"/>
      <bbk:Obs TIME_PERIOD="2012-05-02" OBS_VALUE="3.48663" BBK_DIFF_A="-6.8E-4"/>
      <bbk:Obs TIME_PERIOD="2012-05-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2012-04-30" OBS_VALUE="3.48731" BBK_DIFF_A="-0.1852"/>
      <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="3.67251" BBK_DIFF_A="0.70136"/>
      <bbk:Obs TIME_PERIOD="2012-04-26" OBS_VALUE="2.97115" BBK_DIFF_A="-0.11494"/>
      <bbk:Obs TIME_PERIOD="2012-04-25" OBS_VALUE="3.08609" BBK_DIFF_A="-0.43656"/>
      <bbk:Obs TIME_PERIOD="2012-04-24" OBS_VALUE="3.52265" BBK_DIFF_A="0.30495"/>
      <bbk:Obs TIME_PERIOD="2012-04-23" OBS_VALUE="3.2177" BBK_DIFF_A="-0.00437"/>
      <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="3.22207" BBK_DIFF_A="-0.48903"/>
      <bbk:Obs TIME_PERIOD="2012-04-19" OBS_VALUE="3.7111" BBK_DIFF_A="0.24754"/>
      <bbk:Obs TIME_PERIOD="2012-04-18" OBS_VALUE="3.46356" BBK_DIFF_A="0.06451"/>
      <bbk:Obs TIME_PERIOD="2012-04-17" OBS_VALUE="3.39905" BBK_DIFF_A="0.0517"/>
      <bbk:Obs TIME_PERIOD="2012-04-16" OBS_VALUE="3.34735" BBK_DIFF_A="-0.07127"/>
      <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="3.41862" BBK_DIFF_A="0.0356"/>
      <bbk:Obs TIME_PERIOD="2012-04-12" OBS_VALUE="3.38302" BBK_DIFF_A="-0.16041"/>
      <bbk:Obs TIME_PERIOD="2012-04-11" OBS_VALUE="3.54343" BBK_DIFF_A="0.22691"/>
      <bbk:Obs TIME_PERIOD="2012-04-10" OBS_VALUE="3.31652" BBK_DIFF_A="0.02088"/>
      <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="3.29564" BBK_DIFF_A="0.16241"/>
      <bbk:Obs TIME_PERIOD="2012-04-04" OBS_VALUE="3.13323" BBK_DIFF_A="0.24044"/>
      <bbk:Obs TIME_PERIOD="2012-04-03" OBS_VALUE="2.89279" BBK_DIFF_A="0.12339"/>
      <bbk:Obs TIME_PERIOD="2012-04-02" OBS_VALUE="2.7694" BBK_DIFF_A="0.16517"/>
      <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="2.60423" BBK_DIFF_A="-0.45512"/>
      <bbk:Obs TIME_PERIOD="2012-03-29" OBS_VALUE="3.05935" BBK_DIFF_A="0.00436"/>
      <bbk:Obs TIME_PERIOD="2012-03-28" OBS_VALUE="3.05499" BBK_DIFF_A="0.25193"/>
      <bbk:Obs TIME_PERIOD="2012-03-27" OBS_VALUE="2.80306" BBK_DIFF_A="0.15684"/>
      <bbk:Obs TIME_PERIOD="2012-03-26" OBS_VALUE="2.64622" BBK_DIFF_A="-0.16963"/>
      <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="2.81585" BBK_DIFF_A="0.08111"/>
      <bbk:Obs TIME_PERIOD="2012-03-22" OBS_VALUE="2.73474" BBK_DIFF_A="0.1213"/>
      <bbk:Obs TIME_PERIOD="2012-03-21" OBS_VALUE="2.61344" BBK_DIFF_A="-0.01387"/>
      <bbk:Obs TIME_PERIOD="2012-03-20" OBS_VALUE="2.62731" BBK_DIFF_A="-0.11363"/>
      <bbk:Obs TIME_PERIOD="2012-03-19" OBS_VALUE="2.74094" BBK_DIFF_A="0.23421"/>
      <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="2.50673" BBK_DIFF_A="-0.09312"/>
      <bbk:Obs TIME_PERIOD="2012-03-15" OBS_VALUE="2.59985" BBK_DIFF_A="-0.17559"/>
      <bbk:Obs TIME_PERIOD="2012-03-14" OBS_VALUE="2.77544" BBK_DIFF_A="-0.16874"/>
      <bbk:Obs TIME_PERIOD="2012-03-13" OBS_VALUE="2.94418" BBK_DIFF_A="-0.45653"/>
      <bbk:Obs TIME_PERIOD="2012-03-12" OBS_VALUE="3.40071" BBK_DIFF_A="0.04994"/>
      <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="3.35077" BBK_DIFF_A="-0.03111"/>
      <bbk:Obs TIME_PERIOD="2012-03-08" OBS_VALUE="3.38188" BBK_DIFF_A="-0.07461"/>
      <bbk:Obs TIME_PERIOD="2012-03-07" OBS_VALUE="3.45649" BBK_DIFF_A="-0.26269"/>
      <bbk:Obs TIME_PERIOD="2012-03-06" OBS_VALUE="3.71918" BBK_DIFF_A="0.04122"/>
      <bbk:Obs TIME_PERIOD="2012-03-05" OBS_VALUE="3.67796" BBK_DIFF_A="0.44548"/>
      <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="3.23248" BBK_DIFF_A="-0.1019"/>
      <bbk:Obs TIME_PERIOD="2012-03-01" OBS_VALUE="3.33438" BBK_DIFF_A="-0.45354"/>
      <bbk:Obs TIME_PERIOD="2012-02-29" OBS_VALUE="3.78792" BBK_DIFF_A="0.2952"/>
      <bbk:Obs TIME_PERIOD="2012-02-28" OBS_VALUE="3.49272" BBK_DIFF_A="0.59439"/>
      <bbk:Obs TIME_PERIOD="2012-02-27" OBS_VALUE="2.89833" BBK_DIFF_A="0.08513"/>
      <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="2.8132" BBK_DIFF_A="-0.30587"/>
      <bbk:Obs TIME_PERIOD="2012-02-23" OBS_VALUE="3.11907" BBK_DIFF_A="0.1768"/>
      <bbk:Obs TIME_PERIOD="2012-02-22" OBS_VALUE="2.94227" BBK_DIFF_A="-0.71974"/>
      <bbk:Obs TIME_PERIOD="2012-02-21" OBS_VALUE="3.66201" BBK_DIFF_A="0.06683"/>
      <bbk:Obs TIME_PERIOD="2012-02-20" OBS_VALUE="3.59518" BBK_DIFF_A="-0.16865"/>
      <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="3.76383" BBK_DIFF_A="-0.35802"/>
      <bbk:Obs TIME_PERIOD="2012-02-16" OBS_VALUE="4.12185" BBK_DIFF_A="0.02758"/>
      <bbk:Obs TIME_PERIOD="2012-02-15" OBS_VALUE="4.09427" BBK_DIFF_A="0.59566"/>
      <bbk:Obs TIME_PERIOD="2012-02-14" OBS_VALUE="3.49861" BBK_DIFF_A="-0.54388"/>
      <bbk:Obs TIME_PERIOD="2012-02-13" OBS_VALUE="4.04249" BBK_DIFF_A="0.17501"/>
      <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="3.86748" BBK_DIFF_A="-0.47905"/>
      <bbk:Obs TIME_PERIOD="2012-02-09" OBS_VALUE="4.34653" BBK_DIFF_A="-0.36545"/>
      <bbk:Obs TIME_PERIOD="2012-02-08" OBS_VALUE="4.71198" BBK_DIFF_A="0.24366"/>
      <bbk:Obs TIME_PERIOD="2012-02-07" OBS_VALUE="4.46832" BBK_DIFF_A="-0.18388"/>
      <bbk:Obs TIME_PERIOD="2012-02-06" OBS_VALUE="4.6522" BBK_DIFF_A="-0.17685"/>
      <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="4.82905" BBK_DIFF_A="0.3936"/>
      <bbk:Obs TIME_PERIOD="2012-02-02" OBS_VALUE="4.43545" BBK_DIFF_A="0.39389"/>
      <bbk:Obs TIME_PERIOD="2012-02-01" OBS_VALUE="4.04156" BBK_DIFF_A="-0.38534"/>
      <bbk:Obs TIME_PERIOD="2012-01-31" OBS_VALUE="4.4269" BBK_DIFF_A="-0.16217"/>
      <bbk:Obs TIME_PERIOD="2012-01-30" OBS_VALUE="4.58907" BBK_DIFF_A="-0.01136"/>
      <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="4.60043" BBK_DIFF_A="0.29395"/>
      <bbk:Obs TIME_PERIOD="2012-01-26" OBS_VALUE="4.30648" BBK_DIFF_A="-0.15966"/>
      <bbk:Obs TIME_PERIOD="2012-01-25" OBS_VALUE="4.46614" BBK_DIFF_A="-0.10948"/>
      <bbk:Obs TIME_PERIOD="2012-01-24" OBS_VALUE="4.57562" BBK_DIFF_A="-0.04473"/>
      <bbk:Obs TIME_PERIOD="2012-01-23" OBS_VALUE="4.62035" BBK_DIFF_A="0.25691"/>
      <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="4.36344" BBK_DIFF_A="-0.06112"/>
      <bbk:Obs TIME_PERIOD="2012-01-19" OBS_VALUE="4.42456" BBK_DIFF_A="0.27937"/>
      <bbk:Obs TIME_PERIOD="2012-01-18" OBS_VALUE="4.14519" BBK_DIFF_A="-0.39867"/>
      <bbk:Obs TIME_PERIOD="2012-01-17" OBS_VALUE="4.54386" BBK_DIFF_A="0.08029"/>
      <bbk:Obs TIME_PERIOD="2012-01-16" OBS_VALUE="4.46357" BBK_DIFF_A="0.01013"/>
      <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="4.45344" BBK_DIFF_A="-0.11953"/>
      <bbk:Obs TIME_PERIOD="2012-01-12" OBS_VALUE="4.57297" BBK_DIFF_A="0.47319"/>
      <bbk:Obs TIME_PERIOD="2012-01-11" OBS_VALUE="4.09978" BBK_DIFF_A="0.32696"/>
      <bbk:Obs TIME_PERIOD="2012-01-10" OBS_VALUE="3.77282" BBK_DIFF_A="-0.47474"/>
      <bbk:Obs TIME_PERIOD="2012-01-09" OBS_VALUE="4.24756" BBK_DIFF_A="0.05827"/>
      <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="4.18929" BBK_DIFF_A="0.31948"/>
      <bbk:Obs TIME_PERIOD="2012-01-05" OBS_VALUE="3.86981" BBK_DIFF_A="-0.27055"/>
      <bbk:Obs TIME_PERIOD="2012-01-04" OBS_VALUE="4.14036" BBK_DIFF_A="0.03393"/>
      <bbk:Obs TIME_PERIOD="2012-01-03" OBS_VALUE="4.10643" BBK_DIFF_A="0.01553"/>
      <bbk:Obs TIME_PERIOD="2012-01-02" OBS_VALUE="4.0909" BBK_DIFF_A="0.02704"/>
      <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="4.06386" BBK_DIFF_A="-0.14085"/>
      <bbk:Obs TIME_PERIOD="2011-12-29" OBS_VALUE="4.20471" BBK_DIFF_A="-0.15702"/>
      <bbk:Obs TIME_PERIOD="2011-12-28" OBS_VALUE="4.36173" BBK_DIFF_A="-0.05135"/>
      <bbk:Obs TIME_PERIOD="2011-12-27" OBS_VALUE="4.41308" BBK_DIFF_A="0.16449"/>
      <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="4.24859" BBK_DIFF_A="-0.23829"/>
      <bbk:Obs TIME_PERIOD="2011-12-22" OBS_VALUE="4.48688" BBK_DIFF_A="-0.34826"/>
      <bbk:Obs TIME_PERIOD="2011-12-21" OBS_VALUE="4.83514" BBK_DIFF_A="0.26795"/>
      <bbk:Obs TIME_PERIOD="2011-12-20" OBS_VALUE="4.56719" BBK_DIFF_A="-0.16151"/>
      <bbk:Obs TIME_PERIOD="2011-12-19" OBS_VALUE="4.7287" BBK_DIFF_A="-0.04248"/>
      <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="4.77118" BBK_DIFF_A="-0.13678"/>
      <bbk:Obs TIME_PERIOD="2011-12-15" OBS_VALUE="4.90796" BBK_DIFF_A="-0.35346"/>
      <bbk:Obs TIME_PERIOD="2011-12-14" OBS_VALUE="5.26142" BBK_DIFF_A="-0.19824"/>
      <bbk:Obs TIME_PERIOD="2011-12-13" OBS_VALUE="5.45966" BBK_DIFF_A="-0.08951"/>
      <bbk:Obs TIME_PERIOD="2011-12-12" OBS_VALUE="5.54917" BBK_DIFF_A="0.08967"/>
      <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="5.4595" BBK_DIFF_A="-0.31534"/>
      <bbk:Obs TIME_PERIOD="2011-12-08" OBS_VALUE="5.77484" BBK_DIFF_A="0.51054"/>
      <bbk:Obs TIME_PERIOD="2011-12-07" OBS_VALUE="5.2643" BBK_DIFF_A="0.08509"/>
      <bbk:Obs TIME_PERIOD="2011-12-06" OBS_VALUE="5.17921" BBK_DIFF_A="0.10424"/>
      <bbk:Obs TIME_PERIOD="2011-12-05" OBS_VALUE="5.07497" BBK_DIFF_A="-0.22465"/>
      <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="5.29962" BBK_DIFF_A="0.49728"/>
      <bbk:Obs TIME_PERIOD="2011-12-01" OBS_VALUE="4.80234" BBK_DIFF_A="0.39678"/>
      <bbk:Obs TIME_PERIOD="2011-11-30" OBS_VALUE="4.40556" BBK_DIFF_A="0.28732"/>
      <bbk:Obs TIME_PERIOD="2011-11-29" OBS_VALUE="4.11824" BBK_DIFF_A="0.38491"/>
      <bbk:Obs TIME_PERIOD="2011-11-28" OBS_VALUE="3.73333" BBK_DIFF_A="-0.07144"/>
      <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="3.80477" BBK_DIFF_A="0.03387"/>
      <bbk:Obs TIME_PERIOD="2011-11-24" OBS_VALUE="3.7709" BBK_DIFF_A="-0.30174"/>
      <bbk:Obs TIME_PERIOD="2011-11-23" OBS_VALUE="4.07264" BBK_DIFF_A="0.22575"/>
      <bbk:Obs TIME_PERIOD="2011-11-22" OBS_VALUE="3.84689" BBK_DIFF_A="-0.00394"/>
      <bbk:Obs TIME_PERIOD="2011-11-21" OBS_VALUE="3.85083" BBK_DIFF_A="-0.0124"/>
      <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="3.86323" BBK_DIFF_A="-0.5922"/>
      <bbk:Obs TIME_PERIOD="2011-11-17" OBS_VALUE="4.45543" BBK_DIFF_A="-0.05148"/>
      <bbk:Obs TIME_PERIOD="2011-11-16" OBS_VALUE="4.50691" BBK_DIFF_A="-0.25613"/>
      <bbk:Obs TIME_PERIOD="2011-11-15" OBS_VALUE="4.76304" BBK_DIFF_A="0.04733"/>
      <bbk:Obs TIME_PERIOD="2011-11-14" OBS_VALUE="4.71571" BBK_DIFF_A="0.07485"/>
      <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="4.64086" BBK_DIFF_A="-0.06206"/>
      <bbk:Obs TIME_PERIOD="2011-11-10" OBS_VALUE="4.70292" BBK_DIFF_A="-0.03509"/>
      <bbk:Obs TIME_PERIOD="2011-11-09" OBS_VALUE="4.73801" BBK_DIFF_A="-0.09402"/>
      <bbk:Obs TIME_PERIOD="2011-11-08" OBS_VALUE="4.83203" BBK_DIFF_A="-0.14666"/>
      <bbk:Obs TIME_PERIOD="2011-11-07" OBS_VALUE="4.97869" BBK_DIFF_A="0.06018"/>
      <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="4.91851" BBK_DIFF_A="0.02971"/>
      <bbk:Obs TIME_PERIOD="2011-11-03" OBS_VALUE="4.8888" BBK_DIFF_A="0.1009"/>
      <bbk:Obs TIME_PERIOD="2011-11-02" OBS_VALUE="4.7879" BBK_DIFF_A="0.24051"/>
      <bbk:Obs TIME_PERIOD="2011-11-01" OBS_VALUE="4.54739" BBK_DIFF_A="0.30625"/>
      <bbk:Obs TIME_PERIOD="2011-10-31" OBS_VALUE="4.24114" BBK_DIFF_A="0.01916"/>
      <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="4.22198" BBK_DIFF_A="-0.18023"/>
      <bbk:Obs TIME_PERIOD="2011-10-27" OBS_VALUE="4.40221" BBK_DIFF_A="-0.08243"/>
      <bbk:Obs TIME_PERIOD="2011-10-26" OBS_VALUE="4.48464" BBK_DIFF_A="0.1869"/>
      <bbk:Obs TIME_PERIOD="2011-10-25" OBS_VALUE="4.29774" BBK_DIFF_A="0.05235"/>
      <bbk:Obs TIME_PERIOD="2011-10-24" OBS_VALUE="4.24539" BBK_DIFF_A="-0.10067"/>
      <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="4.34606" BBK_DIFF_A="-0.05704"/>
      <bbk:Obs TIME_PERIOD="2011-10-20" OBS_VALUE="4.4031" BBK_DIFF_A="0.00298"/>
      <bbk:Obs TIME_PERIOD="2011-10-19" OBS_VALUE="4.40012" BBK_DIFF_A="-0.32484"/>
      <bbk:Obs TIME_PERIOD="2011-10-18" OBS_VALUE="4.72496" BBK_DIFF_A="0.41084"/>
      <bbk:Obs TIME_PERIOD="2011-10-17" OBS_VALUE="4.31412" BBK_DIFF_A="-0.12266"/>
      <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="4.43678" BBK_DIFF_A="0.17481"/>
      <bbk:Obs TIME_PERIOD="2011-10-13" OBS_VALUE="4.26197" BBK_DIFF_A="-0.37285"/>
      <bbk:Obs TIME_PERIOD="2011-10-12" OBS_VALUE="4.63482" BBK_DIFF_A="-0.02582"/>
      <bbk:Obs TIME_PERIOD="2011-10-11" OBS_VALUE="4.66064" BBK_DIFF_A="0.06737"/>
      <bbk:Obs TIME_PERIOD="2011-10-10" OBS_VALUE="4.59327" BBK_DIFF_A="0.27888"/>
      <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="4.31439" BBK_DIFF_A="-0.6786"/>
      <bbk:Obs TIME_PERIOD="2011-10-06" OBS_VALUE="4.99299" BBK_DIFF_A="0.25938"/>
      <bbk:Obs TIME_PERIOD="2011-10-05" OBS_VALUE="4.73361" BBK_DIFF_A="-0.05773"/>
      <bbk:Obs TIME_PERIOD="2011-10-04" OBS_VALUE="4.79134" BBK_DIFF_A="-0.07783"/>
      <bbk:Obs TIME_PERIOD="2011-10-03" OBS_VALUE="4.86917" BBK_DIFF_A="0.01309"/>
      <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="4.85608" BBK_DIFF_A="-0.24145"/>
      <bbk:Obs TIME_PERIOD="2011-09-29" OBS_VALUE="5.09753" BBK_DIFF_A="-0.13827"/>
      <bbk:Obs TIME_PERIOD="2011-09-28" OBS_VALUE="5.2358" BBK_DIFF_A="-0.04103"/>
      <bbk:Obs TIME_PERIOD="2011-09-27" OBS_VALUE="5.27683" BBK_DIFF_A="0.10318"/>
      <bbk:Obs TIME_PERIOD="2011-09-26" OBS_VALUE="5.17365" BBK_DIFF_A="0.54891"/>
      <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="4.62474" BBK_DIFF_A="0.0019"/>
      <bbk:Obs TIME_PERIOD="2011-09-22" OBS_VALUE="4.62284" BBK_DIFF_A="-0.17937"/>
      <bbk:Obs TIME_PERIOD="2011-09-21" OBS_VALUE="4.80221" BBK_DIFF_A="-0.02869"/>
      <bbk:Obs TIME_PERIOD="2011-09-20" OBS_VALUE="4.8309" BBK_DIFF_A="-0.35656"/>
      <bbk:Obs TIME_PERIOD="2011-09-19" OBS_VALUE="5.18746" BBK_DIFF_A="0.28888"/>
      <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="4.89858" BBK_DIFF_A="0.05991"/>
      <bbk:Obs TIME_PERIOD="2011-09-15" OBS_VALUE="4.83867" BBK_DIFF_A="-0.08483"/>
      <bbk:Obs TIME_PERIOD="2011-09-14" OBS_VALUE="4.9235" BBK_DIFF_A="-0.26709"/>
      <bbk:Obs TIME_PERIOD="2011-09-13" OBS_VALUE="5.19059" BBK_DIFF_A="-0.06777"/>
      <bbk:Obs TIME_PERIOD="2011-09-12" OBS_VALUE="5.25836" BBK_DIFF_A="-0.68087"/>
      <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="5.93923" BBK_DIFF_A="0.08818"/>
      <bbk:Obs TIME_PERIOD="2011-09-08" OBS_VALUE="5.85105" BBK_DIFF_A="-0.09697"/>
      <bbk:Obs TIME_PERIOD="2011-09-07" OBS_VALUE="5.94802" BBK_DIFF_A="-0.04533"/>
      <bbk:Obs TIME_PERIOD="2011-09-06" OBS_VALUE="5.99335" BBK_DIFF_A="-0.10296"/>
      <bbk:Obs TIME_PERIOD="2011-09-05" OBS_VALUE="6.09631" BBK_DIFF_A="0.66193"/>
      <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="5.43438" BBK_DIFF_A="1.75217"/>
      <bbk:Obs TIME_PERIOD="2011-09-01" OBS_VALUE="3.68221" BBK_DIFF_A="-1.89628"/>
      <bbk:Obs TIME_PERIOD="2011-08-31" OBS_VALUE="5.57849" BBK_DIFF_A="0.19161"/>
      <bbk:Obs TIME_PERIOD="2011-08-30" OBS_VALUE="5.38688" BBK_DIFF_A="-0.24056"/>
      <bbk:Obs TIME_PERIOD="2011-08-29" OBS_VALUE="5.62744" BBK_DIFF_A="-0.13132"/>
      <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="5.75876" BBK_DIFF_A="0.34368"/>
      <bbk:Obs TIME_PERIOD="2011-08-25" OBS_VALUE="5.41508" BBK_DIFF_A="-0.544"/>
      <bbk:Obs TIME_PERIOD="2011-08-24" OBS_VALUE="5.95908" BBK_DIFF_A="-0.31951"/>
      <bbk:Obs TIME_PERIOD="2011-08-23" OBS_VALUE="6.27859" BBK_DIFF_A="-0.27447"/>
      <bbk:Obs TIME_PERIOD="2011-08-22" OBS_VALUE="6.55306" BBK_DIFF_A="0.11437"/>
      <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="6.43869" BBK_DIFF_A="0.03194"/>
      <bbk:Obs TIME_PERIOD="2011-08-18" OBS_VALUE="6.40675" BBK_DIFF_A="-0.25327"/>
      <bbk:Obs TIME_PERIOD="2011-08-17" OBS_VALUE="6.66002" BBK_DIFF_A="-0.15985"/>
      <bbk:Obs TIME_PERIOD="2011-08-16" OBS_VALUE="6.81987" BBK_DIFF_A="-0.09091"/>
      <bbk:Obs TIME_PERIOD="2011-08-15" OBS_VALUE="6.91078" BBK_DIFF_A="-0.34401"/>
      <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="7.25479" BBK_DIFF_A="0.15316"/>
      <bbk:Obs TIME_PERIOD="2011-08-11" OBS_VALUE="7.10163" BBK_DIFF_A="0.31788"/>
      <bbk:Obs TIME_PERIOD="2011-08-10" OBS_VALUE="6.78375" BBK_DIFF_A="1.59758"/>
      <bbk:Obs TIME_PERIOD="2011-08-09" OBS_VALUE="5.18617" BBK_DIFF_A="1.26309"/>
      <bbk:Obs TIME_PERIOD="2011-08-08" OBS_VALUE="3.92308" BBK_DIFF_A="-1.35856"/>
      <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="5.28164" BBK_DIFF_A="0.86371"/>
      <bbk:Obs TIME_PERIOD="2011-08-04" OBS_VALUE="4.41793" BBK_DIFF_A="0.14708"/>
      <bbk:Obs TIME_PERIOD="2011-08-03" OBS_VALUE="4.27085" BBK_DIFF_A="0.34763"/>
      <bbk:Obs TIME_PERIOD="2011-08-02" OBS_VALUE="3.92322" BBK_DIFF_A="0.31283"/>
      <bbk:Obs TIME_PERIOD="2011-08-01" OBS_VALUE="3.61039" BBK_DIFF_A="0.1185"/>
      <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="3.49189" BBK_DIFF_A="0.27982"/>
      <bbk:Obs TIME_PERIOD="2011-07-28" OBS_VALUE="3.21207" BBK_DIFF_A="0.08518"/>
      <bbk:Obs TIME_PERIOD="2011-07-27" OBS_VALUE="3.12689" BBK_DIFF_A="0.12275"/>
      <bbk:Obs TIME_PERIOD="2011-07-26" OBS_VALUE="3.00414" BBK_DIFF_A="-0.20221"/>
      <bbk:Obs TIME_PERIOD="2011-07-25" OBS_VALUE="3.20635" BBK_DIFF_A="0.02976"/>
      <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="3.17659" BBK_DIFF_A="-0.66183"/>
      <bbk:Obs TIME_PERIOD="2011-07-21" OBS_VALUE="3.83842" BBK_DIFF_A="0.85275"/>
      <bbk:Obs TIME_PERIOD="2011-07-20" OBS_VALUE="2.98567" BBK_DIFF_A="-0.19921"/>
      <bbk:Obs TIME_PERIOD="2011-07-19" OBS_VALUE="3.18488" BBK_DIFF_A="-0.10921"/>
      <bbk:Obs TIME_PERIOD="2011-07-18" OBS_VALUE="3.29409" BBK_DIFF_A="-0.01563"/>
      <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="3.30972" BBK_DIFF_A="0.01234"/>
      <bbk:Obs TIME_PERIOD="2011-07-14" OBS_VALUE="3.29738" BBK_DIFF_A="-0.10663"/>
      <bbk:Obs TIME_PERIOD="2011-07-13" OBS_VALUE="3.40401" BBK_DIFF_A="0.34545"/>
      <bbk:Obs TIME_PERIOD="2011-07-12" OBS_VALUE="3.05856" BBK_DIFF_A="1.18809"/>
      <bbk:Obs TIME_PERIOD="2011-07-11" OBS_VALUE="1.87047" BBK_DIFF_A="-0.2176"/>
      <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="2.08807" BBK_DIFF_A="0.09993"/>
      <bbk:Obs TIME_PERIOD="2011-07-07" OBS_VALUE="1.98814" BBK_DIFF_A="0.06097"/>
      <bbk:Obs TIME_PERIOD="2011-07-06" OBS_VALUE="1.92717" BBK_DIFF_A="-0.09366"/>
      <bbk:Obs TIME_PERIOD="2011-07-05" OBS_VALUE="2.02083" BBK_DIFF_A="-0.18684"/>
      <bbk:Obs TIME_PERIOD="2011-07-04" OBS_VALUE="2.20767" BBK_DIFF_A="-0.15048"/>
      <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="2.35815" BBK_DIFF_A="0.07974"/>
      <bbk:Obs TIME_PERIOD="2011-06-30" OBS_VALUE="2.27841" BBK_DIFF_A="-0.16254"/>
      <bbk:Obs TIME_PERIOD="2011-06-29" OBS_VALUE="2.44095" BBK_DIFF_A="-0.41298"/>
      <bbk:Obs TIME_PERIOD="2011-06-28" OBS_VALUE="2.85393" BBK_DIFF_A="0.07348"/>
      <bbk:Obs TIME_PERIOD="2011-06-27" OBS_VALUE="2.78045" BBK_DIFF_A="0.21932"/>
      <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="2.56113" BBK_DIFF_A="0.12665"/>
      <bbk:Obs TIME_PERIOD="2011-06-23" OBS_VALUE="2.43448" BBK_DIFF_A="-0.04951"/>
      <bbk:Obs TIME_PERIOD="2011-06-22" OBS_VALUE="2.48399" BBK_DIFF_A="-0.14182"/>
      <bbk:Obs TIME_PERIOD="2011-06-21" OBS_VALUE="2.62581" BBK_DIFF_A="-0.16877"/>
      <bbk:Obs TIME_PERIOD="2011-06-20" OBS_VALUE="2.79458" BBK_DIFF_A="-0.14144"/>
      <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="2.93602" BBK_DIFF_A="-0.02569"/>
      <bbk:Obs TIME_PERIOD="2011-06-16" OBS_VALUE="2.96171" BBK_DIFF_A="0.43813"/>
      <bbk:Obs TIME_PERIOD="2011-06-15" OBS_VALUE="2.52358" BBK_DIFF_A="0.04999"/>
      <bbk:Obs TIME_PERIOD="2011-06-14" OBS_VALUE="2.47359" BBK_DIFF_A="0.21868"/>
      <bbk:Obs TIME_PERIOD="2011-06-13" OBS_VALUE="2.25491" BBK_DIFF_A="0.10069"/>
      <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="2.15422" BBK_DIFF_A="-0.11515"/>
      <bbk:Obs TIME_PERIOD="2011-06-09" OBS_VALUE="2.26937" BBK_DIFF_A="0.05115"/>
      <bbk:Obs TIME_PERIOD="2011-06-08" OBS_VALUE="2.21822" BBK_DIFF_A="-0.03587"/>
      <bbk:Obs TIME_PERIOD="2011-06-07" OBS_VALUE="2.25409" BBK_DIFF_A="0.10063"/>
      <bbk:Obs TIME_PERIOD="2011-06-06" OBS_VALUE="2.15346" BBK_DIFF_A="0.10533"/>
      <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="2.04813" BBK_DIFF_A="-0.15965"/>
      <bbk:Obs TIME_PERIOD="2011-06-02" OBS_VALUE="2.20778" BBK_DIFF_A="-0.1791"/>
      <bbk:Obs TIME_PERIOD="2011-06-01" OBS_VALUE="2.38688" BBK_DIFF_A="0.03933"/>
      <bbk:Obs TIME_PERIOD="2011-05-31" OBS_VALUE="2.34755" BBK_DIFF_A="0.11109"/>
      <bbk:Obs TIME_PERIOD="2011-05-30" OBS_VALUE="2.23646" BBK_DIFF_A="0.21957"/>
      <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="2.01689" BBK_DIFF_A="-0.07677"/>
      <bbk:Obs TIME_PERIOD="2011-05-26" OBS_VALUE="2.09366" BBK_DIFF_A="-0.13023"/>
      <bbk:Obs TIME_PERIOD="2011-05-25" OBS_VALUE="2.22389" BBK_DIFF_A="0.25319"/>
      <bbk:Obs TIME_PERIOD="2011-05-24" OBS_VALUE="1.9707" BBK_DIFF_A="0.00178"/>
      <bbk:Obs TIME_PERIOD="2011-05-23" OBS_VALUE="1.96892" BBK_DIFF_A="0.14674"/>
      <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="1.82218" BBK_DIFF_A="-0.07211"/>
      <bbk:Obs TIME_PERIOD="2011-05-19" OBS_VALUE="1.89429" BBK_DIFF_A="0.11642"/>
      <bbk:Obs TIME_PERIOD="2011-05-18" OBS_VALUE="1.77787" BBK_DIFF_A="0.13314"/>
      <bbk:Obs TIME_PERIOD="2011-05-17" OBS_VALUE="1.64473" BBK_DIFF_A="-0.14497"/>
      <bbk:Obs TIME_PERIOD="2011-05-16" OBS_VALUE="1.7897" BBK_DIFF_A="0.16936"/>
      <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="1.62034" BBK_DIFF_A="-0.01065"/>
      <bbk:Obs TIME_PERIOD="2011-05-12" OBS_VALUE="1.63099" BBK_DIFF_A="21.63099"/>
      <bbk:Obs TIME_PERIOD="2011-05-11" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2011-05-10" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2011-05-09" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <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="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2011-05-05" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2011-05-04" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2011-05-03" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2011-05-02" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <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="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2011-04-28" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2011-04-27" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2011-04-26" OBS_VALUE="-20.0" BBK_DIFF_A="-14.30582"/>
      <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="-5.69418" BBK_DIFF_A="-0.01523"/>
      <bbk:Obs TIME_PERIOD="2011-04-20" OBS_VALUE="-5.67895" BBK_DIFF_A="14.32105"/>
      <bbk:Obs TIME_PERIOD="2011-04-19" OBS_VALUE="-20.0" BBK_DIFF_A="-14.87946"/>
      <bbk:Obs TIME_PERIOD="2011-04-18" OBS_VALUE="-5.12054" BBK_DIFF_A="-0.01181"/>
      <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="-5.10873" BBK_DIFF_A="-0.02712"/>
      <bbk:Obs TIME_PERIOD="2011-04-14" OBS_VALUE="-5.08161" BBK_DIFF_A="-0.30064"/>
      <bbk:Obs TIME_PERIOD="2011-04-13" OBS_VALUE="-4.78097" BBK_DIFF_A="0.16372"/>
      <bbk:Obs TIME_PERIOD="2011-04-12" OBS_VALUE="-4.94469" BBK_DIFF_A="0.06074"/>
      <bbk:Obs TIME_PERIOD="2011-04-11" OBS_VALUE="-5.00543" BBK_DIFF_A="0.61375"/>
      <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="-5.61918" BBK_DIFF_A="-0.37688"/>
      <bbk:Obs TIME_PERIOD="2011-04-07" OBS_VALUE="-5.2423" BBK_DIFF_A="14.7577"/>
      <bbk:Obs TIME_PERIOD="2011-04-06" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2011-04-05" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2011-04-04" OBS_VALUE="-20.0" BBK_DIFF_A="-14.23944"/>
      <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="-5.76056" BBK_DIFF_A="-0.0948"/>
      <bbk:Obs TIME_PERIOD="2011-03-31" OBS_VALUE="-5.66576" BBK_DIFF_A="-0.25574"/>
      <bbk:Obs TIME_PERIOD="2011-03-30" OBS_VALUE="-5.41002" BBK_DIFF_A="0.19222"/>
      <bbk:Obs TIME_PERIOD="2011-03-29" OBS_VALUE="-5.60224" BBK_DIFF_A="-0.21142"/>
      <bbk:Obs TIME_PERIOD="2011-03-28" OBS_VALUE="-5.39082" BBK_DIFF_A="0.23478"/>
      <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="-5.6256" BBK_DIFF_A="0.06257"/>
      <bbk:Obs TIME_PERIOD="2011-03-24" OBS_VALUE="-5.68817" BBK_DIFF_A="0.2528"/>
      <bbk:Obs TIME_PERIOD="2011-03-23" OBS_VALUE="-5.94097" BBK_DIFF_A="-0.02904"/>
      <bbk:Obs TIME_PERIOD="2011-03-22" OBS_VALUE="-5.91193" BBK_DIFF_A="-0.21393"/>
      <bbk:Obs TIME_PERIOD="2011-03-21" OBS_VALUE="-5.698" BBK_DIFF_A="14.302"/>
      <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="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2011-03-17" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2011-03-16" OBS_VALUE="-20.0" BBK_DIFF_A="-13.59692"/>
      <bbk:Obs TIME_PERIOD="2011-03-15" OBS_VALUE="-6.40308" BBK_DIFF_A="-7.9673"/>
      <bbk:Obs TIME_PERIOD="2011-03-14" OBS_VALUE="1.56422" BBK_DIFF_A="-0.17683"/>
      <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="1.74105" BBK_DIFF_A="-0.46161"/>
      <bbk:Obs TIME_PERIOD="2011-03-10" OBS_VALUE="2.20266" BBK_DIFF_A="-0.09391"/>
      <bbk:Obs TIME_PERIOD="2011-03-09" OBS_VALUE="2.29657" BBK_DIFF_A="0.06295"/>
      <bbk:Obs TIME_PERIOD="2011-03-08" OBS_VALUE="2.23362" BBK_DIFF_A="-0.1239"/>
      <bbk:Obs TIME_PERIOD="2011-03-07" OBS_VALUE="2.35752" BBK_DIFF_A="-0.0743"/>
      <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="2.43182" BBK_DIFF_A="0.71207"/>
      <bbk:Obs TIME_PERIOD="2011-03-03" OBS_VALUE="1.71975" BBK_DIFF_A="0.09074"/>
      <bbk:Obs TIME_PERIOD="2011-03-02" OBS_VALUE="1.62901" BBK_DIFF_A="-0.07072"/>
      <bbk:Obs TIME_PERIOD="2011-03-01" OBS_VALUE="1.69973" BBK_DIFF_A="0.05205"/>
      <bbk:Obs TIME_PERIOD="2011-02-28" OBS_VALUE="1.64768" BBK_DIFF_A="-0.01148"/>
      <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="1.65916" BBK_DIFF_A="0.02192"/>
      <bbk:Obs TIME_PERIOD="2011-02-24" OBS_VALUE="1.63724" BBK_DIFF_A="0.05593"/>
      <bbk:Obs TIME_PERIOD="2011-02-23" OBS_VALUE="1.58131" BBK_DIFF_A="0.20738"/>
      <bbk:Obs TIME_PERIOD="2011-02-22" OBS_VALUE="1.37393" BBK_DIFF_A="-0.26066"/>
      <bbk:Obs TIME_PERIOD="2011-02-21" OBS_VALUE="1.63459" BBK_DIFF_A="0.18256"/>
      <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="1.45203" BBK_DIFF_A="-0.20949"/>
      <bbk:Obs TIME_PERIOD="2011-02-17" OBS_VALUE="1.66152" BBK_DIFF_A="-0.17572"/>
      <bbk:Obs TIME_PERIOD="2011-02-16" OBS_VALUE="1.83724" BBK_DIFF_A="-0.05126"/>
      <bbk:Obs TIME_PERIOD="2011-02-15" OBS_VALUE="1.8885" BBK_DIFF_A="0.08067"/>
      <bbk:Obs TIME_PERIOD="2011-02-14" OBS_VALUE="1.80783" BBK_DIFF_A="-0.11923"/>
      <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="1.92706" BBK_DIFF_A="0.13145"/>
      <bbk:Obs TIME_PERIOD="2011-02-10" OBS_VALUE="1.79561" BBK_DIFF_A="21.79561"/>
      <bbk:Obs TIME_PERIOD="2011-02-09" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2011-02-08" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2011-02-07" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <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="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2011-02-03" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2011-02-02" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2011-02-01" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2011-01-31" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <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="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2011-01-27" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2011-01-26" OBS_VALUE="-20.0" BBK_DIFF_A="-12.13939"/>
      <bbk:Obs TIME_PERIOD="2011-01-25" OBS_VALUE="-7.86061" BBK_DIFF_A="-0.5567"/>
      <bbk:Obs TIME_PERIOD="2011-01-24" OBS_VALUE="-7.30391" BBK_DIFF_A="-1.28517"/>
      <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="-6.01874" BBK_DIFF_A="-0.78609"/>
      <bbk:Obs TIME_PERIOD="2011-01-20" OBS_VALUE="-5.23265" BBK_DIFF_A="-0.09605"/>
      <bbk:Obs TIME_PERIOD="2011-01-19" OBS_VALUE="-5.1366" BBK_DIFF_A="0.42865"/>
      <bbk:Obs TIME_PERIOD="2011-01-18" OBS_VALUE="-5.56525" BBK_DIFF_A="0.90267"/>
      <bbk:Obs TIME_PERIOD="2011-01-17" OBS_VALUE="-6.46792" BBK_DIFF_A="-17.62145"/>
      <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="11.15353" BBK_DIFF_A="9.184"/>
      <bbk:Obs TIME_PERIOD="2011-01-13" OBS_VALUE="1.96953" BBK_DIFF_A="0.16952"/>
      <bbk:Obs TIME_PERIOD="2011-01-12" OBS_VALUE="1.80001" BBK_DIFF_A="-0.19012"/>
      <bbk:Obs TIME_PERIOD="2011-01-11" OBS_VALUE="1.99013" BBK_DIFF_A="-0.05631"/>
      <bbk:Obs TIME_PERIOD="2011-01-10" OBS_VALUE="2.04644" BBK_DIFF_A="-0.14926"/>
      <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="2.1957" BBK_DIFF_A="-0.55142"/>
      <bbk:Obs TIME_PERIOD="2011-01-06" OBS_VALUE="2.74712" BBK_DIFF_A="0.0653"/>
      <bbk:Obs TIME_PERIOD="2011-01-05" OBS_VALUE="2.68182" BBK_DIFF_A="0.04107"/>
      <bbk:Obs TIME_PERIOD="2011-01-04" OBS_VALUE="2.64075" BBK_DIFF_A="-0.25803"/>
      <bbk:Obs TIME_PERIOD="2011-01-03" OBS_VALUE="2.89878" BBK_DIFF_A="0.18505"/>
      <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="2.71373" BBK_DIFF_A="0.14419"/>
      <bbk:Obs TIME_PERIOD="2010-12-29" OBS_VALUE="2.56954" BBK_DIFF_A="0.57047"/>
      <bbk:Obs TIME_PERIOD="2010-12-28" OBS_VALUE="1.99907" BBK_DIFF_A="-0.30026"/>
      <bbk:Obs TIME_PERIOD="2010-12-27" OBS_VALUE="2.29933" BBK_DIFF_A="0.24088"/>
      <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="2.05845" BBK_DIFF_A="0.61813"/>
      <bbk:Obs TIME_PERIOD="2010-12-22" OBS_VALUE="1.44032" BBK_DIFF_A="-0.45196"/>
      <bbk:Obs TIME_PERIOD="2010-12-21" OBS_VALUE="1.89228" BBK_DIFF_A="-0.20053"/>
      <bbk:Obs TIME_PERIOD="2010-12-20" OBS_VALUE="2.09281" BBK_DIFF_A="-0.25362"/>
      <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="2.34643" BBK_DIFF_A="0.03702"/>
      <bbk:Obs TIME_PERIOD="2010-12-16" OBS_VALUE="2.30941" BBK_DIFF_A="-0.23177"/>
      <bbk:Obs TIME_PERIOD="2010-12-15" OBS_VALUE="2.54118" BBK_DIFF_A="0.19526"/>
      <bbk:Obs TIME_PERIOD="2010-12-14" OBS_VALUE="2.34592" BBK_DIFF_A="0.04672"/>
      <bbk:Obs TIME_PERIOD="2010-12-13" OBS_VALUE="2.2992" BBK_DIFF_A="1.1039"/>
      <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="1.1953" BBK_DIFF_A="0.05015"/>
      <bbk:Obs TIME_PERIOD="2010-12-09" OBS_VALUE="1.14515" BBK_DIFF_A="-0.21941"/>
      <bbk:Obs TIME_PERIOD="2010-12-08" OBS_VALUE="1.36456" BBK_DIFF_A="-0.28647"/>
      <bbk:Obs TIME_PERIOD="2010-12-07" OBS_VALUE="1.65103" BBK_DIFF_A="-1.42694"/>
      <bbk:Obs TIME_PERIOD="2010-12-06" OBS_VALUE="3.07797" BBK_DIFF_A="0.24521"/>
      <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="2.83276" BBK_DIFF_A="-0.1299"/>
      <bbk:Obs TIME_PERIOD="2010-12-02" OBS_VALUE="2.96266" BBK_DIFF_A="0.49421"/>
      <bbk:Obs TIME_PERIOD="2010-12-01" OBS_VALUE="2.46845" BBK_DIFF_A="0.49732"/>
      <bbk:Obs TIME_PERIOD="2010-11-30" OBS_VALUE="1.97113" BBK_DIFF_A="0.39173"/>
      <bbk:Obs TIME_PERIOD="2010-11-29" OBS_VALUE="1.5794" BBK_DIFF_A="0.15581"/>
      <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="1.42359" BBK_DIFF_A="0.31055"/>
      <bbk:Obs TIME_PERIOD="2010-11-25" OBS_VALUE="1.11304" BBK_DIFF_A="-0.12792"/>
      <bbk:Obs TIME_PERIOD="2010-11-24" OBS_VALUE="1.24096" BBK_DIFF_A="0.20659"/>
      <bbk:Obs TIME_PERIOD="2010-11-23" OBS_VALUE="1.03437" BBK_DIFF_A="-0.18757"/>
      <bbk:Obs TIME_PERIOD="2010-11-22" OBS_VALUE="1.22194" BBK_DIFF_A="-0.06126"/>
      <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="1.2832" BBK_DIFF_A="0.14209"/>
      <bbk:Obs TIME_PERIOD="2010-11-18" OBS_VALUE="1.14111" BBK_DIFF_A="0.53517"/>
      <bbk:Obs TIME_PERIOD="2010-11-17" OBS_VALUE="0.60594" BBK_DIFF_A="-0.11048"/>
      <bbk:Obs TIME_PERIOD="2010-11-16" OBS_VALUE="0.71642" BBK_DIFF_A="-0.19444"/>
      <bbk:Obs TIME_PERIOD="2010-11-15" OBS_VALUE="0.91086" BBK_DIFF_A="-0.14239"/>
      <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="1.05325" BBK_DIFF_A="0.08693"/>
      <bbk:Obs TIME_PERIOD="2010-11-11" OBS_VALUE="0.96632" BBK_DIFF_A="-0.15164"/>
      <bbk:Obs TIME_PERIOD="2010-11-10" OBS_VALUE="1.11796" BBK_DIFF_A="-0.05445"/>
      <bbk:Obs TIME_PERIOD="2010-11-09" OBS_VALUE="1.17241" BBK_DIFF_A="0.114"/>
      <bbk:Obs TIME_PERIOD="2010-11-08" OBS_VALUE="1.05841" BBK_DIFF_A="-0.08344"/>
      <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="1.14185" BBK_DIFF_A="0.26989"/>
      <bbk:Obs TIME_PERIOD="2010-11-04" OBS_VALUE="0.87196" BBK_DIFF_A="0.11266"/>
      <bbk:Obs TIME_PERIOD="2010-11-03" OBS_VALUE="0.7593" BBK_DIFF_A="-0.28325"/>
      <bbk:Obs TIME_PERIOD="2010-11-02" OBS_VALUE="1.04255" BBK_DIFF_A="0.05116"/>
      <bbk:Obs TIME_PERIOD="2010-11-01" OBS_VALUE="0.99139" BBK_DIFF_A="0.01621"/>
      <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="0.97518" BBK_DIFF_A="-0.37738"/>
      <bbk:Obs TIME_PERIOD="2010-10-28" OBS_VALUE="1.35256" BBK_DIFF_A="0.73191"/>
      <bbk:Obs TIME_PERIOD="2010-10-27" OBS_VALUE="0.62065" BBK_DIFF_A="0.09073"/>
      <bbk:Obs TIME_PERIOD="2010-10-26" OBS_VALUE="0.52992" BBK_DIFF_A="-0.62174"/>
      <bbk:Obs TIME_PERIOD="2010-10-25" OBS_VALUE="1.15166" BBK_DIFF_A="-0.25074"/>
      <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="1.4024" BBK_DIFF_A="0.0125"/>
      <bbk:Obs TIME_PERIOD="2010-10-21" OBS_VALUE="1.3899" BBK_DIFF_A="-0.01371"/>
      <bbk:Obs TIME_PERIOD="2010-10-20" OBS_VALUE="1.40361" BBK_DIFF_A="0.16622"/>
      <bbk:Obs TIME_PERIOD="2010-10-19" OBS_VALUE="1.23739" BBK_DIFF_A="-0.31791"/>
      <bbk:Obs TIME_PERIOD="2010-10-18" OBS_VALUE="1.5553" BBK_DIFF_A="-0.22679"/>
      <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="1.78209" BBK_DIFF_A="0.08341"/>
      <bbk:Obs TIME_PERIOD="2010-10-14" OBS_VALUE="1.69868" BBK_DIFF_A="0.26507"/>
      <bbk:Obs TIME_PERIOD="2010-10-13" OBS_VALUE="1.43361" BBK_DIFF_A="0.34386"/>
      <bbk:Obs TIME_PERIOD="2010-10-12" OBS_VALUE="1.08975" BBK_DIFF_A="-0.37743"/>
      <bbk:Obs TIME_PERIOD="2010-10-11" OBS_VALUE="1.46718" BBK_DIFF_A="0.11802"/>
      <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="1.34916" BBK_DIFF_A="-0.11248"/>
      <bbk:Obs TIME_PERIOD="2010-10-07" OBS_VALUE="1.46164" BBK_DIFF_A="0.27993"/>
      <bbk:Obs TIME_PERIOD="2010-10-06" OBS_VALUE="1.18171" BBK_DIFF_A="0.6162"/>
      <bbk:Obs TIME_PERIOD="2010-10-05" OBS_VALUE="0.56551" BBK_DIFF_A="-0.50633"/>
      <bbk:Obs TIME_PERIOD="2010-10-04" OBS_VALUE="1.07184" BBK_DIFF_A="-0.0038"/>
      <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="1.07564" BBK_DIFF_A="-0.05685"/>
      <bbk:Obs TIME_PERIOD="2010-09-30" OBS_VALUE="1.13249" BBK_DIFF_A="-0.04942"/>
      <bbk:Obs TIME_PERIOD="2010-09-29" OBS_VALUE="1.18191" BBK_DIFF_A="-0.00968"/>
      <bbk:Obs TIME_PERIOD="2010-09-28" OBS_VALUE="1.19159" BBK_DIFF_A="-0.0569"/>
      <bbk:Obs TIME_PERIOD="2010-09-27" OBS_VALUE="1.24849" BBK_DIFF_A="-0.03702"/>
      <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="1.28551" BBK_DIFF_A="8.56109"/>
      <bbk:Obs TIME_PERIOD="2010-09-23" OBS_VALUE="-7.27558" BBK_DIFF_A="-5.3428"/>
      <bbk:Obs TIME_PERIOD="2010-09-22" OBS_VALUE="-1.93278" BBK_DIFF_A="6.34732"/>
      <bbk:Obs TIME_PERIOD="2010-09-21" OBS_VALUE="-8.2801" BBK_DIFF_A="-0.08134"/>
      <bbk:Obs TIME_PERIOD="2010-09-20" OBS_VALUE="-8.19876" BBK_DIFF_A="-7.26217"/>
      <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="-0.93659" BBK_DIFF_A="-1.36613"/>
      <bbk:Obs TIME_PERIOD="2010-09-16" OBS_VALUE="0.42954" BBK_DIFF_A="-0.71836"/>
      <bbk:Obs TIME_PERIOD="2010-09-15" OBS_VALUE="1.1479" BBK_DIFF_A="-0.30348"/>
      <bbk:Obs TIME_PERIOD="2010-09-14" OBS_VALUE="1.45138" BBK_DIFF_A="0.23826"/>
      <bbk:Obs TIME_PERIOD="2010-09-13" OBS_VALUE="1.21312" BBK_DIFF_A="-0.54032"/>
      <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="1.75344" BBK_DIFF_A="-0.1798"/>
      <bbk:Obs TIME_PERIOD="2010-09-09" OBS_VALUE="1.93324" BBK_DIFF_A="-0.30803"/>
      <bbk:Obs TIME_PERIOD="2010-09-08" OBS_VALUE="2.24127" BBK_DIFF_A="0.30167"/>
      <bbk:Obs TIME_PERIOD="2010-09-07" OBS_VALUE="1.9396" BBK_DIFF_A="0.31978"/>
      <bbk:Obs TIME_PERIOD="2010-09-06" OBS_VALUE="1.61982" BBK_DIFF_A="-0.07744"/>
      <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="1.69726" BBK_DIFF_A="-0.06296"/>
      <bbk:Obs TIME_PERIOD="2010-09-02" OBS_VALUE="1.76022" BBK_DIFF_A="-0.5369"/>
      <bbk:Obs TIME_PERIOD="2010-09-01" OBS_VALUE="2.29712" BBK_DIFF_A="-0.05734"/>
      <bbk:Obs TIME_PERIOD="2010-08-31" OBS_VALUE="2.35446" BBK_DIFF_A="-0.07966"/>
      <bbk:Obs TIME_PERIOD="2010-08-30" OBS_VALUE="2.43412" BBK_DIFF_A="0.18682"/>
      <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="2.2473" BBK_DIFF_A="1.05323"/>
      <bbk:Obs TIME_PERIOD="2010-08-26" OBS_VALUE="1.19407" BBK_DIFF_A="-0.22182"/>
      <bbk:Obs TIME_PERIOD="2010-08-25" OBS_VALUE="1.41589" BBK_DIFF_A="-0.29811"/>
      <bbk:Obs TIME_PERIOD="2010-08-24" OBS_VALUE="1.714" BBK_DIFF_A="-0.36119"/>
      <bbk:Obs TIME_PERIOD="2010-08-23" OBS_VALUE="2.07519" BBK_DIFF_A="0.00923"/>
      <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="2.06596" BBK_DIFF_A="-0.08734"/>
      <bbk:Obs TIME_PERIOD="2010-08-19" OBS_VALUE="2.1533" BBK_DIFF_A="-0.39329"/>
      <bbk:Obs TIME_PERIOD="2010-08-18" OBS_VALUE="2.54659" BBK_DIFF_A="0.02469"/>
      <bbk:Obs TIME_PERIOD="2010-08-17" OBS_VALUE="2.5219" BBK_DIFF_A="4.24716"/>
      <bbk:Obs TIME_PERIOD="2010-08-16" OBS_VALUE="-1.72526" BBK_DIFF_A="8.8E-4"/>
      <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="-1.72614" BBK_DIFF_A="-0.02638"/>
      <bbk:Obs TIME_PERIOD="2010-08-12" OBS_VALUE="-1.69976" BBK_DIFF_A="4.04333"/>
      <bbk:Obs TIME_PERIOD="2010-08-11" OBS_VALUE="-5.74309" BBK_DIFF_A="0.25635"/>
      <bbk:Obs TIME_PERIOD="2010-08-10" OBS_VALUE="-5.99944" BBK_DIFF_A="-0.41833"/>
      <bbk:Obs TIME_PERIOD="2010-08-09" OBS_VALUE="-5.58111" BBK_DIFF_A="-0.62151"/>
      <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="-4.9596" BBK_DIFF_A="-0.09621"/>
      <bbk:Obs TIME_PERIOD="2010-08-05" OBS_VALUE="-4.86339" BBK_DIFF_A="0.40582"/>
      <bbk:Obs TIME_PERIOD="2010-08-04" OBS_VALUE="-5.26921" BBK_DIFF_A="0.3628"/>
      <bbk:Obs TIME_PERIOD="2010-08-03" OBS_VALUE="-5.63201" BBK_DIFF_A="0.2678"/>
      <bbk:Obs TIME_PERIOD="2010-08-02" OBS_VALUE="-5.89981" BBK_DIFF_A="0.36701"/>
      <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="-6.26682" BBK_DIFF_A="-7.8445"/>
      <bbk:Obs TIME_PERIOD="2010-07-29" OBS_VALUE="1.57768" BBK_DIFF_A="-0.05256"/>
      <bbk:Obs TIME_PERIOD="2010-07-28" OBS_VALUE="1.63024" BBK_DIFF_A="-0.18406"/>
      <bbk:Obs TIME_PERIOD="2010-07-27" OBS_VALUE="1.8143" BBK_DIFF_A="-0.88039"/>
      <bbk:Obs TIME_PERIOD="2010-07-26" OBS_VALUE="2.69469" BBK_DIFF_A="-0.20796"/>
      <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="2.90265" BBK_DIFF_A="0.06598"/>
      <bbk:Obs TIME_PERIOD="2010-07-22" OBS_VALUE="2.83667" BBK_DIFF_A="0.67795"/>
      <bbk:Obs TIME_PERIOD="2010-07-21" OBS_VALUE="2.15872" BBK_DIFF_A="0.06006"/>
      <bbk:Obs TIME_PERIOD="2010-07-20" OBS_VALUE="2.09866" BBK_DIFF_A="0.27033"/>
      <bbk:Obs TIME_PERIOD="2010-07-19" OBS_VALUE="1.82833" BBK_DIFF_A="-0.29688"/>
      <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="2.12521" BBK_DIFF_A="0.20304"/>
      <bbk:Obs TIME_PERIOD="2010-07-15" OBS_VALUE="1.92217" BBK_DIFF_A="0.733"/>
      <bbk:Obs TIME_PERIOD="2010-07-14" OBS_VALUE="1.18917" BBK_DIFF_A="-0.71928"/>
      <bbk:Obs TIME_PERIOD="2010-07-13" OBS_VALUE="1.90845" BBK_DIFF_A="0.09205"/>
      <bbk:Obs TIME_PERIOD="2010-07-12" OBS_VALUE="1.8164" BBK_DIFF_A="0.16471"/>
      <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="1.65169" BBK_DIFF_A="0.05239"/>
      <bbk:Obs TIME_PERIOD="2010-07-08" OBS_VALUE="1.5993" BBK_DIFF_A="-0.27809"/>
      <bbk:Obs TIME_PERIOD="2010-07-07" OBS_VALUE="1.87739" BBK_DIFF_A="-0.02565"/>
      <bbk:Obs TIME_PERIOD="2010-07-06" OBS_VALUE="1.90304" BBK_DIFF_A="0.10653"/>
      <bbk:Obs TIME_PERIOD="2010-07-05" OBS_VALUE="1.79651" BBK_DIFF_A="0.02063"/>
      <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="1.77588" BBK_DIFF_A="-0.34707"/>
      <bbk:Obs TIME_PERIOD="2010-07-01" OBS_VALUE="2.12295" BBK_DIFF_A="-0.52166"/>
      <bbk:Obs TIME_PERIOD="2010-06-30" OBS_VALUE="2.64461" BBK_DIFF_A="0.29726"/>
      <bbk:Obs TIME_PERIOD="2010-06-29" OBS_VALUE="2.34735" BBK_DIFF_A="-0.23193"/>
      <bbk:Obs TIME_PERIOD="2010-06-28" OBS_VALUE="2.57928" BBK_DIFF_A="-0.32569"/>
      <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="2.90497" BBK_DIFF_A="0.27234"/>
      <bbk:Obs TIME_PERIOD="2010-06-24" OBS_VALUE="2.63263" BBK_DIFF_A="0.12242"/>
      <bbk:Obs TIME_PERIOD="2010-06-23" OBS_VALUE="2.51021" BBK_DIFF_A="0.50212"/>
      <bbk:Obs TIME_PERIOD="2010-06-22" OBS_VALUE="2.00809" BBK_DIFF_A="-0.87421"/>
      <bbk:Obs TIME_PERIOD="2010-06-21" OBS_VALUE="2.8823" BBK_DIFF_A="-0.17249"/>
      <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="3.05479" BBK_DIFF_A="0.16097"/>
      <bbk:Obs TIME_PERIOD="2010-06-17" OBS_VALUE="2.89382" BBK_DIFF_A="-0.17222"/>
      <bbk:Obs TIME_PERIOD="2010-06-16" OBS_VALUE="3.06604" BBK_DIFF_A="-0.08236"/>
      <bbk:Obs TIME_PERIOD="2010-06-15" OBS_VALUE="3.1484" BBK_DIFF_A="0.08648"/>
      <bbk:Obs TIME_PERIOD="2010-06-14" OBS_VALUE="3.06192" BBK_DIFF_A="-0.29638"/>
      <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="3.3583" BBK_DIFF_A="0.62613"/>
      <bbk:Obs TIME_PERIOD="2010-06-10" OBS_VALUE="2.73217" BBK_DIFF_A="-0.26419"/>
      <bbk:Obs TIME_PERIOD="2010-06-09" OBS_VALUE="2.99636" BBK_DIFF_A="0.04026"/>
      <bbk:Obs TIME_PERIOD="2010-06-08" OBS_VALUE="2.9561" BBK_DIFF_A="0.3973"/>
      <bbk:Obs TIME_PERIOD="2010-06-07" OBS_VALUE="2.5588" BBK_DIFF_A="0.09649"/>
      <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="2.46231" BBK_DIFF_A="-0.1818"/>
      <bbk:Obs TIME_PERIOD="2010-06-03" OBS_VALUE="2.64411" BBK_DIFF_A="0.7632"/>
      <bbk:Obs TIME_PERIOD="2010-06-02" OBS_VALUE="1.88091" BBK_DIFF_A="-0.68847"/>
      <bbk:Obs TIME_PERIOD="2010-06-01" OBS_VALUE="2.56938" BBK_DIFF_A="-0.03421"/>
      <bbk:Obs TIME_PERIOD="2010-05-31" OBS_VALUE="2.60359" BBK_DIFF_A="-0.49561"/>
      <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="3.0992" BBK_DIFF_A="-2.1E-4"/>
      <bbk:Obs TIME_PERIOD="2010-05-27" OBS_VALUE="3.09941" BBK_DIFF_A="0.27389"/>
      <bbk:Obs TIME_PERIOD="2010-05-26" OBS_VALUE="2.82552" BBK_DIFF_A="-0.33883"/>
      <bbk:Obs TIME_PERIOD="2010-05-25" OBS_VALUE="3.16435" BBK_DIFF_A="-0.65162"/>
      <bbk:Obs TIME_PERIOD="2010-05-24" OBS_VALUE="3.81597" BBK_DIFF_A="-0.09052"/>
      <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="3.90649" BBK_DIFF_A="0.0093"/>
      <bbk:Obs TIME_PERIOD="2010-05-20" OBS_VALUE="3.89719" BBK_DIFF_A="0.06999"/>
      <bbk:Obs TIME_PERIOD="2010-05-19" OBS_VALUE="3.8272" BBK_DIFF_A="-0.40862"/>
      <bbk:Obs TIME_PERIOD="2010-05-18" OBS_VALUE="4.23582" BBK_DIFF_A="-0.20575"/>
      <bbk:Obs TIME_PERIOD="2010-05-17" OBS_VALUE="4.44157" BBK_DIFF_A="0.07842"/>
      <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="4.36315" BBK_DIFF_A="0.12832"/>
      <bbk:Obs TIME_PERIOD="2010-05-13" OBS_VALUE="4.23483" BBK_DIFF_A="-0.00478"/>
      <bbk:Obs TIME_PERIOD="2010-05-12" OBS_VALUE="4.23961" BBK_DIFF_A="0.07113"/>
      <bbk:Obs TIME_PERIOD="2010-05-11" OBS_VALUE="4.16848" BBK_DIFF_A="0.15162"/>
      <bbk:Obs TIME_PERIOD="2010-05-10" OBS_VALUE="4.01686" BBK_DIFF_A="-0.47859"/>
      <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="4.49545" BBK_DIFF_A="0.4989"/>
      <bbk:Obs TIME_PERIOD="2010-05-06" OBS_VALUE="3.99655" BBK_DIFF_A="0.69236"/>
      <bbk:Obs TIME_PERIOD="2010-05-05" OBS_VALUE="3.30419" BBK_DIFF_A="0.53097"/>
      <bbk:Obs TIME_PERIOD="2010-05-04" OBS_VALUE="2.77322" BBK_DIFF_A="-0.27743"/>
      <bbk:Obs TIME_PERIOD="2010-05-03" OBS_VALUE="3.05065" BBK_DIFF_A="-0.03979"/>
      <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="3.09044" BBK_DIFF_A="0.42054"/>
      <bbk:Obs TIME_PERIOD="2010-04-29" OBS_VALUE="2.6699" BBK_DIFF_A="0.80925"/>
      <bbk:Obs TIME_PERIOD="2010-04-28" OBS_VALUE="1.86065" BBK_DIFF_A="-0.44186"/>
      <bbk:Obs TIME_PERIOD="2010-04-27" OBS_VALUE="2.30251" BBK_DIFF_A="0.19801"/>
      <bbk:Obs TIME_PERIOD="2010-04-26" OBS_VALUE="2.1045" BBK_DIFF_A="7.28244"/>
      <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="-5.17794" BBK_DIFF_A="-0.05051"/>
      <bbk:Obs TIME_PERIOD="2010-04-22" OBS_VALUE="-5.12743" BBK_DIFF_A="0.49912"/>
      <bbk:Obs TIME_PERIOD="2010-04-21" OBS_VALUE="-5.62655" BBK_DIFF_A="0.26866"/>
      <bbk:Obs TIME_PERIOD="2010-04-20" OBS_VALUE="-5.89521" BBK_DIFF_A="-8.33504"/>
      <bbk:Obs TIME_PERIOD="2010-04-19" OBS_VALUE="2.43983" BBK_DIFF_A="0.50234"/>
      <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="1.93749" BBK_DIFF_A="0.18904"/>
      <bbk:Obs TIME_PERIOD="2010-04-15" OBS_VALUE="1.74845" BBK_DIFF_A="0.04069"/>
      <bbk:Obs TIME_PERIOD="2010-04-14" OBS_VALUE="1.70776" BBK_DIFF_A="-0.03917"/>
      <bbk:Obs TIME_PERIOD="2010-04-13" OBS_VALUE="1.74693" BBK_DIFF_A="0.13647"/>
      <bbk:Obs TIME_PERIOD="2010-04-12" OBS_VALUE="1.61046" BBK_DIFF_A="-0.85706"/>
      <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="2.46752" BBK_DIFF_A="0.19393"/>
      <bbk:Obs TIME_PERIOD="2010-04-08" OBS_VALUE="2.27359" BBK_DIFF_A="0.10633"/>
      <bbk:Obs TIME_PERIOD="2010-04-07" OBS_VALUE="2.16726" BBK_DIFF_A="0.3276"/>
      <bbk:Obs TIME_PERIOD="2010-04-06" OBS_VALUE="1.83966" BBK_DIFF_A="-0.22835"/>
      <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="2.06801" BBK_DIFF_A="-0.33334"/>
      <bbk:Obs TIME_PERIOD="2010-03-31" OBS_VALUE="2.40135" BBK_DIFF_A="0.18335"/>
      <bbk:Obs TIME_PERIOD="2010-03-30" OBS_VALUE="2.218" BBK_DIFF_A="0.1713"/>
      <bbk:Obs TIME_PERIOD="2010-03-29" OBS_VALUE="2.0467" BBK_DIFF_A="-0.04143"/>
      <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="2.08813" BBK_DIFF_A="-0.35647"/>
      <bbk:Obs TIME_PERIOD="2010-03-25" OBS_VALUE="2.4446" BBK_DIFF_A="0.22159"/>
      <bbk:Obs TIME_PERIOD="2010-03-24" OBS_VALUE="2.22301" BBK_DIFF_A="0.18021"/>
      <bbk:Obs TIME_PERIOD="2010-03-23" OBS_VALUE="2.0428" BBK_DIFF_A="-0.28659"/>
      <bbk:Obs TIME_PERIOD="2010-03-22" OBS_VALUE="2.32939" BBK_DIFF_A="3.83743"/>
      <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="-1.50804" BBK_DIFF_A="-0.26159"/>
      <bbk:Obs TIME_PERIOD="2010-03-18" OBS_VALUE="-1.24645" BBK_DIFF_A="0.04317"/>
      <bbk:Obs TIME_PERIOD="2010-03-17" OBS_VALUE="-1.28962" BBK_DIFF_A="-3.04052"/>
      <bbk:Obs TIME_PERIOD="2010-03-16" OBS_VALUE="1.7509" BBK_DIFF_A="0.29217"/>
      <bbk:Obs TIME_PERIOD="2010-03-15" OBS_VALUE="1.45873" BBK_DIFF_A="-0.44366"/>
      <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="1.90239" BBK_DIFF_A="-0.26176"/>
      <bbk:Obs TIME_PERIOD="2010-03-11" OBS_VALUE="2.16415" BBK_DIFF_A="0.24174"/>
      <bbk:Obs TIME_PERIOD="2010-03-10" OBS_VALUE="1.92241" BBK_DIFF_A="-0.73979"/>
      <bbk:Obs TIME_PERIOD="2010-03-09" OBS_VALUE="2.6622" BBK_DIFF_A="-0.12"/>
      <bbk:Obs TIME_PERIOD="2010-03-08" OBS_VALUE="2.7822" BBK_DIFF_A="-0.01995"/>
      <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="2.80215" BBK_DIFF_A="-0.27935"/>
      <bbk:Obs TIME_PERIOD="2010-03-04" OBS_VALUE="3.0815" BBK_DIFF_A="-0.09553"/>
      <bbk:Obs TIME_PERIOD="2010-03-03" OBS_VALUE="3.17703" BBK_DIFF_A="-0.13453"/>
      <bbk:Obs TIME_PERIOD="2010-03-02" OBS_VALUE="3.31156" BBK_DIFF_A="0.17144"/>
      <bbk:Obs TIME_PERIOD="2010-03-01" OBS_VALUE="3.14012" BBK_DIFF_A="-0.29006"/>
      <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="3.43018" BBK_DIFF_A="0.38876"/>
      <bbk:Obs TIME_PERIOD="2010-02-25" OBS_VALUE="3.04142" BBK_DIFF_A="0.13508"/>
      <bbk:Obs TIME_PERIOD="2010-02-24" OBS_VALUE="2.90634" BBK_DIFF_A="-0.08192"/>
      <bbk:Obs TIME_PERIOD="2010-02-23" OBS_VALUE="2.98826" BBK_DIFF_A="0.19943"/>
      <bbk:Obs TIME_PERIOD="2010-02-22" OBS_VALUE="2.78883" BBK_DIFF_A="-0.03913"/>
      <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="2.82796" BBK_DIFF_A="0.11867"/>
      <bbk:Obs TIME_PERIOD="2010-02-18" OBS_VALUE="2.70929" BBK_DIFF_A="-0.21929"/>
      <bbk:Obs TIME_PERIOD="2010-02-17" OBS_VALUE="2.92858" BBK_DIFF_A="0.52336"/>
      <bbk:Obs TIME_PERIOD="2010-02-16" OBS_VALUE="2.40522" BBK_DIFF_A="0.16088"/>
      <bbk:Obs TIME_PERIOD="2010-02-15" OBS_VALUE="2.24434" BBK_DIFF_A="0.04867"/>
      <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="2.19567" BBK_DIFF_A="0.58386"/>
      <bbk:Obs TIME_PERIOD="2010-02-11" OBS_VALUE="1.61181" BBK_DIFF_A="-0.42019"/>
      <bbk:Obs TIME_PERIOD="2010-02-10" OBS_VALUE="2.032" BBK_DIFF_A="0.1061"/>
      <bbk:Obs TIME_PERIOD="2010-02-09" OBS_VALUE="1.9259" BBK_DIFF_A="-0.01159"/>
      <bbk:Obs TIME_PERIOD="2010-02-08" OBS_VALUE="1.93749" BBK_DIFF_A="0.17388"/>
      <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="1.76361" BBK_DIFF_A="7.05925"/>
      <bbk:Obs TIME_PERIOD="2010-02-04" OBS_VALUE="-5.29564" BBK_DIFF_A="0.27917"/>
      <bbk:Obs TIME_PERIOD="2010-02-03" OBS_VALUE="-5.57481" BBK_DIFF_A="0.09221"/>
      <bbk:Obs TIME_PERIOD="2010-02-02" OBS_VALUE="-5.66702" BBK_DIFF_A="-0.09606"/>
      <bbk:Obs TIME_PERIOD="2010-02-01" OBS_VALUE="-5.57096" BBK_DIFF_A="-0.20642"/>
      <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="-5.36454" BBK_DIFF_A="0.1221"/>
      <bbk:Obs TIME_PERIOD="2010-01-28" OBS_VALUE="-5.48664" BBK_DIFF_A="0.30806"/>
      <bbk:Obs TIME_PERIOD="2010-01-27" OBS_VALUE="-5.7947" BBK_DIFF_A="0.0481"/>
      <bbk:Obs TIME_PERIOD="2010-01-26" OBS_VALUE="-5.8428" BBK_DIFF_A="0.17705"/>
      <bbk:Obs TIME_PERIOD="2010-01-25" OBS_VALUE="-6.01985" BBK_DIFF_A="0.09642"/>
      <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="-6.11627" BBK_DIFF_A="-0.12308"/>
      <bbk:Obs TIME_PERIOD="2010-01-21" OBS_VALUE="-5.99319" BBK_DIFF_A="0.31076"/>
      <bbk:Obs TIME_PERIOD="2010-01-20" OBS_VALUE="-6.30395" BBK_DIFF_A="-0.1527"/>
      <bbk:Obs TIME_PERIOD="2010-01-19" OBS_VALUE="-6.15125" BBK_DIFF_A="-0.09723"/>
      <bbk:Obs TIME_PERIOD="2010-01-18" OBS_VALUE="-6.05402" BBK_DIFF_A="0.07565"/>
      <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="-6.12967" BBK_DIFF_A="-0.09069"/>
      <bbk:Obs TIME_PERIOD="2010-01-14" OBS_VALUE="-6.03898" BBK_DIFF_A="0.2372"/>
      <bbk:Obs TIME_PERIOD="2010-01-13" OBS_VALUE="-6.27618" BBK_DIFF_A="-0.13351"/>
      <bbk:Obs TIME_PERIOD="2010-01-12" OBS_VALUE="-6.14267" BBK_DIFF_A="-0.59273"/>
      <bbk:Obs TIME_PERIOD="2010-01-11" OBS_VALUE="-5.54994" BBK_DIFF_A="0.19002"/>
      <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="-5.73996" BBK_DIFF_A="-0.093"/>
      <bbk:Obs TIME_PERIOD="2010-01-07" OBS_VALUE="-5.64696" BBK_DIFF_A="-0.28372"/>
      <bbk:Obs TIME_PERIOD="2010-01-06" OBS_VALUE="-5.36324" BBK_DIFF_A="0.25324"/>
      <bbk:Obs TIME_PERIOD="2010-01-05" OBS_VALUE="-5.61648" BBK_DIFF_A="0.02975"/>
      <bbk:Obs TIME_PERIOD="2010-01-04" OBS_VALUE="-5.64623" BBK_DIFF_A="-0.19156"/>
      <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="-5.45467" BBK_DIFF_A="-0.56565"/>
      <bbk:Obs TIME_PERIOD="2009-12-29" OBS_VALUE="-4.88902" BBK_DIFF_A="0.19632"/>
      <bbk:Obs TIME_PERIOD="2009-12-28" OBS_VALUE="-5.08534" BBK_DIFF_A="0.04362"/>
      <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="-5.12896" BBK_DIFF_A="0.16549"/>
      <bbk:Obs TIME_PERIOD="2009-12-22" OBS_VALUE="-5.29445" BBK_DIFF_A="0.5236"/>
      <bbk:Obs TIME_PERIOD="2009-12-21" OBS_VALUE="-5.81805" BBK_DIFF_A="0.24418"/>
      <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="-6.06223" BBK_DIFF_A="0.1531"/>
      <bbk:Obs TIME_PERIOD="2009-12-17" OBS_VALUE="-6.21533" BBK_DIFF_A="0.15625"/>
      <bbk:Obs TIME_PERIOD="2009-12-16" OBS_VALUE="-6.37158" BBK_DIFF_A="0.97664"/>
      <bbk:Obs TIME_PERIOD="2009-12-15" OBS_VALUE="-7.34822" BBK_DIFF_A="1.32112"/>
      <bbk:Obs TIME_PERIOD="2009-12-14" OBS_VALUE="-8.66934" BBK_DIFF_A="0.13773"/>
      <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="-8.80707" BBK_DIFF_A="0.21322"/>
      <bbk:Obs TIME_PERIOD="2009-12-10" OBS_VALUE="-9.02029" BBK_DIFF_A="-0.07467"/>
      <bbk:Obs TIME_PERIOD="2009-12-09" OBS_VALUE="-8.94562" BBK_DIFF_A="-0.1413"/>
      <bbk:Obs TIME_PERIOD="2009-12-08" OBS_VALUE="-8.80432" BBK_DIFF_A="-0.08537"/>
      <bbk:Obs TIME_PERIOD="2009-12-07" OBS_VALUE="-8.71895" BBK_DIFF_A="-0.15151"/>
      <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="-8.56744" BBK_DIFF_A="-0.04586"/>
      <bbk:Obs TIME_PERIOD="2009-12-03" OBS_VALUE="-8.52158" BBK_DIFF_A="0.03138"/>
      <bbk:Obs TIME_PERIOD="2009-12-02" OBS_VALUE="-8.55296" BBK_DIFF_A="-0.11067"/>
      <bbk:Obs TIME_PERIOD="2009-12-01" OBS_VALUE="-8.44229" BBK_DIFF_A="0.16661"/>
      <bbk:Obs TIME_PERIOD="2009-11-30" OBS_VALUE="-8.6089" BBK_DIFF_A="-0.01805"/>
      <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="-8.59085" BBK_DIFF_A="-0.12113"/>
      <bbk:Obs TIME_PERIOD="2009-11-26" OBS_VALUE="-8.46972" BBK_DIFF_A="0.01203"/>
      <bbk:Obs TIME_PERIOD="2009-11-25" OBS_VALUE="-8.48175" BBK_DIFF_A="0.04942"/>
      <bbk:Obs TIME_PERIOD="2009-11-24" OBS_VALUE="-8.53117" BBK_DIFF_A="-0.15466"/>
      <bbk:Obs TIME_PERIOD="2009-11-23" OBS_VALUE="-8.37651" BBK_DIFF_A="10.72863"/>
      <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="-19.10514" BBK_DIFF_A="0.83733"/>
      <bbk:Obs TIME_PERIOD="2009-11-19" OBS_VALUE="-19.94247" BBK_DIFF_A="-11.6593"/>
      <bbk:Obs TIME_PERIOD="2009-11-18" OBS_VALUE="-8.28317" BBK_DIFF_A="-0.08149"/>
      <bbk:Obs TIME_PERIOD="2009-11-17" OBS_VALUE="-8.20168" BBK_DIFF_A="0.26474"/>
      <bbk:Obs TIME_PERIOD="2009-11-16" OBS_VALUE="-8.46642" BBK_DIFF_A="-0.04339"/>
      <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="-8.42303" BBK_DIFF_A="0.06405"/>
      <bbk:Obs TIME_PERIOD="2009-11-12" OBS_VALUE="-8.48708" BBK_DIFF_A="-0.00259"/>
      <bbk:Obs TIME_PERIOD="2009-11-11" OBS_VALUE="-8.48449" BBK_DIFF_A="-0.17968"/>
      <bbk:Obs TIME_PERIOD="2009-11-10" OBS_VALUE="-8.30481" BBK_DIFF_A="0.19335"/>
      <bbk:Obs TIME_PERIOD="2009-11-09" OBS_VALUE="-8.49816" BBK_DIFF_A="0.12702"/>
      <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="-8.62518" BBK_DIFF_A="-0.02241"/>
      <bbk:Obs TIME_PERIOD="2009-11-05" OBS_VALUE="-8.60277" BBK_DIFF_A="0.17817"/>
      <bbk:Obs TIME_PERIOD="2009-11-04" OBS_VALUE="-8.78094" BBK_DIFF_A="-0.00497"/>
      <bbk:Obs TIME_PERIOD="2009-11-03" OBS_VALUE="-8.77597" BBK_DIFF_A="0.16298"/>
      <bbk:Obs TIME_PERIOD="2009-11-02" OBS_VALUE="-8.93895" BBK_DIFF_A="-0.262"/>
      <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="-8.67695" BBK_DIFF_A="-0.13167"/>
      <bbk:Obs TIME_PERIOD="2009-10-29" OBS_VALUE="-8.54528" BBK_DIFF_A="0.30991"/>
      <bbk:Obs TIME_PERIOD="2009-10-28" OBS_VALUE="-8.85519" BBK_DIFF_A="-0.18062"/>
      <bbk:Obs TIME_PERIOD="2009-10-27" OBS_VALUE="-8.67457" BBK_DIFF_A="-1.13644"/>
      <bbk:Obs TIME_PERIOD="2009-10-26" OBS_VALUE="-7.53813" BBK_DIFF_A="0.49625"/>
      <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="-8.03438" BBK_DIFF_A="0.43074"/>
      <bbk:Obs TIME_PERIOD="2009-10-22" OBS_VALUE="-8.46512" BBK_DIFF_A="0.08115"/>
      <bbk:Obs TIME_PERIOD="2009-10-21" OBS_VALUE="-8.54627" BBK_DIFF_A="-0.05497"/>
      <bbk:Obs TIME_PERIOD="2009-10-20" OBS_VALUE="-8.4913" BBK_DIFF_A="0.04063"/>
      <bbk:Obs TIME_PERIOD="2009-10-19" OBS_VALUE="-8.53193" BBK_DIFF_A="-1.91947"/>
      <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="-6.61246" BBK_DIFF_A="1.96845"/>
      <bbk:Obs TIME_PERIOD="2009-10-15" OBS_VALUE="-8.58091" BBK_DIFF_A="0.17749"/>
      <bbk:Obs TIME_PERIOD="2009-10-14" OBS_VALUE="-8.7584" BBK_DIFF_A="0.12742"/>
      <bbk:Obs TIME_PERIOD="2009-10-13" OBS_VALUE="-8.88582" BBK_DIFF_A="-0.14806"/>
      <bbk:Obs TIME_PERIOD="2009-10-12" OBS_VALUE="-8.73776" BBK_DIFF_A="-0.16188"/>
      <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="-8.57588" BBK_DIFF_A="-0.0627"/>
      <bbk:Obs TIME_PERIOD="2009-10-08" OBS_VALUE="-8.51318" BBK_DIFF_A="-0.05915"/>
      <bbk:Obs TIME_PERIOD="2009-10-07" OBS_VALUE="-8.45403" BBK_DIFF_A="0.10867"/>
      <bbk:Obs TIME_PERIOD="2009-10-06" OBS_VALUE="-8.5627" BBK_DIFF_A="-0.27175"/>
      <bbk:Obs TIME_PERIOD="2009-10-05" OBS_VALUE="-8.29095" BBK_DIFF_A="-0.05462"/>
      <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="-8.23633" BBK_DIFF_A="-0.03925"/>
      <bbk:Obs TIME_PERIOD="2009-10-01" OBS_VALUE="-8.19708" BBK_DIFF_A="0.03551"/>
      <bbk:Obs TIME_PERIOD="2009-09-30" OBS_VALUE="-8.23259" BBK_DIFF_A="-0.01265"/>
      <bbk:Obs TIME_PERIOD="2009-09-29" OBS_VALUE="-8.21994" BBK_DIFF_A="-0.09525"/>
      <bbk:Obs TIME_PERIOD="2009-09-28" OBS_VALUE="-8.12469" BBK_DIFF_A="-0.04801"/>
      <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="-8.07668" BBK_DIFF_A="-0.1091"/>
      <bbk:Obs TIME_PERIOD="2009-09-24" OBS_VALUE="-7.96758" BBK_DIFF_A="0.11389"/>
      <bbk:Obs TIME_PERIOD="2009-09-23" OBS_VALUE="-8.08147" BBK_DIFF_A="0.06019"/>
      <bbk:Obs TIME_PERIOD="2009-09-22" OBS_VALUE="-8.14166" BBK_DIFF_A="-0.16985"/>
      <bbk:Obs TIME_PERIOD="2009-09-21" OBS_VALUE="-7.97181" BBK_DIFF_A="0.06918"/>
      <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="-8.04099" BBK_DIFF_A="-0.03167"/>
      <bbk:Obs TIME_PERIOD="2009-09-17" OBS_VALUE="-8.00932" BBK_DIFF_A="0.33349"/>
      <bbk:Obs TIME_PERIOD="2009-09-16" OBS_VALUE="-8.34281" BBK_DIFF_A="-0.0695"/>
      <bbk:Obs TIME_PERIOD="2009-09-15" OBS_VALUE="-8.27331" BBK_DIFF_A="0.04855"/>
      <bbk:Obs TIME_PERIOD="2009-09-14" OBS_VALUE="-8.32186" BBK_DIFF_A="-0.33727"/>
      <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="-7.98459" BBK_DIFF_A="-0.12789"/>
      <bbk:Obs TIME_PERIOD="2009-09-10" OBS_VALUE="-7.8567" BBK_DIFF_A="0.2157"/>
      <bbk:Obs TIME_PERIOD="2009-09-09" OBS_VALUE="-8.0724" BBK_DIFF_A="0.06179"/>
      <bbk:Obs TIME_PERIOD="2009-09-08" OBS_VALUE="-8.13419" BBK_DIFF_A="-0.20228"/>
      <bbk:Obs TIME_PERIOD="2009-09-07" OBS_VALUE="-7.93191" BBK_DIFF_A="0.13602"/>
      <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="-8.06793" BBK_DIFF_A="-0.15751"/>
      <bbk:Obs TIME_PERIOD="2009-09-03" OBS_VALUE="-7.91042" BBK_DIFF_A="0.00399"/>
      <bbk:Obs TIME_PERIOD="2009-09-02" OBS_VALUE="-7.91441" BBK_DIFF_A="0.04366"/>
      <bbk:Obs TIME_PERIOD="2009-09-01" OBS_VALUE="-7.95807" BBK_DIFF_A="-0.19121"/>
      <bbk:Obs TIME_PERIOD="2009-08-31" OBS_VALUE="-7.76686" BBK_DIFF_A="0.18117"/>
      <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="-7.94803" BBK_DIFF_A="-0.15211"/>
      <bbk:Obs TIME_PERIOD="2009-08-27" OBS_VALUE="-7.79592" BBK_DIFF_A="-0.03271"/>
      <bbk:Obs TIME_PERIOD="2009-08-26" OBS_VALUE="-7.76321" BBK_DIFF_A="0.62071"/>
      <bbk:Obs TIME_PERIOD="2009-08-25" OBS_VALUE="-8.38392" BBK_DIFF_A="0.0082"/>
      <bbk:Obs TIME_PERIOD="2009-08-24" OBS_VALUE="-8.39212" BBK_DIFF_A="-0.12062"/>
      <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="-8.2715" BBK_DIFF_A="-0.11128"/>
      <bbk:Obs TIME_PERIOD="2009-08-20" OBS_VALUE="-8.16022" BBK_DIFF_A="0.18388"/>
      <bbk:Obs TIME_PERIOD="2009-08-19" OBS_VALUE="-8.3441" BBK_DIFF_A="-0.03445"/>
      <bbk:Obs TIME_PERIOD="2009-08-18" OBS_VALUE="-8.30965" BBK_DIFF_A="-0.05099"/>
      <bbk:Obs TIME_PERIOD="2009-08-17" OBS_VALUE="-8.25866" BBK_DIFF_A="-0.15434"/>
      <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="-8.10432" BBK_DIFF_A="-0.28709"/>
      <bbk:Obs TIME_PERIOD="2009-08-13" OBS_VALUE="-7.81723" BBK_DIFF_A="-0.18542"/>
      <bbk:Obs TIME_PERIOD="2009-08-12" OBS_VALUE="-7.63181" BBK_DIFF_A="0.73734"/>
      <bbk:Obs TIME_PERIOD="2009-08-11" OBS_VALUE="-8.36915" BBK_DIFF_A="-0.12698"/>
      <bbk:Obs TIME_PERIOD="2009-08-10" OBS_VALUE="-8.24217" BBK_DIFF_A="0.10362"/>
      <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="-8.34579" BBK_DIFF_A="-12.93242"/>
      <bbk:Obs TIME_PERIOD="2009-08-06" OBS_VALUE="4.58663" BBK_DIFF_A="-1.30941"/>
      <bbk:Obs TIME_PERIOD="2009-08-05" OBS_VALUE="5.89604" BBK_DIFF_A="-1.2495"/>
      <bbk:Obs TIME_PERIOD="2009-08-04" OBS_VALUE="7.14554" BBK_DIFF_A="0.76089"/>
      <bbk:Obs TIME_PERIOD="2009-08-03" OBS_VALUE="6.38465" BBK_DIFF_A="0.61344"/>
      <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="5.77121" BBK_DIFF_A="0.09104"/>
      <bbk:Obs TIME_PERIOD="2009-07-30" OBS_VALUE="5.68017" BBK_DIFF_A="-0.50471"/>
      <bbk:Obs TIME_PERIOD="2009-07-29" OBS_VALUE="6.18488" BBK_DIFF_A="-0.17205"/>
      <bbk:Obs TIME_PERIOD="2009-07-28" OBS_VALUE="6.35693" BBK_DIFF_A="-0.38261"/>
      <bbk:Obs TIME_PERIOD="2009-07-27" OBS_VALUE="6.73954" BBK_DIFF_A="2.98985"/>
      <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="3.74969" BBK_DIFF_A="1.29977"/>
      <bbk:Obs TIME_PERIOD="2009-07-23" OBS_VALUE="2.44992" BBK_DIFF_A="0.84123"/>
      <bbk:Obs TIME_PERIOD="2009-07-22" OBS_VALUE="1.60869" BBK_DIFF_A="0.57603"/>
      <bbk:Obs TIME_PERIOD="2009-07-21" OBS_VALUE="1.03266" BBK_DIFF_A="-1.29747"/>
      <bbk:Obs TIME_PERIOD="2009-07-20" OBS_VALUE="2.33013" BBK_DIFF_A="-1.45896"/>
      <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="3.78909" BBK_DIFF_A="-0.48937"/>
      <bbk:Obs TIME_PERIOD="2009-07-16" OBS_VALUE="4.27846" BBK_DIFF_A="-0.40404"/>
      <bbk:Obs TIME_PERIOD="2009-07-15" OBS_VALUE="4.6825" BBK_DIFF_A="0.55287"/>
      <bbk:Obs TIME_PERIOD="2009-07-14" OBS_VALUE="4.12963" BBK_DIFF_A="-0.44066"/>
      <bbk:Obs TIME_PERIOD="2009-07-13" OBS_VALUE="4.57029" BBK_DIFF_A="-1.27781"/>
      <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="5.8481" BBK_DIFF_A="-0.09342"/>
      <bbk:Obs TIME_PERIOD="2009-07-09" OBS_VALUE="5.94152" BBK_DIFF_A="0.67586"/>
      <bbk:Obs TIME_PERIOD="2009-07-08" OBS_VALUE="5.26566" BBK_DIFF_A="-0.39977"/>
      <bbk:Obs TIME_PERIOD="2009-07-07" OBS_VALUE="5.66543" BBK_DIFF_A="-0.14002"/>
      <bbk:Obs TIME_PERIOD="2009-07-06" OBS_VALUE="5.80545" BBK_DIFF_A="-0.22991"/>
      <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="6.03536" BBK_DIFF_A="2.98885"/>
      <bbk:Obs TIME_PERIOD="2009-07-02" OBS_VALUE="3.04651" BBK_DIFF_A="-1.36016"/>
      <bbk:Obs TIME_PERIOD="2009-07-01" OBS_VALUE="4.40667" BBK_DIFF_A="-0.52351"/>
      <bbk:Obs TIME_PERIOD="2009-06-30" OBS_VALUE="4.93018" BBK_DIFF_A="0.32457"/>
      <bbk:Obs TIME_PERIOD="2009-06-29" OBS_VALUE="4.60561" BBK_DIFF_A="0.89053"/>
      <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="3.71508" BBK_DIFF_A="0.16083"/>
      <bbk:Obs TIME_PERIOD="2009-06-25" OBS_VALUE="3.55425" BBK_DIFF_A="11.87751"/>
      <bbk:Obs TIME_PERIOD="2009-06-24" OBS_VALUE="-8.32326" BBK_DIFF_A="-0.01841"/>
      <bbk:Obs TIME_PERIOD="2009-06-23" OBS_VALUE="-8.30485" BBK_DIFF_A="0.09727"/>
      <bbk:Obs TIME_PERIOD="2009-06-22" OBS_VALUE="-8.40212" BBK_DIFF_A="-0.30751"/>
      <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="-8.09461" BBK_DIFF_A="-0.25772"/>
      <bbk:Obs TIME_PERIOD="2009-06-18" OBS_VALUE="-7.83689" BBK_DIFF_A="-9.49738"/>
      <bbk:Obs TIME_PERIOD="2009-06-17" OBS_VALUE="1.66049" BBK_DIFF_A="0.25299"/>
      <bbk:Obs TIME_PERIOD="2009-06-16" OBS_VALUE="1.4075" BBK_DIFF_A="-0.11843"/>
      <bbk:Obs TIME_PERIOD="2009-06-15" OBS_VALUE="1.52593" BBK_DIFF_A="-0.15108"/>
      <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="1.67701" BBK_DIFF_A="16.84556"/>
      <bbk:Obs TIME_PERIOD="2009-06-11" OBS_VALUE="-15.16855" BBK_DIFF_A="-8.24022"/>
      <bbk:Obs TIME_PERIOD="2009-06-10" OBS_VALUE="-6.92833" BBK_DIFF_A="0.03469"/>
      <bbk:Obs TIME_PERIOD="2009-06-09" OBS_VALUE="-6.96302" BBK_DIFF_A="0.43479"/>
      <bbk:Obs TIME_PERIOD="2009-06-08" OBS_VALUE="-7.39781" BBK_DIFF_A="0.70005"/>
      <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="-8.09786" BBK_DIFF_A="0.42983"/>
      <bbk:Obs TIME_PERIOD="2009-06-04" OBS_VALUE="-8.52769" BBK_DIFF_A="0.32846"/>
      <bbk:Obs TIME_PERIOD="2009-06-03" OBS_VALUE="-8.85615" BBK_DIFF_A="-0.29267"/>
      <bbk:Obs TIME_PERIOD="2009-06-02" OBS_VALUE="-8.56348" BBK_DIFF_A="0.62372"/>
      <bbk:Obs TIME_PERIOD="2009-06-01" OBS_VALUE="-9.1872" BBK_DIFF_A="-0.62209"/>
      <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="-8.56511" BBK_DIFF_A="-0.06448"/>
      <bbk:Obs TIME_PERIOD="2009-05-28" OBS_VALUE="-8.50063" BBK_DIFF_A="-0.17374"/>
      <bbk:Obs TIME_PERIOD="2009-05-27" OBS_VALUE="-8.32689" BBK_DIFF_A="0.12642"/>
      <bbk:Obs TIME_PERIOD="2009-05-26" OBS_VALUE="-8.45331" BBK_DIFF_A="0.02193"/>
      <bbk:Obs TIME_PERIOD="2009-05-25" OBS_VALUE="-8.47524" BBK_DIFF_A="0.063"/>
      <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="-8.53824" BBK_DIFF_A="0.01916"/>
      <bbk:Obs TIME_PERIOD="2009-05-21" OBS_VALUE="-8.5574" BBK_DIFF_A="-0.19253"/>
      <bbk:Obs TIME_PERIOD="2009-05-20" OBS_VALUE="-8.36487" BBK_DIFF_A="0.03326"/>
      <bbk:Obs TIME_PERIOD="2009-05-19" OBS_VALUE="-8.39813" BBK_DIFF_A="-0.08335"/>
      <bbk:Obs TIME_PERIOD="2009-05-18" OBS_VALUE="-8.31478" BBK_DIFF_A="-10.57295"/>
      <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="2.25817" BBK_DIFF_A="-0.67909"/>
      <bbk:Obs TIME_PERIOD="2009-05-14" OBS_VALUE="2.93726" BBK_DIFF_A="1.437"/>
      <bbk:Obs TIME_PERIOD="2009-05-13" OBS_VALUE="1.50026" BBK_DIFF_A="3.68193"/>
      <bbk:Obs TIME_PERIOD="2009-05-12" OBS_VALUE="-2.18167" BBK_DIFF_A="-0.23984"/>
      <bbk:Obs TIME_PERIOD="2009-05-11" OBS_VALUE="-1.94183" BBK_DIFF_A="-0.73987"/>
      <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="-1.20196" BBK_DIFF_A="-2.61929"/>
      <bbk:Obs TIME_PERIOD="2009-05-07" OBS_VALUE="1.41733" BBK_DIFF_A="5.23687"/>
      <bbk:Obs TIME_PERIOD="2009-05-06" OBS_VALUE="-3.81954" BBK_DIFF_A="-0.04396"/>
      <bbk:Obs TIME_PERIOD="2009-05-05" OBS_VALUE="-3.77558" BBK_DIFF_A="-0.0717"/>
      <bbk:Obs TIME_PERIOD="2009-05-04" OBS_VALUE="-3.70388" BBK_DIFF_A="3.20016"/>
      <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="-6.90404" BBK_DIFF_A="-0.85528"/>
      <bbk:Obs TIME_PERIOD="2009-04-29" OBS_VALUE="-6.04876" BBK_DIFF_A="0.84572"/>
      <bbk:Obs TIME_PERIOD="2009-04-28" OBS_VALUE="-6.89448" BBK_DIFF_A="0.06206"/>
      <bbk:Obs TIME_PERIOD="2009-04-27" OBS_VALUE="-6.95654" BBK_DIFF_A="-0.11137"/>
      <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="-6.84517" BBK_DIFF_A="0.12669"/>
      <bbk:Obs TIME_PERIOD="2009-04-23" OBS_VALUE="-6.97186" BBK_DIFF_A="-5.72568"/>
      <bbk:Obs TIME_PERIOD="2009-04-22" OBS_VALUE="-1.24618" BBK_DIFF_A="0.03127"/>
      <bbk:Obs TIME_PERIOD="2009-04-21" OBS_VALUE="-1.27745" BBK_DIFF_A="-2.67298"/>
      <bbk:Obs TIME_PERIOD="2009-04-20" OBS_VALUE="1.39553" BBK_DIFF_A="2.26224"/>
      <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="-0.86671" BBK_DIFF_A="-3.46317"/>
      <bbk:Obs TIME_PERIOD="2009-04-16" OBS_VALUE="2.59646" BBK_DIFF_A="-0.45993"/>
      <bbk:Obs TIME_PERIOD="2009-04-15" OBS_VALUE="3.05639" BBK_DIFF_A="-0.2488"/>
      <bbk:Obs TIME_PERIOD="2009-04-14" OBS_VALUE="3.30519" BBK_DIFF_A="0.27592"/>
      <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="3.02927" BBK_DIFF_A="0.53459"/>
      <bbk:Obs TIME_PERIOD="2009-04-08" OBS_VALUE="2.49468" BBK_DIFF_A="-0.39414"/>
      <bbk:Obs TIME_PERIOD="2009-04-07" OBS_VALUE="2.88882" BBK_DIFF_A="0.22858"/>
      <bbk:Obs TIME_PERIOD="2009-04-06" OBS_VALUE="2.66024" BBK_DIFF_A="0.76243"/>
      <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="1.89781" BBK_DIFF_A="8.36577"/>
      <bbk:Obs TIME_PERIOD="2009-04-02" OBS_VALUE="-6.46796" BBK_DIFF_A="0.07513"/>
      <bbk:Obs TIME_PERIOD="2009-04-01" OBS_VALUE="-6.54309" BBK_DIFF_A="0.08907"/>
      <bbk:Obs TIME_PERIOD="2009-03-31" OBS_VALUE="-6.63216" BBK_DIFF_A="-0.09278"/>
      <bbk:Obs TIME_PERIOD="2009-03-30" OBS_VALUE="-6.53938" BBK_DIFF_A="-2.72036"/>
      <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="-3.81902" BBK_DIFF_A="2.69599"/>
      <bbk:Obs TIME_PERIOD="2009-03-26" OBS_VALUE="-6.51501" BBK_DIFF_A="-7.19089"/>
      <bbk:Obs TIME_PERIOD="2009-03-25" OBS_VALUE="0.67588" BBK_DIFF_A="-0.57207"/>
      <bbk:Obs TIME_PERIOD="2009-03-24" OBS_VALUE="1.24795" BBK_DIFF_A="-0.69814"/>
      <bbk:Obs TIME_PERIOD="2009-03-23" OBS_VALUE="1.94609" BBK_DIFF_A="8.48447"/>
      <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="-6.53838" BBK_DIFF_A="0.03393"/>
      <bbk:Obs TIME_PERIOD="2009-03-19" OBS_VALUE="-6.57231" BBK_DIFF_A="-0.1152"/>
      <bbk:Obs TIME_PERIOD="2009-03-18" OBS_VALUE="-6.45711" BBK_DIFF_A="-0.01374"/>
      <bbk:Obs TIME_PERIOD="2009-03-17" OBS_VALUE="-6.44337" BBK_DIFF_A="-0.01524"/>
      <bbk:Obs TIME_PERIOD="2009-03-16" OBS_VALUE="-6.42813" BBK_DIFF_A="-0.49762"/>
      <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="-5.93051" BBK_DIFF_A="0.02647"/>
      <bbk:Obs TIME_PERIOD="2009-03-12" OBS_VALUE="-5.95698" BBK_DIFF_A="-2.60664"/>
      <bbk:Obs TIME_PERIOD="2009-03-11" OBS_VALUE="-3.35034" BBK_DIFF_A="2.95438"/>
      <bbk:Obs TIME_PERIOD="2009-03-10" OBS_VALUE="-6.30472" BBK_DIFF_A="-0.1158"/>
      <bbk:Obs TIME_PERIOD="2009-03-09" OBS_VALUE="-6.18892" BBK_DIFF_A="0.13274"/>
      <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="-6.32166" BBK_DIFF_A="-2.77111"/>
      <bbk:Obs TIME_PERIOD="2009-03-05" OBS_VALUE="-3.55055" BBK_DIFF_A="0.05586"/>
      <bbk:Obs TIME_PERIOD="2009-03-04" OBS_VALUE="-3.60641" BBK_DIFF_A="-1.2768"/>
      <bbk:Obs TIME_PERIOD="2009-03-03" OBS_VALUE="-2.32961" BBK_DIFF_A="0.74036"/>
      <bbk:Obs TIME_PERIOD="2009-03-02" OBS_VALUE="-3.06997" BBK_DIFF_A="1.7215"/>
      <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="-4.79147" BBK_DIFF_A="-5.97437"/>
      <bbk:Obs TIME_PERIOD="2009-02-26" OBS_VALUE="1.1829" BBK_DIFF_A="3.05044"/>
      <bbk:Obs TIME_PERIOD="2009-02-25" OBS_VALUE="-1.86754" BBK_DIFF_A="-0.43867"/>
      <bbk:Obs TIME_PERIOD="2009-02-24" OBS_VALUE="-1.42887" BBK_DIFF_A="0.77192"/>
      <bbk:Obs TIME_PERIOD="2009-02-23" OBS_VALUE="-2.20079" BBK_DIFF_A="-0.87856"/>
      <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="-1.32223" BBK_DIFF_A="-1.86249"/>
      <bbk:Obs TIME_PERIOD="2009-02-19" OBS_VALUE="0.54026" BBK_DIFF_A="-0.52409"/>
      <bbk:Obs TIME_PERIOD="2009-02-18" OBS_VALUE="1.06435" BBK_DIFF_A="-0.09068"/>
      <bbk:Obs TIME_PERIOD="2009-02-17" OBS_VALUE="1.15503" BBK_DIFF_A="-0.73902"/>
      <bbk:Obs TIME_PERIOD="2009-02-16" OBS_VALUE="1.89405" BBK_DIFF_A="0.34594"/>
      <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="1.54811" BBK_DIFF_A="0.79854"/>
      <bbk:Obs TIME_PERIOD="2009-02-12" OBS_VALUE="0.74957" BBK_DIFF_A="-0.67823"/>
      <bbk:Obs TIME_PERIOD="2009-02-11" OBS_VALUE="1.4278" BBK_DIFF_A="0.47313"/>
      <bbk:Obs TIME_PERIOD="2009-02-10" OBS_VALUE="0.95467" BBK_DIFF_A="-0.32815"/>
      <bbk:Obs TIME_PERIOD="2009-02-09" OBS_VALUE="1.28282" BBK_DIFF_A="0.69903"/>
      <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="0.58379" BBK_DIFF_A="-0.41157"/>
      <bbk:Obs TIME_PERIOD="2009-02-05" OBS_VALUE="0.99536" BBK_DIFF_A="0.63385"/>
      <bbk:Obs TIME_PERIOD="2009-02-04" OBS_VALUE="0.36151" BBK_DIFF_A="-0.07693"/>
      <bbk:Obs TIME_PERIOD="2009-02-03" OBS_VALUE="0.43844" BBK_DIFF_A="2.90293"/>
      <bbk:Obs TIME_PERIOD="2009-02-02" OBS_VALUE="-2.46449" BBK_DIFF_A="0.932"/>
      <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="-3.39649" BBK_DIFF_A="-1.37216"/>
      <bbk:Obs TIME_PERIOD="2009-01-29" OBS_VALUE="-2.02433" BBK_DIFF_A="0.11576"/>
      <bbk:Obs TIME_PERIOD="2009-01-28" OBS_VALUE="-2.14009" BBK_DIFF_A="0.13833"/>
      <bbk:Obs TIME_PERIOD="2009-01-27" OBS_VALUE="-2.27842" BBK_DIFF_A="1.30822"/>
      <bbk:Obs TIME_PERIOD="2009-01-26" OBS_VALUE="-3.58664" BBK_DIFF_A="0.68017"/>
      <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="-4.26681" BBK_DIFF_A="3.83132"/>
      <bbk:Obs TIME_PERIOD="2009-01-22" OBS_VALUE="-8.09813" BBK_DIFF_A="-5.44971"/>
      <bbk:Obs TIME_PERIOD="2009-01-21" OBS_VALUE="-2.64842" BBK_DIFF_A="0.03292"/>
      <bbk:Obs TIME_PERIOD="2009-01-20" OBS_VALUE="-2.68134" BBK_DIFF_A="-0.07482"/>
      <bbk:Obs TIME_PERIOD="2009-01-19" OBS_VALUE="-2.60652" BBK_DIFF_A="-6.8362"/>
      <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="4.22968" BBK_DIFF_A="-1.20405"/>
      <bbk:Obs TIME_PERIOD="2009-01-15" OBS_VALUE="5.43373" BBK_DIFF_A="2.98918"/>
      <bbk:Obs TIME_PERIOD="2009-01-14" OBS_VALUE="2.44455" BBK_DIFF_A="5.5816"/>
      <bbk:Obs TIME_PERIOD="2009-01-13" OBS_VALUE="-3.13705" BBK_DIFF_A="-0.12022"/>
      <bbk:Obs TIME_PERIOD="2009-01-12" OBS_VALUE="-3.01683" BBK_DIFF_A="-0.2095"/>
      <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="-2.80733" BBK_DIFF_A="0.08997"/>
      <bbk:Obs TIME_PERIOD="2009-01-08" OBS_VALUE="-2.8973" BBK_DIFF_A="-0.24119"/>
      <bbk:Obs TIME_PERIOD="2009-01-07" OBS_VALUE="-2.65611" BBK_DIFF_A="0.19936"/>
      <bbk:Obs TIME_PERIOD="2009-01-06" OBS_VALUE="-2.85547" BBK_DIFF_A="-0.26853"/>
      <bbk:Obs TIME_PERIOD="2009-01-05" OBS_VALUE="-2.58694" BBK_DIFF_A="0.16903"/>
      <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="-2.75597" BBK_DIFF_A="-0.15751"/>
      <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="-2.59846" BBK_DIFF_A="0.08785"/>
      <bbk:Obs TIME_PERIOD="2008-12-29" OBS_VALUE="-2.68631" BBK_DIFF_A="0.64246"/>
      <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="-3.32877" BBK_DIFF_A="0.12351"/>
      <bbk:Obs TIME_PERIOD="2008-12-22" OBS_VALUE="-3.45228" BBK_DIFF_A="0.60138"/>
      <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="-4.05366" BBK_DIFF_A="-0.06613"/>
      <bbk:Obs TIME_PERIOD="2008-12-18" OBS_VALUE="-3.98753" BBK_DIFF_A="6.53772"/>
      <bbk:Obs TIME_PERIOD="2008-12-17" OBS_VALUE="-10.52525" BBK_DIFF_A="-0.71175"/>
      <bbk:Obs TIME_PERIOD="2008-12-16" OBS_VALUE="-9.8135" BBK_DIFF_A="-0.04823"/>
      <bbk:Obs TIME_PERIOD="2008-12-15" OBS_VALUE="-9.76527" BBK_DIFF_A="0.36046"/>
      <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="-10.12573" BBK_DIFF_A="0.17628"/>
      <bbk:Obs TIME_PERIOD="2008-12-11" OBS_VALUE="-10.30201" BBK_DIFF_A="0.50913"/>
      <bbk:Obs TIME_PERIOD="2008-12-10" OBS_VALUE="-10.81114" BBK_DIFF_A="0.34228"/>
      <bbk:Obs TIME_PERIOD="2008-12-09" OBS_VALUE="-11.15342" BBK_DIFF_A="-8.0295"/>
      <bbk:Obs TIME_PERIOD="2008-12-08" OBS_VALUE="-3.12392" BBK_DIFF_A="-6.38488"/>
      <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="3.26096" BBK_DIFF_A="-1.37481"/>
      <bbk:Obs TIME_PERIOD="2008-12-04" OBS_VALUE="4.63577" BBK_DIFF_A="-0.60514"/>
      <bbk:Obs TIME_PERIOD="2008-12-03" OBS_VALUE="5.24091" BBK_DIFF_A="1.0105"/>
      <bbk:Obs TIME_PERIOD="2008-12-02" OBS_VALUE="4.23041" BBK_DIFF_A="0.14925"/>
      <bbk:Obs TIME_PERIOD="2008-12-01" OBS_VALUE="4.08116" BBK_DIFF_A="1.36523"/>
      <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="2.71593" BBK_DIFF_A="0.82376"/>
      <bbk:Obs TIME_PERIOD="2008-11-27" OBS_VALUE="1.89217" BBK_DIFF_A="-0.27464"/>
      <bbk:Obs TIME_PERIOD="2008-11-26" OBS_VALUE="2.16681" BBK_DIFF_A="-1.20868"/>
      <bbk:Obs TIME_PERIOD="2008-11-25" OBS_VALUE="3.37549" BBK_DIFF_A="-1.38286"/>
      <bbk:Obs TIME_PERIOD="2008-11-24" OBS_VALUE="4.75835" BBK_DIFF_A="-2.27219"/>
      <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="7.03054" BBK_DIFF_A="-0.28733"/>
      <bbk:Obs TIME_PERIOD="2008-11-20" OBS_VALUE="7.31787" BBK_DIFF_A="2.11665"/>
      <bbk:Obs TIME_PERIOD="2008-11-19" OBS_VALUE="5.20122" BBK_DIFF_A="-1.08593"/>
      <bbk:Obs TIME_PERIOD="2008-11-18" OBS_VALUE="6.28715" BBK_DIFF_A="-0.20546"/>
      <bbk:Obs TIME_PERIOD="2008-11-17" OBS_VALUE="6.49261" BBK_DIFF_A="1.16917"/>
      <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="5.32344" BBK_DIFF_A="12.81012"/>
      <bbk:Obs TIME_PERIOD="2008-11-13" OBS_VALUE="-7.48668" BBK_DIFF_A="1.92856"/>
      <bbk:Obs TIME_PERIOD="2008-11-12" OBS_VALUE="-9.41524" BBK_DIFF_A="10.58476"/>
      <bbk:Obs TIME_PERIOD="2008-11-11" OBS_VALUE="-20.0" BBK_DIFF_A="-5.58513"/>
      <bbk:Obs TIME_PERIOD="2008-11-10" OBS_VALUE="-14.41487" BBK_DIFF_A="-3.19944"/>
      <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="-11.21543" BBK_DIFF_A="8.78457"/>
      <bbk:Obs TIME_PERIOD="2008-11-06" OBS_VALUE="-20.0" BBK_DIFF_A="-9.32334"/>
      <bbk:Obs TIME_PERIOD="2008-11-05" OBS_VALUE="-10.67666" BBK_DIFF_A="2.43118"/>
      <bbk:Obs TIME_PERIOD="2008-11-04" OBS_VALUE="-13.10784" BBK_DIFF_A="6.3647"/>
      <bbk:Obs TIME_PERIOD="2008-11-03" OBS_VALUE="-19.47254" BBK_DIFF_A="-0.29708"/>
      <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="-19.17546" BBK_DIFF_A="0.82454"/>
      <bbk:Obs TIME_PERIOD="2008-10-30" OBS_VALUE="-20.0" BBK_DIFF_A="-0.49303"/>
      <bbk:Obs TIME_PERIOD="2008-10-29" OBS_VALUE="-19.50697" BBK_DIFF_A="-0.8089"/>
      <bbk:Obs TIME_PERIOD="2008-10-28" OBS_VALUE="-18.69807" BBK_DIFF_A="-0.23585"/>
      <bbk:Obs TIME_PERIOD="2008-10-27" OBS_VALUE="-18.46222" BBK_DIFF_A="0.04124"/>
      <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="-18.50346" BBK_DIFF_A="0.34777"/>
      <bbk:Obs TIME_PERIOD="2008-10-23" OBS_VALUE="-18.85123" BBK_DIFF_A="-0.11481"/>
      <bbk:Obs TIME_PERIOD="2008-10-22" OBS_VALUE="-18.73642" BBK_DIFF_A="-1.36545"/>
      <bbk:Obs TIME_PERIOD="2008-10-21" OBS_VALUE="-17.37097" BBK_DIFF_A="0.01942"/>
      <bbk:Obs TIME_PERIOD="2008-10-20" OBS_VALUE="-17.39039" BBK_DIFF_A="2.39139"/>
      <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="-19.78178" BBK_DIFF_A="-1.87442"/>
      <bbk:Obs TIME_PERIOD="2008-10-16" OBS_VALUE="-17.90736" BBK_DIFF_A="-37.90736"/>
      <bbk:Obs TIME_PERIOD="2008-10-15" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2008-10-14" OBS_VALUE="20.0" BBK_DIFF_A="1.80722"/>
      <bbk:Obs TIME_PERIOD="2008-10-13" OBS_VALUE="18.19278" BBK_DIFF_A="12.18536"/>
      <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="6.00742" BBK_DIFF_A="-13.99258"/>
      <bbk:Obs TIME_PERIOD="2008-10-09" OBS_VALUE="20.0" BBK_DIFF_A="29.5794"/>
      <bbk:Obs TIME_PERIOD="2008-10-08" OBS_VALUE="-9.5794" BBK_DIFF_A="10.4206"/>
      <bbk:Obs TIME_PERIOD="2008-10-07" OBS_VALUE="-20.0" BBK_DIFF_A="-0.20409"/>
      <bbk:Obs TIME_PERIOD="2008-10-06" OBS_VALUE="-19.79591" BBK_DIFF_A="-2.17211"/>
      <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="-17.6238" BBK_DIFF_A="-37.6238"/>
      <bbk:Obs TIME_PERIOD="2008-10-02" OBS_VALUE="20.0" BBK_DIFF_A="37.61824"/>
      <bbk:Obs TIME_PERIOD="2008-10-01" OBS_VALUE="-17.61824" BBK_DIFF_A="-16.12737"/>
      <bbk:Obs TIME_PERIOD="2008-09-30" OBS_VALUE="-1.49087" BBK_DIFF_A="17.19755"/>
      <bbk:Obs TIME_PERIOD="2008-09-29" OBS_VALUE="-18.68842" BBK_DIFF_A="-15.78708"/>
      <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="-2.90134" BBK_DIFF_A="-22.90134"/>
      <bbk:Obs TIME_PERIOD="2008-09-25" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2008-09-24" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2008-09-23" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2008-09-22" OBS_VALUE="20.0" BBK_DIFF_A="0.0"/>
      <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="20.0" BBK_DIFF_A="0.76704"/>
      <bbk:Obs TIME_PERIOD="2008-09-18" OBS_VALUE="19.23296" BBK_DIFF_A="15.40772"/>
      <bbk:Obs TIME_PERIOD="2008-09-17" OBS_VALUE="3.82524" BBK_DIFF_A="-0.54071"/>
      <bbk:Obs TIME_PERIOD="2008-09-16" OBS_VALUE="4.36595" BBK_DIFF_A="0.4962"/>
      <bbk:Obs TIME_PERIOD="2008-09-15" OBS_VALUE="3.86975" BBK_DIFF_A="0.46826"/>
      <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="3.40149" BBK_DIFF_A="-0.05119"/>
      <bbk:Obs TIME_PERIOD="2008-09-11" OBS_VALUE="3.45268" BBK_DIFF_A="-0.10939"/>
      <bbk:Obs TIME_PERIOD="2008-09-10" OBS_VALUE="3.56207" BBK_DIFF_A="0.34553"/>
      <bbk:Obs TIME_PERIOD="2008-09-09" OBS_VALUE="3.21654" BBK_DIFF_A="0.11863"/>
      <bbk:Obs TIME_PERIOD="2008-09-08" OBS_VALUE="3.09791" BBK_DIFF_A="-0.13091"/>
      <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="3.22882" BBK_DIFF_A="0.44903"/>
      <bbk:Obs TIME_PERIOD="2008-09-04" OBS_VALUE="2.77979" BBK_DIFF_A="-0.3023"/>
      <bbk:Obs TIME_PERIOD="2008-09-03" OBS_VALUE="3.08209" BBK_DIFF_A="0.06509"/>
      <bbk:Obs TIME_PERIOD="2008-09-02" OBS_VALUE="3.017" BBK_DIFF_A="0.14253"/>
      <bbk:Obs TIME_PERIOD="2008-09-01" OBS_VALUE="2.87447" BBK_DIFF_A="0.20139"/>
      <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="2.67308" BBK_DIFF_A="-0.38137"/>
      <bbk:Obs TIME_PERIOD="2008-08-28" OBS_VALUE="3.05445" BBK_DIFF_A="-0.31533"/>
      <bbk:Obs TIME_PERIOD="2008-08-27" OBS_VALUE="3.36978" BBK_DIFF_A="0.36279"/>
      <bbk:Obs TIME_PERIOD="2008-08-26" OBS_VALUE="3.00699" BBK_DIFF_A="0.01459"/>
      <bbk:Obs TIME_PERIOD="2008-08-25" OBS_VALUE="2.9924" BBK_DIFF_A="-0.15061"/>
      <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="3.14301" BBK_DIFF_A="-0.70522"/>
      <bbk:Obs TIME_PERIOD="2008-08-21" OBS_VALUE="3.84823" BBK_DIFF_A="0.11346"/>
      <bbk:Obs TIME_PERIOD="2008-08-20" OBS_VALUE="3.73477" BBK_DIFF_A="-0.39278"/>
      <bbk:Obs TIME_PERIOD="2008-08-19" OBS_VALUE="4.12755" BBK_DIFF_A="0.1669"/>
      <bbk:Obs TIME_PERIOD="2008-08-18" OBS_VALUE="3.96065" BBK_DIFF_A="0.39476"/>
      <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="3.56589" BBK_DIFF_A="0.05901"/>
      <bbk:Obs TIME_PERIOD="2008-08-14" OBS_VALUE="3.50688" BBK_DIFF_A="1.98195"/>
      <bbk:Obs TIME_PERIOD="2008-08-13" OBS_VALUE="1.52493" BBK_DIFF_A="-1.59654"/>
      <bbk:Obs TIME_PERIOD="2008-08-12" OBS_VALUE="3.12147" BBK_DIFF_A="-0.09688"/>
      <bbk:Obs TIME_PERIOD="2008-08-11" OBS_VALUE="3.21835" BBK_DIFF_A="0.23768"/>
      <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="2.98067" BBK_DIFF_A="0.79014"/>
      <bbk:Obs TIME_PERIOD="2008-08-07" OBS_VALUE="2.19053" BBK_DIFF_A="0.11722"/>
      <bbk:Obs TIME_PERIOD="2008-08-06" OBS_VALUE="2.07331" BBK_DIFF_A="0.20298"/>
      <bbk:Obs TIME_PERIOD="2008-08-05" OBS_VALUE="1.87033" BBK_DIFF_A="-0.02516"/>
      <bbk:Obs TIME_PERIOD="2008-08-04" OBS_VALUE="1.89549" BBK_DIFF_A="0.08871"/>
      <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="1.80678" BBK_DIFF_A="0.37676"/>
      <bbk:Obs TIME_PERIOD="2008-07-31" OBS_VALUE="1.43002" BBK_DIFF_A="-0.03896"/>
      <bbk:Obs TIME_PERIOD="2008-07-30" OBS_VALUE="1.46898" BBK_DIFF_A="-18.53102"/>
      <bbk:Obs TIME_PERIOD="2008-07-29" OBS_VALUE="20.0" BBK_DIFF_A="10.20164"/>
      <bbk:Obs TIME_PERIOD="2008-07-28" OBS_VALUE="9.79836" BBK_DIFF_A="8.01848"/>
      <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="1.77988" BBK_DIFF_A="0.10393"/>
      <bbk:Obs TIME_PERIOD="2008-07-24" OBS_VALUE="1.67595" BBK_DIFF_A="-11.67171"/>
      <bbk:Obs TIME_PERIOD="2008-07-23" OBS_VALUE="13.34766" BBK_DIFF_A="12.98879"/>
      <bbk:Obs TIME_PERIOD="2008-07-22" OBS_VALUE="0.35887" BBK_DIFF_A="-0.18787"/>
      <bbk:Obs TIME_PERIOD="2008-07-21" OBS_VALUE="0.54674" BBK_DIFF_A="-0.52328"/>
      <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="1.07002" BBK_DIFF_A="0.10396"/>
      <bbk:Obs TIME_PERIOD="2008-07-17" OBS_VALUE="0.96606" BBK_DIFF_A="-0.29453"/>
      <bbk:Obs TIME_PERIOD="2008-07-16" OBS_VALUE="1.26059" BBK_DIFF_A="0.18639"/>
      <bbk:Obs TIME_PERIOD="2008-07-15" OBS_VALUE="1.0742" BBK_DIFF_A="0.12648"/>
      <bbk:Obs TIME_PERIOD="2008-07-14" OBS_VALUE="0.94772" BBK_DIFF_A="-0.19135"/>
      <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="1.13907" BBK_DIFF_A="-0.07414"/>
      <bbk:Obs TIME_PERIOD="2008-07-10" OBS_VALUE="1.21321" BBK_DIFF_A="0.04037"/>
      <bbk:Obs TIME_PERIOD="2008-07-09" OBS_VALUE="1.17284" BBK_DIFF_A="-0.18579"/>
      <bbk:Obs TIME_PERIOD="2008-07-08" OBS_VALUE="1.35863" BBK_DIFF_A="2.8828"/>
      <bbk:Obs TIME_PERIOD="2008-07-07" OBS_VALUE="-1.52417" BBK_DIFF_A="-0.00359"/>
      <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="-1.52058" BBK_DIFF_A="1.75988"/>
      <bbk:Obs TIME_PERIOD="2008-07-03" OBS_VALUE="-3.28046" BBK_DIFF_A="-1.08246"/>
      <bbk:Obs TIME_PERIOD="2008-07-02" OBS_VALUE="-2.198" BBK_DIFF_A="0.23827"/>
      <bbk:Obs TIME_PERIOD="2008-07-01" OBS_VALUE="-2.43627" BBK_DIFF_A="-0.64981"/>
      <bbk:Obs TIME_PERIOD="2008-06-30" OBS_VALUE="-1.78646" BBK_DIFF_A="-0.08911"/>
      <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="-1.69735" BBK_DIFF_A="0.32538"/>
      <bbk:Obs TIME_PERIOD="2008-06-26" OBS_VALUE="-2.02273" BBK_DIFF_A="0.41074"/>
      <bbk:Obs TIME_PERIOD="2008-06-25" OBS_VALUE="-2.43347" BBK_DIFF_A="0.31167"/>
      <bbk:Obs TIME_PERIOD="2008-06-24" OBS_VALUE="-2.74514" BBK_DIFF_A="1.53088"/>
      <bbk:Obs TIME_PERIOD="2008-06-23" OBS_VALUE="-4.27602" BBK_DIFF_A="0.25159"/>
      <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="-4.52761" BBK_DIFF_A="-0.50101"/>
      <bbk:Obs TIME_PERIOD="2008-06-19" OBS_VALUE="-4.0266" BBK_DIFF_A="0.2534"/>
      <bbk:Obs TIME_PERIOD="2008-06-18" OBS_VALUE="-4.28" BBK_DIFF_A="0.22146"/>
      <bbk:Obs TIME_PERIOD="2008-06-17" OBS_VALUE="-4.50146" BBK_DIFF_A="0.02724"/>
      <bbk:Obs TIME_PERIOD="2008-06-16" OBS_VALUE="-4.5287" BBK_DIFF_A="-0.1475"/>
      <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="-4.3812" BBK_DIFF_A="-0.19082"/>
      <bbk:Obs TIME_PERIOD="2008-06-12" OBS_VALUE="-4.19038" BBK_DIFF_A="0.70069"/>
      <bbk:Obs TIME_PERIOD="2008-06-11" OBS_VALUE="-4.89107" BBK_DIFF_A="1.60735"/>
      <bbk:Obs TIME_PERIOD="2008-06-10" OBS_VALUE="-6.49842" BBK_DIFF_A="-0.01545"/>
      <bbk:Obs TIME_PERIOD="2008-06-09" OBS_VALUE="-6.48297" BBK_DIFF_A="-2.30643"/>
      <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="-4.17654" BBK_DIFF_A="-0.22777"/>
      <bbk:Obs TIME_PERIOD="2008-06-05" OBS_VALUE="-3.94877" BBK_DIFF_A="0.09503"/>
      <bbk:Obs TIME_PERIOD="2008-06-04" OBS_VALUE="-4.0438" BBK_DIFF_A="-0.06605"/>
      <bbk:Obs TIME_PERIOD="2008-06-03" OBS_VALUE="-3.97775" BBK_DIFF_A="-0.01353"/>
      <bbk:Obs TIME_PERIOD="2008-06-02" OBS_VALUE="-3.96422" BBK_DIFF_A="0.04211"/>
      <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="-4.00633" BBK_DIFF_A="0.03272"/>
      <bbk:Obs TIME_PERIOD="2008-05-29" OBS_VALUE="-4.03905" BBK_DIFF_A="0.06175"/>
      <bbk:Obs TIME_PERIOD="2008-05-28" OBS_VALUE="-4.1008" BBK_DIFF_A="-0.32704"/>
      <bbk:Obs TIME_PERIOD="2008-05-27" OBS_VALUE="-3.77376" BBK_DIFF_A="0.48742"/>
      <bbk:Obs TIME_PERIOD="2008-05-26" OBS_VALUE="-4.26118" BBK_DIFF_A="0.1652"/>
      <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="-4.42638" BBK_DIFF_A="-0.3419"/>
      <bbk:Obs TIME_PERIOD="2008-05-22" OBS_VALUE="-4.08448" BBK_DIFF_A="-0.1023"/>
      <bbk:Obs TIME_PERIOD="2008-05-21" OBS_VALUE="-3.98218" BBK_DIFF_A="-4.882"/>
      <bbk:Obs TIME_PERIOD="2008-05-20" OBS_VALUE="0.89982" BBK_DIFF_A="-0.14406"/>
      <bbk:Obs TIME_PERIOD="2008-05-19" OBS_VALUE="1.04388" BBK_DIFF_A="0.00879"/>
      <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="1.03509" BBK_DIFF_A="-0.25955"/>
      <bbk:Obs TIME_PERIOD="2008-05-15" OBS_VALUE="1.29464" BBK_DIFF_A="-0.52131"/>
      <bbk:Obs TIME_PERIOD="2008-05-14" OBS_VALUE="1.81595" BBK_DIFF_A="-0.73569"/>
      <bbk:Obs TIME_PERIOD="2008-05-13" OBS_VALUE="2.55164" BBK_DIFF_A="-0.13139"/>
      <bbk:Obs TIME_PERIOD="2008-05-12" OBS_VALUE="2.68303" BBK_DIFF_A="-0.22523"/>
      <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="2.90826" BBK_DIFF_A="0.61491"/>
      <bbk:Obs TIME_PERIOD="2008-05-08" OBS_VALUE="2.29335" BBK_DIFF_A="-0.16669"/>
      <bbk:Obs TIME_PERIOD="2008-05-07" OBS_VALUE="2.46004" BBK_DIFF_A="0.62275"/>
      <bbk:Obs TIME_PERIOD="2008-05-06" OBS_VALUE="1.83729" BBK_DIFF_A="-0.08407"/>
      <bbk:Obs TIME_PERIOD="2008-05-05" OBS_VALUE="1.92136" BBK_DIFF_A="-0.66931"/>
      <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="2.59067" BBK_DIFF_A="10.48586"/>
      <bbk:Obs TIME_PERIOD="2008-05-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2008-04-30" OBS_VALUE="-7.89519" BBK_DIFF_A="0.34648"/>
      <bbk:Obs TIME_PERIOD="2008-04-29" OBS_VALUE="-8.24167" BBK_DIFF_A="-0.74918"/>
      <bbk:Obs TIME_PERIOD="2008-04-28" OBS_VALUE="-7.49249" BBK_DIFF_A="0.53052"/>
      <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="-8.02301" BBK_DIFF_A="0.57721"/>
      <bbk:Obs TIME_PERIOD="2008-04-24" OBS_VALUE="-8.60022" BBK_DIFF_A="-0.02493"/>
      <bbk:Obs TIME_PERIOD="2008-04-23" OBS_VALUE="-8.57529" BBK_DIFF_A="0.32883"/>
      <bbk:Obs TIME_PERIOD="2008-04-22" OBS_VALUE="-8.90412" BBK_DIFF_A="0.02004"/>
      <bbk:Obs TIME_PERIOD="2008-04-21" OBS_VALUE="-8.92416" BBK_DIFF_A="-6.60749"/>
      <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="-2.31667" BBK_DIFF_A="-3.72354"/>
      <bbk:Obs TIME_PERIOD="2008-04-17" OBS_VALUE="1.40687" BBK_DIFF_A="-1.40402"/>
      <bbk:Obs TIME_PERIOD="2008-04-16" OBS_VALUE="2.81089" BBK_DIFF_A="-0.5254"/>
      <bbk:Obs TIME_PERIOD="2008-04-15" OBS_VALUE="3.33629" BBK_DIFF_A="-0.13054"/>
      <bbk:Obs TIME_PERIOD="2008-04-14" OBS_VALUE="3.46683" BBK_DIFF_A="0.10393"/>
      <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="3.3629" BBK_DIFF_A="0.39221"/>
      <bbk:Obs TIME_PERIOD="2008-04-10" OBS_VALUE="2.97069" BBK_DIFF_A="-0.60017"/>
      <bbk:Obs TIME_PERIOD="2008-04-09" OBS_VALUE="3.57086" BBK_DIFF_A="0.01183"/>
      <bbk:Obs TIME_PERIOD="2008-04-08" OBS_VALUE="3.55903" BBK_DIFF_A="0.43286"/>
      <bbk:Obs TIME_PERIOD="2008-04-07" OBS_VALUE="3.12617" BBK_DIFF_A="0.11096"/>
      <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="3.01521" BBK_DIFF_A="-0.51509"/>
      <bbk:Obs TIME_PERIOD="2008-04-03" OBS_VALUE="3.5303" BBK_DIFF_A="-0.10929"/>
      <bbk:Obs TIME_PERIOD="2008-04-02" OBS_VALUE="3.63959" BBK_DIFF_A="-0.33528"/>
      <bbk:Obs TIME_PERIOD="2008-04-01" OBS_VALUE="3.97487" BBK_DIFF_A="-0.01628"/>
      <bbk:Obs TIME_PERIOD="2008-03-31" OBS_VALUE="3.99115" BBK_DIFF_A="0.12483"/>
      <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="3.86632" BBK_DIFF_A="-0.01026"/>
      <bbk:Obs TIME_PERIOD="2008-03-27" OBS_VALUE="3.87658" BBK_DIFF_A="0.1346"/>
      <bbk:Obs TIME_PERIOD="2008-03-26" OBS_VALUE="3.74198" BBK_DIFF_A="0.09289"/>
      <bbk:Obs TIME_PERIOD="2008-03-25" OBS_VALUE="3.64909" BBK_DIFF_A="-0.183"/>
      <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="3.83209" BBK_DIFF_A="-0.23189"/>
      <bbk:Obs TIME_PERIOD="2008-03-19" OBS_VALUE="4.06398" BBK_DIFF_A="-0.92106"/>
      <bbk:Obs TIME_PERIOD="2008-03-18" OBS_VALUE="4.98504" BBK_DIFF_A="0.98598"/>
      <bbk:Obs TIME_PERIOD="2008-03-17" OBS_VALUE="3.99906" BBK_DIFF_A="0.43802"/>
      <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="3.56104" BBK_DIFF_A="-0.02495"/>
      <bbk:Obs TIME_PERIOD="2008-03-13" OBS_VALUE="3.58599" BBK_DIFF_A="0.21353"/>
      <bbk:Obs TIME_PERIOD="2008-03-12" OBS_VALUE="3.37246" BBK_DIFF_A="-0.19285"/>
      <bbk:Obs TIME_PERIOD="2008-03-11" OBS_VALUE="3.56531" BBK_DIFF_A="0.15398"/>
      <bbk:Obs TIME_PERIOD="2008-03-10" OBS_VALUE="3.41133" BBK_DIFF_A="7.92209"/>
      <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="-4.51076" BBK_DIFF_A="-9.422"/>
      <bbk:Obs TIME_PERIOD="2008-03-06" OBS_VALUE="4.91124" BBK_DIFF_A="-0.04392"/>
      <bbk:Obs TIME_PERIOD="2008-03-05" OBS_VALUE="4.95516" BBK_DIFF_A="0.17509"/>
      <bbk:Obs TIME_PERIOD="2008-03-04" OBS_VALUE="4.78007" BBK_DIFF_A="-0.30551"/>
      <bbk:Obs TIME_PERIOD="2008-03-03" OBS_VALUE="5.08558" BBK_DIFF_A="-0.03493"/>
      <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="5.12051" BBK_DIFF_A="9.04102"/>
      <bbk:Obs TIME_PERIOD="2008-02-28" OBS_VALUE="-3.92051" BBK_DIFF_A="0.08925"/>
      <bbk:Obs TIME_PERIOD="2008-02-27" OBS_VALUE="-4.00976" BBK_DIFF_A="-0.12974"/>
      <bbk:Obs TIME_PERIOD="2008-02-26" OBS_VALUE="-3.88002" BBK_DIFF_A="-0.02522"/>
      <bbk:Obs TIME_PERIOD="2008-02-25" OBS_VALUE="-3.8548" BBK_DIFF_A="0.0302"/>
      <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="-3.885" BBK_DIFF_A="0.09516"/>
      <bbk:Obs TIME_PERIOD="2008-02-21" OBS_VALUE="-3.98016" BBK_DIFF_A="0.20777"/>
      <bbk:Obs TIME_PERIOD="2008-02-20" OBS_VALUE="-4.18793" BBK_DIFF_A="0.0487"/>
      <bbk:Obs TIME_PERIOD="2008-02-19" OBS_VALUE="-4.23663" BBK_DIFF_A="0.01046"/>
      <bbk:Obs TIME_PERIOD="2008-02-18" OBS_VALUE="-4.24709" BBK_DIFF_A="0.10107"/>
      <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="-4.34816" BBK_DIFF_A="0.05922"/>
      <bbk:Obs TIME_PERIOD="2008-02-14" OBS_VALUE="-4.40738" BBK_DIFF_A="0.0444"/>
      <bbk:Obs TIME_PERIOD="2008-02-13" OBS_VALUE="-4.45178" BBK_DIFF_A="4.84534"/>
      <bbk:Obs TIME_PERIOD="2008-02-12" OBS_VALUE="-9.29712" BBK_DIFF_A="0.06657"/>
      <bbk:Obs TIME_PERIOD="2008-02-11" OBS_VALUE="-9.36369" BBK_DIFF_A="-0.11159"/>
      <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="-9.2521" BBK_DIFF_A="-0.14073"/>
      <bbk:Obs TIME_PERIOD="2008-02-07" OBS_VALUE="-9.11137" BBK_DIFF_A="0.10789"/>
      <bbk:Obs TIME_PERIOD="2008-02-06" OBS_VALUE="-9.21926" BBK_DIFF_A="0.22569"/>
      <bbk:Obs TIME_PERIOD="2008-02-05" OBS_VALUE="-9.44495" BBK_DIFF_A="-0.15609"/>
      <bbk:Obs TIME_PERIOD="2008-02-04" OBS_VALUE="-9.28886" BBK_DIFF_A="0.27678"/>
      <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="-9.56564" BBK_DIFF_A="-0.24439"/>
      <bbk:Obs TIME_PERIOD="2008-01-31" OBS_VALUE="-9.32125" BBK_DIFF_A="-0.14414"/>
      <bbk:Obs TIME_PERIOD="2008-01-30" OBS_VALUE="-9.17711" BBK_DIFF_A="-0.00722"/>
      <bbk:Obs TIME_PERIOD="2008-01-29" OBS_VALUE="-9.16989" BBK_DIFF_A="0.13686"/>
      <bbk:Obs TIME_PERIOD="2008-01-28" OBS_VALUE="-9.30675" BBK_DIFF_A="-0.11975"/>
      <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="-9.187" BBK_DIFF_A="0.07094"/>
      <bbk:Obs TIME_PERIOD="2008-01-24" OBS_VALUE="-9.25794" BBK_DIFF_A="-0.08545"/>
      <bbk:Obs TIME_PERIOD="2008-01-23" OBS_VALUE="-9.17249" BBK_DIFF_A="0.1986"/>
      <bbk:Obs TIME_PERIOD="2008-01-22" OBS_VALUE="-9.37109" BBK_DIFF_A="-0.55426"/>
      <bbk:Obs TIME_PERIOD="2008-01-21" OBS_VALUE="-8.81683" BBK_DIFF_A="0.4686"/>
      <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="-9.28543" BBK_DIFF_A="0.00255"/>
      <bbk:Obs TIME_PERIOD="2008-01-17" OBS_VALUE="-9.28798" BBK_DIFF_A="-0.2996"/>
      <bbk:Obs TIME_PERIOD="2008-01-16" OBS_VALUE="-8.98838" BBK_DIFF_A="0.28392"/>
      <bbk:Obs TIME_PERIOD="2008-01-15" OBS_VALUE="-9.2723" BBK_DIFF_A="0.11562"/>
      <bbk:Obs TIME_PERIOD="2008-01-14" OBS_VALUE="-9.38792" BBK_DIFF_A="-0.05144"/>
      <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="-9.33648" BBK_DIFF_A="-0.11855"/>
      <bbk:Obs TIME_PERIOD="2008-01-10" OBS_VALUE="-9.21793" BBK_DIFF_A="-0.1649"/>
      <bbk:Obs TIME_PERIOD="2008-01-09" OBS_VALUE="-9.05303" BBK_DIFF_A="0.06144"/>
      <bbk:Obs TIME_PERIOD="2008-01-08" OBS_VALUE="-9.11447" BBK_DIFF_A="0.39599"/>
      <bbk:Obs TIME_PERIOD="2008-01-07" OBS_VALUE="-9.51046" BBK_DIFF_A="-0.14209"/>
      <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="-9.36837" BBK_DIFF_A="-0.16672"/>
      <bbk:Obs TIME_PERIOD="2008-01-03" OBS_VALUE="-9.20165" BBK_DIFF_A="-0.02743"/>
      <bbk:Obs TIME_PERIOD="2008-01-02" OBS_VALUE="-9.17422" BBK_DIFF_A="0.14877"/>
      <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="-9.32299" BBK_DIFF_A="-1.34805"/>
      <bbk:Obs TIME_PERIOD="2007-12-27" OBS_VALUE="-7.97494" BBK_DIFF_A="0.10459"/>
      <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="-8.07953" BBK_DIFF_A="-0.00544"/>
      <bbk:Obs TIME_PERIOD="2007-12-20" OBS_VALUE="-8.07409" BBK_DIFF_A="-0.00309"/>
      <bbk:Obs TIME_PERIOD="2007-12-19" OBS_VALUE="-8.071" BBK_DIFF_A="0.11963"/>
      <bbk:Obs TIME_PERIOD="2007-12-18" OBS_VALUE="-8.19063" BBK_DIFF_A="-0.04943"/>
      <bbk:Obs TIME_PERIOD="2007-12-17" OBS_VALUE="-8.1412" BBK_DIFF_A="-0.20114"/>
      <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="-7.94006" BBK_DIFF_A="0.05269"/>
      <bbk:Obs TIME_PERIOD="2007-12-13" OBS_VALUE="-7.99275" BBK_DIFF_A="0.10058"/>
      <bbk:Obs TIME_PERIOD="2007-12-12" OBS_VALUE="-8.09333" BBK_DIFF_A="-0.03303"/>
      <bbk:Obs TIME_PERIOD="2007-12-11" OBS_VALUE="-8.0603" BBK_DIFF_A="0.06604"/>
      <bbk:Obs TIME_PERIOD="2007-12-10" OBS_VALUE="-8.12634" BBK_DIFF_A="-4.37498"/>
      <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="-3.75136" BBK_DIFF_A="0.25162"/>
      <bbk:Obs TIME_PERIOD="2007-12-06" OBS_VALUE="-4.00298" BBK_DIFF_A="3.82012"/>
      <bbk:Obs TIME_PERIOD="2007-12-05" OBS_VALUE="-7.8231" BBK_DIFF_A="0.07236"/>
      <bbk:Obs TIME_PERIOD="2007-12-04" OBS_VALUE="-7.89546" BBK_DIFF_A="-0.06537"/>
      <bbk:Obs TIME_PERIOD="2007-12-03" OBS_VALUE="-7.83009" BBK_DIFF_A="0.06986"/>
      <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="-7.89995" BBK_DIFF_A="0.24441"/>
      <bbk:Obs TIME_PERIOD="2007-11-29" OBS_VALUE="-8.14436" BBK_DIFF_A="1.22726"/>
      <bbk:Obs TIME_PERIOD="2007-11-28" OBS_VALUE="-9.37162" BBK_DIFF_A="0.0529"/>
      <bbk:Obs TIME_PERIOD="2007-11-27" OBS_VALUE="-9.42452" BBK_DIFF_A="0.2313"/>
      <bbk:Obs TIME_PERIOD="2007-11-26" OBS_VALUE="-9.65582" BBK_DIFF_A="-0.28042"/>
      <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="-9.3754" BBK_DIFF_A="0.08678"/>
      <bbk:Obs TIME_PERIOD="2007-11-22" OBS_VALUE="-9.46218" BBK_DIFF_A="-0.24165"/>
      <bbk:Obs TIME_PERIOD="2007-11-21" OBS_VALUE="-9.22053" BBK_DIFF_A="0.00194"/>
      <bbk:Obs TIME_PERIOD="2007-11-20" OBS_VALUE="-9.22247" BBK_DIFF_A="-0.07195"/>
      <bbk:Obs TIME_PERIOD="2007-11-19" OBS_VALUE="-9.15052" BBK_DIFF_A="0.3948"/>
      <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="-9.54532" BBK_DIFF_A="0.11139"/>
      <bbk:Obs TIME_PERIOD="2007-11-15" OBS_VALUE="-9.65671" BBK_DIFF_A="-0.13584"/>
      <bbk:Obs TIME_PERIOD="2007-11-14" OBS_VALUE="-9.52087" BBK_DIFF_A="0.12212"/>
      <bbk:Obs TIME_PERIOD="2007-11-13" OBS_VALUE="-9.64299" BBK_DIFF_A="0.04892"/>
      <bbk:Obs TIME_PERIOD="2007-11-12" OBS_VALUE="-9.69191" BBK_DIFF_A="-0.15586"/>
      <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="-9.53605" BBK_DIFF_A="-0.31038"/>
      <bbk:Obs TIME_PERIOD="2007-11-08" OBS_VALUE="-9.22567" BBK_DIFF_A="0.44745"/>
      <bbk:Obs TIME_PERIOD="2007-11-07" OBS_VALUE="-9.67312" BBK_DIFF_A="-0.33912"/>
      <bbk:Obs TIME_PERIOD="2007-11-06" OBS_VALUE="-9.334" BBK_DIFF_A="-0.03192"/>
      <bbk:Obs TIME_PERIOD="2007-11-05" OBS_VALUE="-9.30208" BBK_DIFF_A="0.2272"/>
      <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="-9.52928" BBK_DIFF_A="-0.22863"/>
      <bbk:Obs TIME_PERIOD="2007-11-01" OBS_VALUE="-9.30065" BBK_DIFF_A="0.10556"/>
      <bbk:Obs TIME_PERIOD="2007-10-31" OBS_VALUE="-9.40621" BBK_DIFF_A="0.04384"/>
      <bbk:Obs TIME_PERIOD="2007-10-30" OBS_VALUE="-9.45005" BBK_DIFF_A="0.29913"/>
      <bbk:Obs TIME_PERIOD="2007-10-29" OBS_VALUE="-9.74918" BBK_DIFF_A="-0.28729"/>
      <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="-9.46189" BBK_DIFF_A="-0.106"/>
      <bbk:Obs TIME_PERIOD="2007-10-25" OBS_VALUE="-9.35589" BBK_DIFF_A="-0.02244"/>
      <bbk:Obs TIME_PERIOD="2007-10-24" OBS_VALUE="-9.33345" BBK_DIFF_A="0.00495"/>
      <bbk:Obs TIME_PERIOD="2007-10-23" OBS_VALUE="-9.3384" BBK_DIFF_A="0.20697"/>
      <bbk:Obs TIME_PERIOD="2007-10-22" OBS_VALUE="-9.54537" BBK_DIFF_A="-0.07438"/>
      <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="-9.47099" BBK_DIFF_A="0.14944"/>
      <bbk:Obs TIME_PERIOD="2007-10-18" OBS_VALUE="-9.62043" BBK_DIFF_A="-0.03917"/>
      <bbk:Obs TIME_PERIOD="2007-10-17" OBS_VALUE="-9.58126" BBK_DIFF_A="0.1334"/>
      <bbk:Obs TIME_PERIOD="2007-10-16" OBS_VALUE="-9.71466" BBK_DIFF_A="-0.02916"/>
      <bbk:Obs TIME_PERIOD="2007-10-15" OBS_VALUE="-9.6855" BBK_DIFF_A="0.0544"/>
      <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="-9.7399" BBK_DIFF_A="0.05102"/>
      <bbk:Obs TIME_PERIOD="2007-10-11" OBS_VALUE="-9.79092" BBK_DIFF_A="-0.02377"/>
      <bbk:Obs TIME_PERIOD="2007-10-10" OBS_VALUE="-9.76715" BBK_DIFF_A="-0.01678"/>
      <bbk:Obs TIME_PERIOD="2007-10-09" OBS_VALUE="-9.75037" BBK_DIFF_A="-0.01224"/>
      <bbk:Obs TIME_PERIOD="2007-10-08" OBS_VALUE="-9.73813" BBK_DIFF_A="-0.07688"/>
      <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="-9.66125" BBK_DIFF_A="0.01581"/>
      <bbk:Obs TIME_PERIOD="2007-10-04" OBS_VALUE="-9.67706" BBK_DIFF_A="-0.03645"/>
      <bbk:Obs TIME_PERIOD="2007-10-03" OBS_VALUE="-9.64061" BBK_DIFF_A="0.02875"/>
      <bbk:Obs TIME_PERIOD="2007-10-02" OBS_VALUE="-9.66936" BBK_DIFF_A="0.05202"/>
      <bbk:Obs TIME_PERIOD="2007-10-01" OBS_VALUE="-9.72138" BBK_DIFF_A="-0.01959"/>
      <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="-9.70179" BBK_DIFF_A="-7.9485"/>
      <bbk:Obs TIME_PERIOD="2007-09-27" OBS_VALUE="-1.75329" BBK_DIFF_A="0.05362"/>
      <bbk:Obs TIME_PERIOD="2007-09-26" OBS_VALUE="-1.80691" BBK_DIFF_A="-0.03555"/>
      <bbk:Obs TIME_PERIOD="2007-09-25" OBS_VALUE="-1.77136" BBK_DIFF_A="7.76556"/>
      <bbk:Obs TIME_PERIOD="2007-09-24" OBS_VALUE="-9.53692" BBK_DIFF_A="-0.00516"/>
      <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="-9.53176" BBK_DIFF_A="-7.56368"/>
      <bbk:Obs TIME_PERIOD="2007-09-20" OBS_VALUE="-1.96808" BBK_DIFF_A="-3.70051"/>
      <bbk:Obs TIME_PERIOD="2007-09-19" OBS_VALUE="1.73243" BBK_DIFF_A="11.40261"/>
      <bbk:Obs TIME_PERIOD="2007-09-18" OBS_VALUE="-9.67018" BBK_DIFF_A="0.03579"/>
      <bbk:Obs TIME_PERIOD="2007-09-17" OBS_VALUE="-9.70597" BBK_DIFF_A="-0.19271"/>
      <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="-9.51326" BBK_DIFF_A="-0.16452"/>
      <bbk:Obs TIME_PERIOD="2007-09-13" OBS_VALUE="-9.34874" BBK_DIFF_A="0.12366"/>
      <bbk:Obs TIME_PERIOD="2007-09-12" OBS_VALUE="-9.4724" BBK_DIFF_A="0.13756"/>
      <bbk:Obs TIME_PERIOD="2007-09-11" OBS_VALUE="-9.60996" BBK_DIFF_A="-0.24503"/>
      <bbk:Obs TIME_PERIOD="2007-09-10" OBS_VALUE="-9.36493" BBK_DIFF_A="-0.11769"/>
      <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="-9.24724" BBK_DIFF_A="-0.02268"/>
      <bbk:Obs TIME_PERIOD="2007-09-06" OBS_VALUE="-9.22456" BBK_DIFF_A="0.13402"/>
      <bbk:Obs TIME_PERIOD="2007-09-05" OBS_VALUE="-9.35858" BBK_DIFF_A="-0.12679"/>
      <bbk:Obs TIME_PERIOD="2007-09-04" OBS_VALUE="-9.23179" BBK_DIFF_A="-0.05264"/>
      <bbk:Obs TIME_PERIOD="2007-09-03" OBS_VALUE="-9.17915" BBK_DIFF_A="0.18346"/>
      <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="-9.36261" BBK_DIFF_A="-0.19855"/>
      <bbk:Obs TIME_PERIOD="2007-08-30" OBS_VALUE="-9.16406" BBK_DIFF_A="0.115"/>
      <bbk:Obs TIME_PERIOD="2007-08-29" OBS_VALUE="-9.27906" BBK_DIFF_A="-0.01811"/>
      <bbk:Obs TIME_PERIOD="2007-08-28" OBS_VALUE="-9.26095" BBK_DIFF_A="-9.99643"/>
      <bbk:Obs TIME_PERIOD="2007-08-27" OBS_VALUE="0.73548" BBK_DIFF_A="-0.29686"/>
      <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="1.03234" BBK_DIFF_A="0.16792"/>
      <bbk:Obs TIME_PERIOD="2007-08-23" OBS_VALUE="0.86442" BBK_DIFF_A="-0.22428"/>
      <bbk:Obs TIME_PERIOD="2007-08-22" OBS_VALUE="1.0887" BBK_DIFF_A="-0.00278"/>
      <bbk:Obs TIME_PERIOD="2007-08-21" OBS_VALUE="1.09148" BBK_DIFF_A="2.8867"/>
      <bbk:Obs TIME_PERIOD="2007-08-20" OBS_VALUE="-1.79522" BBK_DIFF_A="7.38389"/>
      <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="-9.17911" BBK_DIFF_A="-8.08562"/>
      <bbk:Obs TIME_PERIOD="2007-08-16" OBS_VALUE="-1.09349" BBK_DIFF_A="-0.46876"/>
      <bbk:Obs TIME_PERIOD="2007-08-15" OBS_VALUE="-0.62473" BBK_DIFF_A="0.49414"/>
      <bbk:Obs TIME_PERIOD="2007-08-14" OBS_VALUE="-1.11887" BBK_DIFF_A="0.01928"/>
      <bbk:Obs TIME_PERIOD="2007-08-13" OBS_VALUE="-1.13815" BBK_DIFF_A="0.14129"/>
      <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="-1.27944" BBK_DIFF_A="-0.37754"/>
      <bbk:Obs TIME_PERIOD="2007-08-09" OBS_VALUE="-0.9019" BBK_DIFF_A="-0.04645"/>
      <bbk:Obs TIME_PERIOD="2007-08-08" OBS_VALUE="-0.85545" BBK_DIFF_A="0.16423"/>
      <bbk:Obs TIME_PERIOD="2007-08-07" OBS_VALUE="-1.01968" BBK_DIFF_A="-0.05168"/>
      <bbk:Obs TIME_PERIOD="2007-08-06" OBS_VALUE="-0.968" BBK_DIFF_A="0.01089"/>
      <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="-0.97889" BBK_DIFF_A="-0.16834"/>
      <bbk:Obs TIME_PERIOD="2007-08-02" OBS_VALUE="-0.81055" BBK_DIFF_A="0.15676"/>
      <bbk:Obs TIME_PERIOD="2007-08-01" OBS_VALUE="-0.96731" BBK_DIFF_A="-0.13044"/>
      <bbk:Obs TIME_PERIOD="2007-07-31" OBS_VALUE="-0.83687" BBK_DIFF_A="0.03209"/>
      <bbk:Obs TIME_PERIOD="2007-07-30" OBS_VALUE="-0.86896" BBK_DIFF_A="-0.01444"/>
      <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="-0.85452" BBK_DIFF_A="-0.17858"/>
      <bbk:Obs TIME_PERIOD="2007-07-26" OBS_VALUE="-0.67594" BBK_DIFF_A="-0.01723"/>
      <bbk:Obs TIME_PERIOD="2007-07-25" OBS_VALUE="-0.65871" BBK_DIFF_A="-0.06957"/>
      <bbk:Obs TIME_PERIOD="2007-07-24" OBS_VALUE="-0.58914" BBK_DIFF_A="0.21948"/>
      <bbk:Obs TIME_PERIOD="2007-07-23" OBS_VALUE="-0.80862" BBK_DIFF_A="-0.40315"/>
      <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="-0.40547" BBK_DIFF_A="0.00445"/>
      <bbk:Obs TIME_PERIOD="2007-07-19" OBS_VALUE="-0.40992" BBK_DIFF_A="0.04921"/>
      <bbk:Obs TIME_PERIOD="2007-07-18" OBS_VALUE="-0.45913" BBK_DIFF_A="0.02219"/>
      <bbk:Obs TIME_PERIOD="2007-07-17" OBS_VALUE="-0.48132" BBK_DIFF_A="-0.05778"/>
      <bbk:Obs TIME_PERIOD="2007-07-16" OBS_VALUE="-0.42354" BBK_DIFF_A="0.34166"/>
      <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="-0.7652" BBK_DIFF_A="-0.26628"/>
      <bbk:Obs TIME_PERIOD="2007-07-12" OBS_VALUE="-0.49892" BBK_DIFF_A="0.09137"/>
      <bbk:Obs TIME_PERIOD="2007-07-11" OBS_VALUE="-0.59029" BBK_DIFF_A="19.32764"/>
      <bbk:Obs TIME_PERIOD="2007-07-10" OBS_VALUE="-19.91793" BBK_DIFF_A="-0.03444"/>
      <bbk:Obs TIME_PERIOD="2007-07-09" OBS_VALUE="-19.88349" BBK_DIFF_A="-0.03678"/>
      <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="-19.84671" BBK_DIFF_A="-16.56565"/>
      <bbk:Obs TIME_PERIOD="2007-07-05" OBS_VALUE="-3.28106" BBK_DIFF_A="-2.70879"/>
      <bbk:Obs TIME_PERIOD="2007-07-04" OBS_VALUE="-0.57227" BBK_DIFF_A="0.10672"/>
      <bbk:Obs TIME_PERIOD="2007-07-03" OBS_VALUE="-0.67899" BBK_DIFF_A="-0.07004"/>
      <bbk:Obs TIME_PERIOD="2007-07-02" OBS_VALUE="-0.60895" BBK_DIFF_A="0.05031"/>
      <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="-0.65926" BBK_DIFF_A="17.50152"/>
      <bbk:Obs TIME_PERIOD="2007-06-28" OBS_VALUE="-18.16078" BBK_DIFF_A="-17.43171"/>
      <bbk:Obs TIME_PERIOD="2007-06-27" OBS_VALUE="-0.72907" BBK_DIFF_A="0.02321"/>
      <bbk:Obs TIME_PERIOD="2007-06-26" OBS_VALUE="-0.75228" BBK_DIFF_A="-0.0345"/>
      <bbk:Obs TIME_PERIOD="2007-06-25" OBS_VALUE="-0.71778" BBK_DIFF_A="-0.15475"/>
      <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="-0.56303" BBK_DIFF_A="-0.05097"/>
      <bbk:Obs TIME_PERIOD="2007-06-21" OBS_VALUE="-0.51206" BBK_DIFF_A="0.11053"/>
      <bbk:Obs TIME_PERIOD="2007-06-20" OBS_VALUE="-0.62259" BBK_DIFF_A="14.79165"/>
      <bbk:Obs TIME_PERIOD="2007-06-19" OBS_VALUE="-15.41424" BBK_DIFF_A="-13.03314"/>
      <bbk:Obs TIME_PERIOD="2007-06-18" OBS_VALUE="-2.3811" BBK_DIFF_A="-1.95515"/>
      <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="-0.42595" BBK_DIFF_A="0.03652"/>
      <bbk:Obs TIME_PERIOD="2007-06-14" OBS_VALUE="-0.46247" BBK_DIFF_A="0.01586"/>
      <bbk:Obs TIME_PERIOD="2007-06-13" OBS_VALUE="-0.47833" BBK_DIFF_A="0.06976"/>
      <bbk:Obs TIME_PERIOD="2007-06-12" OBS_VALUE="-0.54809" BBK_DIFF_A="0.01171"/>
      <bbk:Obs TIME_PERIOD="2007-06-11" OBS_VALUE="-0.5598" BBK_DIFF_A="-0.04859"/>
      <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="-0.51121" BBK_DIFF_A="0.28246"/>
      <bbk:Obs TIME_PERIOD="2007-06-07" OBS_VALUE="-0.79367" BBK_DIFF_A="-0.1437"/>
      <bbk:Obs TIME_PERIOD="2007-06-06" OBS_VALUE="-0.64997" BBK_DIFF_A="0.06777"/>
      <bbk:Obs TIME_PERIOD="2007-06-05" OBS_VALUE="-0.71774" BBK_DIFF_A="-0.0396"/>
      <bbk:Obs TIME_PERIOD="2007-06-04" OBS_VALUE="-0.67814" BBK_DIFF_A="0.14392"/>
      <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="-0.82206" BBK_DIFF_A="0.02304"/>
      <bbk:Obs TIME_PERIOD="2007-05-31" OBS_VALUE="-0.8451" BBK_DIFF_A="-0.25747"/>
      <bbk:Obs TIME_PERIOD="2007-05-30" OBS_VALUE="-0.58763" BBK_DIFF_A="0.06307"/>
      <bbk:Obs TIME_PERIOD="2007-05-29" OBS_VALUE="-0.6507" BBK_DIFF_A="-0.1653"/>
      <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="-0.4854" BBK_DIFF_A="0.05411"/>
      <bbk:Obs TIME_PERIOD="2007-05-24" OBS_VALUE="-0.53951" BBK_DIFF_A="0.11697"/>
      <bbk:Obs TIME_PERIOD="2007-05-23" OBS_VALUE="-0.65648" BBK_DIFF_A="0.09317"/>
      <bbk:Obs TIME_PERIOD="2007-05-22" OBS_VALUE="-0.74965" BBK_DIFF_A="0.01535"/>
      <bbk:Obs TIME_PERIOD="2007-05-21" OBS_VALUE="-0.765" BBK_DIFF_A="-0.13249"/>
      <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="-0.63251" BBK_DIFF_A="0.09843"/>
      <bbk:Obs TIME_PERIOD="2007-05-17" OBS_VALUE="-0.73094" BBK_DIFF_A="-0.13532"/>
      <bbk:Obs TIME_PERIOD="2007-05-16" OBS_VALUE="-0.59562" BBK_DIFF_A="0.1221"/>
      <bbk:Obs TIME_PERIOD="2007-05-15" OBS_VALUE="-0.71772" BBK_DIFF_A="0.16774"/>
      <bbk:Obs TIME_PERIOD="2007-05-14" OBS_VALUE="-0.88546" BBK_DIFF_A="-0.01147"/>
      <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="-0.87399" BBK_DIFF_A="-0.04906"/>
      <bbk:Obs TIME_PERIOD="2007-05-10" OBS_VALUE="-0.82493" BBK_DIFF_A="0.06308"/>
      <bbk:Obs TIME_PERIOD="2007-05-09" OBS_VALUE="-0.88801" BBK_DIFF_A="0.01944"/>
      <bbk:Obs TIME_PERIOD="2007-05-08" OBS_VALUE="-0.90745" BBK_DIFF_A="0.02614"/>
      <bbk:Obs TIME_PERIOD="2007-05-07" OBS_VALUE="-0.93359" BBK_DIFF_A="-0.03868"/>
      <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="-0.89491" BBK_DIFF_A="0.16564"/>
      <bbk:Obs TIME_PERIOD="2007-05-03" OBS_VALUE="-1.06055" BBK_DIFF_A="0.04313"/>
      <bbk:Obs TIME_PERIOD="2007-05-02" OBS_VALUE="-1.10368" BBK_DIFF_A="-0.06026"/>
      <bbk:Obs TIME_PERIOD="2007-05-01" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2007-04-30" OBS_VALUE="-1.04342" BBK_DIFF_A="-0.15192"/>
      <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="-0.8915" BBK_DIFF_A="-0.03073"/>
      <bbk:Obs TIME_PERIOD="2007-04-26" OBS_VALUE="-0.86077" BBK_DIFF_A="0.11643"/>
      <bbk:Obs TIME_PERIOD="2007-04-25" OBS_VALUE="-0.9772" BBK_DIFF_A="0.07487"/>
      <bbk:Obs TIME_PERIOD="2007-04-24" OBS_VALUE="-1.05207" BBK_DIFF_A="-0.01997"/>
      <bbk:Obs TIME_PERIOD="2007-04-23" OBS_VALUE="-1.0321" BBK_DIFF_A="0.02606"/>
      <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="-1.05816" BBK_DIFF_A="0.12505"/>
      <bbk:Obs TIME_PERIOD="2007-04-19" OBS_VALUE="-1.18321" BBK_DIFF_A="-0.12698"/>
      <bbk:Obs TIME_PERIOD="2007-04-18" OBS_VALUE="-1.05623" BBK_DIFF_A="-0.10061"/>
      <bbk:Obs TIME_PERIOD="2007-04-17" OBS_VALUE="-0.95562" BBK_DIFF_A="-0.06099"/>
      <bbk:Obs TIME_PERIOD="2007-04-16" OBS_VALUE="-0.89463" BBK_DIFF_A="0.03171"/>
      <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="-0.92634" BBK_DIFF_A="0.07813"/>
      <bbk:Obs TIME_PERIOD="2007-04-12" OBS_VALUE="-1.00447" BBK_DIFF_A="0.05478"/>
      <bbk:Obs TIME_PERIOD="2007-04-11" OBS_VALUE="-1.05925" BBK_DIFF_A="0.05119"/>
      <bbk:Obs TIME_PERIOD="2007-04-10" OBS_VALUE="-1.11044" BBK_DIFF_A="0.10499"/>
      <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="-1.21543" BBK_DIFF_A="-0.0816"/>
      <bbk:Obs TIME_PERIOD="2007-04-04" OBS_VALUE="-1.13383" BBK_DIFF_A="0.02666"/>
      <bbk:Obs TIME_PERIOD="2007-04-03" OBS_VALUE="-1.16049" BBK_DIFF_A="0.11846"/>
      <bbk:Obs TIME_PERIOD="2007-04-02" OBS_VALUE="-1.27895" BBK_DIFF_A="-0.06667"/>
      <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="-1.21228" BBK_DIFF_A="-0.00814"/>
      <bbk:Obs TIME_PERIOD="2007-03-29" OBS_VALUE="-1.20414" BBK_DIFF_A="0.20025"/>
      <bbk:Obs TIME_PERIOD="2007-03-28" OBS_VALUE="-1.40439" BBK_DIFF_A="-0.00972"/>
      <bbk:Obs TIME_PERIOD="2007-03-27" OBS_VALUE="-1.39467" BBK_DIFF_A="-0.00695"/>
      <bbk:Obs TIME_PERIOD="2007-03-26" OBS_VALUE="-1.38772" BBK_DIFF_A="0.16464"/>
      <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="-1.55236" BBK_DIFF_A="-0.01578"/>
      <bbk:Obs TIME_PERIOD="2007-03-22" OBS_VALUE="-1.53658" BBK_DIFF_A="-0.00204"/>
      <bbk:Obs TIME_PERIOD="2007-03-21" OBS_VALUE="-1.53454" BBK_DIFF_A="-0.10594"/>
      <bbk:Obs TIME_PERIOD="2007-03-20" OBS_VALUE="-1.4286" BBK_DIFF_A="0.09878"/>
      <bbk:Obs TIME_PERIOD="2007-03-19" OBS_VALUE="-1.52738" BBK_DIFF_A="0.11952"/>
      <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="-1.6469" BBK_DIFF_A="-3.7E-4"/>
      <bbk:Obs TIME_PERIOD="2007-03-15" OBS_VALUE="-1.64653" BBK_DIFF_A="0.12523"/>
      <bbk:Obs TIME_PERIOD="2007-03-14" OBS_VALUE="-1.77176" BBK_DIFF_A="-0.14727"/>
      <bbk:Obs TIME_PERIOD="2007-03-13" OBS_VALUE="-1.62449" BBK_DIFF_A="-0.10622"/>
      <bbk:Obs TIME_PERIOD="2007-03-12" OBS_VALUE="-1.51827" BBK_DIFF_A="0.19782"/>
      <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="-1.71609" BBK_DIFF_A="6.82972"/>
      <bbk:Obs TIME_PERIOD="2007-03-08" OBS_VALUE="-8.54581" BBK_DIFF_A="0.00368"/>
      <bbk:Obs TIME_PERIOD="2007-03-07" OBS_VALUE="-8.54949" BBK_DIFF_A="-0.16004"/>
      <bbk:Obs TIME_PERIOD="2007-03-06" OBS_VALUE="-8.38945" BBK_DIFF_A="0.42581"/>
      <bbk:Obs TIME_PERIOD="2007-03-05" OBS_VALUE="-8.81526" BBK_DIFF_A="-7.30009"/>
      <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="-1.51517" BBK_DIFF_A="-0.05499"/>
      <bbk:Obs TIME_PERIOD="2007-03-01" OBS_VALUE="-1.46018" BBK_DIFF_A="-0.02915"/>
      <bbk:Obs TIME_PERIOD="2007-02-28" OBS_VALUE="-1.43103" BBK_DIFF_A="-0.05985"/>
      <bbk:Obs TIME_PERIOD="2007-02-27" OBS_VALUE="-1.37118" BBK_DIFF_A="-0.06366"/>
      <bbk:Obs TIME_PERIOD="2007-02-26" OBS_VALUE="-1.30752" BBK_DIFF_A="-0.19656"/>
      <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="-1.11096" BBK_DIFF_A="0.16097"/>
      <bbk:Obs TIME_PERIOD="2007-02-22" OBS_VALUE="-1.27193" BBK_DIFF_A="0.01353"/>
      <bbk:Obs TIME_PERIOD="2007-02-21" OBS_VALUE="-1.28546" BBK_DIFF_A="-0.14227"/>
      <bbk:Obs TIME_PERIOD="2007-02-20" OBS_VALUE="-1.14319" BBK_DIFF_A="0.20851"/>
      <bbk:Obs TIME_PERIOD="2007-02-19" OBS_VALUE="-1.3517" BBK_DIFF_A="0.06671"/>
      <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="-1.41841" BBK_DIFF_A="-0.14159"/>
      <bbk:Obs TIME_PERIOD="2007-02-15" OBS_VALUE="-1.27682" BBK_DIFF_A="-0.0638"/>
      <bbk:Obs TIME_PERIOD="2007-02-14" OBS_VALUE="-1.21302" BBK_DIFF_A="0.03498"/>
      <bbk:Obs TIME_PERIOD="2007-02-13" OBS_VALUE="-1.248" BBK_DIFF_A="-0.01533"/>
      <bbk:Obs TIME_PERIOD="2007-02-12" OBS_VALUE="-1.23267" BBK_DIFF_A="0.18981"/>
      <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="-1.42248" BBK_DIFF_A="0.02766"/>
      <bbk:Obs TIME_PERIOD="2007-02-08" OBS_VALUE="-1.45014" BBK_DIFF_A="0.03997"/>
      <bbk:Obs TIME_PERIOD="2007-02-07" OBS_VALUE="-1.49011" BBK_DIFF_A="0.04395"/>
      <bbk:Obs TIME_PERIOD="2007-02-06" OBS_VALUE="-1.53406" BBK_DIFF_A="-0.02794"/>
      <bbk:Obs TIME_PERIOD="2007-02-05" OBS_VALUE="-1.50612" BBK_DIFF_A="-0.23222"/>
      <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="-1.2739" BBK_DIFF_A="0.01939"/>
      <bbk:Obs TIME_PERIOD="2007-02-01" OBS_VALUE="-1.29329" BBK_DIFF_A="0.04562"/>
      <bbk:Obs TIME_PERIOD="2007-01-31" OBS_VALUE="-1.33891" BBK_DIFF_A="-0.01578"/>
      <bbk:Obs TIME_PERIOD="2007-01-30" OBS_VALUE="-1.32313" BBK_DIFF_A="-0.15522"/>
      <bbk:Obs TIME_PERIOD="2007-01-29" OBS_VALUE="-1.16791" BBK_DIFF_A="-0.01059"/>
      <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="-1.15732" BBK_DIFF_A="0.08085"/>
      <bbk:Obs TIME_PERIOD="2007-01-25" OBS_VALUE="-1.23817" BBK_DIFF_A="-0.0163"/>
      <bbk:Obs TIME_PERIOD="2007-01-24" OBS_VALUE="-1.22187" BBK_DIFF_A="0.12043"/>
      <bbk:Obs TIME_PERIOD="2007-01-23" OBS_VALUE="-1.3423" BBK_DIFF_A="-0.10747"/>
      <bbk:Obs TIME_PERIOD="2007-01-22" OBS_VALUE="-1.23483" BBK_DIFF_A="0.11508"/>
      <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="-1.34991" BBK_DIFF_A="-0.09269"/>
      <bbk:Obs TIME_PERIOD="2007-01-18" OBS_VALUE="-1.25722" BBK_DIFF_A="0.10418"/>
      <bbk:Obs TIME_PERIOD="2007-01-17" OBS_VALUE="-1.3614" BBK_DIFF_A="-0.01195"/>
      <bbk:Obs TIME_PERIOD="2007-01-16" OBS_VALUE="-1.34945" BBK_DIFF_A="-0.07784"/>
      <bbk:Obs TIME_PERIOD="2007-01-15" OBS_VALUE="-1.27161" BBK_DIFF_A="0.03003"/>
      <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="-1.30164" BBK_DIFF_A="0.00787"/>
      <bbk:Obs TIME_PERIOD="2007-01-11" OBS_VALUE="-1.30951" BBK_DIFF_A="-0.04123"/>
      <bbk:Obs TIME_PERIOD="2007-01-10" OBS_VALUE="-1.26828" BBK_DIFF_A="-0.01157"/>
      <bbk:Obs TIME_PERIOD="2007-01-09" OBS_VALUE="-1.25671" BBK_DIFF_A="0.0197"/>
      <bbk:Obs TIME_PERIOD="2007-01-08" OBS_VALUE="-1.27641" BBK_DIFF_A="0.0399"/>
      <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="-1.31631" BBK_DIFF_A="0.0155"/>
      <bbk:Obs TIME_PERIOD="2007-01-04" OBS_VALUE="-1.33181" BBK_DIFF_A="-0.06915"/>
      <bbk:Obs TIME_PERIOD="2007-01-03" OBS_VALUE="-1.26266" BBK_DIFF_A="0.1099"/>
      <bbk:Obs TIME_PERIOD="2007-01-02" OBS_VALUE="-1.37256" BBK_DIFF_A="-0.15447"/>
      <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="-1.21809" BBK_DIFF_A="-0.21075"/>
      <bbk:Obs TIME_PERIOD="2006-12-28" OBS_VALUE="-1.00734" BBK_DIFF_A="0.01998"/>
      <bbk:Obs TIME_PERIOD="2006-12-27" OBS_VALUE="-1.02732" BBK_DIFF_A="0.0124"/>
      <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="-1.03972" BBK_DIFF_A="-0.00698"/>
      <bbk:Obs TIME_PERIOD="2006-12-21" OBS_VALUE="-1.03274" BBK_DIFF_A="0.02819"/>
      <bbk:Obs TIME_PERIOD="2006-12-20" OBS_VALUE="-1.06093" BBK_DIFF_A="0.00933"/>
      <bbk:Obs TIME_PERIOD="2006-12-19" OBS_VALUE="-1.07026" BBK_DIFF_A="-0.03986"/>
      <bbk:Obs TIME_PERIOD="2006-12-18" OBS_VALUE="-1.0304" BBK_DIFF_A="-0.14274"/>
      <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="-0.88766" BBK_DIFF_A="0.31055"/>
      <bbk:Obs TIME_PERIOD="2006-12-14" OBS_VALUE="-1.19821" BBK_DIFF_A="0.00229"/>
      <bbk:Obs TIME_PERIOD="2006-12-13" OBS_VALUE="-1.2005" BBK_DIFF_A="0.0142"/>
      <bbk:Obs TIME_PERIOD="2006-12-12" OBS_VALUE="-1.2147" BBK_DIFF_A="0.03004"/>
      <bbk:Obs TIME_PERIOD="2006-12-11" OBS_VALUE="-1.24474" BBK_DIFF_A="0.08754"/>
      <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="-1.33228" BBK_DIFF_A="0.18463"/>
      <bbk:Obs TIME_PERIOD="2006-12-07" OBS_VALUE="-1.51691" BBK_DIFF_A="0.06633"/>
      <bbk:Obs TIME_PERIOD="2006-12-06" OBS_VALUE="-1.58324" BBK_DIFF_A="-0.0253"/>
      <bbk:Obs TIME_PERIOD="2006-12-05" OBS_VALUE="-1.55794" BBK_DIFF_A="-0.05676"/>
      <bbk:Obs TIME_PERIOD="2006-12-04" OBS_VALUE="-1.50118" BBK_DIFF_A="0.01577"/>
      <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="-1.51695" BBK_DIFF_A="-0.06217"/>
      <bbk:Obs TIME_PERIOD="2006-11-30" OBS_VALUE="-1.45478" BBK_DIFF_A="0.08505"/>
      <bbk:Obs TIME_PERIOD="2006-11-29" OBS_VALUE="-1.53983" BBK_DIFF_A="-6.6E-4"/>
      <bbk:Obs TIME_PERIOD="2006-11-28" OBS_VALUE="-1.53917" BBK_DIFF_A="-0.02807"/>
      <bbk:Obs TIME_PERIOD="2006-11-27" OBS_VALUE="-1.5111" BBK_DIFF_A="0.0244"/>
      <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="-1.5355" BBK_DIFF_A="-0.01186"/>
      <bbk:Obs TIME_PERIOD="2006-11-23" OBS_VALUE="-1.52364" BBK_DIFF_A="-0.03929"/>
      <bbk:Obs TIME_PERIOD="2006-11-22" OBS_VALUE="-1.48435" BBK_DIFF_A="-0.05131"/>
      <bbk:Obs TIME_PERIOD="2006-11-21" OBS_VALUE="-1.43304" BBK_DIFF_A="0.0891"/>
      <bbk:Obs TIME_PERIOD="2006-11-20" OBS_VALUE="-1.52214" BBK_DIFF_A="-0.07213"/>
      <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="-1.45001" BBK_DIFF_A="0.18692"/>
      <bbk:Obs TIME_PERIOD="2006-11-16" OBS_VALUE="-1.63693" BBK_DIFF_A="0.05298"/>
      <bbk:Obs TIME_PERIOD="2006-11-15" OBS_VALUE="-1.68991" BBK_DIFF_A="-0.14495"/>
      <bbk:Obs TIME_PERIOD="2006-11-14" OBS_VALUE="-1.54496" BBK_DIFF_A="0.15594"/>
      <bbk:Obs TIME_PERIOD="2006-11-13" OBS_VALUE="-1.7009" BBK_DIFF_A="9.5E-4"/>
      <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="-1.70185" BBK_DIFF_A="-0.09311"/>
      <bbk:Obs TIME_PERIOD="2006-11-09" OBS_VALUE="-1.60874" BBK_DIFF_A="-0.01547"/>
      <bbk:Obs TIME_PERIOD="2006-11-08" OBS_VALUE="-1.59327" BBK_DIFF_A="-0.13843"/>
      <bbk:Obs TIME_PERIOD="2006-11-07" OBS_VALUE="-1.45484" BBK_DIFF_A="-0.0772"/>
      <bbk:Obs TIME_PERIOD="2006-11-06" OBS_VALUE="-1.37764" BBK_DIFF_A="0.32282"/>
      <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="-1.70046" BBK_DIFF_A="-0.07397"/>
      <bbk:Obs TIME_PERIOD="2006-11-02" OBS_VALUE="-1.62649" BBK_DIFF_A="-0.05708"/>
      <bbk:Obs TIME_PERIOD="2006-11-01" OBS_VALUE="-1.56941" BBK_DIFF_A="0.0236"/>
      <bbk:Obs TIME_PERIOD="2006-10-31" OBS_VALUE="-1.59301" BBK_DIFF_A="0.03904"/>
      <bbk:Obs TIME_PERIOD="2006-10-30" OBS_VALUE="-1.63205" BBK_DIFF_A="-0.18801"/>
      <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="-1.44404" BBK_DIFF_A="-0.09268"/>
      <bbk:Obs TIME_PERIOD="2006-10-26" OBS_VALUE="-1.35136" BBK_DIFF_A="6.3E-4"/>
      <bbk:Obs TIME_PERIOD="2006-10-25" OBS_VALUE="-1.35199" BBK_DIFF_A="0.01155"/>
      <bbk:Obs TIME_PERIOD="2006-10-24" OBS_VALUE="-1.36354" BBK_DIFF_A="0.05623"/>
      <bbk:Obs TIME_PERIOD="2006-10-23" OBS_VALUE="-1.41977" BBK_DIFF_A="0.10298"/>
      <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="-1.52275" BBK_DIFF_A="0.05405"/>
      <bbk:Obs TIME_PERIOD="2006-10-19" OBS_VALUE="-1.5768" BBK_DIFF_A="-0.017"/>
      <bbk:Obs TIME_PERIOD="2006-10-18" OBS_VALUE="-1.5598" BBK_DIFF_A="-0.01163"/>
      <bbk:Obs TIME_PERIOD="2006-10-17" OBS_VALUE="-1.54817" BBK_DIFF_A="-0.00143"/>
      <bbk:Obs TIME_PERIOD="2006-10-16" OBS_VALUE="-1.54674" BBK_DIFF_A="0.096"/>
      <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="-1.64274" BBK_DIFF_A="-0.02173"/>
      <bbk:Obs TIME_PERIOD="2006-10-12" OBS_VALUE="-1.62101" BBK_DIFF_A="0.09408"/>
      <bbk:Obs TIME_PERIOD="2006-10-11" OBS_VALUE="-1.71509" BBK_DIFF_A="0.24338"/>
      <bbk:Obs TIME_PERIOD="2006-10-10" OBS_VALUE="-1.95847" BBK_DIFF_A="-0.01792"/>
      <bbk:Obs TIME_PERIOD="2006-10-09" OBS_VALUE="-1.94055" BBK_DIFF_A="0.05615"/>
      <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="-1.9967" BBK_DIFF_A="-0.02025"/>
      <bbk:Obs TIME_PERIOD="2006-10-05" OBS_VALUE="-1.97645" BBK_DIFF_A="-0.1291"/>
      <bbk:Obs TIME_PERIOD="2006-10-04" OBS_VALUE="-1.84735" BBK_DIFF_A="0.03269"/>
      <bbk:Obs TIME_PERIOD="2006-10-03" OBS_VALUE="-1.88004" BBK_DIFF_A="-0.01683"/>
      <bbk:Obs TIME_PERIOD="2006-10-02" OBS_VALUE="-1.86321" BBK_DIFF_A="0.17494"/>
      <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="-2.03815" BBK_DIFF_A="-0.02953"/>
      <bbk:Obs TIME_PERIOD="2006-09-28" OBS_VALUE="-2.00862" BBK_DIFF_A="0.2424"/>
      <bbk:Obs TIME_PERIOD="2006-09-27" OBS_VALUE="-2.25102" BBK_DIFF_A="0.24954"/>
      <bbk:Obs TIME_PERIOD="2006-09-26" OBS_VALUE="-2.50056" BBK_DIFF_A="-0.04575"/>
      <bbk:Obs TIME_PERIOD="2006-09-25" OBS_VALUE="-2.45481" BBK_DIFF_A="-0.27751"/>
      <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="-2.1773" BBK_DIFF_A="-0.25863"/>
      <bbk:Obs TIME_PERIOD="2006-09-21" OBS_VALUE="-1.91867" BBK_DIFF_A="-0.00954"/>
      <bbk:Obs TIME_PERIOD="2006-09-20" OBS_VALUE="-1.90913" BBK_DIFF_A="-0.1514"/>
      <bbk:Obs TIME_PERIOD="2006-09-19" OBS_VALUE="-1.75773" BBK_DIFF_A="0.04824"/>
      <bbk:Obs TIME_PERIOD="2006-09-18" OBS_VALUE="-1.80597" BBK_DIFF_A="0.07448"/>
      <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="-1.88045" BBK_DIFF_A="0.14445"/>
      <bbk:Obs TIME_PERIOD="2006-09-14" OBS_VALUE="-2.0249" BBK_DIFF_A="0.04018"/>
      <bbk:Obs TIME_PERIOD="2006-09-13" OBS_VALUE="-2.06508" BBK_DIFF_A="0.04206"/>
      <bbk:Obs TIME_PERIOD="2006-09-12" OBS_VALUE="-2.10714" BBK_DIFF_A="-0.03221"/>
      <bbk:Obs TIME_PERIOD="2006-09-11" OBS_VALUE="-2.07493" BBK_DIFF_A="0.02965"/>
      <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="-2.10458" BBK_DIFF_A="-0.06601"/>
      <bbk:Obs TIME_PERIOD="2006-09-07" OBS_VALUE="-2.03857" BBK_DIFF_A="0.23002"/>
      <bbk:Obs TIME_PERIOD="2006-09-06" OBS_VALUE="-2.26859" BBK_DIFF_A="0.1104"/>
      <bbk:Obs TIME_PERIOD="2006-09-05" OBS_VALUE="-2.37899" BBK_DIFF_A="0.02138"/>
      <bbk:Obs TIME_PERIOD="2006-09-04" OBS_VALUE="-2.40037" BBK_DIFF_A="-0.06692"/>
      <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="-2.33345" BBK_DIFF_A="-0.33218"/>
      <bbk:Obs TIME_PERIOD="2006-08-31" OBS_VALUE="-2.00127" BBK_DIFF_A="0.18478"/>
      <bbk:Obs TIME_PERIOD="2006-08-30" OBS_VALUE="-2.18605" BBK_DIFF_A="0.09071"/>
      <bbk:Obs TIME_PERIOD="2006-08-29" OBS_VALUE="-2.27676" BBK_DIFF_A="0.03657"/>
      <bbk:Obs TIME_PERIOD="2006-08-28" OBS_VALUE="-2.31333" BBK_DIFF_A="-0.00924"/>
      <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="-2.30409" BBK_DIFF_A="-0.1775"/>
      <bbk:Obs TIME_PERIOD="2006-08-24" OBS_VALUE="-2.12659" BBK_DIFF_A="0.04764"/>
      <bbk:Obs TIME_PERIOD="2006-08-23" OBS_VALUE="-2.17423" BBK_DIFF_A="-0.10067"/>
      <bbk:Obs TIME_PERIOD="2006-08-22" OBS_VALUE="-2.07356" BBK_DIFF_A="-0.15461"/>
      <bbk:Obs TIME_PERIOD="2006-08-21" OBS_VALUE="-1.91895" BBK_DIFF_A="-0.00657"/>
      <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="-1.91238" BBK_DIFF_A="-0.07989"/>
      <bbk:Obs TIME_PERIOD="2006-08-17" OBS_VALUE="-1.83249" BBK_DIFF_A="-0.06346"/>
      <bbk:Obs TIME_PERIOD="2006-08-16" OBS_VALUE="-1.76903" BBK_DIFF_A="-0.06429"/>
      <bbk:Obs TIME_PERIOD="2006-08-15" OBS_VALUE="-1.70474" BBK_DIFF_A="0.06599"/>
      <bbk:Obs TIME_PERIOD="2006-08-14" OBS_VALUE="-1.77073" BBK_DIFF_A="0.11233"/>
      <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="-1.88306" BBK_DIFF_A="0.08772"/>
      <bbk:Obs TIME_PERIOD="2006-08-10" OBS_VALUE="-1.97078" BBK_DIFF_A="-0.03268"/>
      <bbk:Obs TIME_PERIOD="2006-08-09" OBS_VALUE="-1.9381" BBK_DIFF_A="-7.4E-4"/>
      <bbk:Obs TIME_PERIOD="2006-08-08" OBS_VALUE="-1.93736" BBK_DIFF_A="-0.02176"/>
      <bbk:Obs TIME_PERIOD="2006-08-07" OBS_VALUE="-1.9156" BBK_DIFF_A="-0.04382"/>
      <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="-1.87178" BBK_DIFF_A="0.16903"/>
      <bbk:Obs TIME_PERIOD="2006-08-03" OBS_VALUE="-2.04081" BBK_DIFF_A="0.11227"/>
      <bbk:Obs TIME_PERIOD="2006-08-02" OBS_VALUE="-2.15308" BBK_DIFF_A="-0.07657"/>
      <bbk:Obs TIME_PERIOD="2006-08-01" OBS_VALUE="-2.07651" BBK_DIFF_A="-0.02463"/>
      <bbk:Obs TIME_PERIOD="2006-07-31" OBS_VALUE="-2.05188" BBK_DIFF_A="-0.0836"/>
      <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="-1.96828" BBK_DIFF_A="0.05575"/>
      <bbk:Obs TIME_PERIOD="2006-07-27" OBS_VALUE="-2.02403" BBK_DIFF_A="-0.00754"/>
      <bbk:Obs TIME_PERIOD="2006-07-26" OBS_VALUE="-2.01649" BBK_DIFF_A="-0.04737"/>
      <bbk:Obs TIME_PERIOD="2006-07-25" OBS_VALUE="-1.96912" BBK_DIFF_A="-0.02919"/>
      <bbk:Obs TIME_PERIOD="2006-07-24" OBS_VALUE="-1.93993" BBK_DIFF_A="-0.073"/>
      <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="-1.86693" BBK_DIFF_A="-0.08277"/>
      <bbk:Obs TIME_PERIOD="2006-07-20" OBS_VALUE="-1.78416" BBK_DIFF_A="0.02895"/>
      <bbk:Obs TIME_PERIOD="2006-07-19" OBS_VALUE="-1.81311" BBK_DIFF_A="0.12474"/>
      <bbk:Obs TIME_PERIOD="2006-07-18" OBS_VALUE="-1.93785" BBK_DIFF_A="0.05783"/>
      <bbk:Obs TIME_PERIOD="2006-07-17" OBS_VALUE="-1.99568" BBK_DIFF_A="-0.03788"/>
      <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="-1.9578" BBK_DIFF_A="-0.19914"/>
      <bbk:Obs TIME_PERIOD="2006-07-13" OBS_VALUE="-1.75866" BBK_DIFF_A="0.2174"/>
      <bbk:Obs TIME_PERIOD="2006-07-12" OBS_VALUE="-1.97606" BBK_DIFF_A="16.52433"/>
      <bbk:Obs TIME_PERIOD="2006-07-11" OBS_VALUE="-18.50039" BBK_DIFF_A="-7.67036"/>
      <bbk:Obs TIME_PERIOD="2006-07-10" OBS_VALUE="-10.83003" BBK_DIFF_A="9.16997"/>
      <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="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2006-07-06" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2006-07-05" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2006-07-04" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2006-07-03" OBS_VALUE="-20.0" BBK_DIFF_A="-17.89012"/>
      <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="-2.10988" BBK_DIFF_A="17.89012"/>
      <bbk:Obs TIME_PERIOD="2006-06-29" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2006-06-28" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2006-06-27" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2006-06-26" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <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="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2006-06-22" OBS_VALUE="-20.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2006-06-21" OBS_VALUE="-20.0" BBK_DIFF_A="-17.90429"/>
      <bbk:Obs TIME_PERIOD="2006-06-20" OBS_VALUE="-2.09571" BBK_DIFF_A="17.90429"/>
      <bbk:Obs TIME_PERIOD="2006-06-19" OBS_VALUE="-20.0" BBK_DIFF_A="-17.56742"/>
      <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="-2.43258" BBK_DIFF_A="-0.15538"/>
      <bbk:Obs TIME_PERIOD="2006-06-15" OBS_VALUE="-2.2772" BBK_DIFF_A="0.04325"/>
      <bbk:Obs TIME_PERIOD="2006-06-14" OBS_VALUE="-2.32045" BBK_DIFF_A="0.02049"/>
      <bbk:Obs TIME_PERIOD="2006-06-13" OBS_VALUE="-2.34094" BBK_DIFF_A="-0.09941"/>
      <bbk:Obs TIME_PERIOD="2006-06-12" OBS_VALUE="-2.24153" BBK_DIFF_A="-0.1452"/>
      <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="-2.09633" BBK_DIFF_A="-0.02783"/>
      <bbk:Obs TIME_PERIOD="2006-06-08" OBS_VALUE="-2.0685" BBK_DIFF_A="-0.02521"/>
      <bbk:Obs TIME_PERIOD="2006-06-07" OBS_VALUE="-2.04329" BBK_DIFF_A="0.01957"/>
      <bbk:Obs TIME_PERIOD="2006-06-06" OBS_VALUE="-2.06286" BBK_DIFF_A="0.11758"/>
      <bbk:Obs TIME_PERIOD="2006-06-05" OBS_VALUE="-2.18044" BBK_DIFF_A="-0.01261"/>
      <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="-2.16783" BBK_DIFF_A="-0.03858"/>
      <bbk:Obs TIME_PERIOD="2006-06-01" OBS_VALUE="-2.12925" BBK_DIFF_A="0.26698"/>
      <bbk:Obs TIME_PERIOD="2006-05-31" OBS_VALUE="-2.39623" BBK_DIFF_A="0.05643"/>
      <bbk:Obs TIME_PERIOD="2006-05-30" OBS_VALUE="-2.45266" BBK_DIFF_A="-0.0331"/>
      <bbk:Obs TIME_PERIOD="2006-05-29" OBS_VALUE="-2.41956" BBK_DIFF_A="0.12627"/>
      <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="-2.54583" BBK_DIFF_A="0.00307"/>
      <bbk:Obs TIME_PERIOD="2006-05-25" OBS_VALUE="-2.5489" BBK_DIFF_A="0.04549"/>
      <bbk:Obs TIME_PERIOD="2006-05-24" OBS_VALUE="-2.59439" BBK_DIFF_A="-0.02194"/>
      <bbk:Obs TIME_PERIOD="2006-05-23" OBS_VALUE="-2.57245" BBK_DIFF_A="-0.0527"/>
      <bbk:Obs TIME_PERIOD="2006-05-22" OBS_VALUE="-2.51975" BBK_DIFF_A="-0.03353"/>
      <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="-2.48622" BBK_DIFF_A="0.00722"/>
      <bbk:Obs TIME_PERIOD="2006-05-18" OBS_VALUE="-2.49344" BBK_DIFF_A="-0.10421"/>
      <bbk:Obs TIME_PERIOD="2006-05-17" OBS_VALUE="-2.38923" BBK_DIFF_A="-0.07518"/>
      <bbk:Obs TIME_PERIOD="2006-05-16" OBS_VALUE="-2.31405" BBK_DIFF_A="-0.14779"/>
      <bbk:Obs TIME_PERIOD="2006-05-15" OBS_VALUE="-2.16626" BBK_DIFF_A="-0.2143"/>
      <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="-1.95196" BBK_DIFF_A="-0.07853"/>
      <bbk:Obs TIME_PERIOD="2006-05-11" OBS_VALUE="-1.87343" BBK_DIFF_A="-0.04775"/>
      <bbk:Obs TIME_PERIOD="2006-05-10" OBS_VALUE="-1.82568" BBK_DIFF_A="-0.04391"/>
      <bbk:Obs TIME_PERIOD="2006-05-09" OBS_VALUE="-1.78177" BBK_DIFF_A="0.06205"/>
      <bbk:Obs TIME_PERIOD="2006-05-08" OBS_VALUE="-1.84382" BBK_DIFF_A="0.02512"/>
      <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="-1.86894" BBK_DIFF_A="0.03132"/>
      <bbk:Obs TIME_PERIOD="2006-05-04" OBS_VALUE="-1.90026" BBK_DIFF_A="-0.0172"/>
      <bbk:Obs TIME_PERIOD="2006-05-03" OBS_VALUE="-1.88306" BBK_DIFF_A="-0.01725"/>
      <bbk:Obs TIME_PERIOD="2006-05-02" OBS_VALUE="-1.86581" BBK_DIFF_A="-0.04003"/>
      <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="-1.82578" BBK_DIFF_A="0.02008"/>
      <bbk:Obs TIME_PERIOD="2006-04-27" OBS_VALUE="-1.84586" BBK_DIFF_A="0.15438"/>
      <bbk:Obs TIME_PERIOD="2006-04-26" OBS_VALUE="-2.00024" BBK_DIFF_A="0.06994"/>
      <bbk:Obs TIME_PERIOD="2006-04-25" OBS_VALUE="-2.07018" BBK_DIFF_A="0.09348"/>
      <bbk:Obs TIME_PERIOD="2006-04-24" OBS_VALUE="-2.16366" BBK_DIFF_A="-0.00829"/>
      <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="-2.15537" BBK_DIFF_A="0.00144"/>
      <bbk:Obs TIME_PERIOD="2006-04-20" OBS_VALUE="-2.15681" BBK_DIFF_A="0.03331"/>
      <bbk:Obs TIME_PERIOD="2006-04-19" OBS_VALUE="-2.19012" BBK_DIFF_A="-0.14007"/>
      <bbk:Obs TIME_PERIOD="2006-04-18" OBS_VALUE="-2.05005" BBK_DIFF_A="-0.03746"/>
      <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="-2.01259" BBK_DIFF_A="0.12971"/>
      <bbk:Obs TIME_PERIOD="2006-04-12" OBS_VALUE="-2.1423" BBK_DIFF_A="-0.05425"/>
      <bbk:Obs TIME_PERIOD="2006-04-11" OBS_VALUE="-2.08805" BBK_DIFF_A="0.03103"/>
      <bbk:Obs TIME_PERIOD="2006-04-10" OBS_VALUE="-2.11908" BBK_DIFF_A="-0.03765"/>
      <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="-2.08143" BBK_DIFF_A="-0.1462"/>
      <bbk:Obs TIME_PERIOD="2006-04-06" OBS_VALUE="-1.93523" BBK_DIFF_A="-0.11873"/>
      <bbk:Obs TIME_PERIOD="2006-04-05" OBS_VALUE="-1.8165" BBK_DIFF_A="0.22324"/>
      <bbk:Obs TIME_PERIOD="2006-04-04" OBS_VALUE="-2.03974" BBK_DIFF_A="0.09869"/>
      <bbk:Obs TIME_PERIOD="2006-04-03" OBS_VALUE="-2.13843" BBK_DIFF_A="-0.2031"/>
      <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="-1.93533" BBK_DIFF_A="0.08893"/>
      <bbk:Obs TIME_PERIOD="2006-03-30" OBS_VALUE="-2.02426" BBK_DIFF_A="0.05609"/>
      <bbk:Obs TIME_PERIOD="2006-03-29" OBS_VALUE="-2.08035" BBK_DIFF_A="0.47064"/>
      <bbk:Obs TIME_PERIOD="2006-03-28" OBS_VALUE="-2.55099" BBK_DIFF_A="0.15807"/>
      <bbk:Obs TIME_PERIOD="2006-03-27" OBS_VALUE="-2.70906" BBK_DIFF_A="-0.19341"/>
      <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="-2.51565" BBK_DIFF_A="0.10941"/>
      <bbk:Obs TIME_PERIOD="2006-03-23" OBS_VALUE="-2.62506" BBK_DIFF_A="0.00408"/>
      <bbk:Obs TIME_PERIOD="2006-03-22" OBS_VALUE="-2.62914" BBK_DIFF_A="-0.23225"/>
      <bbk:Obs TIME_PERIOD="2006-03-21" OBS_VALUE="-2.39689" BBK_DIFF_A="0.01724"/>
      <bbk:Obs TIME_PERIOD="2006-03-20" OBS_VALUE="-2.41413" BBK_DIFF_A="-0.13494"/>
      <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="-2.27919" BBK_DIFF_A="-0.06656"/>
      <bbk:Obs TIME_PERIOD="2006-03-16" OBS_VALUE="-2.21263" BBK_DIFF_A="0.14401"/>
      <bbk:Obs TIME_PERIOD="2006-03-15" OBS_VALUE="-2.35664" BBK_DIFF_A="-0.15032"/>
      <bbk:Obs TIME_PERIOD="2006-03-14" OBS_VALUE="-2.20632" BBK_DIFF_A="0.26015"/>
      <bbk:Obs TIME_PERIOD="2006-03-13" OBS_VALUE="-2.46647" BBK_DIFF_A="0.02641"/>
      <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="-2.49288" BBK_DIFF_A="-0.0562"/>
      <bbk:Obs TIME_PERIOD="2006-03-09" OBS_VALUE="-2.43668" BBK_DIFF_A="0.50872"/>
      <bbk:Obs TIME_PERIOD="2006-03-08" OBS_VALUE="-2.9454" BBK_DIFF_A="0.22582"/>
      <bbk:Obs TIME_PERIOD="2006-03-07" OBS_VALUE="-3.17122" BBK_DIFF_A="-0.14142"/>
      <bbk:Obs TIME_PERIOD="2006-03-06" OBS_VALUE="-3.0298" BBK_DIFF_A="1.14875"/>
      <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="-4.17855" BBK_DIFF_A="-0.39589"/>
      <bbk:Obs TIME_PERIOD="2006-03-02" OBS_VALUE="-3.78266" BBK_DIFF_A="0.40549"/>
      <bbk:Obs TIME_PERIOD="2006-03-01" OBS_VALUE="-4.18815" BBK_DIFF_A="0.05428"/>
      <bbk:Obs TIME_PERIOD="2006-02-28" OBS_VALUE="-4.24243" BBK_DIFF_A="-0.26295"/>
      <bbk:Obs TIME_PERIOD="2006-02-27" OBS_VALUE="-3.97948" BBK_DIFF_A="0.62385"/>
      <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="-4.60333" BBK_DIFF_A="0.07764"/>
      <bbk:Obs TIME_PERIOD="2006-02-23" OBS_VALUE="-4.68097" BBK_DIFF_A="-0.11047"/>
      <bbk:Obs TIME_PERIOD="2006-02-22" OBS_VALUE="-4.5705" BBK_DIFF_A="1.3277"/>
      <bbk:Obs TIME_PERIOD="2006-02-21" OBS_VALUE="-5.8982" BBK_DIFF_A="-1.68046"/>
      <bbk:Obs TIME_PERIOD="2006-02-20" OBS_VALUE="-4.21774" BBK_DIFF_A="-0.11543"/>
      <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="-4.10231" BBK_DIFF_A="-0.48215"/>
      <bbk:Obs TIME_PERIOD="2006-02-16" OBS_VALUE="-3.62016" BBK_DIFF_A="1.25195"/>
      <bbk:Obs TIME_PERIOD="2006-02-15" OBS_VALUE="-4.87211" BBK_DIFF_A="-1.34874"/>
      <bbk:Obs TIME_PERIOD="2006-02-14" OBS_VALUE="-3.52337" BBK_DIFF_A="-0.09493"/>
      <bbk:Obs TIME_PERIOD="2006-02-13" OBS_VALUE="-3.42844" BBK_DIFF_A="0.06781"/>
      <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="-3.49625" BBK_DIFF_A="-0.28524"/>
      <bbk:Obs TIME_PERIOD="2006-02-09" OBS_VALUE="-3.21101" BBK_DIFF_A="-0.07447"/>
      <bbk:Obs TIME_PERIOD="2006-02-08" OBS_VALUE="-3.13654" BBK_DIFF_A="0.11354"/>
      <bbk:Obs TIME_PERIOD="2006-02-07" OBS_VALUE="-3.25008" BBK_DIFF_A="0.00656"/>
      <bbk:Obs TIME_PERIOD="2006-02-06" OBS_VALUE="-3.25664" BBK_DIFF_A="-0.21429"/>
      <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="-3.04235" BBK_DIFF_A="0.03576"/>
      <bbk:Obs TIME_PERIOD="2006-02-02" OBS_VALUE="-3.07811" BBK_DIFF_A="0.58945"/>
      <bbk:Obs TIME_PERIOD="2006-02-01" OBS_VALUE="-3.66756" BBK_DIFF_A="0.07977"/>
      <bbk:Obs TIME_PERIOD="2006-01-31" OBS_VALUE="-3.74733" BBK_DIFF_A="1.14738"/>
      <bbk:Obs TIME_PERIOD="2006-01-30" OBS_VALUE="-4.89471" BBK_DIFF_A="0.12422"/>
      <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="-5.01893" BBK_DIFF_A="-0.12103"/>
      <bbk:Obs TIME_PERIOD="2006-01-26" OBS_VALUE="-4.8979" BBK_DIFF_A="0.77947"/>
      <bbk:Obs TIME_PERIOD="2006-01-25" OBS_VALUE="-5.67737" BBK_DIFF_A="-0.05317"/>
      <bbk:Obs TIME_PERIOD="2006-01-24" OBS_VALUE="-5.6242" BBK_DIFF_A="-0.07571"/>
      <bbk:Obs TIME_PERIOD="2006-01-23" OBS_VALUE="-5.54849" BBK_DIFF_A="-0.04982"/>
      <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="-5.49867" BBK_DIFF_A="0.20013"/>
      <bbk:Obs TIME_PERIOD="2006-01-19" OBS_VALUE="-5.6988" BBK_DIFF_A="0.59683"/>
      <bbk:Obs TIME_PERIOD="2006-01-18" OBS_VALUE="-6.29563" BBK_DIFF_A="-0.04388"/>
      <bbk:Obs TIME_PERIOD="2006-01-17" OBS_VALUE="-6.25175" BBK_DIFF_A="0.23382"/>
      <bbk:Obs TIME_PERIOD="2006-01-16" OBS_VALUE="-6.48557" BBK_DIFF_A="-0.54599"/>
      <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="-5.93958" BBK_DIFF_A="-0.15906"/>
      <bbk:Obs TIME_PERIOD="2006-01-12" OBS_VALUE="-5.78052" BBK_DIFF_A="0.08223"/>
      <bbk:Obs TIME_PERIOD="2006-01-11" OBS_VALUE="-5.86275" BBK_DIFF_A="0.91959"/>
      <bbk:Obs TIME_PERIOD="2006-01-10" OBS_VALUE="-6.78234" BBK_DIFF_A="-0.50689"/>
      <bbk:Obs TIME_PERIOD="2006-01-09" OBS_VALUE="-6.27545" BBK_DIFF_A="-0.23678"/>
      <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="-6.03867" BBK_DIFF_A="-0.13218"/>
      <bbk:Obs TIME_PERIOD="2006-01-05" OBS_VALUE="-5.90649" BBK_DIFF_A="-0.70495"/>
      <bbk:Obs TIME_PERIOD="2006-01-04" OBS_VALUE="-5.20154" BBK_DIFF_A="-0.16053"/>
      <bbk:Obs TIME_PERIOD="2006-01-03" OBS_VALUE="-5.04101" BBK_DIFF_A="1.01484"/>
      <bbk:Obs TIME_PERIOD="2006-01-02" OBS_VALUE="-6.05585" BBK_DIFF_A="-1.52787"/>
      <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="-4.52798" BBK_DIFF_A="1.94462"/>
      <bbk:Obs TIME_PERIOD="2005-12-29" OBS_VALUE="-6.4726" BBK_DIFF_A="0.03357"/>
      <bbk:Obs TIME_PERIOD="2005-12-28" OBS_VALUE="-6.50617" BBK_DIFF_A="-0.20072"/>
      <bbk:Obs TIME_PERIOD="2005-12-27" OBS_VALUE="-6.30545" BBK_DIFF_A="0.01538"/>
      <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="-6.32083" BBK_DIFF_A="-0.09562"/>
      <bbk:Obs TIME_PERIOD="2005-12-22" OBS_VALUE="-6.22521" BBK_DIFF_A="0.47842"/>
      <bbk:Obs TIME_PERIOD="2005-12-21" OBS_VALUE="-6.70363" BBK_DIFF_A="-0.28877"/>
      <bbk:Obs TIME_PERIOD="2005-12-20" OBS_VALUE="-6.41486" BBK_DIFF_A="0.40407"/>
      <bbk:Obs TIME_PERIOD="2005-12-19" OBS_VALUE="-6.81893" BBK_DIFF_A="-0.11036"/>
      <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="-6.70857" BBK_DIFF_A="-0.45821"/>
      <bbk:Obs TIME_PERIOD="2005-12-15" OBS_VALUE="-6.25036" BBK_DIFF_A="0.5429"/>
      <bbk:Obs TIME_PERIOD="2005-12-14" OBS_VALUE="-6.79326" BBK_DIFF_A="-0.02473"/>
      <bbk:Obs TIME_PERIOD="2005-12-13" OBS_VALUE="-6.76853" BBK_DIFF_A="-0.07076"/>
      <bbk:Obs TIME_PERIOD="2005-12-12" OBS_VALUE="-6.69777" BBK_DIFF_A="-0.13409"/>
      <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="-6.56368" BBK_DIFF_A="-0.30606"/>
      <bbk:Obs TIME_PERIOD="2005-12-08" OBS_VALUE="-6.25762" BBK_DIFF_A="0.07963"/>
      <bbk:Obs TIME_PERIOD="2005-12-07" OBS_VALUE="-6.33725" BBK_DIFF_A="0.10695"/>
      <bbk:Obs TIME_PERIOD="2005-12-06" OBS_VALUE="-6.4442" BBK_DIFF_A="-0.31889"/>
      <bbk:Obs TIME_PERIOD="2005-12-05" OBS_VALUE="-6.12531" BBK_DIFF_A="-0.0714"/>
      <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="-6.05391" BBK_DIFF_A="-0.11764"/>
      <bbk:Obs TIME_PERIOD="2005-12-01" OBS_VALUE="-5.93627" BBK_DIFF_A="-0.01801"/>
      <bbk:Obs TIME_PERIOD="2005-11-30" OBS_VALUE="-5.91826" BBK_DIFF_A="0.31132"/>
      <bbk:Obs TIME_PERIOD="2005-11-29" OBS_VALUE="-6.22958" BBK_DIFF_A="-0.28333"/>
      <bbk:Obs TIME_PERIOD="2005-11-28" OBS_VALUE="-5.94625" BBK_DIFF_A="-0.90242"/>
      <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="-5.04383" BBK_DIFF_A="0.14705"/>
      <bbk:Obs TIME_PERIOD="2005-11-24" OBS_VALUE="-5.19088" BBK_DIFF_A="-0.29056"/>
      <bbk:Obs TIME_PERIOD="2005-11-23" OBS_VALUE="-4.90032" BBK_DIFF_A="-0.45226"/>
      <bbk:Obs TIME_PERIOD="2005-11-22" OBS_VALUE="-4.44806" BBK_DIFF_A="-0.53087"/>
      <bbk:Obs TIME_PERIOD="2005-11-21" OBS_VALUE="-3.91719" BBK_DIFF_A="0.55637"/>
      <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="-4.47356" BBK_DIFF_A="0.01942"/>
      <bbk:Obs TIME_PERIOD="2005-11-17" OBS_VALUE="-4.49298" BBK_DIFF_A="-0.33994"/>
      <bbk:Obs TIME_PERIOD="2005-11-16" OBS_VALUE="-4.15304" BBK_DIFF_A="-0.12938"/>
      <bbk:Obs TIME_PERIOD="2005-11-15" OBS_VALUE="-4.02366" BBK_DIFF_A="0.21892"/>
      <bbk:Obs TIME_PERIOD="2005-11-14" OBS_VALUE="-4.24258" BBK_DIFF_A="-0.15042"/>
      <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="-4.09216" BBK_DIFF_A="0.07528"/>
      <bbk:Obs TIME_PERIOD="2005-11-10" OBS_VALUE="-4.16744" BBK_DIFF_A="0.0388"/>
      <bbk:Obs TIME_PERIOD="2005-11-09" OBS_VALUE="-4.20624" BBK_DIFF_A="0.33363"/>
      <bbk:Obs TIME_PERIOD="2005-11-08" OBS_VALUE="-4.53987" BBK_DIFF_A="0.02172"/>
      <bbk:Obs TIME_PERIOD="2005-11-07" OBS_VALUE="-4.56159" BBK_DIFF_A="0.01438"/>
      <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="-4.57597" BBK_DIFF_A="0.01827"/>
      <bbk:Obs TIME_PERIOD="2005-11-03" OBS_VALUE="-4.59424" BBK_DIFF_A="0.5603"/>
      <bbk:Obs TIME_PERIOD="2005-11-02" OBS_VALUE="-5.15454" BBK_DIFF_A="0.12631"/>
      <bbk:Obs TIME_PERIOD="2005-11-01" OBS_VALUE="-5.28085" BBK_DIFF_A="0.1813"/>
      <bbk:Obs TIME_PERIOD="2005-10-31" OBS_VALUE="-5.46215" BBK_DIFF_A="-4.26435"/>
      <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="-1.1978" BBK_DIFF_A="3.8E-4"/>
      <bbk:Obs TIME_PERIOD="2005-10-27" OBS_VALUE="-1.19818" BBK_DIFF_A="-0.02045"/>
      <bbk:Obs TIME_PERIOD="2005-10-26" OBS_VALUE="-1.17773" BBK_DIFF_A="-0.15444"/>
      <bbk:Obs TIME_PERIOD="2005-10-25" OBS_VALUE="-1.02329" BBK_DIFF_A="0.00498"/>
      <bbk:Obs TIME_PERIOD="2005-10-24" OBS_VALUE="-1.02827" BBK_DIFF_A="-0.02911"/>
      <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="-0.99916" BBK_DIFF_A="-0.08447"/>
      <bbk:Obs TIME_PERIOD="2005-10-20" OBS_VALUE="-0.91469" BBK_DIFF_A="-0.11553"/>
      <bbk:Obs TIME_PERIOD="2005-10-19" OBS_VALUE="-0.79916" BBK_DIFF_A="0.12128"/>
      <bbk:Obs TIME_PERIOD="2005-10-18" OBS_VALUE="-0.92044" BBK_DIFF_A="0.07836"/>
      <bbk:Obs TIME_PERIOD="2005-10-17" OBS_VALUE="-0.9988" BBK_DIFF_A="6.13475"/>
      <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="-7.13355" BBK_DIFF_A="0.51091"/>
      <bbk:Obs TIME_PERIOD="2005-10-13" OBS_VALUE="-7.64446" BBK_DIFF_A="0.32453"/>
      <bbk:Obs TIME_PERIOD="2005-10-12" OBS_VALUE="-7.96899" BBK_DIFF_A="0.07933"/>
      <bbk:Obs TIME_PERIOD="2005-10-11" OBS_VALUE="-8.04832" BBK_DIFF_A="-0.31748"/>
      <bbk:Obs TIME_PERIOD="2005-10-10" OBS_VALUE="-7.73084" BBK_DIFF_A="-6.65235"/>
      <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="-1.07849" BBK_DIFF_A="-0.34385"/>
      <bbk:Obs TIME_PERIOD="2005-10-06" OBS_VALUE="-0.73464" BBK_DIFF_A="-0.03901"/>
      <bbk:Obs TIME_PERIOD="2005-10-05" OBS_VALUE="-0.69563" BBK_DIFF_A="0.0693"/>
      <bbk:Obs TIME_PERIOD="2005-10-04" OBS_VALUE="-0.76493" BBK_DIFF_A="0.08728"/>
      <bbk:Obs TIME_PERIOD="2005-10-03" OBS_VALUE="-0.85221" BBK_DIFF_A="-0.04821"/>
      <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="-0.804" BBK_DIFF_A="-0.23312"/>
      <bbk:Obs TIME_PERIOD="2005-09-29" OBS_VALUE="-0.57088" BBK_DIFF_A="-0.16312"/>
      <bbk:Obs TIME_PERIOD="2005-09-28" OBS_VALUE="-0.40776" BBK_DIFF_A="0.01464"/>
      <bbk:Obs TIME_PERIOD="2005-09-27" OBS_VALUE="-0.4224" BBK_DIFF_A="0.05492"/>
      <bbk:Obs TIME_PERIOD="2005-09-26" OBS_VALUE="-0.47732" BBK_DIFF_A="-0.146"/>
      <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="-0.33132" BBK_DIFF_A="0.07046"/>
      <bbk:Obs TIME_PERIOD="2005-09-22" OBS_VALUE="-0.40178" BBK_DIFF_A="-0.08762"/>
      <bbk:Obs TIME_PERIOD="2005-09-21" OBS_VALUE="-0.31416" BBK_DIFF_A="0.00918"/>
      <bbk:Obs TIME_PERIOD="2005-09-20" OBS_VALUE="-0.32334" BBK_DIFF_A="-0.01032"/>
      <bbk:Obs TIME_PERIOD="2005-09-19" OBS_VALUE="-0.31302" BBK_DIFF_A="0.04855"/>
      <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="-0.36157" BBK_DIFF_A="-0.07638"/>
      <bbk:Obs TIME_PERIOD="2005-09-15" OBS_VALUE="-0.28519" BBK_DIFF_A="0.07267"/>
      <bbk:Obs TIME_PERIOD="2005-09-14" OBS_VALUE="-0.35786" BBK_DIFF_A="0.05346"/>
      <bbk:Obs TIME_PERIOD="2005-09-13" OBS_VALUE="-0.41132" BBK_DIFF_A="-0.0012"/>
      <bbk:Obs TIME_PERIOD="2005-09-12" OBS_VALUE="-0.41012" BBK_DIFF_A="9.15896"/>
      <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="-9.56908" BBK_DIFF_A="-0.05011"/>
      <bbk:Obs TIME_PERIOD="2005-09-08" OBS_VALUE="-9.51897" BBK_DIFF_A="0.40461"/>
      <bbk:Obs TIME_PERIOD="2005-09-07" OBS_VALUE="-9.92358" BBK_DIFF_A="-0.22364"/>
      <bbk:Obs TIME_PERIOD="2005-09-06" OBS_VALUE="-9.69994" BBK_DIFF_A="0.53278"/>
      <bbk:Obs TIME_PERIOD="2005-09-05" OBS_VALUE="-10.23272" BBK_DIFF_A="-0.09651"/>
      <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="-10.13621" BBK_DIFF_A="-0.2347"/>
      <bbk:Obs TIME_PERIOD="2005-09-01" OBS_VALUE="-9.90151" BBK_DIFF_A="-0.93578"/>
      <bbk:Obs TIME_PERIOD="2005-08-31" OBS_VALUE="-8.96573" BBK_DIFF_A="0.87176"/>
      <bbk:Obs TIME_PERIOD="2005-08-30" OBS_VALUE="-9.83749" BBK_DIFF_A="-0.17687"/>
      <bbk:Obs TIME_PERIOD="2005-08-29" OBS_VALUE="-9.66062" BBK_DIFF_A="0.09953"/>
      <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="-9.76015" BBK_DIFF_A="-9.15293"/>
      <bbk:Obs TIME_PERIOD="2005-08-25" OBS_VALUE="-0.60722" BBK_DIFF_A="1.0E-5"/>
      <bbk:Obs TIME_PERIOD="2005-08-24" OBS_VALUE="-0.60723" BBK_DIFF_A="-0.0048"/>
      <bbk:Obs TIME_PERIOD="2005-08-23" OBS_VALUE="-0.60243" BBK_DIFF_A="-0.0337"/>
      <bbk:Obs TIME_PERIOD="2005-08-22" OBS_VALUE="-0.56873" BBK_DIFF_A="0.01955"/>
      <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="-0.58828" BBK_DIFF_A="0.00705"/>
      <bbk:Obs TIME_PERIOD="2005-08-18" OBS_VALUE="-0.59533" BBK_DIFF_A="0.01514"/>
      <bbk:Obs TIME_PERIOD="2005-08-17" OBS_VALUE="-0.61047" BBK_DIFF_A="-0.12917"/>
      <bbk:Obs TIME_PERIOD="2005-08-16" OBS_VALUE="-0.4813" BBK_DIFF_A="0.0273"/>
      <bbk:Obs TIME_PERIOD="2005-08-15" OBS_VALUE="-0.5086" BBK_DIFF_A="-0.0299"/>
      <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="-0.4787" BBK_DIFF_A="-0.01798"/>
      <bbk:Obs TIME_PERIOD="2005-08-11" OBS_VALUE="-0.46072" BBK_DIFF_A="0.00411"/>
      <bbk:Obs TIME_PERIOD="2005-08-10" OBS_VALUE="-0.46483" BBK_DIFF_A="0.08022"/>
      <bbk:Obs TIME_PERIOD="2005-08-09" OBS_VALUE="-0.54505" BBK_DIFF_A="-0.00608"/>
      <bbk:Obs TIME_PERIOD="2005-08-08" OBS_VALUE="-0.53897" BBK_DIFF_A="-0.11817"/>
      <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="-0.4208" BBK_DIFF_A="6.57296"/>
      <bbk:Obs TIME_PERIOD="2005-08-04" OBS_VALUE="-6.99376" BBK_DIFF_A="-0.04727"/>
      <bbk:Obs TIME_PERIOD="2005-08-03" OBS_VALUE="-6.94649" BBK_DIFF_A="0.36847"/>
      <bbk:Obs TIME_PERIOD="2005-08-02" OBS_VALUE="-7.31496" BBK_DIFF_A="0.33187"/>
      <bbk:Obs TIME_PERIOD="2005-08-01" OBS_VALUE="-7.64683" BBK_DIFF_A="-7.0519"/>
      <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="-0.59493" BBK_DIFF_A="-0.05665"/>
      <bbk:Obs TIME_PERIOD="2005-07-28" OBS_VALUE="-0.53828" BBK_DIFF_A="0.19848"/>
      <bbk:Obs TIME_PERIOD="2005-07-27" OBS_VALUE="-0.73676" BBK_DIFF_A="0.0645"/>
      <bbk:Obs TIME_PERIOD="2005-07-26" OBS_VALUE="-0.80126" BBK_DIFF_A="-0.00199"/>
      <bbk:Obs TIME_PERIOD="2005-07-25" OBS_VALUE="-0.79927" BBK_DIFF_A="-0.06194"/>
      <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="-0.73733" BBK_DIFF_A="-0.00117"/>
      <bbk:Obs TIME_PERIOD="2005-07-21" OBS_VALUE="-0.73616" BBK_DIFF_A="0.0122"/>
      <bbk:Obs TIME_PERIOD="2005-07-20" OBS_VALUE="-0.74836" BBK_DIFF_A="-0.01702"/>
      <bbk:Obs TIME_PERIOD="2005-07-19" OBS_VALUE="-0.73134" BBK_DIFF_A="-0.02928"/>
      <bbk:Obs TIME_PERIOD="2005-07-18" OBS_VALUE="-0.70206" BBK_DIFF_A="0.03758"/>
      <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="-0.73964" BBK_DIFF_A="-0.02424"/>
      <bbk:Obs TIME_PERIOD="2005-07-14" OBS_VALUE="-0.7154" BBK_DIFF_A="0.11677"/>
      <bbk:Obs TIME_PERIOD="2005-07-13" OBS_VALUE="-0.83217" BBK_DIFF_A="-0.12031"/>
      <bbk:Obs TIME_PERIOD="2005-07-12" OBS_VALUE="-0.71186" BBK_DIFF_A="0.07213"/>
      <bbk:Obs TIME_PERIOD="2005-07-11" OBS_VALUE="-0.78399" BBK_DIFF_A="0.10352"/>
      <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="-0.88751" BBK_DIFF_A="7.26778"/>
      <bbk:Obs TIME_PERIOD="2005-07-07" OBS_VALUE="-8.15529" BBK_DIFF_A="-0.02263"/>
      <bbk:Obs TIME_PERIOD="2005-07-06" OBS_VALUE="-8.13266" BBK_DIFF_A="0.06838"/>
      <bbk:Obs TIME_PERIOD="2005-07-05" OBS_VALUE="-8.20104" BBK_DIFF_A="0.52058"/>
      <bbk:Obs TIME_PERIOD="2005-07-04" OBS_VALUE="-8.72162" BBK_DIFF_A="0.43759"/>
      <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="-9.15921" BBK_DIFF_A="-0.32216"/>
      <bbk:Obs TIME_PERIOD="2005-06-30" OBS_VALUE="-8.83705" BBK_DIFF_A="-0.22372"/>
      <bbk:Obs TIME_PERIOD="2005-06-29" OBS_VALUE="-8.61333" BBK_DIFF_A="0.10083"/>
      <bbk:Obs TIME_PERIOD="2005-06-28" OBS_VALUE="-8.71416" BBK_DIFF_A="0.17079"/>
      <bbk:Obs TIME_PERIOD="2005-06-27" OBS_VALUE="-8.88495" BBK_DIFF_A="0.04447"/>
      <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="-8.92942" BBK_DIFF_A="-0.40154"/>
      <bbk:Obs TIME_PERIOD="2005-06-23" OBS_VALUE="-8.52788" BBK_DIFF_A="-0.05736"/>
      <bbk:Obs TIME_PERIOD="2005-06-22" OBS_VALUE="-8.47052" BBK_DIFF_A="-0.79026"/>
      <bbk:Obs TIME_PERIOD="2005-06-21" OBS_VALUE="-7.68026" BBK_DIFF_A="-0.10364"/>
      <bbk:Obs TIME_PERIOD="2005-06-20" OBS_VALUE="-7.57662" BBK_DIFF_A="0.05714"/>
      <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="-7.63376" BBK_DIFF_A="-6.60928"/>
      <bbk:Obs TIME_PERIOD="2005-06-16" OBS_VALUE="-1.02448" BBK_DIFF_A="0.08389"/>
      <bbk:Obs TIME_PERIOD="2005-06-15" OBS_VALUE="-1.10837" BBK_DIFF_A="0.0684"/>
      <bbk:Obs TIME_PERIOD="2005-06-14" OBS_VALUE="-1.17677" BBK_DIFF_A="0.00892"/>
      <bbk:Obs TIME_PERIOD="2005-06-13" OBS_VALUE="-1.18569" BBK_DIFF_A="-0.03347"/>
      <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="-1.15222" BBK_DIFF_A="0.06628"/>
      <bbk:Obs TIME_PERIOD="2005-06-09" OBS_VALUE="-1.2185" BBK_DIFF_A="0.12051"/>
      <bbk:Obs TIME_PERIOD="2005-06-08" OBS_VALUE="-1.33901" BBK_DIFF_A="-0.14819"/>
      <bbk:Obs TIME_PERIOD="2005-06-07" OBS_VALUE="-1.19082" BBK_DIFF_A="-0.04648"/>
      <bbk:Obs TIME_PERIOD="2005-06-06" OBS_VALUE="-1.14434" BBK_DIFF_A="-0.04076"/>
      <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="-1.10358" BBK_DIFF_A="-0.00526"/>
      <bbk:Obs TIME_PERIOD="2005-06-02" OBS_VALUE="-1.09832" BBK_DIFF_A="-0.01151"/>
      <bbk:Obs TIME_PERIOD="2005-06-01" OBS_VALUE="-1.08681" BBK_DIFF_A="-0.13783"/>
      <bbk:Obs TIME_PERIOD="2005-05-31" OBS_VALUE="-0.94898" BBK_DIFF_A="-0.04064"/>
      <bbk:Obs TIME_PERIOD="2005-05-30" OBS_VALUE="-0.90834" BBK_DIFF_A="0.00699"/>
      <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="-0.91533" BBK_DIFF_A="-0.03483"/>
      <bbk:Obs TIME_PERIOD="2005-05-26" OBS_VALUE="-0.8805" BBK_DIFF_A="0.24362"/>
      <bbk:Obs TIME_PERIOD="2005-05-25" OBS_VALUE="-1.12412" BBK_DIFF_A="-0.15477"/>
      <bbk:Obs TIME_PERIOD="2005-05-24" OBS_VALUE="-0.96935" BBK_DIFF_A="-0.09528"/>
      <bbk:Obs TIME_PERIOD="2005-05-23" OBS_VALUE="-0.87407" BBK_DIFF_A="0.00111"/>
      <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="-0.87518" BBK_DIFF_A="0.07267"/>
      <bbk:Obs TIME_PERIOD="2005-05-19" OBS_VALUE="-0.94785" BBK_DIFF_A="-0.04073"/>
      <bbk:Obs TIME_PERIOD="2005-05-18" OBS_VALUE="-0.90712" BBK_DIFF_A="0.06809"/>
      <bbk:Obs TIME_PERIOD="2005-05-17" OBS_VALUE="-0.97521" BBK_DIFF_A="-0.05886"/>
      <bbk:Obs TIME_PERIOD="2005-05-16" OBS_VALUE="-0.91635" BBK_DIFF_A="0.09106"/>
      <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="-1.00741" BBK_DIFF_A="-0.05639"/>
      <bbk:Obs TIME_PERIOD="2005-05-12" OBS_VALUE="-0.95102" BBK_DIFF_A="0.06698"/>
      <bbk:Obs TIME_PERIOD="2005-05-11" OBS_VALUE="-1.018" BBK_DIFF_A="-0.05767"/>
      <bbk:Obs TIME_PERIOD="2005-05-10" OBS_VALUE="-0.96033" BBK_DIFF_A="0.08073"/>
      <bbk:Obs TIME_PERIOD="2005-05-09" OBS_VALUE="-1.04106" BBK_DIFF_A="-0.11481"/>
      <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="-0.92625" BBK_DIFF_A="-0.05532"/>
      <bbk:Obs TIME_PERIOD="2005-05-05" OBS_VALUE="-0.87093" BBK_DIFF_A="0.17649"/>
      <bbk:Obs TIME_PERIOD="2005-05-04" OBS_VALUE="-1.04742" BBK_DIFF_A="-0.08341"/>
      <bbk:Obs TIME_PERIOD="2005-05-03" OBS_VALUE="-0.96401" BBK_DIFF_A="-0.02078"/>
      <bbk:Obs TIME_PERIOD="2005-05-02" OBS_VALUE="-0.94323" BBK_DIFF_A="-0.05941"/>
      <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="-0.88382" BBK_DIFF_A="-0.13582"/>
      <bbk:Obs TIME_PERIOD="2005-04-28" OBS_VALUE="-0.748" BBK_DIFF_A="-0.00893"/>
      <bbk:Obs TIME_PERIOD="2005-04-27" OBS_VALUE="-0.73907" BBK_DIFF_A="0.02157"/>
      <bbk:Obs TIME_PERIOD="2005-04-26" OBS_VALUE="-0.76064" BBK_DIFF_A="-0.05447"/>
      <bbk:Obs TIME_PERIOD="2005-04-25" OBS_VALUE="-0.70617" BBK_DIFF_A="-0.01706"/>
      <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="-0.68911" BBK_DIFF_A="0.02567"/>
      <bbk:Obs TIME_PERIOD="2005-04-21" OBS_VALUE="-0.71478" BBK_DIFF_A="0.00484"/>
      <bbk:Obs TIME_PERIOD="2005-04-20" OBS_VALUE="-0.71962" BBK_DIFF_A="-0.0424"/>
      <bbk:Obs TIME_PERIOD="2005-04-19" OBS_VALUE="-0.67722" BBK_DIFF_A="0.03868"/>
      <bbk:Obs TIME_PERIOD="2005-04-18" OBS_VALUE="-0.7159" BBK_DIFF_A="-0.19086"/>
      <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="-0.52504" BBK_DIFF_A="0.00196"/>
      <bbk:Obs TIME_PERIOD="2005-04-14" OBS_VALUE="-0.527" BBK_DIFF_A="0.04351"/>
      <bbk:Obs TIME_PERIOD="2005-04-13" OBS_VALUE="-0.57051" BBK_DIFF_A="-0.10834"/>
      <bbk:Obs TIME_PERIOD="2005-04-12" OBS_VALUE="-0.46217" BBK_DIFF_A="-0.03379"/>
      <bbk:Obs TIME_PERIOD="2005-04-11" OBS_VALUE="-0.42838" BBK_DIFF_A="-0.01601"/>
      <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="-0.41237" BBK_DIFF_A="0.02137"/>
      <bbk:Obs TIME_PERIOD="2005-04-07" OBS_VALUE="-0.43374" BBK_DIFF_A="0.02339"/>
      <bbk:Obs TIME_PERIOD="2005-04-06" OBS_VALUE="-0.45713" BBK_DIFF_A="0.00307"/>
      <bbk:Obs TIME_PERIOD="2005-04-05" OBS_VALUE="-0.4602" BBK_DIFF_A="-0.00622"/>
      <bbk:Obs TIME_PERIOD="2005-04-04" OBS_VALUE="-0.45398" BBK_DIFF_A="0.02966"/>
      <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="-0.48364" BBK_DIFF_A="0.05058"/>
      <bbk:Obs TIME_PERIOD="2005-03-31" OBS_VALUE="-0.53422" BBK_DIFF_A="0.15503"/>
      <bbk:Obs TIME_PERIOD="2005-03-30" OBS_VALUE="-0.68925" BBK_DIFF_A="0.12426"/>
      <bbk:Obs TIME_PERIOD="2005-03-29" OBS_VALUE="-0.81351" BBK_DIFF_A="-0.12664"/>
      <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="-0.68687" BBK_DIFF_A="0.12359"/>
      <bbk:Obs TIME_PERIOD="2005-03-23" OBS_VALUE="-0.81046" BBK_DIFF_A="0.04505"/>
      <bbk:Obs TIME_PERIOD="2005-03-22" OBS_VALUE="-0.85551" BBK_DIFF_A="-0.04504"/>
      <bbk:Obs TIME_PERIOD="2005-03-21" OBS_VALUE="-0.81047" BBK_DIFF_A="-0.15692"/>
      <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="-0.65355" BBK_DIFF_A="0.03638"/>
      <bbk:Obs TIME_PERIOD="2005-03-17" OBS_VALUE="-0.68993" BBK_DIFF_A="0.01771"/>
      <bbk:Obs TIME_PERIOD="2005-03-16" OBS_VALUE="-0.70764" BBK_DIFF_A="-0.02252"/>
      <bbk:Obs TIME_PERIOD="2005-03-15" OBS_VALUE="-0.68512" BBK_DIFF_A="-0.01004"/>
      <bbk:Obs TIME_PERIOD="2005-03-14" OBS_VALUE="-0.67508" BBK_DIFF_A="-0.09566"/>
      <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="-0.57942" BBK_DIFF_A="0.03417"/>
      <bbk:Obs TIME_PERIOD="2005-03-10" OBS_VALUE="-0.61359" BBK_DIFF_A="0.08094"/>
      <bbk:Obs TIME_PERIOD="2005-03-09" OBS_VALUE="-0.69453" BBK_DIFF_A="1.29804"/>
      <bbk:Obs TIME_PERIOD="2005-03-08" OBS_VALUE="-1.99257" BBK_DIFF_A="-21.99257"/>
      <bbk:Obs TIME_PERIOD="2005-03-07" OBS_VALUE="20.0" BBK_DIFF_A="0.28903"/>
      <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="19.71097" BBK_DIFF_A="0.23334"/>
      <bbk:Obs TIME_PERIOD="2005-03-03" OBS_VALUE="19.47763" BBK_DIFF_A="0.23754"/>
      <bbk:Obs TIME_PERIOD="2005-03-02" OBS_VALUE="19.24009" BBK_DIFF_A="-0.09174"/>
      <bbk:Obs TIME_PERIOD="2005-03-01" OBS_VALUE="19.33183" BBK_DIFF_A="0.66967"/>
      <bbk:Obs TIME_PERIOD="2005-02-28" OBS_VALUE="18.66216" BBK_DIFF_A="0.1679"/>
      <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="18.49426" BBK_DIFF_A="-0.11806"/>
      <bbk:Obs TIME_PERIOD="2005-02-24" OBS_VALUE="18.61232" BBK_DIFF_A="0.18404"/>
      <bbk:Obs TIME_PERIOD="2005-02-23" OBS_VALUE="18.42828" BBK_DIFF_A="0.24163"/>
      <bbk:Obs TIME_PERIOD="2005-02-22" OBS_VALUE="18.18665" BBK_DIFF_A="0.07777"/>
      <bbk:Obs TIME_PERIOD="2005-02-21" OBS_VALUE="18.10888" BBK_DIFF_A="0.42859"/>
      <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="17.68029" BBK_DIFF_A="0.1114"/>
      <bbk:Obs TIME_PERIOD="2005-02-17" OBS_VALUE="17.56889" BBK_DIFF_A="0.20693"/>
      <bbk:Obs TIME_PERIOD="2005-02-16" OBS_VALUE="17.36196" BBK_DIFF_A="0.26497"/>
      <bbk:Obs TIME_PERIOD="2005-02-15" OBS_VALUE="17.09699" BBK_DIFF_A="-0.27851"/>
      <bbk:Obs TIME_PERIOD="2005-02-14" OBS_VALUE="17.3755" BBK_DIFF_A="1.66954"/>
      <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="15.70596" BBK_DIFF_A="0.20893"/>
      <bbk:Obs TIME_PERIOD="2005-02-10" OBS_VALUE="15.49703" BBK_DIFF_A="-0.16725"/>
      <bbk:Obs TIME_PERIOD="2005-02-09" OBS_VALUE="15.66428" BBK_DIFF_A="-0.09129"/>
      <bbk:Obs TIME_PERIOD="2005-02-08" OBS_VALUE="15.75557" BBK_DIFF_A="-0.38347"/>
      <bbk:Obs TIME_PERIOD="2005-02-07" OBS_VALUE="16.13904" BBK_DIFF_A="-0.21073"/>
      <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="16.34977" BBK_DIFF_A="-0.0575"/>
      <bbk:Obs TIME_PERIOD="2005-02-03" OBS_VALUE="16.40727" BBK_DIFF_A="-0.19572"/>
      <bbk:Obs TIME_PERIOD="2005-02-02" OBS_VALUE="16.60299" BBK_DIFF_A="-0.20164"/>
      <bbk:Obs TIME_PERIOD="2005-02-01" OBS_VALUE="16.80463" BBK_DIFF_A="-0.37588"/>
      <bbk:Obs TIME_PERIOD="2005-01-31" OBS_VALUE="17.18051" BBK_DIFF_A="-0.18928"/>
      <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="17.36979" BBK_DIFF_A="0.06127"/>
      <bbk:Obs TIME_PERIOD="2005-01-27" OBS_VALUE="17.30852" BBK_DIFF_A="-0.49521"/>
      <bbk:Obs TIME_PERIOD="2005-01-26" OBS_VALUE="17.80373" BBK_DIFF_A="-0.02228"/>
      <bbk:Obs TIME_PERIOD="2005-01-25" OBS_VALUE="17.82601" BBK_DIFF_A="0.12079"/>
      <bbk:Obs TIME_PERIOD="2005-01-24" OBS_VALUE="17.70522" BBK_DIFF_A="0.70386"/>
      <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="17.00136" BBK_DIFF_A="0.23209"/>
      <bbk:Obs TIME_PERIOD="2005-01-20" OBS_VALUE="16.76927" BBK_DIFF_A="-0.45538"/>
      <bbk:Obs TIME_PERIOD="2005-01-19" OBS_VALUE="17.22465" BBK_DIFF_A="-0.21983"/>
      <bbk:Obs TIME_PERIOD="2005-01-18" OBS_VALUE="17.44448" BBK_DIFF_A="-0.89224"/>
      <bbk:Obs TIME_PERIOD="2005-01-17" OBS_VALUE="18.33672" BBK_DIFF_A="0.18211"/>
      <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="18.15461" BBK_DIFF_A="1.47489"/>
      <bbk:Obs TIME_PERIOD="2005-01-13" OBS_VALUE="16.67972" BBK_DIFF_A="-0.27368"/>
      <bbk:Obs TIME_PERIOD="2005-01-12" OBS_VALUE="16.9534" BBK_DIFF_A="-0.04733"/>
      <bbk:Obs TIME_PERIOD="2005-01-11" OBS_VALUE="17.00073" BBK_DIFF_A="16.00107"/>
      <bbk:Obs TIME_PERIOD="2005-01-10" OBS_VALUE="0.99966" BBK_DIFF_A="-15.95572"/>
      <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="16.95538" BBK_DIFF_A="16.34301"/>
      <bbk:Obs TIME_PERIOD="2005-01-06" OBS_VALUE="0.61237" BBK_DIFF_A="-0.86072"/>
      <bbk:Obs TIME_PERIOD="2005-01-05" OBS_VALUE="1.47309" BBK_DIFF_A="-15.0043"/>
      <bbk:Obs TIME_PERIOD="2005-01-04" OBS_VALUE="16.47739" BBK_DIFF_A="-0.48865"/>
      <bbk:Obs TIME_PERIOD="2005-01-03" OBS_VALUE="16.96604" BBK_DIFF_A="0.14194"/>
      <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="16.8241" BBK_DIFF_A="-0.65253"/>
      <bbk:Obs TIME_PERIOD="2004-12-29" OBS_VALUE="17.47663" BBK_DIFF_A="17.58124"/>
      <bbk:Obs TIME_PERIOD="2004-12-28" OBS_VALUE="-0.10461" BBK_DIFF_A="0.03217"/>
      <bbk:Obs TIME_PERIOD="2004-12-27" OBS_VALUE="-0.13678" BBK_DIFF_A="-0.11297"/>
      <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="-0.02381" BBK_DIFF_A="0.01099"/>
      <bbk:Obs TIME_PERIOD="2004-12-22" OBS_VALUE="-0.0348" BBK_DIFF_A="0.37989"/>
      <bbk:Obs TIME_PERIOD="2004-12-21" OBS_VALUE="-0.41469" BBK_DIFF_A="0.01001"/>
      <bbk:Obs TIME_PERIOD="2004-12-20" OBS_VALUE="-0.4247" BBK_DIFF_A="0.01632"/>
      <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="-0.44102" BBK_DIFF_A="0.09618"/>
      <bbk:Obs TIME_PERIOD="2004-12-16" OBS_VALUE="-0.5372" BBK_DIFF_A="0.0759"/>
      <bbk:Obs TIME_PERIOD="2004-12-15" OBS_VALUE="-0.6131" BBK_DIFF_A="0.05025"/>
      <bbk:Obs TIME_PERIOD="2004-12-14" OBS_VALUE="-0.66335" BBK_DIFF_A="0.00901"/>
      <bbk:Obs TIME_PERIOD="2004-12-13" OBS_VALUE="-0.67236" BBK_DIFF_A="0.02907"/>
      <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="-0.70143" BBK_DIFF_A="0.11135"/>
      <bbk:Obs TIME_PERIOD="2004-12-09" OBS_VALUE="-0.81278" BBK_DIFF_A="0.03188"/>
      <bbk:Obs TIME_PERIOD="2004-12-08" OBS_VALUE="-0.84466" BBK_DIFF_A="0.0479"/>
      <bbk:Obs TIME_PERIOD="2004-12-07" OBS_VALUE="-0.89256" BBK_DIFF_A="0.0262"/>
      <bbk:Obs TIME_PERIOD="2004-12-06" OBS_VALUE="-0.91876" BBK_DIFF_A="-0.36604"/>
      <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="-0.55272" BBK_DIFF_A="0.26063"/>
      <bbk:Obs TIME_PERIOD="2004-12-02" OBS_VALUE="-0.81335" BBK_DIFF_A="0.0316"/>
      <bbk:Obs TIME_PERIOD="2004-12-01" OBS_VALUE="-0.84495" BBK_DIFF_A="-0.17593"/>
      <bbk:Obs TIME_PERIOD="2004-11-30" OBS_VALUE="-0.66902" BBK_DIFF_A="0.05367"/>
      <bbk:Obs TIME_PERIOD="2004-11-29" OBS_VALUE="-0.72269" BBK_DIFF_A="0.01788"/>
      <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="-0.74057" BBK_DIFF_A="0.02597"/>
      <bbk:Obs TIME_PERIOD="2004-11-25" OBS_VALUE="-0.76654" BBK_DIFF_A="-0.10128"/>
      <bbk:Obs TIME_PERIOD="2004-11-24" OBS_VALUE="-0.66526" BBK_DIFF_A="-0.13388"/>
      <bbk:Obs TIME_PERIOD="2004-11-23" OBS_VALUE="-0.53138" BBK_DIFF_A="0.03187"/>
      <bbk:Obs TIME_PERIOD="2004-11-22" OBS_VALUE="-0.56325" BBK_DIFF_A="0.0135"/>
      <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="-0.57675" BBK_DIFF_A="0.09984"/>
      <bbk:Obs TIME_PERIOD="2004-11-18" OBS_VALUE="-0.67659" BBK_DIFF_A="0.01526"/>
      <bbk:Obs TIME_PERIOD="2004-11-17" OBS_VALUE="-0.69185" BBK_DIFF_A="0.00107"/>
      <bbk:Obs TIME_PERIOD="2004-11-16" OBS_VALUE="-0.69292" BBK_DIFF_A="0.07159"/>
      <bbk:Obs TIME_PERIOD="2004-11-15" OBS_VALUE="-0.76451" BBK_DIFF_A="0.0152"/>
      <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="-0.77971" BBK_DIFF_A="-0.27856"/>
      <bbk:Obs TIME_PERIOD="2004-11-11" OBS_VALUE="-0.50115" BBK_DIFF_A="0.08488"/>
      <bbk:Obs TIME_PERIOD="2004-11-10" OBS_VALUE="-0.58603" BBK_DIFF_A="-0.24988"/>
      <bbk:Obs TIME_PERIOD="2004-11-09" OBS_VALUE="-0.33615" BBK_DIFF_A="0.05161"/>
      <bbk:Obs TIME_PERIOD="2004-11-08" OBS_VALUE="-0.38776" BBK_DIFF_A="0.15261"/>
      <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="-0.54037" BBK_DIFF_A="0.0148"/>
      <bbk:Obs TIME_PERIOD="2004-11-04" OBS_VALUE="-0.55517" BBK_DIFF_A="-0.02526"/>
      <bbk:Obs TIME_PERIOD="2004-11-03" OBS_VALUE="-0.52991" BBK_DIFF_A="0.06041"/>
      <bbk:Obs TIME_PERIOD="2004-11-02" OBS_VALUE="-0.59032" BBK_DIFF_A="0.067"/>
      <bbk:Obs TIME_PERIOD="2004-11-01" OBS_VALUE="-0.65732" BBK_DIFF_A="0.04786"/>
      <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="-0.70518" BBK_DIFF_A="4.93942"/>
      <bbk:Obs TIME_PERIOD="2004-10-28" OBS_VALUE="-5.6446" BBK_DIFF_A="-0.22215"/>
      <bbk:Obs TIME_PERIOD="2004-10-27" OBS_VALUE="-5.42245" BBK_DIFF_A="-0.60459"/>
      <bbk:Obs TIME_PERIOD="2004-10-26" OBS_VALUE="-4.81786" BBK_DIFF_A="-3.9431"/>
      <bbk:Obs TIME_PERIOD="2004-10-25" OBS_VALUE="-0.87476" BBK_DIFF_A="4.20709"/>
      <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="-5.08185" BBK_DIFF_A="-0.02995"/>
      <bbk:Obs TIME_PERIOD="2004-10-21" OBS_VALUE="-5.0519" BBK_DIFF_A="-0.21646"/>
      <bbk:Obs TIME_PERIOD="2004-10-20" OBS_VALUE="-4.83544" BBK_DIFF_A="0.26094"/>
      <bbk:Obs TIME_PERIOD="2004-10-19" OBS_VALUE="-5.09638" BBK_DIFF_A="0.06544"/>
      <bbk:Obs TIME_PERIOD="2004-10-18" OBS_VALUE="-5.16182" BBK_DIFF_A="-0.11779"/>
      <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="-5.04403" BBK_DIFF_A="0.10323"/>
      <bbk:Obs TIME_PERIOD="2004-10-14" OBS_VALUE="-5.14726" BBK_DIFF_A="0.3757"/>
      <bbk:Obs TIME_PERIOD="2004-10-13" OBS_VALUE="-5.52296" BBK_DIFF_A="-0.36181"/>
      <bbk:Obs TIME_PERIOD="2004-10-12" OBS_VALUE="-5.16115" BBK_DIFF_A="-0.00499"/>
      <bbk:Obs TIME_PERIOD="2004-10-11" OBS_VALUE="-5.15616" BBK_DIFF_A="-0.04329"/>
      <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="-5.11287" BBK_DIFF_A="0.12189"/>
      <bbk:Obs TIME_PERIOD="2004-10-07" OBS_VALUE="-5.23476" BBK_DIFF_A="-0.14647"/>
      <bbk:Obs TIME_PERIOD="2004-10-06" OBS_VALUE="-5.08829" BBK_DIFF_A="-0.15097"/>
      <bbk:Obs TIME_PERIOD="2004-10-05" OBS_VALUE="-4.93732" BBK_DIFF_A="0.17947"/>
      <bbk:Obs TIME_PERIOD="2004-10-04" OBS_VALUE="-5.11679" BBK_DIFF_A="-0.16283"/>
      <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="-4.95396" BBK_DIFF_A="0.31081"/>
      <bbk:Obs TIME_PERIOD="2004-09-30" OBS_VALUE="-5.26477" BBK_DIFF_A="0.0491"/>
      <bbk:Obs TIME_PERIOD="2004-09-29" OBS_VALUE="-5.31387" BBK_DIFF_A="-0.2068"/>
      <bbk:Obs TIME_PERIOD="2004-09-28" OBS_VALUE="-5.10707" BBK_DIFF_A="0.08209"/>
      <bbk:Obs TIME_PERIOD="2004-09-27" OBS_VALUE="-5.18916" BBK_DIFF_A="-0.07566"/>
      <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="-5.1135" BBK_DIFF_A="-0.01758"/>
      <bbk:Obs TIME_PERIOD="2004-09-23" OBS_VALUE="-5.09592" BBK_DIFF_A="-0.26288"/>
      <bbk:Obs TIME_PERIOD="2004-09-22" OBS_VALUE="-4.83304" BBK_DIFF_A="0.11604"/>
      <bbk:Obs TIME_PERIOD="2004-09-21" OBS_VALUE="-4.94908" BBK_DIFF_A="-0.02188"/>
      <bbk:Obs TIME_PERIOD="2004-09-20" OBS_VALUE="-4.9272" BBK_DIFF_A="-0.36508"/>
      <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="-4.56212" BBK_DIFF_A="0.30945"/>
      <bbk:Obs TIME_PERIOD="2004-09-16" OBS_VALUE="-4.87157" BBK_DIFF_A="-0.04425"/>
      <bbk:Obs TIME_PERIOD="2004-09-15" OBS_VALUE="-4.82732" BBK_DIFF_A="0.00562"/>
      <bbk:Obs TIME_PERIOD="2004-09-14" OBS_VALUE="-4.83294" BBK_DIFF_A="0.08598"/>
      <bbk:Obs TIME_PERIOD="2004-09-13" OBS_VALUE="-4.91892" BBK_DIFF_A="-0.0569"/>
      <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="-4.86202" BBK_DIFF_A="-0.03671"/>
      <bbk:Obs TIME_PERIOD="2004-09-09" OBS_VALUE="-4.82531" BBK_DIFF_A="-0.15832"/>
      <bbk:Obs TIME_PERIOD="2004-09-08" OBS_VALUE="-4.66699" BBK_DIFF_A="-0.02867"/>
      <bbk:Obs TIME_PERIOD="2004-09-07" OBS_VALUE="-4.63832" BBK_DIFF_A="-0.01823"/>
      <bbk:Obs TIME_PERIOD="2004-09-06" OBS_VALUE="-4.62009" BBK_DIFF_A="0.0078"/>
      <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="-4.62789" BBK_DIFF_A="-0.06072"/>
      <bbk:Obs TIME_PERIOD="2004-09-02" OBS_VALUE="-4.56717" BBK_DIFF_A="0.11887"/>
      <bbk:Obs TIME_PERIOD="2004-09-01" OBS_VALUE="-4.68604" BBK_DIFF_A="-0.26205"/>
      <bbk:Obs TIME_PERIOD="2004-08-31" OBS_VALUE="-4.42399" BBK_DIFF_A="-0.2244"/>
      <bbk:Obs TIME_PERIOD="2004-08-30" OBS_VALUE="-4.19959" BBK_DIFF_A="0.03198"/>
      <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="-4.23157" BBK_DIFF_A="-0.20669"/>
      <bbk:Obs TIME_PERIOD="2004-08-26" OBS_VALUE="-4.02488" BBK_DIFF_A="-0.12552"/>
      <bbk:Obs TIME_PERIOD="2004-08-25" OBS_VALUE="-3.89936" BBK_DIFF_A="0.36942"/>
      <bbk:Obs TIME_PERIOD="2004-08-24" OBS_VALUE="-4.26878" BBK_DIFF_A="-0.31243"/>
      <bbk:Obs TIME_PERIOD="2004-08-23" OBS_VALUE="-3.95635" BBK_DIFF_A="0.25416"/>
      <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="-4.21051" BBK_DIFF_A="0.17713"/>
      <bbk:Obs TIME_PERIOD="2004-08-19" OBS_VALUE="-4.38764" BBK_DIFF_A="0.10068"/>
      <bbk:Obs TIME_PERIOD="2004-08-18" OBS_VALUE="-4.48832" BBK_DIFF_A="0.02003"/>
      <bbk:Obs TIME_PERIOD="2004-08-17" OBS_VALUE="-4.50835" BBK_DIFF_A="0.07654"/>
      <bbk:Obs TIME_PERIOD="2004-08-16" OBS_VALUE="-4.58489" BBK_DIFF_A="-0.18385"/>
      <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="-4.40104" BBK_DIFF_A="-0.00256"/>
      <bbk:Obs TIME_PERIOD="2004-08-12" OBS_VALUE="-4.39848" BBK_DIFF_A="0.15352"/>
      <bbk:Obs TIME_PERIOD="2004-08-11" OBS_VALUE="-4.552" BBK_DIFF_A="-0.13409"/>
      <bbk:Obs TIME_PERIOD="2004-08-10" OBS_VALUE="-4.41791" BBK_DIFF_A="0.11066"/>
      <bbk:Obs TIME_PERIOD="2004-08-09" OBS_VALUE="-4.52857" BBK_DIFF_A="-0.3035"/>
      <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="-4.22507" BBK_DIFF_A="-0.17075"/>
      <bbk:Obs TIME_PERIOD="2004-08-05" OBS_VALUE="-4.05432" BBK_DIFF_A="0.09393"/>
      <bbk:Obs TIME_PERIOD="2004-08-04" OBS_VALUE="-4.14825" BBK_DIFF_A="0.02977"/>
      <bbk:Obs TIME_PERIOD="2004-08-03" OBS_VALUE="-4.17802" BBK_DIFF_A="0.03785"/>
      <bbk:Obs TIME_PERIOD="2004-08-02" OBS_VALUE="-4.21587" BBK_DIFF_A="-0.17897"/>
      <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="-4.0369" BBK_DIFF_A="8.7E-4"/>
      <bbk:Obs TIME_PERIOD="2004-07-29" OBS_VALUE="-4.03777" BBK_DIFF_A="0.05461"/>
      <bbk:Obs TIME_PERIOD="2004-07-28" OBS_VALUE="-4.09238" BBK_DIFF_A="-0.10266"/>
      <bbk:Obs TIME_PERIOD="2004-07-27" OBS_VALUE="-3.98972" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="2004-07-26" OBS_VALUE="-3.98972" BBK_DIFF_A="0.12375"/>
      <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="-4.11347" BBK_DIFF_A="0.18116"/>
      <bbk:Obs TIME_PERIOD="2004-07-22" OBS_VALUE="-4.29463" BBK_DIFF_A="0.09269"/>
      <bbk:Obs TIME_PERIOD="2004-07-21" OBS_VALUE="-4.38732" BBK_DIFF_A="-0.01845"/>
      <bbk:Obs TIME_PERIOD="2004-07-20" OBS_VALUE="-4.36887" BBK_DIFF_A="-0.25268"/>
      <bbk:Obs TIME_PERIOD="2004-07-19" OBS_VALUE="-4.11619" BBK_DIFF_A="0.02396"/>
      <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="-4.14015" BBK_DIFF_A="0.01779"/>
      <bbk:Obs TIME_PERIOD="2004-07-15" OBS_VALUE="-4.15794" BBK_DIFF_A="-0.03372"/>
      <bbk:Obs TIME_PERIOD="2004-07-14" OBS_VALUE="-4.12422" BBK_DIFF_A="0.01759"/>
      <bbk:Obs TIME_PERIOD="2004-07-13" OBS_VALUE="-4.14181" BBK_DIFF_A="-0.08508"/>
      <bbk:Obs TIME_PERIOD="2004-07-12" OBS_VALUE="-4.05673" BBK_DIFF_A="0.23464"/>
      <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="-4.29137" BBK_DIFF_A="0.03282"/>
      <bbk:Obs TIME_PERIOD="2004-07-08" OBS_VALUE="-4.32419" BBK_DIFF_A="-0.29487"/>
      <bbk:Obs TIME_PERIOD="2004-07-07" OBS_VALUE="-4.02932" BBK_DIFF_A="0.12948"/>
      <bbk:Obs TIME_PERIOD="2004-07-06" OBS_VALUE="-4.1588" BBK_DIFF_A="-0.11781"/>
      <bbk:Obs TIME_PERIOD="2004-07-05" OBS_VALUE="-4.04099" BBK_DIFF_A="-11.13548"/>
      <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="7.09449" BBK_DIFF_A="0.16309"/>
      <bbk:Obs TIME_PERIOD="2004-07-01" OBS_VALUE="6.9314" BBK_DIFF_A="1.45647"/>
      <bbk:Obs TIME_PERIOD="2004-06-30" OBS_VALUE="5.47493" BBK_DIFF_A="9.68079"/>
      <bbk:Obs TIME_PERIOD="2004-06-29" OBS_VALUE="-4.20586" BBK_DIFF_A="-0.05169"/>
      <bbk:Obs TIME_PERIOD="2004-06-28" OBS_VALUE="-4.15417" BBK_DIFF_A="-0.05998"/>
      <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="-4.09419" BBK_DIFF_A="0.12229"/>
      <bbk:Obs TIME_PERIOD="2004-06-24" OBS_VALUE="-4.21648" BBK_DIFF_A="-0.04843"/>
      <bbk:Obs TIME_PERIOD="2004-06-23" OBS_VALUE="-4.16805" BBK_DIFF_A="-0.07955"/>
      <bbk:Obs TIME_PERIOD="2004-06-22" OBS_VALUE="-4.0885" BBK_DIFF_A="0.09386"/>
      <bbk:Obs TIME_PERIOD="2004-06-21" OBS_VALUE="-4.18236" BBK_DIFF_A="-0.12716"/>
      <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="-4.0552" BBK_DIFF_A="-0.11089"/>
      <bbk:Obs TIME_PERIOD="2004-06-17" OBS_VALUE="-3.94431" BBK_DIFF_A="-0.00519"/>
      <bbk:Obs TIME_PERIOD="2004-06-16" OBS_VALUE="-3.93912" BBK_DIFF_A="0.01598"/>
      <bbk:Obs TIME_PERIOD="2004-06-15" OBS_VALUE="-3.9551" BBK_DIFF_A="0.0474"/>
      <bbk:Obs TIME_PERIOD="2004-06-14" OBS_VALUE="-4.0025" BBK_DIFF_A="0.32828"/>
      <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="-4.33078" BBK_DIFF_A="-0.27249"/>
      <bbk:Obs TIME_PERIOD="2004-06-10" OBS_VALUE="-4.05829" BBK_DIFF_A="0.07169"/>
      <bbk:Obs TIME_PERIOD="2004-06-09" OBS_VALUE="-4.12998" BBK_DIFF_A="0.01268"/>
      <bbk:Obs TIME_PERIOD="2004-06-08" OBS_VALUE="-4.14266" BBK_DIFF_A="-0.16163"/>
      <bbk:Obs TIME_PERIOD="2004-06-07" OBS_VALUE="-3.98103" BBK_DIFF_A="0.07259"/>
      <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="-4.05362" BBK_DIFF_A="0.24274"/>
      <bbk:Obs TIME_PERIOD="2004-06-03" OBS_VALUE="-4.29636" BBK_DIFF_A="0.15064"/>
      <bbk:Obs TIME_PERIOD="2004-06-02" OBS_VALUE="-4.447" BBK_DIFF_A="-0.0536"/>
      <bbk:Obs TIME_PERIOD="2004-06-01" OBS_VALUE="-4.3934" BBK_DIFF_A="-0.14016"/>
      <bbk:Obs TIME_PERIOD="2004-05-31" OBS_VALUE="-4.25324" BBK_DIFF_A="-0.01726"/>
      <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="-4.23598" BBK_DIFF_A="0.08727"/>
      <bbk:Obs TIME_PERIOD="2004-05-27" OBS_VALUE="-4.32325" BBK_DIFF_A="0.02722"/>
      <bbk:Obs TIME_PERIOD="2004-05-26" OBS_VALUE="-4.35047" BBK_DIFF_A="-0.02326"/>
      <bbk:Obs TIME_PERIOD="2004-05-25" OBS_VALUE="-4.32721" BBK_DIFF_A="-0.09658"/>
      <bbk:Obs TIME_PERIOD="2004-05-24" OBS_VALUE="-4.23063" BBK_DIFF_A="-0.01552"/>
      <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="-4.21511" BBK_DIFF_A="-0.15823"/>
      <bbk:Obs TIME_PERIOD="2004-05-20" OBS_VALUE="-4.05688" BBK_DIFF_A="0.22934"/>
      <bbk:Obs TIME_PERIOD="2004-05-19" OBS_VALUE="-4.28622" BBK_DIFF_A="0.04678"/>
      <bbk:Obs TIME_PERIOD="2004-05-18" OBS_VALUE="-4.333" BBK_DIFF_A="-0.20307"/>
      <bbk:Obs TIME_PERIOD="2004-05-17" OBS_VALUE="-4.12993" BBK_DIFF_A="0.14575"/>
      <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="-4.27568" BBK_DIFF_A="0.09079"/>
      <bbk:Obs TIME_PERIOD="2004-05-13" OBS_VALUE="-4.36647" BBK_DIFF_A="0.0606"/>
      <bbk:Obs TIME_PERIOD="2004-05-12" OBS_VALUE="-4.42707" BBK_DIFF_A="0.0565"/>
      <bbk:Obs TIME_PERIOD="2004-05-11" OBS_VALUE="-4.48357" BBK_DIFF_A="0.26682"/>
      <bbk:Obs TIME_PERIOD="2004-05-10" OBS_VALUE="-4.75039" BBK_DIFF_A="-0.10703"/>
      <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="-4.64336" BBK_DIFF_A="-0.19631"/>
      <bbk:Obs TIME_PERIOD="2004-05-06" OBS_VALUE="-4.44705" BBK_DIFF_A="-0.03942"/>
      <bbk:Obs TIME_PERIOD="2004-05-05" OBS_VALUE="-4.40763" BBK_DIFF_A="-0.0827"/>
      <bbk:Obs TIME_PERIOD="2004-05-04" OBS_VALUE="-4.32493" BBK_DIFF_A="0.04007"/>
      <bbk:Obs TIME_PERIOD="2004-05-03" OBS_VALUE="-4.365" BBK_DIFF_A="0.18887"/>
      <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="-4.55387" BBK_DIFF_A="0.24955"/>
      <bbk:Obs TIME_PERIOD="2004-04-29" OBS_VALUE="-4.80342" BBK_DIFF_A="-0.35062"/>
      <bbk:Obs TIME_PERIOD="2004-04-28" OBS_VALUE="-4.4528" BBK_DIFF_A="0.84534"/>
      <bbk:Obs TIME_PERIOD="2004-04-27" OBS_VALUE="-5.29814" BBK_DIFF_A="-0.06455"/>
      <bbk:Obs TIME_PERIOD="2004-04-26" OBS_VALUE="-5.23359" BBK_DIFF_A="0.2398"/>
      <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="-5.47339" BBK_DIFF_A="-0.07409"/>
      <bbk:Obs TIME_PERIOD="2004-04-22" OBS_VALUE="-5.3993" BBK_DIFF_A="0.24405"/>
      <bbk:Obs TIME_PERIOD="2004-04-21" OBS_VALUE="-5.64335" BBK_DIFF_A="-1.04928"/>
      <bbk:Obs TIME_PERIOD="2004-04-20" OBS_VALUE="-4.59407" BBK_DIFF_A="-0.08697"/>
      <bbk:Obs TIME_PERIOD="2004-04-19" OBS_VALUE="-4.5071" BBK_DIFF_A="-0.0306"/>
      <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="-4.4765" BBK_DIFF_A="0.2786"/>
      <bbk:Obs TIME_PERIOD="2004-04-15" OBS_VALUE="-4.7551" BBK_DIFF_A="0.01982"/>
      <bbk:Obs TIME_PERIOD="2004-04-14" OBS_VALUE="-4.77492" BBK_DIFF_A="0.12194"/>
      <bbk:Obs TIME_PERIOD="2004-04-13" OBS_VALUE="-4.89686" BBK_DIFF_A="-0.58487"/>
      <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="-4.31199" BBK_DIFF_A="0.22739"/>
      <bbk:Obs TIME_PERIOD="2004-04-07" OBS_VALUE="-4.53938" BBK_DIFF_A="0.38697"/>
      <bbk:Obs TIME_PERIOD="2004-04-06" OBS_VALUE="-4.92635" BBK_DIFF_A="0.03838"/>
      <bbk:Obs TIME_PERIOD="2004-04-05" OBS_VALUE="-4.96473" BBK_DIFF_A="-0.06844"/>
      <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="-4.89629" BBK_DIFF_A="-0.14545"/>
      <bbk:Obs TIME_PERIOD="2004-04-01" OBS_VALUE="-4.75084" BBK_DIFF_A="-0.16895"/>
      <bbk:Obs TIME_PERIOD="2004-03-31" OBS_VALUE="-4.58189" BBK_DIFF_A="-2.93367"/>
      <bbk:Obs TIME_PERIOD="2004-03-30" OBS_VALUE="-1.64822" BBK_DIFF_A="-0.714"/>
      <bbk:Obs TIME_PERIOD="2004-03-29" OBS_VALUE="-0.93422" BBK_DIFF_A="0.974"/>
      <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="-1.90822" BBK_DIFF_A="0.0553"/>
      <bbk:Obs TIME_PERIOD="2004-03-25" OBS_VALUE="-1.96352" BBK_DIFF_A="-0.06377"/>
      <bbk:Obs TIME_PERIOD="2004-03-24" OBS_VALUE="-1.89975" BBK_DIFF_A="0.02969"/>
      <bbk:Obs TIME_PERIOD="2004-03-23" OBS_VALUE="-1.92944" BBK_DIFF_A="0.10736"/>
      <bbk:Obs TIME_PERIOD="2004-03-22" OBS_VALUE="-2.0368" BBK_DIFF_A="-0.06776"/>
      <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="-1.96904" BBK_DIFF_A="-0.0213"/>
      <bbk:Obs TIME_PERIOD="2004-03-18" OBS_VALUE="-1.94774" BBK_DIFF_A="-0.06693"/>
      <bbk:Obs TIME_PERIOD="2004-03-17" OBS_VALUE="-1.88081" BBK_DIFF_A="0.03474"/>
      <bbk:Obs TIME_PERIOD="2004-03-16" OBS_VALUE="-1.91555" BBK_DIFF_A="0.00448"/>
      <bbk:Obs TIME_PERIOD="2004-03-15" OBS_VALUE="-1.92003" BBK_DIFF_A="0.07419"/>
      <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="-1.99422" BBK_DIFF_A="-0.22503"/>
      <bbk:Obs TIME_PERIOD="2004-03-11" OBS_VALUE="-1.76919" BBK_DIFF_A="0.15245"/>
      <bbk:Obs TIME_PERIOD="2004-03-10" OBS_VALUE="-1.92164" BBK_DIFF_A="0.08749"/>
      <bbk:Obs TIME_PERIOD="2004-03-09" OBS_VALUE="-2.00913" BBK_DIFF_A="0.04109"/>
      <bbk:Obs TIME_PERIOD="2004-03-08" OBS_VALUE="-2.05022" BBK_DIFF_A="-0.70825"/>
      <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="-1.34197" BBK_DIFF_A="-0.00334"/>
      <bbk:Obs TIME_PERIOD="2004-03-04" OBS_VALUE="-1.33863" BBK_DIFF_A="0.13039"/>
      <bbk:Obs TIME_PERIOD="2004-03-03" OBS_VALUE="-1.46902" BBK_DIFF_A="3.17528"/>
      <bbk:Obs TIME_PERIOD="2004-03-02" OBS_VALUE="-4.6443" BBK_DIFF_A="0.52138"/>
      <bbk:Obs TIME_PERIOD="2004-03-01" OBS_VALUE="-5.16568" BBK_DIFF_A="0.36174"/>
      <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="-5.52742" BBK_DIFF_A="0.00238"/>
      <bbk:Obs TIME_PERIOD="2004-02-26" OBS_VALUE="-5.5298" BBK_DIFF_A="-0.04535"/>
      <bbk:Obs TIME_PERIOD="2004-02-25" OBS_VALUE="-5.48445" BBK_DIFF_A="0.33188"/>
      <bbk:Obs TIME_PERIOD="2004-02-24" OBS_VALUE="-5.81633" BBK_DIFF_A="-4.62183"/>
      <bbk:Obs TIME_PERIOD="2004-02-23" OBS_VALUE="-1.1945" BBK_DIFF_A="0.10738"/>
      <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="-1.30188" BBK_DIFF_A="0.08762"/>
      <bbk:Obs TIME_PERIOD="2004-02-19" OBS_VALUE="-1.3895" BBK_DIFF_A="0.15268"/>
      <bbk:Obs TIME_PERIOD="2004-02-18" OBS_VALUE="-1.54218" BBK_DIFF_A="-0.10139"/>
      <bbk:Obs TIME_PERIOD="2004-02-17" OBS_VALUE="-1.44079" BBK_DIFF_A="0.03899"/>
      <bbk:Obs TIME_PERIOD="2004-02-16" OBS_VALUE="-1.47978" BBK_DIFF_A="-0.10312"/>
      <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="-1.37666" BBK_DIFF_A="-0.02759"/>
      <bbk:Obs TIME_PERIOD="2004-02-12" OBS_VALUE="-1.34907" BBK_DIFF_A="0.0164"/>
      <bbk:Obs TIME_PERIOD="2004-02-11" OBS_VALUE="-1.36547" BBK_DIFF_A="0.06705"/>
      <bbk:Obs TIME_PERIOD="2004-02-10" OBS_VALUE="-1.43252" BBK_DIFF_A="-0.02494"/>
      <bbk:Obs TIME_PERIOD="2004-02-09" OBS_VALUE="-1.40758" BBK_DIFF_A="-0.37396"/>
      <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="-1.03362" BBK_DIFF_A="2.7E-4"/>
      <bbk:Obs TIME_PERIOD="2004-02-05" OBS_VALUE="-1.03389" BBK_DIFF_A="0.09194"/>
      <bbk:Obs TIME_PERIOD="2004-02-04" OBS_VALUE="-1.12583" BBK_DIFF_A="-0.02104"/>
      <bbk:Obs TIME_PERIOD="2004-02-03" OBS_VALUE="-1.10479" BBK_DIFF_A="-0.09809"/>
      <bbk:Obs TIME_PERIOD="2004-02-02" OBS_VALUE="-1.0067" BBK_DIFF_A="0.07507"/>
      <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="-1.08177" BBK_DIFF_A="0.14549"/>
      <bbk:Obs TIME_PERIOD="2004-01-29" OBS_VALUE="-1.22726" BBK_DIFF_A="0.12804"/>
      <bbk:Obs TIME_PERIOD="2004-01-28" OBS_VALUE="-1.3553" BBK_DIFF_A="-0.35001"/>
      <bbk:Obs TIME_PERIOD="2004-01-27" OBS_VALUE="-1.00529" BBK_DIFF_A="0.3355"/>
      <bbk:Obs TIME_PERIOD="2004-01-26" OBS_VALUE="-1.34079" BBK_DIFF_A="0.02672"/>
      <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="-1.36751" BBK_DIFF_A="0.01911"/>
      <bbk:Obs TIME_PERIOD="2004-01-22" OBS_VALUE="-1.38662" BBK_DIFF_A="-0.07515"/>
      <bbk:Obs TIME_PERIOD="2004-01-21" OBS_VALUE="-1.31147" BBK_DIFF_A="-0.08232"/>
      <bbk:Obs TIME_PERIOD="2004-01-20" OBS_VALUE="-1.22915" BBK_DIFF_A="0.04623"/>
      <bbk:Obs TIME_PERIOD="2004-01-19" OBS_VALUE="-1.27538" BBK_DIFF_A="-0.07332"/>
      <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="-1.20206" BBK_DIFF_A="-0.04833"/>
      <bbk:Obs TIME_PERIOD="2004-01-15" OBS_VALUE="-1.15373" BBK_DIFF_A="0.18235"/>
      <bbk:Obs TIME_PERIOD="2004-01-14" OBS_VALUE="-1.33608" BBK_DIFF_A="0.03984"/>
      <bbk:Obs TIME_PERIOD="2004-01-13" OBS_VALUE="-1.37592" BBK_DIFF_A="0.13888"/>
      <bbk:Obs TIME_PERIOD="2004-01-12" OBS_VALUE="-1.5148" BBK_DIFF_A="-0.45185"/>
      <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="-1.06295" BBK_DIFF_A="-0.02762"/>
      <bbk:Obs TIME_PERIOD="2004-01-08" OBS_VALUE="-1.03533" BBK_DIFF_A="0.08119"/>
      <bbk:Obs TIME_PERIOD="2004-01-07" OBS_VALUE="-1.11652" BBK_DIFF_A="1.23804"/>
      <bbk:Obs TIME_PERIOD="2004-01-06" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-01-05" BBK_OBS_STATUS="K"/>
      <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" BBK_OBS_STATUS="K"/>
      <bbk:Obs TIME_PERIOD="2004-01-01" BBK_OBS_STATUS="K"/>
    </bbk:Series>
  </bbk:DataSet>
</CompactData>
