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      <bbk:Obs TIME_PERIOD="1972-06" OBS_VALUE="-10.832" BBK_DIFF="-166.5"/>
      <bbk:Obs TIME_PERIOD="1972-05" OBS_VALUE="16.294" BBK_DIFF="411.1"/>
      <bbk:Obs TIME_PERIOD="1972-04" OBS_VALUE="-5.238" BBK_DIFF="-1147.1"/>
      <bbk:Obs TIME_PERIOD="1972-03" OBS_VALUE="-0.42" BBK_DIFF="-172.5"/>
      <bbk:Obs TIME_PERIOD="1972-02" OBS_VALUE="0.579" BBK_DIFF="151.7"/>
      <bbk:Obs TIME_PERIOD="1972-01" OBS_VALUE="-1.12"/>
      <bbk:Obs TIME_PERIOD="1971-12" OBS_VALUE="0.0" BBK_OBS_STATUS="N"/>
      <bbk:Obs TIME_PERIOD="1971-11" OBS_VALUE="0.0" BBK_OBS_STATUS="N"/>
      <bbk:Obs TIME_PERIOD="1971-10" OBS_VALUE="0.0" BBK_OBS_STATUS="N"/>
      <bbk:Obs TIME_PERIOD="1971-09" OBS_VALUE="0.0" BBK_OBS_STATUS="N"/>
      <bbk:Obs TIME_PERIOD="1971-08" OBS_VALUE="0.0" BBK_OBS_STATUS="N"/>
      <bbk:Obs TIME_PERIOD="1971-07" OBS_VALUE="0.0" BBK_OBS_STATUS="N"/>
      <bbk:Obs TIME_PERIOD="1971-06" OBS_VALUE="0.0" BBK_OBS_STATUS="N"/>
      <bbk:Obs TIME_PERIOD="1971-05" OBS_VALUE="0.0" BBK_OBS_STATUS="N"/>
      <bbk:Obs TIME_PERIOD="1971-04" OBS_VALUE="0.0" BBK_OBS_STATUS="N"/>
      <bbk:Obs TIME_PERIOD="1971-03" OBS_VALUE="0.0" BBK_OBS_STATUS="N"/>
      <bbk:Obs TIME_PERIOD="1971-02" OBS_VALUE="0.0" BBK_OBS_STATUS="N"/>
      <bbk:Obs TIME_PERIOD="1971-01" OBS_VALUE="0.0" BBK_OBS_STATUS="N"/>
    </bbk:Series>
  </bbk:DataSet>
</CompactData>
