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      <bbk:Obs TIME_PERIOD="1972-10" OBS_VALUE="201.197" BBK_DIFF="13.7" BBK_DIFF_Y="-0.5"/>
      <bbk:Obs TIME_PERIOD="1972-09" OBS_VALUE="176.878" BBK_DIFF="-11.6" BBK_DIFF_Y="4.2"/>
      <bbk:Obs TIME_PERIOD="1972-08" OBS_VALUE="200.021" BBK_DIFF="-7.3" BBK_DIFF_Y="5.4"/>
      <bbk:Obs TIME_PERIOD="1972-07" OBS_VALUE="215.832" BBK_DIFF="28.5" BBK_DIFF_Y="3.9"/>
      <bbk:Obs TIME_PERIOD="1972-06" OBS_VALUE="167.981" BBK_DIFF="-3.8" BBK_DIFF_Y="-9.1"/>
      <bbk:Obs TIME_PERIOD="1972-05" OBS_VALUE="174.582" BBK_DIFF="-13.4" BBK_DIFF_Y="-14.8"/>
      <bbk:Obs TIME_PERIOD="1972-04" OBS_VALUE="201.51" BBK_DIFF="-10.9" BBK_DIFF_Y="9.5"/>
      <bbk:Obs TIME_PERIOD="1972-03" OBS_VALUE="226.157" BBK_DIFF="19.3" BBK_DIFF_Y="26.4"/>
      <bbk:Obs TIME_PERIOD="1972-02" OBS_VALUE="189.626" BBK_DIFF="-15.9" BBK_DIFF_Y="-12.9"/>
      <bbk:Obs TIME_PERIOD="1972-01" OBS_VALUE="225.513" BBK_DIFF="7.3" BBK_DIFF_Y="5.2"/>
      <bbk:Obs TIME_PERIOD="1971-12" OBS_VALUE="210.116" BBK_DIFF="8.5"/>
      <bbk:Obs TIME_PERIOD="1971-11" OBS_VALUE="193.614" BBK_DIFF="-4.2"/>
      <bbk:Obs TIME_PERIOD="1971-10" OBS_VALUE="202.197" BBK_DIFF="19.1"/>
      <bbk:Obs TIME_PERIOD="1971-09" OBS_VALUE="169.741" BBK_DIFF="-10.6"/>
      <bbk:Obs TIME_PERIOD="1971-08" OBS_VALUE="189.785" BBK_DIFF="-8.6"/>
      <bbk:Obs TIME_PERIOD="1971-07" OBS_VALUE="207.697" BBK_DIFF="12.4"/>
      <bbk:Obs TIME_PERIOD="1971-06" OBS_VALUE="184.806" BBK_DIFF="-9.9"/>
      <bbk:Obs TIME_PERIOD="1971-05" OBS_VALUE="205.017" BBK_DIFF="11.4"/>
      <bbk:Obs TIME_PERIOD="1971-04" OBS_VALUE="184.021" BBK_DIFF="2.9"/>
      <bbk:Obs TIME_PERIOD="1971-03" OBS_VALUE="178.898" BBK_DIFF="-17.8"/>
      <bbk:Obs TIME_PERIOD="1971-02" OBS_VALUE="217.695" BBK_DIFF="1.6"/>
      <bbk:Obs TIME_PERIOD="1971-01" OBS_VALUE="214.339"/>
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  </bbk:DataSet>
</CompactData>
