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      <bbk:Obs TIME_PERIOD="1972-08" OBS_VALUE="-31.278" BBK_DIFF="-257.7" BBK_DIFF_Y="-37.3"/>
      <bbk:Obs TIME_PERIOD="1972-07" OBS_VALUE="19.833" BBK_DIFF="-74.5" BBK_DIFF_Y="-67.5"/>
      <bbk:Obs TIME_PERIOD="1972-06" OBS_VALUE="77.724" BBK_DIFF="202.0" BBK_DIFF_Y="896.8"/>
      <bbk:Obs TIME_PERIOD="1972-05" OBS_VALUE="-76.19" BBK_DIFF="-449.2" BBK_DIFF_Y="-19.8"/>
      <bbk:Obs TIME_PERIOD="1972-04" OBS_VALUE="-13.872" BBK_DIFF="-117.8" BBK_DIFF_Y="-126.4"/>
      <bbk:Obs TIME_PERIOD="1972-03" OBS_VALUE="78.027" BBK_DIFF="166.8" BBK_DIFF_Y="-47.5"/>
      <bbk:Obs TIME_PERIOD="1972-02" OBS_VALUE="-116.868" BBK_DIFF="-1015.5" BBK_DIFF_Y="46.4"/>
      <bbk:Obs TIME_PERIOD="1972-01" OBS_VALUE="12.765" BBK_DIFF="-93.0" BBK_DIFF_Y="112.8"/>
      <bbk:Obs TIME_PERIOD="1971-12" OBS_VALUE="182.849" BBK_DIFF="287.3"/>
      <bbk:Obs TIME_PERIOD="1971-11" OBS_VALUE="47.214" BBK_DIFF="428.3"/>
      <bbk:Obs TIME_PERIOD="1971-10" OBS_VALUE="-14.382" BBK_DIFF="-220.2"/>
      <bbk:Obs TIME_PERIOD="1971-09" OBS_VALUE="11.964" BBK_DIFF="152.5"/>
      <bbk:Obs TIME_PERIOD="1971-08" OBS_VALUE="-22.777" BBK_DIFF="-137.3"/>
      <bbk:Obs TIME_PERIOD="1971-07" OBS_VALUE="61.031" BBK_DIFF="725.7"/>
      <bbk:Obs TIME_PERIOD="1971-06" OBS_VALUE="-9.754" BBK_DIFF="84.7"/>
      <bbk:Obs TIME_PERIOD="1971-05" OBS_VALUE="-63.622" BBK_DIFF="-221.2"/>
      <bbk:Obs TIME_PERIOD="1971-04" OBS_VALUE="52.484" BBK_DIFF="-64.7"/>
      <bbk:Obs TIME_PERIOD="1971-03" OBS_VALUE="148.572" BBK_DIFF="168.2"/>
      <bbk:Obs TIME_PERIOD="1971-02" OBS_VALUE="-217.96" BBK_DIFF="-118.2"/>
      <bbk:Obs TIME_PERIOD="1971-01" OBS_VALUE="-99.9"/>
    </bbk:Series>
  </bbk:DataSet>
</CompactData>
