<?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_M_I_ZST_ZI_EUR_S1311_B_A604_R08XX_R_A_A__Z__Z_A</ID>
    <Test>false</Test>
    <Truncated>false</Truncated>
    <Prepared>2026-04-07T21:39:15</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="M" BBK_ID="BBSIS.M.I.ZST.ZI.EUR.S1311.B.A604.R08XX.R.A.A._Z._Z.A" DECIMALS="2" UNIT="Prozent" UNIT_MULT="0" BBK_TITLE="Zinsstrukturkurve (Svensson-Methode) / Börsennotierte Bundeswertpapiere / 8,0 Jahr(e) RLZ / Monatswerte" BBK_TITLE_ENG="Term structure of interest rates on listed Federal securities (method by Svensson) / residual maturity of 8.0 years / monthly data">
      <bbk:Obs TIME_PERIOD="2026-03" OBS_VALUE="2.96" BBK_DIFF="15.2" BBK_DIFF_Y="14.4"/>
      <bbk:Obs TIME_PERIOD="2026-02" OBS_VALUE="2.57" BBK_DIFF="-5.7" BBK_DIFF_Y="11.6"/>
      <bbk:Obs TIME_PERIOD="2026-01" OBS_VALUE="2.72" BBK_DIFF="-1.3" BBK_DIFF_Y="13.5"/>
      <bbk:Obs TIME_PERIOD="2025-12" OBS_VALUE="2.76" BBK_DIFF="6.7" BBK_DIFF_Y="18.5"/>
      <bbk:Obs TIME_PERIOD="2025-11" OBS_VALUE="2.58" BBK_DIFF="1.9" BBK_DIFF_Y="25.3"/>
      <bbk:Obs TIME_PERIOD="2025-10" OBS_VALUE="2.54" BBK_DIFF="-2.2" BBK_DIFF_Y="7.5"/>
      <bbk:Obs TIME_PERIOD="2025-09" OBS_VALUE="2.59" BBK_DIFF="1.2" BBK_DIFF_Y="23.6"/>
      <bbk:Obs TIME_PERIOD="2025-08" OBS_VALUE="2.56" BBK_DIFF="-0.1" BBK_DIFF_Y="16.3"/>
      <bbk:Obs TIME_PERIOD="2025-07" OBS_VALUE="2.57" BBK_DIFF="3.8" BBK_DIFF_Y="13.5"/>
      <bbk:Obs TIME_PERIOD="2025-06" OBS_VALUE="2.47" BBK_DIFF="2.6" BBK_DIFF_Y="2.4"/>
      <bbk:Obs TIME_PERIOD="2025-05" OBS_VALUE="2.41" BBK_DIFF="2.8" BBK_DIFF_Y="-9.3"/>
      <bbk:Obs TIME_PERIOD="2025-04" OBS_VALUE="2.35" BBK_DIFF="-9.2" BBK_DIFF_Y="-6.2"/>
      <bbk:Obs TIME_PERIOD="2025-03" OBS_VALUE="2.58" BBK_DIFF="12.4" BBK_DIFF_Y="13.7"/>
      <bbk:Obs TIME_PERIOD="2025-02" OBS_VALUE="2.3" BBK_DIFF="-4.1" BBK_DIFF_Y="-6.3"/>
      <bbk:Obs TIME_PERIOD="2025-01" OBS_VALUE="2.4" BBK_DIFF="3.0" BBK_DIFF_Y="11.6"/>
      <bbk:Obs TIME_PERIOD="2024-12" OBS_VALUE="2.33" BBK_DIFF="12.9" BBK_DIFF_Y="18.5"/>
      <bbk:Obs TIME_PERIOD="2024-11" OBS_VALUE="2.06" BBK_DIFF="-12.6" BBK_DIFF_Y="-11.8"/>
      <bbk:Obs TIME_PERIOD="2024-10" OBS_VALUE="2.36" BBK_DIFF="12.4" BBK_DIFF_Y="-12.9"/>
      <bbk:Obs TIME_PERIOD="2024-09" OBS_VALUE="2.1" BBK_DIFF="-4.8" BBK_DIFF_Y="-25.1"/>
      <bbk:Obs TIME_PERIOD="2024-08" OBS_VALUE="2.2" BBK_DIFF="-2.5" BBK_DIFF_Y="-10.2"/>
      <bbk:Obs TIME_PERIOD="2024-07" OBS_VALUE="2.26" BBK_DIFF="-6.4" BBK_DIFF_Y="-8.8"/>
      <bbk:Obs TIME_PERIOD="2024-06" OBS_VALUE="2.42" BBK_DIFF="-9.1" BBK_DIFF_Y="-0.8"/>
      <bbk:Obs TIME_PERIOD="2024-05" OBS_VALUE="2.66" BBK_DIFF="6.3" BBK_DIFF_Y="18.0"/>
      <bbk:Obs TIME_PERIOD="2024-04" OBS_VALUE="2.5" BBK_DIFF="10.0" BBK_DIFF_Y="7.6"/>
      <bbk:Obs TIME_PERIOD="2024-03" OBS_VALUE="2.27" BBK_DIFF="-7.3" BBK_DIFF_Y="-2.8"/>
      <bbk:Obs TIME_PERIOD="2024-02" OBS_VALUE="2.45" BBK_DIFF="14.2" BBK_DIFF_Y="-6.7"/>
      <bbk:Obs TIME_PERIOD="2024-01" OBS_VALUE="2.15" BBK_DIFF="9.4" BBK_DIFF_Y="-4.4"/>
      <bbk:Obs TIME_PERIOD="2023-12" OBS_VALUE="1.96" BBK_DIFF="-16.0" BBK_DIFF_Y="-21.3"/>
      <bbk:Obs TIME_PERIOD="2023-11" OBS_VALUE="2.34" BBK_DIFF="-13.7" BBK_DIFF_Y="21.5"/>
      <bbk:Obs TIME_PERIOD="2023-10" OBS_VALUE="2.71" BBK_DIFF="-3.4" BBK_DIFF_Y="27.1"/>
      <bbk:Obs TIME_PERIOD="2023-09" OBS_VALUE="2.8" BBK_DIFF="14.2" BBK_DIFF_Y="35.7"/>
      <bbk:Obs TIME_PERIOD="2023-08" OBS_VALUE="2.46" BBK_DIFF="-1.0" BBK_DIFF_Y="71.2"/>
      <bbk:Obs TIME_PERIOD="2023-07" OBS_VALUE="2.48" BBK_DIFF="1.9" BBK_DIFF_Y="216.7"/>
      <bbk:Obs TIME_PERIOD="2023-06" OBS_VALUE="2.43" BBK_DIFF="8.1" BBK_DIFF_Y="86.1"/>
      <bbk:Obs TIME_PERIOD="2023-05" OBS_VALUE="2.25" BBK_DIFF="-3.1" BBK_DIFF_Y="130.7"/>
      <bbk:Obs TIME_PERIOD="2023-04" OBS_VALUE="2.32" BBK_DIFF="-0.6" BBK_DIFF_Y="192.6"/>
      <bbk:Obs TIME_PERIOD="2023-03" OBS_VALUE="2.34" BBK_DIFF="-11.0" BBK_DIFF_Y="343.6"/>
      <bbk:Obs TIME_PERIOD="2023-02" OBS_VALUE="2.63" BBK_DIFF="17.0" BBK_DIFF_Y="3451.4"/>
      <bbk:Obs TIME_PERIOD="2023-01" OBS_VALUE="2.25" BBK_DIFF="-9.9" BBK_DIFF_Y="1578.3"/>
      <bbk:Obs TIME_PERIOD="2022-12" OBS_VALUE="2.5" BBK_DIFF="29.7" BBK_DIFF_Y="863.0"/>
      <bbk:Obs TIME_PERIOD="2022-11" OBS_VALUE="1.92" BBK_DIFF="-9.7" BBK_DIFF_Y="487.1"/>
      <bbk:Obs TIME_PERIOD="2022-10" OBS_VALUE="2.13" BBK_DIFF="3.2" BBK_DIFF_Y="1018.5"/>
      <bbk:Obs TIME_PERIOD="2022-09" OBS_VALUE="2.07" BBK_DIFF="44.0" BBK_DIFF_Y="661.1"/>
      <bbk:Obs TIME_PERIOD="2022-08" OBS_VALUE="1.43" BBK_DIFF="83.1" BBK_DIFF_Y="349.0"/>
      <bbk:Obs TIME_PERIOD="2022-07" OBS_VALUE="0.78" BBK_DIFF="-40.1" BBK_DIFF_Y="230.5"/>
      <bbk:Obs TIME_PERIOD="2022-06" OBS_VALUE="1.31" BBK_DIFF="34.0" BBK_DIFF_Y="456.4"/>
      <bbk:Obs TIME_PERIOD="2022-05" OBS_VALUE="0.98" BBK_DIFF="22.9" BBK_DIFF_Y="406.9"/>
      <bbk:Obs TIME_PERIOD="2022-04" OBS_VALUE="0.79" BBK_DIFF="50.7" BBK_DIFF_Y="324.3"/>
      <bbk:Obs TIME_PERIOD="2022-03" OBS_VALUE="0.53" BBK_DIFF="612.2" BBK_DIFF_Y="227.3"/>
      <bbk:Obs TIME_PERIOD="2022-02" OBS_VALUE="0.07" BBK_DIFF="148.7" BBK_DIFF_Y="118.9"/>
      <bbk:Obs TIME_PERIOD="2022-01" OBS_VALUE="-0.15" BBK_DIFF="53.5" BBK_DIFF_Y="76.1"/>
      <bbk:Obs TIME_PERIOD="2021-12" OBS_VALUE="-0.33" BBK_DIFF="34.2" BBK_DIFF_Y="49.3"/>
      <bbk:Obs TIME_PERIOD="2021-11" OBS_VALUE="-0.5" BBK_DIFF="-114.2" BBK_DIFF_Y="26.3"/>
      <bbk:Obs TIME_PERIOD="2021-10" OBS_VALUE="-0.23" BBK_DIFF="37.0" BBK_DIFF_Y="68.1"/>
      <bbk:Obs TIME_PERIOD="2021-09" OBS_VALUE="-0.37" BBK_DIFF="36.1" BBK_DIFF_Y="43.1"/>
      <bbk:Obs TIME_PERIOD="2021-08" OBS_VALUE="-0.58" BBK_DIFF="4.0" BBK_DIFF_Y="-13.6"/>
      <bbk:Obs TIME_PERIOD="2021-07" OBS_VALUE="-0.6" BBK_DIFF="-63.5" BBK_DIFF_Y="8.5"/>
      <bbk:Obs TIME_PERIOD="2021-06" OBS_VALUE="-0.37" BBK_DIFF="-15.4" BBK_DIFF_Y="37.9"/>
      <bbk:Obs TIME_PERIOD="2021-05" OBS_VALUE="-0.32" BBK_DIFF="10.2" BBK_DIFF_Y="36.5"/>
      <bbk:Obs TIME_PERIOD="2021-04" OBS_VALUE="-0.35" BBK_DIFF="14.5" BBK_DIFF_Y="39.5"/>
      <bbk:Obs TIME_PERIOD="2021-03" OBS_VALUE="-0.41" BBK_DIFF="-5.9" BBK_DIFF_Y="25.8"/>
      <bbk:Obs TIME_PERIOD="2021-02" OBS_VALUE="-0.39" BBK_DIFF="38.4" BBK_DIFF_Y="42.9"/>
      <bbk:Obs TIME_PERIOD="2021-01" OBS_VALUE="-0.64" BBK_DIFF="1.6" BBK_DIFF_Y="-23.1"/>
      <bbk:Obs TIME_PERIOD="2020-12" OBS_VALUE="-0.65" BBK_DIFF="4.3" BBK_DIFF_Y="-106.7"/>
      <bbk:Obs TIME_PERIOD="2020-11" OBS_VALUE="-0.67" BBK_DIFF="7.3" BBK_DIFF_Y="-44.3"/>
      <bbk:Obs TIME_PERIOD="2020-10" OBS_VALUE="-0.73" BBK_DIFF="-12.4" BBK_DIFF_Y="-41.4"/>
      <bbk:Obs TIME_PERIOD="2020-09" OBS_VALUE="-0.65" BBK_DIFF="-27.6" BBK_DIFF_Y="2.0"/>
      <bbk:Obs TIME_PERIOD="2020-08" OBS_VALUE="-0.51" BBK_DIFF="22.7" BBK_DIFF_Y="36.9"/>
      <bbk:Obs TIME_PERIOD="2020-07" OBS_VALUE="-0.66" BBK_DIFF="-11.0" BBK_DIFF_Y="-18.8"/>
      <bbk:Obs TIME_PERIOD="2020-06" OBS_VALUE="-0.59" BBK_DIFF="-18.0" BBK_DIFF_Y="-32.2"/>
      <bbk:Obs TIME_PERIOD="2020-05" OBS_VALUE="-0.5" BBK_DIFF="14.4" BBK_DIFF_Y="-40.3"/>
      <bbk:Obs TIME_PERIOD="2020-04" OBS_VALUE="-0.59" BBK_DIFF="-4.8" BBK_DIFF_Y="-323.9"/>
      <bbk:Obs TIME_PERIOD="2020-03" OBS_VALUE="-0.56" BBK_DIFF="18.5" BBK_DIFF_Y="-151.4"/>
      <bbk:Obs TIME_PERIOD="2020-02" OBS_VALUE="-0.69" BBK_DIFF="-32.8" BBK_DIFF_Y="-2640.0"/>
      <bbk:Obs TIME_PERIOD="2020-01" OBS_VALUE="-0.52" BBK_DIFF="-65.4" BBK_DIFF_Y="-1811.1"/>
      <bbk:Obs TIME_PERIOD="2019-12" OBS_VALUE="-0.31" BBK_DIFF="33.2" BBK_DIFF_Y="-657.1"/>
      <bbk:Obs TIME_PERIOD="2019-11" OBS_VALUE="-0.47" BBK_DIFF="9.1" BBK_DIFF_Y="-462.0"/>
      <bbk:Obs TIME_PERIOD="2019-10" OBS_VALUE="-0.51" BBK_DIFF="22.1" BBK_DIFF_Y="-360.9"/>
      <bbk:Obs TIME_PERIOD="2019-09" OBS_VALUE="-0.66" BBK_DIFF="17.9" BBK_DIFF_Y="-320.7"/>
      <bbk:Obs TIME_PERIOD="2019-08" OBS_VALUE="-0.8" BBK_DIFF="-45.7" BBK_DIFF_Y="-650.7"/>
      <bbk:Obs TIME_PERIOD="2019-07" OBS_VALUE="-0.55" BBK_DIFF="-23.5" BBK_DIFF_Y="-355.6"/>
      <bbk:Obs TIME_PERIOD="2019-06" OBS_VALUE="-0.45" BBK_DIFF="-25.2" BBK_DIFF_Y="-375.9"/>
      <bbk:Obs TIME_PERIOD="2019-05" OBS_VALUE="-0.36" BBK_DIFF="-158.7" BBK_DIFF_Y="-261.5"/>
      <bbk:Obs TIME_PERIOD="2019-04" OBS_VALUE="-0.14" BBK_DIFF="37.8" BBK_DIFF_Y="-135.8"/>
      <bbk:Obs TIME_PERIOD="2019-03" OBS_VALUE="-0.22" BBK_DIFF="-788.0" BBK_DIFF_Y="-169.6"/>
      <bbk:Obs TIME_PERIOD="2019-02" OBS_VALUE="-0.03" BBK_DIFF="7.4" BBK_DIFF_Y="-105.2"/>
      <bbk:Obs TIME_PERIOD="2019-01" OBS_VALUE="-0.03" BBK_DIFF="-148.2" BBK_DIFF_Y="-105.7"/>
      <bbk:Obs TIME_PERIOD="2018-12" OBS_VALUE="0.06" BBK_DIFF="-56.6" BBK_DIFF_Y="-77.8"/>
      <bbk:Obs TIME_PERIOD="2018-11" OBS_VALUE="0.13" BBK_DIFF="-34.5" BBK_DIFF_Y="-23.7"/>
      <bbk:Obs TIME_PERIOD="2018-10" OBS_VALUE="0.2" BBK_DIFF="-34.1" BBK_DIFF_Y="45.9"/>
      <bbk:Obs TIME_PERIOD="2018-09" OBS_VALUE="0.3" BBK_DIFF="104.8" BBK_DIFF_Y="52.6"/>
      <bbk:Obs TIME_PERIOD="2018-08" OBS_VALUE="0.15" BBK_DIFF="-32.4" BBK_DIFF_Y="47.5"/>
      <bbk:Obs TIME_PERIOD="2018-07" OBS_VALUE="0.22" BBK_DIFF="33.3" BBK_DIFF_Y="-21.5"/>
      <bbk:Obs TIME_PERIOD="2018-06" OBS_VALUE="0.16" BBK_DIFF="-26.7" BBK_DIFF_Y="-28.6"/>
      <bbk:Obs TIME_PERIOD="2018-05" OBS_VALUE="0.22" BBK_DIFF="-42.6" BBK_DIFF_Y="245.3"/>
      <bbk:Obs TIME_PERIOD="2018-04" OBS_VALUE="0.39" BBK_DIFF="20.7" BBK_DIFF_Y="347.7"/>
      <bbk:Obs TIME_PERIOD="2018-03" OBS_VALUE="0.32" BBK_DIFF="-33.7" BBK_DIFF_Y="319.7"/>
      <bbk:Obs TIME_PERIOD="2018-02" OBS_VALUE="0.48" BBK_DIFF="1.7" BBK_DIFF_Y="628.6"/>
      <bbk:Obs TIME_PERIOD="2018-01" OBS_VALUE="0.47" BBK_DIFF="87.7" BBK_DIFF_Y="143.8"/>
      <bbk:Obs TIME_PERIOD="2017-12" OBS_VALUE="0.25" BBK_DIFF="49.1" BBK_DIFF_Y="863.6"/>
      <bbk:Obs TIME_PERIOD="2017-11" OBS_VALUE="0.17" BBK_DIFF="25.2" BBK_DIFF_Y="569.4"/>
      <bbk:Obs TIME_PERIOD="2017-10" OBS_VALUE="0.14" BBK_DIFF="-31.1" BBK_DIFF_Y="284.9"/>
      <bbk:Obs TIME_PERIOD="2017-09" OBS_VALUE="0.2" BBK_DIFF="98.0" BBK_DIFF_Y="151.7"/>
      <bbk:Obs TIME_PERIOD="2017-08" OBS_VALUE="0.1" BBK_DIFF="-64.0" BBK_DIFF_Y="131.1"/>
      <bbk:Obs TIME_PERIOD="2017-07" OBS_VALUE="0.28" BBK_DIFF="21.1" BBK_DIFF_Y="190.8"/>
      <bbk:Obs TIME_PERIOD="2017-06" OBS_VALUE="0.23" BBK_DIFF="254.7" BBK_DIFF_Y="176.7"/>
      <bbk:Obs TIME_PERIOD="2017-05" OBS_VALUE="0.06" BBK_DIFF="-25.6" BBK_DIFF_Y="245.5"/>
      <bbk:Obs TIME_PERIOD="2017-04" OBS_VALUE="0.09" BBK_DIFF="13.2" BBK_DIFF_Y="290.9"/>
      <bbk:Obs TIME_PERIOD="2017-03" OBS_VALUE="0.08" BBK_DIFF="183.5" BBK_DIFF_Y="211.8"/>
      <bbk:Obs TIME_PERIOD="2017-02" OBS_VALUE="-0.09" BBK_DIFF="-146.9" BBK_DIFF_Y="15.7"/>
      <bbk:Obs TIME_PERIOD="2017-01" OBS_VALUE="0.19" BBK_DIFF="687.9" BBK_DIFF_Y="94.0"/>
      <bbk:Obs TIME_PERIOD="2016-12" OBS_VALUE="-0.03" BBK_DIFF="8.3" BBK_DIFF_Y="-107.8"/>
      <bbk:Obs TIME_PERIOD="2016-11" OBS_VALUE="-0.04" BBK_DIFF="50.7" BBK_DIFF_Y="-116.4"/>
      <bbk:Obs TIME_PERIOD="2016-10" OBS_VALUE="-0.07" BBK_DIFF="80.7" BBK_DIFF_Y="-126.9"/>
      <bbk:Obs TIME_PERIOD="2016-09" OBS_VALUE="-0.38" BBK_DIFF="-19.2" BBK_DIFF_Y="-204.1"/>
      <bbk:Obs TIME_PERIOD="2016-08" OBS_VALUE="-0.32" BBK_DIFF="-5.0" BBK_DIFF_Y="-168.4"/>
      <bbk:Obs TIME_PERIOD="2016-07" OBS_VALUE="-0.3" BBK_DIFF="-2.4" BBK_DIFF_Y="-171.3"/>
      <bbk:Obs TIME_PERIOD="2016-06" OBS_VALUE="-0.3" BBK_DIFF="-572.7" BBK_DIFF_Y="-151.3"/>
      <bbk:Obs TIME_PERIOD="2016-05" OBS_VALUE="-0.04" BBK_DIFF="-300.0" BBK_DIFF_Y="-112.7"/>
      <bbk:Obs TIME_PERIOD="2016-04" OBS_VALUE="0.02" BBK_DIFF="132.4" BBK_DIFF_Y="-90.0"/>
      <bbk:Obs TIME_PERIOD="2016-03" OBS_VALUE="-0.07" BBK_DIFF="37.0" BBK_DIFF_Y="-172.3"/>
      <bbk:Obs TIME_PERIOD="2016-02" OBS_VALUE="-0.11" BBK_DIFF="-208.0" BBK_DIFF_Y="-176.1"/>
      <bbk:Obs TIME_PERIOD="2016-01" OBS_VALUE="0.1" BBK_DIFF="-76.3" BBK_DIFF_Y="-43.5"/>
      <bbk:Obs TIME_PERIOD="2015-12" OBS_VALUE="0.42" BBK_DIFF="91.8" BBK_DIFF_Y="16.3"/>
      <bbk:Obs TIME_PERIOD="2015-11" OBS_VALUE="0.22" BBK_DIFF="-18.8" BBK_DIFF_Y="-54.5"/>
      <bbk:Obs TIME_PERIOD="2015-10" OBS_VALUE="0.27" BBK_DIFF="-25.5" BBK_DIFF_Y="-55.1"/>
      <bbk:Obs TIME_PERIOD="2015-09" OBS_VALUE="0.36" BBK_DIFF="-21.7" BBK_DIFF_Y="-45.6"/>
      <bbk:Obs TIME_PERIOD="2015-08" OBS_VALUE="0.47" BBK_DIFF="9.4" BBK_DIFF_Y="-29.8"/>
      <bbk:Obs TIME_PERIOD="2015-07" OBS_VALUE="0.43" BBK_DIFF="-26.3" BBK_DIFF_Y="-51.3"/>
      <bbk:Obs TIME_PERIOD="2015-06" OBS_VALUE="0.58" BBK_DIFF="66.3" BBK_DIFF_Y="-39.3"/>
      <bbk:Obs TIME_PERIOD="2015-05" OBS_VALUE="0.35" BBK_DIFF="58.4" BBK_DIFF_Y="-66.7"/>
      <bbk:Obs TIME_PERIOD="2015-04" OBS_VALUE="0.22" BBK_DIFF="133.0" BBK_DIFF_Y="-82.2"/>
      <bbk:Obs TIME_PERIOD="2015-03" OBS_VALUE="0.09" BBK_DIFF="-33.8" BBK_DIFF_Y="-92.5"/>
      <bbk:Obs TIME_PERIOD="2015-02" OBS_VALUE="0.14" BBK_DIFF="-19.8" BBK_DIFF_Y="-88.9"/>
      <bbk:Obs TIME_PERIOD="2015-01" OBS_VALUE="0.18" BBK_DIFF="-51.2" BBK_DIFF_Y="-86.6"/>
      <bbk:Obs TIME_PERIOD="2014-12" OBS_VALUE="0.36" BBK_DIFF="-25.0" BBK_DIFF_Y="-78.7"/>
      <bbk:Obs TIME_PERIOD="2014-11" OBS_VALUE="0.48" BBK_DIFF="-19.9" BBK_DIFF_Y="-65.1"/>
      <bbk:Obs TIME_PERIOD="2014-10" OBS_VALUE="0.6" BBK_DIFF="-9.7" BBK_DIFF_Y="-54.9"/>
      <bbk:Obs TIME_PERIOD="2014-09" OBS_VALUE="0.67" BBK_DIFF="1.1" BBK_DIFF_Y="-52.1"/>
      <bbk:Obs TIME_PERIOD="2014-08" OBS_VALUE="0.66" BBK_DIFF="-24.2" BBK_DIFF_Y="-57.2"/>
      <bbk:Obs TIME_PERIOD="2014-07" OBS_VALUE="0.87" BBK_DIFF="-8.1" BBK_DIFF_Y="-36.6"/>
      <bbk:Obs TIME_PERIOD="2014-06" OBS_VALUE="0.95" BBK_DIFF="-8.7" BBK_DIFF_Y="-31.6"/>
      <bbk:Obs TIME_PERIOD="2014-05" OBS_VALUE="1.04" BBK_DIFF="-15.3" BBK_DIFF_Y="-7.8"/>
      <bbk:Obs TIME_PERIOD="2014-04" OBS_VALUE="1.23" BBK_DIFF="-2.1" BBK_DIFF_Y="35.2"/>
      <bbk:Obs TIME_PERIOD="2014-03" OBS_VALUE="1.26" BBK_DIFF="-1.4" BBK_DIFF_Y="34.9"/>
      <bbk:Obs TIME_PERIOD="2014-02" OBS_VALUE="1.27" BBK_DIFF="-3.3" BBK_DIFF_Y="12.8"/>
      <bbk:Obs TIME_PERIOD="2014-01" OBS_VALUE="1.32" BBK_DIFF="-22.6" BBK_DIFF_Y="-0.6"/>
      <bbk:Obs TIME_PERIOD="2013-12" OBS_VALUE="1.7" BBK_DIFF="22.6" BBK_DIFF_Y="68.6"/>
      <bbk:Obs TIME_PERIOD="2013-11" OBS_VALUE="1.39" BBK_DIFF="3.7" BBK_DIFF_Y="27.9"/>
      <bbk:Obs TIME_PERIOD="2013-10" OBS_VALUE="1.34" BBK_DIFF="-4.2" BBK_DIFF_Y="10.2"/>
      <bbk:Obs TIME_PERIOD="2013-09" OBS_VALUE="1.4" BBK_DIFF="-9.8" BBK_DIFF_Y="19.7"/>
      <bbk:Obs TIME_PERIOD="2013-08" OBS_VALUE="1.55" BBK_DIFF="12.3" BBK_DIFF_Y="42.4"/>
      <bbk:Obs TIME_PERIOD="2013-07" OBS_VALUE="1.38" BBK_DIFF="-0.8" BBK_DIFF_Y="29.8"/>
      <bbk:Obs TIME_PERIOD="2013-06" OBS_VALUE="1.39" BBK_DIFF="23.0" BBK_DIFF_Y="3.3"/>
      <bbk:Obs TIME_PERIOD="2013-05" OBS_VALUE="1.13" BBK_DIFF="24.2" BBK_DIFF_Y="9.1"/>
      <bbk:Obs TIME_PERIOD="2013-04" OBS_VALUE="0.91" BBK_DIFF="-2.4" BBK_DIFF_Y="-34.5"/>
      <bbk:Obs TIME_PERIOD="2013-03" OBS_VALUE="0.93" BBK_DIFF="-17.5" BBK_DIFF_Y="-41.4"/>
      <bbk:Obs TIME_PERIOD="2013-02" OBS_VALUE="1.13" BBK_DIFF="-14.8" BBK_DIFF_Y="-28.0"/>
      <bbk:Obs TIME_PERIOD="2013-01" OBS_VALUE="1.33" BBK_DIFF="31.3" BBK_DIFF_Y="-16.1"/>
      <bbk:Obs TIME_PERIOD="2012-12" OBS_VALUE="1.01" BBK_DIFF="-7.0" BBK_DIFF_Y="-37.0"/>
      <bbk:Obs TIME_PERIOD="2012-11" OBS_VALUE="1.09" BBK_DIFF="-10.7" BBK_DIFF_Y="-48.3"/>
      <bbk:Obs TIME_PERIOD="2012-10" OBS_VALUE="1.22" BBK_DIFF="4.1" BBK_DIFF_Y="-37.5"/>
      <bbk:Obs TIME_PERIOD="2012-09" OBS_VALUE="1.17" BBK_DIFF="7.4" BBK_DIFF_Y="-35.4"/>
      <bbk:Obs TIME_PERIOD="2012-08" OBS_VALUE="1.09" BBK_DIFF="2.4" BBK_DIFF_Y="-45.9"/>
      <bbk:Obs TIME_PERIOD="2012-07" OBS_VALUE="1.06" BBK_DIFF="-21.0" BBK_DIFF_Y="-56.9"/>
      <bbk:Obs TIME_PERIOD="2012-06" OBS_VALUE="1.35" BBK_DIFF="30.0" BBK_DIFF_Y="-52.8"/>
      <bbk:Obs TIME_PERIOD="2012-05" OBS_VALUE="1.03" BBK_DIFF="-25.4" BBK_DIFF_Y="-64.7"/>
      <bbk:Obs TIME_PERIOD="2012-04" OBS_VALUE="1.39" BBK_DIFF="-12.8" BBK_DIFF_Y="-56.6"/>
      <bbk:Obs TIME_PERIOD="2012-03" OBS_VALUE="1.59" BBK_DIFF="1.3" BBK_DIFF_Y="-51.6"/>
      <bbk:Obs TIME_PERIOD="2012-02" OBS_VALUE="1.57" BBK_DIFF="-0.6" BBK_DIFF_Y="-48.3"/>
      <bbk:Obs TIME_PERIOD="2012-01" OBS_VALUE="1.58" BBK_DIFF="-1.4" BBK_DIFF_Y="-48.8"/>
      <bbk:Obs TIME_PERIOD="2011-12" OBS_VALUE="1.6" BBK_DIFF="-23.7" BBK_DIFF_Y="-43.4"/>
      <bbk:Obs TIME_PERIOD="2011-11" OBS_VALUE="2.1" BBK_DIFF="8.0" BBK_DIFF_Y="-18.2"/>
      <bbk:Obs TIME_PERIOD="2011-10" OBS_VALUE="1.94" BBK_DIFF="7.6" BBK_DIFF_Y="-19.9"/>
      <bbk:Obs TIME_PERIOD="2011-09" OBS_VALUE="1.81" BBK_DIFF="-10.1" BBK_DIFF_Y="-14.1"/>
      <bbk:Obs TIME_PERIOD="2011-08" OBS_VALUE="2.01" BBK_DIFF="-18.4" BBK_DIFF_Y="2.4"/>
      <bbk:Obs TIME_PERIOD="2011-07" OBS_VALUE="2.46" BBK_DIFF="-13.5" BBK_DIFF_Y="-3.6"/>
      <bbk:Obs TIME_PERIOD="2011-06" OBS_VALUE="2.85" BBK_DIFF="-2.9" BBK_DIFF_Y="17.9"/>
      <bbk:Obs TIME_PERIOD="2011-05" OBS_VALUE="2.93" BBK_DIFF="-8.3" BBK_DIFF_Y="17.4"/>
      <bbk:Obs TIME_PERIOD="2011-04" OBS_VALUE="3.2" BBK_DIFF="-2.6" BBK_DIFF_Y="10.0"/>
      <bbk:Obs TIME_PERIOD="2011-03" OBS_VALUE="3.28" BBK_DIFF="8.2" BBK_DIFF_Y="9.2"/>
      <bbk:Obs TIME_PERIOD="2011-02" OBS_VALUE="3.03" BBK_DIFF="-1.6" BBK_DIFF_Y="0.8"/>
      <bbk:Obs TIME_PERIOD="2011-01" OBS_VALUE="3.08" BBK_DIFF="9.0" BBK_DIFF_Y="-0.5"/>
      <bbk:Obs TIME_PERIOD="2010-12" OBS_VALUE="2.83" BBK_DIFF="10.2" BBK_DIFF_Y="-13.7"/>
      <bbk:Obs TIME_PERIOD="2010-11" OBS_VALUE="2.57" BBK_DIFF="5.8" BBK_DIFF_Y="-15.8"/>
      <bbk:Obs TIME_PERIOD="2010-10" OBS_VALUE="2.43" BBK_DIFF="15.4" BBK_DIFF_Y="-25.3"/>
      <bbk:Obs TIME_PERIOD="2010-09" OBS_VALUE="2.1" BBK_DIFF="7.1" BBK_DIFF_Y="-34.1"/>
      <bbk:Obs TIME_PERIOD="2010-08" OBS_VALUE="1.96" BBK_DIFF="-23.2" BBK_DIFF_Y="-38.7"/>
      <bbk:Obs TIME_PERIOD="2010-07" OBS_VALUE="2.56" BBK_DIFF="5.8" BBK_DIFF_Y="-23.2"/>
      <bbk:Obs TIME_PERIOD="2010-06" OBS_VALUE="2.42" BBK_DIFF="-3.4" BBK_DIFF_Y="-28.5"/>
      <bbk:Obs TIME_PERIOD="2010-05" OBS_VALUE="2.5" BBK_DIFF="-14.0" BBK_DIFF_Y="-29.7"/>
      <bbk:Obs TIME_PERIOD="2010-04" OBS_VALUE="2.91" BBK_DIFF="-3.3" BBK_DIFF_Y="-10.2"/>
      <bbk:Obs TIME_PERIOD="2010-03" OBS_VALUE="3.01" BBK_DIFF="-0.1" BBK_DIFF_Y="-1.4"/>
      <bbk:Obs TIME_PERIOD="2010-02" OBS_VALUE="3.01" BBK_DIFF="-2.8" BBK_DIFF_Y="-3.1"/>
      <bbk:Obs TIME_PERIOD="2010-01" OBS_VALUE="3.1" BBK_DIFF="-5.5" BBK_DIFF_Y="-6.3"/>
      <bbk:Obs TIME_PERIOD="2009-12" OBS_VALUE="3.27" BBK_DIFF="7.5" BBK_DIFF_Y="9.2"/>
      <bbk:Obs TIME_PERIOD="2009-11" OBS_VALUE="3.05" BBK_DIFF="-6.2" BBK_DIFF_Y="-6.1"/>
      <bbk:Obs TIME_PERIOD="2009-10" OBS_VALUE="3.25" BBK_DIFF="1.7" BBK_DIFF_Y="-14.7"/>
      <bbk:Obs TIME_PERIOD="2009-09" OBS_VALUE="3.19" BBK_DIFF="-0.3" BBK_DIFF_Y="-21.5"/>
      <bbk:Obs TIME_PERIOD="2009-08" OBS_VALUE="3.2" BBK_DIFF="-3.8" BBK_DIFF_Y="-22.9"/>
      <bbk:Obs TIME_PERIOD="2009-07" OBS_VALUE="3.33" BBK_DIFF="-1.6" BBK_DIFF_Y="-25.6"/>
      <bbk:Obs TIME_PERIOD="2009-06" OBS_VALUE="3.38" BBK_DIFF="-5.0" BBK_DIFF_Y="-27.3"/>
      <bbk:Obs TIME_PERIOD="2009-05" OBS_VALUE="3.56" BBK_DIFF="9.9" BBK_DIFF_Y="-20.0"/>
      <bbk:Obs TIME_PERIOD="2009-04" OBS_VALUE="3.24" BBK_DIFF="6.1" BBK_DIFF_Y="-23.0"/>
      <bbk:Obs TIME_PERIOD="2009-03" OBS_VALUE="3.05" BBK_DIFF="-1.7" BBK_DIFF_Y="-22.9"/>
      <bbk:Obs TIME_PERIOD="2009-02" OBS_VALUE="3.1" BBK_DIFF="-6.0" BBK_DIFF_Y="-20.1"/>
      <bbk:Obs TIME_PERIOD="2009-01" OBS_VALUE="3.3" BBK_DIFF="10.2" BBK_DIFF_Y="-15.9"/>
      <bbk:Obs TIME_PERIOD="2008-12" OBS_VALUE="3.0" BBK_DIFF="-7.6" BBK_DIFF_Y="-31.2"/>
      <bbk:Obs TIME_PERIOD="2008-11" OBS_VALUE="3.25" BBK_DIFF="-14.7" BBK_DIFF_Y="-20.7"/>
      <bbk:Obs TIME_PERIOD="2008-10" OBS_VALUE="3.81" BBK_DIFF="-6.3" BBK_DIFF_Y="-9.8"/>
      <bbk:Obs TIME_PERIOD="2008-09" OBS_VALUE="4.06" BBK_DIFF="-2.1" BBK_DIFF_Y="-6.6"/>
      <bbk:Obs TIME_PERIOD="2008-08" OBS_VALUE="4.15" BBK_DIFF="-7.1" BBK_DIFF_Y="-3.2"/>
      <bbk:Obs TIME_PERIOD="2008-07" OBS_VALUE="4.47" BBK_DIFF="-3.8" BBK_DIFF_Y="2.1"/>
      <bbk:Obs TIME_PERIOD="2008-06" OBS_VALUE="4.64" BBK_DIFF="4.5" BBK_DIFF_Y="1.6"/>
      <bbk:Obs TIME_PERIOD="2008-05" OBS_VALUE="4.45" BBK_DIFF="5.9" BBK_DIFF_Y="0.7"/>
      <bbk:Obs TIME_PERIOD="2008-04" OBS_VALUE="4.2" BBK_DIFF="6.1" BBK_DIFF_Y="-0.8"/>
      <bbk:Obs TIME_PERIOD="2008-03" OBS_VALUE="3.96" BBK_DIFF="1.9" BBK_DIFF_Y="-2.5"/>
      <bbk:Obs TIME_PERIOD="2008-02" OBS_VALUE="3.88" BBK_DIFF="-1.1" BBK_DIFF_Y="-2.1"/>
      <bbk:Obs TIME_PERIOD="2008-01" OBS_VALUE="3.93" BBK_DIFF="-9.9" BBK_DIFF_Y="-4.5"/>
      <bbk:Obs TIME_PERIOD="2007-12" OBS_VALUE="4.36" BBK_DIFF="6.5" BBK_DIFF_Y="10.0"/>
      <bbk:Obs TIME_PERIOD="2007-11" OBS_VALUE="4.09" BBK_DIFF="-3.1" BBK_DIFF_Y="9.9"/>
      <bbk:Obs TIME_PERIOD="2007-10" OBS_VALUE="4.22" BBK_DIFF="-3.0" BBK_DIFF_Y="11.1"/>
      <bbk:Obs TIME_PERIOD="2007-09" OBS_VALUE="4.35" BBK_DIFF="1.5" BBK_DIFF_Y="18.4"/>
      <bbk:Obs TIME_PERIOD="2007-08" OBS_VALUE="4.29" BBK_DIFF="-2.1" BBK_DIFF_Y="13.3"/>
      <bbk:Obs TIME_PERIOD="2007-07" OBS_VALUE="4.38" BBK_DIFF="-4.2" BBK_DIFF_Y="12.0"/>
      <bbk:Obs TIME_PERIOD="2007-06" OBS_VALUE="4.57" BBK_DIFF="3.5" BBK_DIFF_Y="12.1"/>
      <bbk:Obs TIME_PERIOD="2007-05" OBS_VALUE="4.42" BBK_DIFF="4.3" BBK_DIFF_Y="12.7"/>
      <bbk:Obs TIME_PERIOD="2007-04" OBS_VALUE="4.23" BBK_DIFF="4.3" BBK_DIFF_Y="6.1"/>
      <bbk:Obs TIME_PERIOD="2007-03" OBS_VALUE="4.06" BBK_DIFF="2.2" BBK_DIFF_Y="8.0"/>
      <bbk:Obs TIME_PERIOD="2007-02" OBS_VALUE="3.97" BBK_DIFF="-3.4" BBK_DIFF_Y="13.8"/>
      <bbk:Obs TIME_PERIOD="2007-01" OBS_VALUE="4.11" BBK_DIFF="3.7" BBK_DIFF_Y="18.7"/>
      <bbk:Obs TIME_PERIOD="2006-12" OBS_VALUE="3.96" BBK_DIFF="6.4" BBK_DIFF_Y="21.9"/>
      <bbk:Obs TIME_PERIOD="2006-11" OBS_VALUE="3.72" BBK_DIFF="-2.0" BBK_DIFF_Y="10.8"/>
      <bbk:Obs TIME_PERIOD="2006-10" OBS_VALUE="3.8" BBK_DIFF="3.4" BBK_DIFF_Y="13.4"/>
      <bbk:Obs TIME_PERIOD="2006-09" OBS_VALUE="3.68" BBK_DIFF="-2.9" BBK_DIFF_Y="18.6"/>
      <bbk:Obs TIME_PERIOD="2006-08" OBS_VALUE="3.78" BBK_DIFF="-3.2" BBK_DIFF_Y="25.3"/>
      <bbk:Obs TIME_PERIOD="2006-07" OBS_VALUE="3.91" BBK_DIFF="-4.1" BBK_DIFF_Y="27.1"/>
      <bbk:Obs TIME_PERIOD="2006-06" OBS_VALUE="4.08" BBK_DIFF="4.0" BBK_DIFF_Y="34.9"/>
      <bbk:Obs TIME_PERIOD="2006-05" OBS_VALUE="3.92" BBK_DIFF="-1.8" BBK_DIFF_Y="24.6"/>
      <bbk:Obs TIME_PERIOD="2006-04" OBS_VALUE="3.99" BBK_DIFF="6.2" BBK_DIFF_Y="21.1"/>
      <bbk:Obs TIME_PERIOD="2006-03" OBS_VALUE="3.76" BBK_DIFF="7.7" BBK_DIFF_Y="5.1"/>
      <bbk:Obs TIME_PERIOD="2006-02" OBS_VALUE="3.49" BBK_DIFF="0.8" BBK_DIFF_Y="-2.8"/>
      <bbk:Obs TIME_PERIOD="2006-01" OBS_VALUE="3.46" BBK_DIFF="6.6" BBK_DIFF_Y="0.7"/>
      <bbk:Obs TIME_PERIOD="2005-12" OBS_VALUE="3.25" BBK_DIFF="-3.3" BBK_DIFF_Y="-9.1"/>
      <bbk:Obs TIME_PERIOD="2005-11" OBS_VALUE="3.36" BBK_DIFF="0.3" BBK_DIFF_Y="-7.7"/>
      <bbk:Obs TIME_PERIOD="2005-10" OBS_VALUE="3.35" BBK_DIFF="8.1" BBK_DIFF_Y="-10.9"/>
      <bbk:Obs TIME_PERIOD="2005-09" OBS_VALUE="3.1" BBK_DIFF="2.7" BBK_DIFF_Y="-20.2"/>
      <bbk:Obs TIME_PERIOD="2005-08" OBS_VALUE="3.02" BBK_DIFF="-1.9" BBK_DIFF_Y="-23.8"/>
      <bbk:Obs TIME_PERIOD="2005-07" OBS_VALUE="3.08" BBK_DIFF="1.8" BBK_DIFF_Y="-25.8"/>
      <bbk:Obs TIME_PERIOD="2005-06" OBS_VALUE="3.02" BBK_DIFF="-3.9" BBK_DIFF_Y="-28.8"/>
      <bbk:Obs TIME_PERIOD="2005-05" OBS_VALUE="3.14" BBK_DIFF="-4.6" BBK_DIFF_Y="-25.4"/>
      <bbk:Obs TIME_PERIOD="2005-04" OBS_VALUE="3.3" BBK_DIFF="-7.8" BBK_DIFF_Y="-20.0"/>
      <bbk:Obs TIME_PERIOD="2005-03" OBS_VALUE="3.58" BBK_DIFF="-0.4" BBK_DIFF_Y="-7.5"/>
      <bbk:Obs TIME_PERIOD="2005-02" OBS_VALUE="3.59" BBK_DIFF="4.4" BBK_DIFF_Y="-8.9"/>
      <bbk:Obs TIME_PERIOD="2005-01" OBS_VALUE="3.44" BBK_DIFF="-3.8" BBK_DIFF_Y="-18.2"/>
      <bbk:Obs TIME_PERIOD="2004-12" OBS_VALUE="3.57" BBK_DIFF="-1.8" BBK_DIFF_Y="-15.3"/>
      <bbk:Obs TIME_PERIOD="2004-11" OBS_VALUE="3.64" BBK_DIFF="-3.1" BBK_DIFF_Y="-16.6"/>
      <bbk:Obs TIME_PERIOD="2004-10" OBS_VALUE="3.76" BBK_DIFF="-3.2" BBK_DIFF_Y="-11.9"/>
      <bbk:Obs TIME_PERIOD="2004-09" OBS_VALUE="3.88" BBK_DIFF="-2.0" BBK_DIFF_Y="-1.7"/>
      <bbk:Obs TIME_PERIOD="2004-08" OBS_VALUE="3.96" BBK_DIFF="-4.4" BBK_DIFF_Y="-3.0"/>
      <bbk:Obs TIME_PERIOD="2004-07" OBS_VALUE="4.14" BBK_DIFF="-2.3" BBK_DIFF_Y="5.1"/>
      <bbk:Obs TIME_PERIOD="2004-06" OBS_VALUE="4.24" BBK_DIFF="0.7" BBK_DIFF_Y="12.9"/>
      <bbk:Obs TIME_PERIOD="2004-05" OBS_VALUE="4.21" BBK_DIFF="2.3" BBK_DIFF_Y="17.8"/>
      <bbk:Obs TIME_PERIOD="2004-04" OBS_VALUE="4.12" BBK_DIFF="6.6" BBK_DIFF_Y="1.7"/>
      <bbk:Obs TIME_PERIOD="2004-03" OBS_VALUE="3.86" BBK_DIFF="-2.0" BBK_DIFF_Y="-2.2"/>
      <bbk:Obs TIME_PERIOD="2004-02" OBS_VALUE="3.94" BBK_DIFF="-6.2" BBK_DIFF_Y="2.7"/>
      <bbk:Obs TIME_PERIOD="2004-01" OBS_VALUE="4.2" BBK_DIFF="-0.4" BBK_DIFF_Y="6.5"/>
      <bbk:Obs TIME_PERIOD="2003-12" OBS_VALUE="4.22" BBK_DIFF="-3.4" BBK_DIFF_Y="1.9"/>
      <bbk:Obs TIME_PERIOD="2003-11" OBS_VALUE="4.37" BBK_DIFF="2.3" BBK_DIFF_Y="-2.5"/>
      <bbk:Obs TIME_PERIOD="2003-10" OBS_VALUE="4.27" BBK_DIFF="8.0" BBK_DIFF_Y="-4.2"/>
      <bbk:Obs TIME_PERIOD="2003-09" OBS_VALUE="3.95" BBK_DIFF="-3.3" BBK_DIFF_Y="-7.3"/>
      <bbk:Obs TIME_PERIOD="2003-08" OBS_VALUE="4.09" BBK_DIFF="3.6" BBK_DIFF_Y="-9.6"/>
      <bbk:Obs TIME_PERIOD="2003-07" OBS_VALUE="3.95" BBK_DIFF="5.0" BBK_DIFF_Y="-17.8"/>
      <bbk:Obs TIME_PERIOD="2003-06" OBS_VALUE="3.76" BBK_DIFF="5.1" BBK_DIFF_Y="-23.7"/>
      <bbk:Obs TIME_PERIOD="2003-05" OBS_VALUE="3.58" BBK_DIFF="-11.7" BBK_DIFF_Y="-30.2"/>
      <bbk:Obs TIME_PERIOD="2003-04" OBS_VALUE="4.05" BBK_DIFF="2.5" BBK_DIFF_Y="-20.5"/>
      <bbk:Obs TIME_PERIOD="2003-03" OBS_VALUE="3.95" BBK_DIFF="2.9" BBK_DIFF_Y="-24.5"/>
      <bbk:Obs TIME_PERIOD="2003-02" OBS_VALUE="3.84" BBK_DIFF="-2.7" BBK_DIFF_Y="-22.0"/>
      <bbk:Obs TIME_PERIOD="2003-01" OBS_VALUE="3.94" BBK_DIFF="-4.7" BBK_DIFF_Y="-20.4"/>
      <bbk:Obs TIME_PERIOD="2002-12" OBS_VALUE="4.14" BBK_DIFF="-7.5" BBK_DIFF_Y="-16.3"/>
      <bbk:Obs TIME_PERIOD="2002-11" OBS_VALUE="4.48" BBK_DIFF="0.5" BBK_DIFF_Y="-2.4"/>
      <bbk:Obs TIME_PERIOD="2002-10" OBS_VALUE="4.46" BBK_DIFF="4.6" BBK_DIFF_Y="1.7"/>
      <bbk:Obs TIME_PERIOD="2002-09" OBS_VALUE="4.26" BBK_DIFF="-5.8" BBK_DIFF_Y="-9.8"/>
      <bbk:Obs TIME_PERIOD="2002-08" OBS_VALUE="4.52" BBK_DIFF="-5.8" BBK_DIFF_Y="-4.8"/>
      <bbk:Obs TIME_PERIOD="2002-07" OBS_VALUE="4.8" BBK_DIFF="-2.7" BBK_DIFF_Y="-1.6"/>
      <bbk:Obs TIME_PERIOD="2002-06" OBS_VALUE="4.93" BBK_DIFF="-3.8" BBK_DIFF_Y="-1.7"/>
      <bbk:Obs TIME_PERIOD="2002-05" OBS_VALUE="5.13" BBK_DIFF="0.5" BBK_DIFF_Y="-0.7"/>
      <bbk:Obs TIME_PERIOD="2002-04" OBS_VALUE="5.1" BBK_DIFF="-2.5" BBK_DIFF_Y="1.7"/>
      <bbk:Obs TIME_PERIOD="2002-03" OBS_VALUE="5.23" BBK_DIFF="6.3" BBK_DIFF_Y="12.2"/>
      <bbk:Obs TIME_PERIOD="2002-02" OBS_VALUE="4.92" BBK_DIFF="-0.7" BBK_DIFF_Y="4.7"/>
      <bbk:Obs TIME_PERIOD="2002-01" OBS_VALUE="4.96" BBK_DIFF="0.3" BBK_DIFF_Y="4.0"/>
      <bbk:Obs TIME_PERIOD="2001-12" OBS_VALUE="4.94" BBK_DIFF="7.8" BBK_DIFF_Y="2.0"/>
      <bbk:Obs TIME_PERIOD="2001-11" OBS_VALUE="4.59" BBK_DIFF="4.7" BBK_DIFF_Y="-9.1"/>
      <bbk:Obs TIME_PERIOD="2001-10" OBS_VALUE="4.38" BBK_DIFF="-7.3" BBK_DIFF_Y="-16.5"/>
      <bbk:Obs TIME_PERIOD="2001-09" OBS_VALUE="4.72" BBK_DIFF="-0.5" BBK_DIFF_Y="-10.2"/>
      <bbk:Obs TIME_PERIOD="2001-08" OBS_VALUE="4.75" BBK_DIFF="-2.6" BBK_DIFF_Y="-11.2"/>
      <bbk:Obs TIME_PERIOD="2001-07" OBS_VALUE="4.88" BBK_DIFF="-2.8" BBK_DIFF_Y="-7.7"/>
      <bbk:Obs TIME_PERIOD="2001-06" OBS_VALUE="5.01" BBK_DIFF="-2.8" BBK_DIFF_Y="-4.7"/>
      <bbk:Obs TIME_PERIOD="2001-05" OBS_VALUE="5.16" BBK_DIFF="3.0" BBK_DIFF_Y="-2.8"/>
      <bbk:Obs TIME_PERIOD="2001-04" OBS_VALUE="5.01" BBK_DIFF="7.6" BBK_DIFF_Y="-6.7"/>
      <bbk:Obs TIME_PERIOD="2001-03" OBS_VALUE="4.66" BBK_DIFF="-0.9" BBK_DIFF_Y="-10.9"/>
      <bbk:Obs TIME_PERIOD="2001-02" OBS_VALUE="4.7" BBK_DIFF="-1.4" BBK_DIFF_Y="-14.5"/>
      <bbk:Obs TIME_PERIOD="2001-01" OBS_VALUE="4.77" BBK_DIFF="-1.6" BBK_DIFF_Y="-14.9"/>
      <bbk:Obs TIME_PERIOD="2000-12" OBS_VALUE="4.85" BBK_DIFF="-4.0" BBK_DIFF_Y="-8.7"/>
      <bbk:Obs TIME_PERIOD="2000-11" OBS_VALUE="5.05" BBK_DIFF="-3.8" BBK_DIFF_Y="-2.9"/>
      <bbk:Obs TIME_PERIOD="2000-10" OBS_VALUE="5.25" BBK_DIFF="-0.2" BBK_DIFF_Y="0.3"/>
      <bbk:Obs TIME_PERIOD="2000-09" OBS_VALUE="5.26" BBK_DIFF="-1.7" BBK_DIFF_Y="2.3"/>
      <bbk:Obs TIME_PERIOD="2000-08" OBS_VALUE="5.35" BBK_DIFF="1.2" BBK_DIFF_Y="8.6"/>
      <bbk:Obs TIME_PERIOD="2000-07" OBS_VALUE="5.28" BBK_DIFF="0.5" BBK_DIFF_Y="11.1"/>
      <bbk:Obs TIME_PERIOD="2000-06" OBS_VALUE="5.26" BBK_DIFF="-1.0" BBK_DIFF_Y="16.2"/>
      <bbk:Obs TIME_PERIOD="2000-05" OBS_VALUE="5.31" BBK_DIFF="-1.2" BBK_DIFF_Y="31.9"/>
      <bbk:Obs TIME_PERIOD="2000-04" OBS_VALUE="5.37" BBK_DIFF="2.8" BBK_DIFF_Y="42.7"/>
      <bbk:Obs TIME_PERIOD="2000-03" OBS_VALUE="5.23" BBK_DIFF="-4.9" BBK_DIFF_Y="31.4"/>
      <bbk:Obs TIME_PERIOD="2000-02" OBS_VALUE="5.5" BBK_DIFF="-1.9" BBK_DIFF_Y="37.7"/>
      <bbk:Obs TIME_PERIOD="2000-01" OBS_VALUE="5.6" BBK_DIFF="5.6" BBK_DIFF_Y="54.2"/>
      <bbk:Obs TIME_PERIOD="1999-12" OBS_VALUE="5.31" BBK_DIFF="2.1" BBK_DIFF_Y="37.1"/>
      <bbk:Obs TIME_PERIOD="1999-11" OBS_VALUE="5.2" BBK_DIFF="-0.6" BBK_DIFF_Y="30.0"/>
      <bbk:Obs TIME_PERIOD="1999-10" OBS_VALUE="5.23" BBK_DIFF="1.8" BBK_DIFF_Y="26.1"/>
      <bbk:Obs TIME_PERIOD="1999-09" OBS_VALUE="5.14" BBK_DIFF="4.3" BBK_DIFF_Y="28.3"/>
      <bbk:Obs TIME_PERIOD="1999-08" OBS_VALUE="4.93" BBK_DIFF="3.6" BBK_DIFF_Y="16.2"/>
      <bbk:Obs TIME_PERIOD="1999-07" OBS_VALUE="4.76" BBK_DIFF="5.1" BBK_DIFF_Y="1.4"/>
      <bbk:Obs TIME_PERIOD="1999-06" OBS_VALUE="4.53" BBK_DIFF="12.4" BBK_DIFF_Y="-6.5"/>
      <bbk:Obs TIME_PERIOD="1999-05" OBS_VALUE="4.03" BBK_DIFF="6.9" BBK_DIFF_Y="-18.2"/>
      <bbk:Obs TIME_PERIOD="1999-04" OBS_VALUE="3.77" BBK_DIFF="-5.4" BBK_DIFF_Y="-26.3"/>
      <bbk:Obs TIME_PERIOD="1999-03" OBS_VALUE="3.98" BBK_DIFF="-0.4" BBK_DIFF_Y="-19.0"/>
      <bbk:Obs TIME_PERIOD="1999-02" OBS_VALUE="3.99" BBK_DIFF="9.9" BBK_DIFF_Y="-18.7"/>
      <bbk:Obs TIME_PERIOD="1999-01" OBS_VALUE="3.63" BBK_DIFF="-6.1" BBK_DIFF_Y="-27.8"/>
      <bbk:Obs TIME_PERIOD="1998-12" OBS_VALUE="3.87" BBK_DIFF="-3.2" BBK_DIFF_Y="-26.9"/>
      <bbk:Obs TIME_PERIOD="1998-11" OBS_VALUE="4.0" BBK_DIFF="-3.6" BBK_DIFF_Y="-27.5"/>
      <bbk:Obs TIME_PERIOD="1998-10" OBS_VALUE="4.15" BBK_DIFF="3.5" BBK_DIFF_Y="-25.8"/>
      <bbk:Obs TIME_PERIOD="1998-09" OBS_VALUE="4.01" BBK_DIFF="-5.5" BBK_DIFF_Y="-26.9"/>
      <bbk:Obs TIME_PERIOD="1998-08" OBS_VALUE="4.24" BBK_DIFF="-9.6" BBK_DIFF_Y="-24.9"/>
      <bbk:Obs TIME_PERIOD="1998-07" OBS_VALUE="4.69" BBK_DIFF="-3.2" BBK_DIFF_Y="-14.0"/>
      <bbk:Obs TIME_PERIOD="1998-06" OBS_VALUE="4.84" BBK_DIFF="-1.6" BBK_DIFF_Y="-13.5"/>
      <bbk:Obs TIME_PERIOD="1998-05" OBS_VALUE="4.92" BBK_DIFF="-3.7" BBK_DIFF_Y="-16.2"/>
      <bbk:Obs TIME_PERIOD="1998-04" OBS_VALUE="5.11" BBK_DIFF="4.0" BBK_DIFF_Y="-11.2"/>
      <bbk:Obs TIME_PERIOD="1998-03" OBS_VALUE="4.91" BBK_DIFF="0.0" BBK_DIFF_Y="-15.8"/>
      <bbk:Obs TIME_PERIOD="1998-02" OBS_VALUE="4.91" BBK_DIFF="-2.5" BBK_DIFF_Y="-10.0"/>
      <bbk:Obs TIME_PERIOD="1998-01" OBS_VALUE="5.04" BBK_DIFF="-4.9" BBK_DIFF_Y="-12.5"/>
      <bbk:Obs TIME_PERIOD="1997-12" OBS_VALUE="5.3" BBK_DIFF="-4.0" BBK_DIFF_Y="-9.0"/>
      <bbk:Obs TIME_PERIOD="1997-11" OBS_VALUE="5.52" BBK_DIFF="-1.3" BBK_DIFF_Y="-3.9"/>
      <bbk:Obs TIME_PERIOD="1997-10" OBS_VALUE="5.59" BBK_DIFF="2.0" BBK_DIFF_Y="-7.5"/>
      <bbk:Obs TIME_PERIOD="1997-09" OBS_VALUE="5.48" BBK_DIFF="-2.9" BBK_DIFF_Y="-10.3"/>
      <bbk:Obs TIME_PERIOD="1997-08" OBS_VALUE="5.64" BBK_DIFF="3.5" BBK_DIFF_Y="-11.8"/>
      <bbk:Obs TIME_PERIOD="1997-07" OBS_VALUE="5.45" BBK_DIFF="-2.7" BBK_DIFF_Y="-14.9"/>
      <bbk:Obs TIME_PERIOD="1997-06" OBS_VALUE="5.6" BBK_DIFF="-4.6" BBK_DIFF_Y="-15.0"/>
      <bbk:Obs TIME_PERIOD="1997-05" OBS_VALUE="5.87" BBK_DIFF="2.1" BBK_DIFF_Y="-8.8"/>
      <bbk:Obs TIME_PERIOD="1997-04" OBS_VALUE="5.76" BBK_DIFF="-1.4" BBK_DIFF_Y="-9.0"/>
      <bbk:Obs TIME_PERIOD="1997-03" OBS_VALUE="5.83" BBK_DIFF="6.9" BBK_DIFF_Y="-9.8"/>
      <bbk:Obs TIME_PERIOD="1997-02" OBS_VALUE="5.46" BBK_DIFF="-5.2" BBK_DIFF_Y="-15.3"/>
      <bbk:Obs TIME_PERIOD="1997-01" OBS_VALUE="5.76" BBK_DIFF="-1.0" BBK_DIFF_Y="-2.4"/>
      <bbk:Obs TIME_PERIOD="1996-12" OBS_VALUE="5.82" BBK_DIFF="1.3" BBK_DIFF_Y="-3.9"/>
      <bbk:Obs TIME_PERIOD="1996-11" OBS_VALUE="5.74" BBK_DIFF="-5.0" BBK_DIFF_Y="-8.3"/>
      <bbk:Obs TIME_PERIOD="1996-10" OBS_VALUE="6.04" BBK_DIFF="-1.1" BBK_DIFF_Y="-7.5"/>
      <bbk:Obs TIME_PERIOD="1996-09" OBS_VALUE="6.11" BBK_DIFF="-4.5" BBK_DIFF_Y="-9.7"/>
      <bbk:Obs TIME_PERIOD="1996-08" OBS_VALUE="6.4" BBK_DIFF="-0.2" BBK_DIFF_Y="-6.0"/>
      <bbk:Obs TIME_PERIOD="1996-07" OBS_VALUE="6.41" BBK_DIFF="-2.8" BBK_DIFF_Y="-7.4"/>
      <bbk:Obs TIME_PERIOD="1996-06" OBS_VALUE="6.59" BBK_DIFF="2.3" BBK_DIFF_Y="-7.4"/>
      <bbk:Obs TIME_PERIOD="1996-05" OBS_VALUE="6.44" BBK_DIFF="1.9" BBK_DIFF_Y="-3.3"/>
      <bbk:Obs TIME_PERIOD="1996-04" OBS_VALUE="6.32" BBK_DIFF="-2.2" BBK_DIFF_Y="-10.7"/>
      <bbk:Obs TIME_PERIOD="1996-03" OBS_VALUE="6.47" BBK_DIFF="0.3" BBK_DIFF_Y="-10.8"/>
      <bbk:Obs TIME_PERIOD="1996-02" OBS_VALUE="6.45" BBK_DIFF="9.3" BBK_DIFF_Y="-12.9"/>
      <bbk:Obs TIME_PERIOD="1996-01" OBS_VALUE="5.9" BBK_DIFF="-2.6" BBK_DIFF_Y="-21.6"/>
      <bbk:Obs TIME_PERIOD="1995-12" OBS_VALUE="6.05" BBK_DIFF="-3.3" BBK_DIFF_Y="-21.7"/>
      <bbk:Obs TIME_PERIOD="1995-11" OBS_VALUE="6.26" BBK_DIFF="-4.3" BBK_DIFF_Y="-16.6"/>
      <bbk:Obs TIME_PERIOD="1995-10" OBS_VALUE="6.54" BBK_DIFF="-3.4" BBK_DIFF_Y="-14.7"/>
      <bbk:Obs TIME_PERIOD="1995-09" OBS_VALUE="6.77" BBK_DIFF="-0.5" BBK_DIFF_Y="-11.7"/>
      <bbk:Obs TIME_PERIOD="1995-08" OBS_VALUE="6.8" BBK_DIFF="-1.7" BBK_DIFF_Y="-7.8"/>
      <bbk:Obs TIME_PERIOD="1995-07" OBS_VALUE="6.92" BBK_DIFF="-2.8" BBK_DIFF_Y="-2.4"/>
      <bbk:Obs TIME_PERIOD="1995-06" OBS_VALUE="7.12" BBK_DIFF="6.9" BBK_DIFF_Y="0.0"/>
      <bbk:Obs TIME_PERIOD="1995-05" OBS_VALUE="6.66" BBK_DIFF="-5.9" BBK_DIFF_Y="-5.7"/>
      <bbk:Obs TIME_PERIOD="1995-04" OBS_VALUE="7.08" BBK_DIFF="-2.3" BBK_DIFF_Y="4.5"/>
      <bbk:Obs TIME_PERIOD="1995-03" OBS_VALUE="7.25" BBK_DIFF="-2.1" BBK_DIFF_Y="12.2"/>
      <bbk:Obs TIME_PERIOD="1995-02" OBS_VALUE="7.4" BBK_DIFF="-1.7" BBK_DIFF_Y="17.7"/>
      <bbk:Obs TIME_PERIOD="1995-01" OBS_VALUE="7.52" BBK_DIFF="-2.6" BBK_DIFF_Y="32.3"/>
      <bbk:Obs TIME_PERIOD="1994-12" OBS_VALUE="7.73" BBK_DIFF="2.9" BBK_DIFF_Y="37.7"/>
      <bbk:Obs TIME_PERIOD="1994-11" OBS_VALUE="7.51" BBK_DIFF="-2.0" BBK_DIFF_Y="29.8"/>
      <bbk:Obs TIME_PERIOD="1994-10" OBS_VALUE="7.66" BBK_DIFF="0.0" BBK_DIFF_Y="31.4"/>
      <bbk:Obs TIME_PERIOD="1994-09" OBS_VALUE="7.66" BBK_DIFF="3.8" BBK_DIFF_Y="26.1"/>
      <bbk:Obs TIME_PERIOD="1994-08" OBS_VALUE="7.38" BBK_DIFF="4.0" BBK_DIFF_Y="20.2"/>
      <bbk:Obs TIME_PERIOD="1994-07" OBS_VALUE="7.09" BBK_DIFF="-0.4" BBK_DIFF_Y="9.6"/>
      <bbk:Obs TIME_PERIOD="1994-06" OBS_VALUE="7.12" BBK_DIFF="0.8" BBK_DIFF_Y="7.8"/>
      <bbk:Obs TIME_PERIOD="1994-05" OBS_VALUE="7.07" BBK_DIFF="4.2" BBK_DIFF_Y="4.4"/>
      <bbk:Obs TIME_PERIOD="1994-04" OBS_VALUE="6.78" BBK_DIFF="5.0" BBK_DIFF_Y="1.1"/>
      <bbk:Obs TIME_PERIOD="1994-03" OBS_VALUE="6.46" BBK_DIFF="2.7" BBK_DIFF_Y="-2.2"/>
      <bbk:Obs TIME_PERIOD="1994-02" OBS_VALUE="6.28" BBK_DIFF="10.5" BBK_DIFF_Y="-4.2"/>
      <bbk:Obs TIME_PERIOD="1994-01" OBS_VALUE="5.69" BBK_DIFF="1.3" BBK_DIFF_Y="-17.7"/>
      <bbk:Obs TIME_PERIOD="1993-12" OBS_VALUE="5.61" BBK_DIFF="-3.0" BBK_DIFF_Y="-20.1"/>
      <bbk:Obs TIME_PERIOD="1993-11" OBS_VALUE="5.78" BBK_DIFF="-0.9" BBK_DIFF_Y="-19.4"/>
      <bbk:Obs TIME_PERIOD="1993-10" OBS_VALUE="5.83" BBK_DIFF="-4.0" BBK_DIFF_Y="-19.4"/>
      <bbk:Obs TIME_PERIOD="1993-09" OBS_VALUE="6.08" BBK_DIFF="-1.0" BBK_DIFF_Y="-19.7"/>
      <bbk:Obs TIME_PERIOD="1993-08" OBS_VALUE="6.14" BBK_DIFF="-5.1" BBK_DIFF_Y="-23.2"/>
      <bbk:Obs TIME_PERIOD="1993-07" OBS_VALUE="6.47" BBK_DIFF="-2.1" BBK_DIFF_Y="-20.1"/>
      <bbk:Obs TIME_PERIOD="1993-06" OBS_VALUE="6.61" BBK_DIFF="-2.4" BBK_DIFF_Y="-17.7"/>
      <bbk:Obs TIME_PERIOD="1993-05" OBS_VALUE="6.77" BBK_DIFF="1.0" BBK_DIFF_Y="-14.5"/>
      <bbk:Obs TIME_PERIOD="1993-04" OBS_VALUE="6.7" BBK_DIFF="1.5" BBK_DIFF_Y="-15.8"/>
      <bbk:Obs TIME_PERIOD="1993-03" OBS_VALUE="6.6" BBK_DIFF="0.7" BBK_DIFF_Y="-16.5"/>
      <bbk:Obs TIME_PERIOD="1993-02" OBS_VALUE="6.56" BBK_DIFF="-5.1" BBK_DIFF_Y="-15.5"/>
      <bbk:Obs TIME_PERIOD="1993-01" OBS_VALUE="6.91" BBK_DIFF="-1.6" BBK_DIFF_Y="-11.7"/>
      <bbk:Obs TIME_PERIOD="1992-12" OBS_VALUE="7.02" BBK_DIFF="-2.2" BBK_DIFF_Y="-13.2"/>
      <bbk:Obs TIME_PERIOD="1992-11" OBS_VALUE="7.18" BBK_DIFF="-0.8" BBK_DIFF_Y="-13.8"/>
      <bbk:Obs TIME_PERIOD="1992-10" OBS_VALUE="7.24" BBK_DIFF="-4.3" BBK_DIFF_Y="-14.0"/>
      <bbk:Obs TIME_PERIOD="1992-09" OBS_VALUE="7.56" BBK_DIFF="-5.4" BBK_DIFF_Y="-10.2"/>
      <bbk:Obs TIME_PERIOD="1992-08" OBS_VALUE="8.0" BBK_DIFF="-1.3" BBK_DIFF_Y="-5.5"/>
      <bbk:Obs TIME_PERIOD="1992-07" OBS_VALUE="8.1" BBK_DIFF="1.0" BBK_DIFF_Y="-7.3"/>
      <bbk:Obs TIME_PERIOD="1992-06" OBS_VALUE="8.03" BBK_DIFF="1.4" BBK_DIFF_Y="-5.9"/>
      <bbk:Obs TIME_PERIOD="1992-05" OBS_VALUE="7.92" BBK_DIFF="-0.6" BBK_DIFF_Y="-4.6"/>
      <bbk:Obs TIME_PERIOD="1992-04" OBS_VALUE="7.96" BBK_DIFF="0.7" BBK_DIFF_Y="-5.1"/>
      <bbk:Obs TIME_PERIOD="1992-03" OBS_VALUE="7.91" BBK_DIFF="1.8" BBK_DIFF_Y="-8.0"/>
      <bbk:Obs TIME_PERIOD="1992-02" OBS_VALUE="7.76" BBK_DIFF="-0.8" BBK_DIFF_Y="-7.9"/>
      <bbk:Obs TIME_PERIOD="1992-01" OBS_VALUE="7.83" BBK_DIFF="-3.2" BBK_DIFF_Y="-10.8"/>
      <bbk:Obs TIME_PERIOD="1991-12" OBS_VALUE="8.09" BBK_DIFF="-2.9" BBK_DIFF_Y="-11.0"/>
      <bbk:Obs TIME_PERIOD="1991-11" OBS_VALUE="8.32" BBK_DIFF="-1.1" BBK_DIFF_Y="-7.2"/>
      <bbk:Obs TIME_PERIOD="1991-10" OBS_VALUE="8.42" BBK_DIFF="-0.1" BBK_DIFF_Y="-7.5"/>
      <bbk:Obs TIME_PERIOD="1991-09" OBS_VALUE="8.43" BBK_DIFF="-0.4" BBK_DIFF_Y="-9.2"/>
      <bbk:Obs TIME_PERIOD="1991-08" OBS_VALUE="8.46" BBK_DIFF="-3.2" BBK_DIFF_Y="-6.9"/>
      <bbk:Obs TIME_PERIOD="1991-07" OBS_VALUE="8.74" BBK_DIFF="2.5" BBK_DIFF_Y="1.2"/>
      <bbk:Obs TIME_PERIOD="1991-06" OBS_VALUE="8.53" BBK_DIFF="2.8" BBK_DIFF_Y="-3.7"/>
      <bbk:Obs TIME_PERIOD="1991-05" OBS_VALUE="8.3" BBK_DIFF="-1.1" BBK_DIFF_Y="-7.2"/>
      <bbk:Obs TIME_PERIOD="1991-04" OBS_VALUE="8.39" BBK_DIFF="-2.3" BBK_DIFF_Y="-7.0"/>
      <bbk:Obs TIME_PERIOD="1991-03" OBS_VALUE="8.59" BBK_DIFF="1.9" BBK_DIFF_Y="-0.3"/>
      <bbk:Obs TIME_PERIOD="1991-02" OBS_VALUE="8.43" BBK_DIFF="-3.9" BBK_DIFF_Y="-5.2"/>
      <bbk:Obs TIME_PERIOD="1991-01" OBS_VALUE="8.77" BBK_DIFF="-3.4" BBK_DIFF_Y="9.7"/>
      <bbk:Obs TIME_PERIOD="1990-12" OBS_VALUE="9.08" BBK_DIFF="1.3" BBK_DIFF_Y="21.4"/>
      <bbk:Obs TIME_PERIOD="1990-11" OBS_VALUE="8.97" BBK_DIFF="-1.4" BBK_DIFF_Y="18.8"/>
      <bbk:Obs TIME_PERIOD="1990-10" OBS_VALUE="9.1" BBK_DIFF="-2.0" BBK_DIFF_Y="26.0"/>
      <bbk:Obs TIME_PERIOD="1990-09" OBS_VALUE="9.28" BBK_DIFF="2.1" BBK_DIFF_Y="31.1"/>
      <bbk:Obs TIME_PERIOD="1990-08" OBS_VALUE="9.09" BBK_DIFF="5.3" BBK_DIFF_Y="31.7"/>
      <bbk:Obs TIME_PERIOD="1990-07" OBS_VALUE="8.63" BBK_DIFF="-2.5" BBK_DIFF_Y="29.4"/>
      <bbk:Obs TIME_PERIOD="1990-06" OBS_VALUE="8.86" BBK_DIFF="-0.9" BBK_DIFF_Y="29.1"/>
      <bbk:Obs TIME_PERIOD="1990-05" OBS_VALUE="8.93" BBK_DIFF="-1.0" BBK_DIFF_Y="26.3"/>
      <bbk:Obs TIME_PERIOD="1990-04" OBS_VALUE="9.02" BBK_DIFF="4.7" BBK_DIFF_Y="31.0"/>
      <bbk:Obs TIME_PERIOD="1990-03" OBS_VALUE="8.62" BBK_DIFF="-3.0" BBK_DIFF_Y="23.3"/>
      <bbk:Obs TIME_PERIOD="1990-02" OBS_VALUE="8.89" BBK_DIFF="11.2" BBK_DIFF_Y="26.8"/>
      <bbk:Obs TIME_PERIOD="1990-01" OBS_VALUE="7.99" BBK_DIFF="6.8" BBK_DIFF_Y="18.5"/>
      <bbk:Obs TIME_PERIOD="1989-12" OBS_VALUE="7.48" BBK_DIFF="-0.9" BBK_DIFF_Y="13.7"/>
      <bbk:Obs TIME_PERIOD="1989-11" OBS_VALUE="7.55" BBK_DIFF="4.5" BBK_DIFF_Y="16.5"/>
      <bbk:Obs TIME_PERIOD="1989-10" OBS_VALUE="7.22" BBK_DIFF="2.0" BBK_DIFF_Y="15.5"/>
      <bbk:Obs TIME_PERIOD="1989-09" OBS_VALUE="7.08" BBK_DIFF="2.5" BBK_DIFF_Y="8.1"/>
      <bbk:Obs TIME_PERIOD="1989-08" OBS_VALUE="6.9" BBK_DIFF="3.5" BBK_DIFF_Y="1.5"/>
      <bbk:Obs TIME_PERIOD="1989-07" OBS_VALUE="6.67" BBK_DIFF="-2.7" BBK_DIFF_Y="-2.8"/>
      <bbk:Obs TIME_PERIOD="1989-06" OBS_VALUE="6.86" BBK_DIFF="-3.0" BBK_DIFF_Y="3.1"/>
      <bbk:Obs TIME_PERIOD="1989-05" OBS_VALUE="7.07" BBK_DIFF="2.7" BBK_DIFF_Y="6.3"/>
      <bbk:Obs TIME_PERIOD="1989-04" OBS_VALUE="6.89" BBK_DIFF="-1.5" BBK_DIFF_Y="5.6"/>
      <bbk:Obs TIME_PERIOD="1989-03" OBS_VALUE="6.99" BBK_DIFF="-0.3" BBK_DIFF_Y="12.1"/>
      <bbk:Obs TIME_PERIOD="1989-02" OBS_VALUE="7.01" BBK_DIFF="4.0" BBK_DIFF_Y="12.9"/>
      <bbk:Obs TIME_PERIOD="1989-01" OBS_VALUE="6.74" BBK_DIFF="2.5" BBK_DIFF_Y="4.4"/>
      <bbk:Obs TIME_PERIOD="1988-12" OBS_VALUE="6.58" BBK_DIFF="1.5" BBK_DIFF_Y="1.4"/>
      <bbk:Obs TIME_PERIOD="1988-11" OBS_VALUE="6.48" BBK_DIFF="3.6" BBK_DIFF_Y="2.3"/>
      <bbk:Obs TIME_PERIOD="1988-10" OBS_VALUE="6.25" BBK_DIFF="-4.6" BBK_DIFF_Y="-4.4"/>
      <bbk:Obs TIME_PERIOD="1988-09" OBS_VALUE="6.55" BBK_DIFF="-3.6" BBK_DIFF_Y="-4.5"/>
      <bbk:Obs TIME_PERIOD="1988-08" OBS_VALUE="6.8" BBK_DIFF="-1.0" BBK_DIFF_Y="3.9"/>
      <bbk:Obs TIME_PERIOD="1988-07" OBS_VALUE="6.87" BBK_DIFF="3.2" BBK_DIFF_Y="7.9"/>
      <bbk:Obs TIME_PERIOD="1988-06" OBS_VALUE="6.65" BBK_DIFF="-0.1" BBK_DIFF_Y="7.1"/>
      <bbk:Obs TIME_PERIOD="1988-05" OBS_VALUE="6.66" BBK_DIFF="2.1" BBK_DIFF_Y="15.8"/>
      <bbk:Obs TIME_PERIOD="1988-04" OBS_VALUE="6.52" BBK_DIFF="4.5" BBK_DIFF_Y="12.9"/>
      <bbk:Obs TIME_PERIOD="1988-03" OBS_VALUE="6.24" BBK_DIFF="0.4" BBK_DIFF_Y="7.2"/>
      <bbk:Obs TIME_PERIOD="1988-02" OBS_VALUE="6.21" BBK_DIFF="-3.9" BBK_DIFF_Y="1.3"/>
      <bbk:Obs TIME_PERIOD="1988-01" OBS_VALUE="6.46" BBK_DIFF="-0.4" BBK_DIFF_Y="7.6"/>
      <bbk:Obs TIME_PERIOD="1987-12" OBS_VALUE="6.48" BBK_DIFF="2.3" BBK_DIFF_Y="5.9"/>
      <bbk:Obs TIME_PERIOD="1987-11" OBS_VALUE="6.34" BBK_DIFF="-3.1" BBK_DIFF_Y="3.7"/>
      <bbk:Obs TIME_PERIOD="1987-10" OBS_VALUE="6.54" BBK_DIFF="-4.7" BBK_DIFF_Y="2.2"/>
      <bbk:Obs TIME_PERIOD="1987-09" OBS_VALUE="6.86" BBK_DIFF="4.8" BBK_DIFF_Y="11.5"/>
      <bbk:Obs TIME_PERIOD="1987-08" OBS_VALUE="6.54" BBK_DIFF="2.9" BBK_DIFF_Y="12.8"/>
      <bbk:Obs TIME_PERIOD="1987-07" OBS_VALUE="6.36" BBK_DIFF="2.4" BBK_DIFF_Y="6.1"/>
      <bbk:Obs TIME_PERIOD="1987-06" OBS_VALUE="6.21" BBK_DIFF="8.0" BBK_DIFF_Y="2.4"/>
      <bbk:Obs TIME_PERIOD="1987-05" OBS_VALUE="5.75" BBK_DIFF="-0.5" BBK_DIFF_Y="-6.8"/>
      <bbk:Obs TIME_PERIOD="1987-04" OBS_VALUE="5.78" BBK_DIFF="-0.8" BBK_DIFF_Y="1.4"/>
      <bbk:Obs TIME_PERIOD="1987-03" OBS_VALUE="5.82" BBK_DIFF="-5.0" BBK_DIFF_Y="-1.7"/>
      <bbk:Obs TIME_PERIOD="1987-02" OBS_VALUE="6.13" BBK_DIFF="2.0" BBK_DIFF_Y="-1.0"/>
      <bbk:Obs TIME_PERIOD="1987-01" OBS_VALUE="6.01" BBK_DIFF="-1.9" BBK_DIFF_Y="-9.0"/>
      <bbk:Obs TIME_PERIOD="1986-12" OBS_VALUE="6.12" BBK_DIFF="0.2" BBK_DIFF_Y="-7.1"/>
      <bbk:Obs TIME_PERIOD="1986-11" OBS_VALUE="6.11" BBK_DIFF="-4.5" BBK_DIFF_Y="-10.0"/>
      <bbk:Obs TIME_PERIOD="1986-10" OBS_VALUE="6.4" BBK_DIFF="4.0" BBK_DIFF_Y="-7.7"/>
      <bbk:Obs TIME_PERIOD="1986-09" OBS_VALUE="6.15" BBK_DIFF="6.1" BBK_DIFF_Y="-6.2"/>
      <bbk:Obs TIME_PERIOD="1986-08" OBS_VALUE="5.8" BBK_DIFF="-3.2" BBK_DIFF_Y="-11.9"/>
      <bbk:Obs TIME_PERIOD="1986-07" OBS_VALUE="5.99" BBK_DIFF="-1.2" BBK_DIFF_Y="-13.7"/>
      <bbk:Obs TIME_PERIOD="1986-06" OBS_VALUE="6.06" BBK_DIFF="-1.7" BBK_DIFF_Y="-15.1"/>
      <bbk:Obs TIME_PERIOD="1986-05" OBS_VALUE="6.17" BBK_DIFF="8.3" BBK_DIFF_Y="-14.7"/>
      <bbk:Obs TIME_PERIOD="1986-04" OBS_VALUE="5.7" BBK_DIFF="-3.8" BBK_DIFF_Y="-23.1"/>
      <bbk:Obs TIME_PERIOD="1986-03" OBS_VALUE="5.92" BBK_DIFF="-4.3" BBK_DIFF_Y="-20.7"/>
      <bbk:Obs TIME_PERIOD="1986-02" OBS_VALUE="6.19" BBK_DIFF="-6.2" BBK_DIFF_Y="-20.2"/>
      <bbk:Obs TIME_PERIOD="1986-01" OBS_VALUE="6.6" BBK_DIFF="0.2" BBK_DIFF_Y="-10.7"/>
      <bbk:Obs TIME_PERIOD="1985-12" OBS_VALUE="6.59" BBK_DIFF="-3.0" BBK_DIFF_Y="-9.0"/>
      <bbk:Obs TIME_PERIOD="1985-11" OBS_VALUE="6.79" BBK_DIFF="-2.1" BBK_DIFF_Y="-6.5"/>
      <bbk:Obs TIME_PERIOD="1985-10" OBS_VALUE="6.94" BBK_DIFF="5.8" BBK_DIFF_Y="-7.8"/>
      <bbk:Obs TIME_PERIOD="1985-09" OBS_VALUE="6.56" BBK_DIFF="-0.4" BBK_DIFF_Y="-16.3"/>
      <bbk:Obs TIME_PERIOD="1985-08" OBS_VALUE="6.58" BBK_DIFF="-5.2" BBK_DIFF_Y="-17.3"/>
      <bbk:Obs TIME_PERIOD="1985-07" OBS_VALUE="6.95" BBK_DIFF="-2.7" BBK_DIFF_Y="-16.3"/>
      <bbk:Obs TIME_PERIOD="1985-06" OBS_VALUE="7.14" BBK_DIFF="-1.3" BBK_DIFF_Y="-13.7"/>
      <bbk:Obs TIME_PERIOD="1985-05" OBS_VALUE="7.23" BBK_DIFF="-2.4" BBK_DIFF_Y="-13.5"/>
      <bbk:Obs TIME_PERIOD="1985-04" OBS_VALUE="7.41" BBK_DIFF="-0.8" BBK_DIFF_Y="-10.2"/>
      <bbk:Obs TIME_PERIOD="1985-03" OBS_VALUE="7.47" BBK_DIFF="-3.8" BBK_DIFF_Y="-9.1"/>
      <bbk:Obs TIME_PERIOD="1985-02" OBS_VALUE="7.76" BBK_DIFF="5.0" BBK_DIFF_Y="-4.7"/>
      <bbk:Obs TIME_PERIOD="1985-01" OBS_VALUE="7.39" BBK_DIFF="2.2" BBK_DIFF_Y="-11.5"/>
      <bbk:Obs TIME_PERIOD="1984-12" OBS_VALUE="7.24" BBK_DIFF="-0.4" BBK_DIFF_Y="-13.0"/>
      <bbk:Obs TIME_PERIOD="1984-11" OBS_VALUE="7.27" BBK_DIFF="-3.4" BBK_DIFF_Y="-13.2"/>
      <bbk:Obs TIME_PERIOD="1984-10" OBS_VALUE="7.52" BBK_DIFF="-4.0" BBK_DIFF_Y="-9.1"/>
      <bbk:Obs TIME_PERIOD="1984-09" OBS_VALUE="7.84" BBK_DIFF="-1.6" BBK_DIFF_Y="-6.0"/>
      <bbk:Obs TIME_PERIOD="1984-08" OBS_VALUE="7.96" BBK_DIFF="-4.1" BBK_DIFF_Y="-6.6"/>
      <bbk:Obs TIME_PERIOD="1984-07" OBS_VALUE="8.3" BBK_DIFF="0.4" BBK_DIFF_Y="0.4"/>
      <bbk:Obs TIME_PERIOD="1984-06" OBS_VALUE="8.27" BBK_DIFF="-1.1" BBK_DIFF_Y="2.1"/>
      <bbk:Obs TIME_PERIOD="1984-05" OBS_VALUE="8.36" BBK_DIFF="1.5" BBK_DIFF_Y="2.0"/>
      <bbk:Obs TIME_PERIOD="1984-04" OBS_VALUE="8.24" BBK_DIFF="0.3" BBK_DIFF_Y="6.0"/>
      <bbk:Obs TIME_PERIOD="1984-03" OBS_VALUE="8.22" BBK_DIFF="0.9" BBK_DIFF_Y="7.6"/>
      <bbk:Obs TIME_PERIOD="1984-02" OBS_VALUE="8.15" BBK_DIFF="-2.5" BBK_DIFF_Y="5.5"/>
      <bbk:Obs TIME_PERIOD="1984-01" OBS_VALUE="8.35" BBK_DIFF="0.4" BBK_DIFF_Y="5.1"/>
      <bbk:Obs TIME_PERIOD="1983-12" OBS_VALUE="8.32" BBK_DIFF="-0.6" BBK_DIFF_Y="6.5"/>
      <bbk:Obs TIME_PERIOD="1983-11" OBS_VALUE="8.37" BBK_DIFF="1.1" BBK_DIFF_Y="3.3"/>
      <bbk:Obs TIME_PERIOD="1983-10" OBS_VALUE="8.28" BBK_DIFF="-0.7" BBK_DIFF_Y="1.6"/>
      <bbk:Obs TIME_PERIOD="1983-09" OBS_VALUE="8.34" BBK_DIFF="-2.2" BBK_DIFF_Y="-1.7"/>
      <bbk:Obs TIME_PERIOD="1983-08" OBS_VALUE="8.53" BBK_DIFF="3.1" BBK_DIFF_Y="-3.5"/>
      <bbk:Obs TIME_PERIOD="1983-07" OBS_VALUE="8.27" BBK_DIFF="2.0" BBK_DIFF_Y="-8.9"/>
      <bbk:Obs TIME_PERIOD="1983-06" OBS_VALUE="8.1" BBK_DIFF="-1.1" BBK_DIFF_Y="-13.2"/>
      <bbk:Obs TIME_PERIOD="1983-05" OBS_VALUE="8.2" BBK_DIFF="5.4" BBK_DIFF_Y="-6.6"/>
      <bbk:Obs TIME_PERIOD="1983-04" OBS_VALUE="7.78" BBK_DIFF="1.8" BBK_DIFF_Y="-10.6"/>
      <bbk:Obs TIME_PERIOD="1983-03" OBS_VALUE="7.64" BBK_DIFF="-1.0" BBK_DIFF_Y="-17.3"/>
      <bbk:Obs TIME_PERIOD="1983-02" OBS_VALUE="7.72" BBK_DIFF="-2.9" BBK_DIFF_Y="-20.2"/>
      <bbk:Obs TIME_PERIOD="1983-01" OBS_VALUE="7.95" BBK_DIFF="1.8" BBK_DIFF_Y="-18.3"/>
      <bbk:Obs TIME_PERIOD="1982-12" OBS_VALUE="7.81" BBK_DIFF="-3.6" BBK_DIFF_Y="-19.3"/>
      <bbk:Obs TIME_PERIOD="1982-11" OBS_VALUE="8.1" BBK_DIFF="-0.6" BBK_DIFF_Y="-16.2"/>
      <bbk:Obs TIME_PERIOD="1982-10" OBS_VALUE="8.14" BBK_DIFF="-4.0" BBK_DIFF_Y="-19.5"/>
      <bbk:Obs TIME_PERIOD="1982-09" OBS_VALUE="8.48" BBK_DIFF="-4.0" BBK_DIFF_Y="-17.8"/>
      <bbk:Obs TIME_PERIOD="1982-08" OBS_VALUE="8.84" BBK_DIFF="-2.7" BBK_DIFF_Y="-16.6"/>
      <bbk:Obs TIME_PERIOD="1982-07" OBS_VALUE="9.08" BBK_DIFF="-2.7" BBK_DIFF_Y="-13.1"/>
      <bbk:Obs TIME_PERIOD="1982-06" OBS_VALUE="9.33" BBK_DIFF="6.3" BBK_DIFF_Y="-8.9"/>
      <bbk:Obs TIME_PERIOD="1982-05" OBS_VALUE="8.78" BBK_DIFF="1.0" BBK_DIFF_Y="-17.2"/>
      <bbk:Obs TIME_PERIOD="1982-04" OBS_VALUE="8.69" BBK_DIFF="-5.9" BBK_DIFF_Y="-13.0"/>
      <bbk:Obs TIME_PERIOD="1982-03" OBS_VALUE="9.24" BBK_DIFF="-4.5" BBK_DIFF_Y="-6.5"/>
      <bbk:Obs TIME_PERIOD="1982-02" OBS_VALUE="9.68" BBK_DIFF="-0.5" BBK_DIFF_Y="-6.9"/>
      <bbk:Obs TIME_PERIOD="1982-01" OBS_VALUE="9.73" BBK_DIFF="0.5" BBK_DIFF_Y="6.0"/>
      <bbk:Obs TIME_PERIOD="1981-12" OBS_VALUE="9.68" BBK_DIFF="0.2" BBK_DIFF_Y="8.1"/>
      <bbk:Obs TIME_PERIOD="1981-11" OBS_VALUE="9.66" BBK_DIFF="-4.5" BBK_DIFF_Y="11.7"/>
      <bbk:Obs TIME_PERIOD="1981-10" OBS_VALUE="10.12" BBK_DIFF="-2.0" BBK_DIFF_Y="17.8"/>
      <bbk:Obs TIME_PERIOD="1981-09" OBS_VALUE="10.32" BBK_DIFF="-2.7" BBK_DIFF_Y="24.3"/>
      <bbk:Obs TIME_PERIOD="1981-08" OBS_VALUE="10.6" BBK_DIFF="1.4" BBK_DIFF_Y="32.8"/>
      <bbk:Obs TIME_PERIOD="1981-07" OBS_VALUE="10.45" BBK_DIFF="2.0" BBK_DIFF_Y="34.8"/>
      <bbk:Obs TIME_PERIOD="1981-06" OBS_VALUE="10.24" BBK_DIFF="-3.4" BBK_DIFF_Y="28.6"/>
      <bbk:Obs TIME_PERIOD="1981-05" OBS_VALUE="10.6" BBK_DIFF="6.1" BBK_DIFF_Y="28.8"/>
      <bbk:Obs TIME_PERIOD="1981-04" OBS_VALUE="9.99" BBK_DIFF="1.2" BBK_DIFF_Y="12.3"/>
      <bbk:Obs TIME_PERIOD="1981-03" OBS_VALUE="9.88" BBK_DIFF="-5.0" BBK_DIFF_Y="1.1"/>
      <bbk:Obs TIME_PERIOD="1981-02" OBS_VALUE="10.4" BBK_DIFF="13.3" BBK_DIFF_Y="16.6"/>
      <bbk:Obs TIME_PERIOD="1981-01" OBS_VALUE="9.18" BBK_DIFF="2.5" BBK_DIFF_Y="13.0"/>
      <bbk:Obs TIME_PERIOD="1980-12" OBS_VALUE="8.95" BBK_DIFF="3.5" BBK_DIFF_Y="14.0"/>
      <bbk:Obs TIME_PERIOD="1980-11" OBS_VALUE="8.65" BBK_DIFF="0.7" BBK_DIFF_Y="11.1"/>
      <bbk:Obs TIME_PERIOD="1980-10" OBS_VALUE="8.59" BBK_DIFF="3.4" BBK_DIFF_Y="6.9"/>
      <bbk:Obs TIME_PERIOD="1980-09" OBS_VALUE="8.3" BBK_DIFF="4.0" BBK_DIFF_Y="11.2"/>
      <bbk:Obs TIME_PERIOD="1980-08" OBS_VALUE="7.98" BBK_DIFF="2.9" BBK_DIFF_Y="6.6"/>
      <bbk:Obs TIME_PERIOD="1980-07" OBS_VALUE="7.75" BBK_DIFF="-2.6" BBK_DIFF_Y="1.4"/>
      <bbk:Obs TIME_PERIOD="1980-06" OBS_VALUE="7.96" BBK_DIFF="-3.3" BBK_DIFF_Y="-0.3"/>
      <bbk:Obs TIME_PERIOD="1980-05" OBS_VALUE="8.23" BBK_DIFF="-7.5" BBK_DIFF_Y="3.6"/>
      <bbk:Obs TIME_PERIOD="1980-04" OBS_VALUE="8.9" BBK_DIFF="-8.9" BBK_DIFF_Y="19.1"/>
      <bbk:Obs TIME_PERIOD="1980-03" OBS_VALUE="9.77" BBK_DIFF="9.5" BBK_DIFF_Y="35.4"/>
      <bbk:Obs TIME_PERIOD="1980-02" OBS_VALUE="8.92" BBK_DIFF="9.8" BBK_DIFF_Y="24.4"/>
      <bbk:Obs TIME_PERIOD="1980-01" OBS_VALUE="8.12" BBK_DIFF="3.4" BBK_DIFF_Y="16.5"/>
      <bbk:Obs TIME_PERIOD="1979-12" OBS_VALUE="7.85" BBK_DIFF="0.8" BBK_DIFF_Y="17.4"/>
      <bbk:Obs TIME_PERIOD="1979-11" OBS_VALUE="7.79" BBK_DIFF="-3.0" BBK_DIFF_Y="18.0"/>
      <bbk:Obs TIME_PERIOD="1979-10" OBS_VALUE="8.03" BBK_DIFF="7.5" BBK_DIFF_Y="24.9"/>
      <bbk:Obs TIME_PERIOD="1979-09" OBS_VALUE="7.47" BBK_DIFF="-0.2" BBK_DIFF_Y="19.5"/>
      <bbk:Obs TIME_PERIOD="1979-08" OBS_VALUE="7.49" BBK_DIFF="-2.1" BBK_DIFF_Y="19.2"/>
      <bbk:Obs TIME_PERIOD="1979-07" OBS_VALUE="7.65" BBK_DIFF="-4.2" BBK_DIFF_Y="19.4"/>
      <bbk:Obs TIME_PERIOD="1979-06" OBS_VALUE="7.98" BBK_DIFF="0.4" BBK_DIFF_Y="33.0"/>
      <bbk:Obs TIME_PERIOD="1979-05" OBS_VALUE="7.95" BBK_DIFF="6.4" BBK_DIFF_Y="36.0"/>
      <bbk:Obs TIME_PERIOD="1979-04" OBS_VALUE="7.47" BBK_DIFF="3.6" BBK_DIFF_Y="28.8"/>
      <bbk:Obs TIME_PERIOD="1979-03" OBS_VALUE="7.21" BBK_DIFF="0.6" BBK_DIFF_Y="27.7"/>
      <bbk:Obs TIME_PERIOD="1979-02" OBS_VALUE="7.17" BBK_DIFF="2.9" BBK_DIFF_Y="25.9"/>
      <bbk:Obs TIME_PERIOD="1979-01" OBS_VALUE="6.97" BBK_DIFF="4.2" BBK_DIFF_Y="18.1"/>
      <bbk:Obs TIME_PERIOD="1978-12" OBS_VALUE="6.69" BBK_DIFF="1.4" BBK_DIFF_Y="10.3"/>
      <bbk:Obs TIME_PERIOD="1978-11" OBS_VALUE="6.6" BBK_DIFF="2.6" BBK_DIFF_Y="6.4"/>
      <bbk:Obs TIME_PERIOD="1978-10" OBS_VALUE="6.43" BBK_DIFF="2.9" BBK_DIFF_Y="3.3"/>
      <bbk:Obs TIME_PERIOD="1978-09" OBS_VALUE="6.25" BBK_DIFF="-0.5" BBK_DIFF_Y="0.1"/>
      <bbk:Obs TIME_PERIOD="1978-08" OBS_VALUE="6.28" BBK_DIFF="-1.9" BBK_DIFF_Y="0.1"/>
      <bbk:Obs TIME_PERIOD="1978-07" OBS_VALUE="6.4" BBK_DIFF="6.6" BBK_DIFF_Y="0.4"/>
      <bbk:Obs TIME_PERIOD="1978-06" OBS_VALUE="6.0" BBK_DIFF="2.7" BBK_DIFF_Y="-8.7"/>
      <bbk:Obs TIME_PERIOD="1978-05" OBS_VALUE="5.84" BBK_DIFF="0.7" BBK_DIFF_Y="-11.6"/>
      <bbk:Obs TIME_PERIOD="1978-04" OBS_VALUE="5.8" BBK_DIFF="2.7" BBK_DIFF_Y="-11.6"/>
      <bbk:Obs TIME_PERIOD="1978-03" OBS_VALUE="5.65" BBK_DIFF="-0.8" BBK_DIFF_Y="-18.0"/>
      <bbk:Obs TIME_PERIOD="1978-02" OBS_VALUE="5.69" BBK_DIFF="-3.6" BBK_DIFF_Y="-22.6"/>
      <bbk:Obs TIME_PERIOD="1978-01" OBS_VALUE="5.9" BBK_DIFF="-2.7" BBK_DIFF_Y="-20.3"/>
      <bbk:Obs TIME_PERIOD="1977-12" OBS_VALUE="6.07" BBK_DIFF="-2.2" BBK_DIFF_Y="-20.1"/>
      <bbk:Obs TIME_PERIOD="1977-11" OBS_VALUE="6.2" BBK_DIFF="-0.3" BBK_DIFF_Y="-18.8"/>
      <bbk:Obs TIME_PERIOD="1977-10" OBS_VALUE="6.22" BBK_DIFF="-0.3" BBK_DIFF_Y="-22.3"/>
      <bbk:Obs TIME_PERIOD="1977-09" OBS_VALUE="6.24" BBK_DIFF="-0.6" BBK_DIFF_Y="-24.1"/>
      <bbk:Obs TIME_PERIOD="1977-08" OBS_VALUE="6.28" BBK_DIFF="-1.5" BBK_DIFF_Y="-26.0"/>
      <bbk:Obs TIME_PERIOD="1977-07" OBS_VALUE="6.37" BBK_DIFF="-3.0" BBK_DIFF_Y="-26.8"/>
      <bbk:Obs TIME_PERIOD="1977-06" OBS_VALUE="6.57" BBK_DIFF="-0.6" BBK_DIFF_Y="-23.8"/>
      <bbk:Obs TIME_PERIOD="1977-05" OBS_VALUE="6.61" BBK_DIFF="0.7" BBK_DIFF_Y="-23.5"/>
      <bbk:Obs TIME_PERIOD="1977-04" OBS_VALUE="6.57" BBK_DIFF="-4.7" BBK_DIFF_Y="-20.9"/>
      <bbk:Obs TIME_PERIOD="1977-03" OBS_VALUE="6.89" BBK_DIFF="-6.3" BBK_DIFF_Y="-15.5"/>
      <bbk:Obs TIME_PERIOD="1977-02" OBS_VALUE="7.35" BBK_DIFF="-0.7" BBK_DIFF_Y="-11.5"/>
      <bbk:Obs TIME_PERIOD="1977-01" OBS_VALUE="7.4" BBK_DIFF="-2.5" BBK_DIFF_Y="-12.5"/>
      <bbk:Obs TIME_PERIOD="1976-12" OBS_VALUE="7.59" BBK_DIFF="-0.6" BBK_DIFF_Y="-11.9"/>
      <bbk:Obs TIME_PERIOD="1976-11" OBS_VALUE="7.64" BBK_DIFF="-4.7" BBK_DIFF_Y="-12.3"/>
      <bbk:Obs TIME_PERIOD="1976-10" OBS_VALUE="8.01" BBK_DIFF="-2.5" BBK_DIFF_Y="-9.8"/>
      <bbk:Obs TIME_PERIOD="1976-09" OBS_VALUE="8.22" BBK_DIFF="-3.1" BBK_DIFF_Y="-4.8"/>
      <bbk:Obs TIME_PERIOD="1976-08" OBS_VALUE="8.48" BBK_DIFF="-2.7" BBK_DIFF_Y="-1.5"/>
      <bbk:Obs TIME_PERIOD="1976-07" OBS_VALUE="8.71" BBK_DIFF="1.1" BBK_DIFF_Y="0.9"/>
      <bbk:Obs TIME_PERIOD="1976-06" OBS_VALUE="8.62" BBK_DIFF="-0.2" BBK_DIFF_Y="-0.3"/>
      <bbk:Obs TIME_PERIOD="1976-05" OBS_VALUE="8.64" BBK_DIFF="4.1" BBK_DIFF_Y="-0.8"/>
      <bbk:Obs TIME_PERIOD="1976-04" OBS_VALUE="8.3" BBK_DIFF="1.8" BBK_DIFF_Y="-6.1"/>
      <bbk:Obs TIME_PERIOD="1976-03" OBS_VALUE="8.15" BBK_DIFF="-1.9" BBK_DIFF_Y="-12.1"/>
      <bbk:Obs TIME_PERIOD="1976-02" OBS_VALUE="8.31" BBK_DIFF="-1.7" BBK_DIFF_Y="-9.5"/>
      <bbk:Obs TIME_PERIOD="1976-01" OBS_VALUE="8.46" BBK_DIFF="-1.9" BBK_DIFF_Y="-8.8"/>
      <bbk:Obs TIME_PERIOD="1975-12" OBS_VALUE="8.62" BBK_DIFF="-1.0" BBK_DIFF_Y="-12.7"/>
      <bbk:Obs TIME_PERIOD="1975-11" OBS_VALUE="8.71" BBK_DIFF="-1.9" BBK_DIFF_Y="-15.2"/>
      <bbk:Obs TIME_PERIOD="1975-10" OBS_VALUE="8.89" BBK_DIFF="2.9" BBK_DIFF_Y="-17.8"/>
      <bbk:Obs TIME_PERIOD="1975-09" OBS_VALUE="8.63" BBK_DIFF="0.3" BBK_DIFF_Y="-21.0"/>
      <bbk:Obs TIME_PERIOD="1975-08" OBS_VALUE="8.61" BBK_DIFF="-0.3" BBK_DIFF_Y="-20.9"/>
      <bbk:Obs TIME_PERIOD="1975-07" OBS_VALUE="8.64" BBK_DIFF="-0.1" BBK_DIFF_Y="-21.4"/>
      <bbk:Obs TIME_PERIOD="1975-06" OBS_VALUE="8.64" BBK_DIFF="-0.7" BBK_DIFF_Y="-20.7"/>
      <bbk:Obs TIME_PERIOD="1975-05" OBS_VALUE="8.71" BBK_DIFF="-1.6" BBK_DIFF_Y="-18.8"/>
      <bbk:Obs TIME_PERIOD="1975-04" OBS_VALUE="8.85" BBK_DIFF="-4.6" BBK_DIFF_Y="-14.5"/>
      <bbk:Obs TIME_PERIOD="1975-03" OBS_VALUE="9.28" BBK_DIFF="1.1" BBK_DIFF_Y="-10.7"/>
      <bbk:Obs TIME_PERIOD="1975-02" OBS_VALUE="9.18" BBK_DIFF="-1.1" BBK_DIFF_Y="-11.0"/>
      <bbk:Obs TIME_PERIOD="1975-01" OBS_VALUE="9.28" BBK_DIFF="-6.1" BBK_DIFF_Y="-2.9"/>
      <bbk:Obs TIME_PERIOD="1974-12" OBS_VALUE="9.88" BBK_DIFF="-3.9" BBK_DIFF_Y="2.2"/>
      <bbk:Obs TIME_PERIOD="1974-11" OBS_VALUE="10.27" BBK_DIFF="-5.0" BBK_DIFF_Y="7.8"/>
      <bbk:Obs TIME_PERIOD="1974-10" OBS_VALUE="10.81" BBK_DIFF="-1.1" BBK_DIFF_Y="15.1"/>
      <bbk:Obs TIME_PERIOD="1974-09" OBS_VALUE="10.93" BBK_DIFF="0.5" BBK_DIFF_Y="14.2"/>
      <bbk:Obs TIME_PERIOD="1974-08" OBS_VALUE="10.87" BBK_DIFF="-1.1" BBK_DIFF_Y="15.5"/>
      <bbk:Obs TIME_PERIOD="1974-07" OBS_VALUE="10.99" BBK_DIFF="0.8" BBK_DIFF_Y="11.8"/>
      <bbk:Obs TIME_PERIOD="1974-06" OBS_VALUE="10.9" BBK_DIFF="1.6" BBK_DIFF_Y="11.9"/>
      <bbk:Obs TIME_PERIOD="1974-05" OBS_VALUE="10.73" BBK_DIFF="3.7" BBK_DIFF_Y="12.3"/>
      <bbk:Obs TIME_PERIOD="1974-04" OBS_VALUE="10.35" BBK_DIFF="-0.4" BBK_DIFF_Y="17.7"/>
      <bbk:Obs TIME_PERIOD="1974-03" OBS_VALUE="10.39" BBK_DIFF="0.7" BBK_DIFF_Y="20.8"/>
      <bbk:Obs TIME_PERIOD="1974-02" OBS_VALUE="10.31" BBK_DIFF="7.9" BBK_DIFF_Y="21.8"/>
      <bbk:Obs TIME_PERIOD="1974-01" OBS_VALUE="9.55" BBK_DIFF="-1.1" BBK_DIFF_Y="10.5"/>
      <bbk:Obs TIME_PERIOD="1973-12" OBS_VALUE="9.66" BBK_DIFF="1.4" BBK_DIFF_Y="12.5"/>
      <bbk:Obs TIME_PERIOD="1973-11" OBS_VALUE="9.53" BBK_DIFF="1.4" BBK_DIFF_Y="12.4"/>
      <bbk:Obs TIME_PERIOD="1973-10" OBS_VALUE="9.39" BBK_DIFF="-1.8" BBK_DIFF_Y="13.0"/>
      <bbk:Obs TIME_PERIOD="1973-09" OBS_VALUE="9.57" BBK_DIFF="1.7" BBK_DIFF_Y="20.3"/>
      <bbk:Obs TIME_PERIOD="1973-08" OBS_VALUE="9.41" BBK_DIFF="-4.3"/>
      <bbk:Obs TIME_PERIOD="1973-07" OBS_VALUE="9.83" BBK_DIFF="0.9"/>
      <bbk:Obs TIME_PERIOD="1973-06" OBS_VALUE="9.74" BBK_DIFF="2.0"/>
      <bbk:Obs TIME_PERIOD="1973-05" OBS_VALUE="9.55" BBK_DIFF="8.6"/>
      <bbk:Obs TIME_PERIOD="1973-04" OBS_VALUE="8.79" BBK_DIFF="2.2"/>
      <bbk:Obs TIME_PERIOD="1973-03" OBS_VALUE="8.6" BBK_DIFF="1.6"/>
      <bbk:Obs TIME_PERIOD="1973-02" OBS_VALUE="8.47" BBK_DIFF="-2.0"/>
      <bbk:Obs TIME_PERIOD="1973-01" OBS_VALUE="8.65" BBK_DIFF="0.7"/>
      <bbk:Obs TIME_PERIOD="1972-12" OBS_VALUE="8.59" BBK_DIFF="1.2"/>
      <bbk:Obs TIME_PERIOD="1972-11" OBS_VALUE="8.48" BBK_DIFF="2.0"/>
      <bbk:Obs TIME_PERIOD="1972-10" OBS_VALUE="8.32" BBK_DIFF="4.6"/>
      <bbk:Obs TIME_PERIOD="1972-09" OBS_VALUE="7.95"/>
    </bbk:Series>
  </bbk:DataSet>
</CompactData>
