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      <bbk:Obs TIME_PERIOD="1972-08" OBS_VALUE="74.006" BBK_DIFF="20.6" BBK_DIFF_Y="192.5"/>
      <bbk:Obs TIME_PERIOD="1972-07" OBS_VALUE="61.355" BBK_DIFF="-50.1" BBK_DIFF_Y="72.8"/>
      <bbk:Obs TIME_PERIOD="1972-06" OBS_VALUE="122.896" BBK_DIFF="164.6" BBK_DIFF_Y="566.2"/>
      <bbk:Obs TIME_PERIOD="1972-05" OBS_VALUE="-190.346" BBK_DIFF="-522.3" BBK_DIFF_Y="-1031.8"/>
      <bbk:Obs TIME_PERIOD="1972-04" OBS_VALUE="-30.588" BBK_DIFF="-199.8" BBK_DIFF_Y="-701.1"/>
      <bbk:Obs TIME_PERIOD="1972-03" OBS_VALUE="30.642" BBK_DIFF="-28.9" BBK_DIFF_Y="71.4"/>
      <bbk:Obs TIME_PERIOD="1972-02" OBS_VALUE="43.077" BBK_DIFF="423.6" BBK_DIFF_Y="159.8"/>
      <bbk:Obs TIME_PERIOD="1972-01" OBS_VALUE="-13.312" BBK_DIFF="-109.7" BBK_DIFF_Y="-167.9"/>
      <bbk:Obs TIME_PERIOD="1971-12" OBS_VALUE="136.741" BBK_DIFF="435.6"/>
      <bbk:Obs TIME_PERIOD="1971-11" OBS_VALUE="25.531" BBK_DIFF="149.7"/>
      <bbk:Obs TIME_PERIOD="1971-10" OBS_VALUE="10.226" BBK_DIFF="-57.9"/>
      <bbk:Obs TIME_PERIOD="1971-09" OBS_VALUE="24.261" BBK_DIFF="-4.1"/>
      <bbk:Obs TIME_PERIOD="1971-08" OBS_VALUE="25.305" BBK_DIFF="-28.7"/>
      <bbk:Obs TIME_PERIOD="1971-07" OBS_VALUE="35.502" BBK_DIFF="92.5"/>
      <bbk:Obs TIME_PERIOD="1971-06" OBS_VALUE="18.446" BBK_DIFF="-9.7"/>
      <bbk:Obs TIME_PERIOD="1971-05" OBS_VALUE="20.428" BBK_DIFF="301.4"/>
      <bbk:Obs TIME_PERIOD="1971-04" OBS_VALUE="5.089" BBK_DIFF="-71.5"/>
      <bbk:Obs TIME_PERIOD="1971-03" OBS_VALUE="17.874" BBK_DIFF="7.8"/>
      <bbk:Obs TIME_PERIOD="1971-02" OBS_VALUE="16.583" BBK_DIFF="-15.4"/>
      <bbk:Obs TIME_PERIOD="1971-01" OBS_VALUE="19.594"/>
    </bbk:Series>
  </bbk:DataSet>
</CompactData>
