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      <bbk:Obs TIME_PERIOD="1972-06" OBS_VALUE="5.327" BBK_DIFF="124.3" BBK_DIFF_Y="-44.7"/>
      <bbk:Obs TIME_PERIOD="1972-05" OBS_VALUE="-21.882" BBK_DIFF="45.6" BBK_DIFF_Y="-255.6"/>
      <bbk:Obs TIME_PERIOD="1972-04" OBS_VALUE="-40.248" BBK_DIFF="-1807.6" BBK_DIFF_Y="-94.2"/>
      <bbk:Obs TIME_PERIOD="1972-03" OBS_VALUE="2.357" BBK_DIFF="105.6" BBK_DIFF_Y="-41.7"/>
      <bbk:Obs TIME_PERIOD="1972-02" OBS_VALUE="-41.937" BBK_DIFF="-466.6" BBK_DIFF_Y="-321.1"/>
      <bbk:Obs TIME_PERIOD="1972-01" OBS_VALUE="-7.401" BBK_DIFF="-133.5" BBK_DIFF_Y="59.6"/>
      <bbk:Obs TIME_PERIOD="1971-12" OBS_VALUE="22.089" BBK_DIFF="-55.7"/>
      <bbk:Obs TIME_PERIOD="1971-11" OBS_VALUE="49.83" BBK_DIFF="372.0"/>
      <bbk:Obs TIME_PERIOD="1971-10" OBS_VALUE="-18.323" BBK_DIFF="-586.8"/>
      <bbk:Obs TIME_PERIOD="1971-09" OBS_VALUE="3.764" BBK_DIFF="142.5"/>
      <bbk:Obs TIME_PERIOD="1971-08" OBS_VALUE="-8.865" BBK_DIFF="-235.2"/>
      <bbk:Obs TIME_PERIOD="1971-07" OBS_VALUE="6.555" BBK_DIFF="-32.0"/>
      <bbk:Obs TIME_PERIOD="1971-06" OBS_VALUE="9.634" BBK_DIFF="-31.5"/>
      <bbk:Obs TIME_PERIOD="1971-05" OBS_VALUE="14.066" BBK_DIFF="167.9"/>
      <bbk:Obs TIME_PERIOD="1971-04" OBS_VALUE="-20.73" BBK_DIFF="-612.9"/>
      <bbk:Obs TIME_PERIOD="1971-03" OBS_VALUE="4.042" BBK_DIFF="140.6"/>
      <bbk:Obs TIME_PERIOD="1971-02" OBS_VALUE="-9.96" BBK_DIFF="45.6"/>
      <bbk:Obs TIME_PERIOD="1971-01" OBS_VALUE="-18.312"/>
    </bbk:Series>
  </bbk:DataSet>
</CompactData>
