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      <bbk:Obs TIME_PERIOD="1972-08" OBS_VALUE="0.0" BBK_OBS_STATUS="N" BBK_DIFF="-100.0" BBK_DIFF_Y="-100.0"/>
      <bbk:Obs TIME_PERIOD="1972-07" OBS_VALUE="0.002" BBK_DIFF_Y="-98.3"/>
      <bbk:Obs TIME_PERIOD="1972-06" OBS_VALUE="0.0" BBK_OBS_STATUS="N" BBK_DIFF_Y="-100.0"/>
      <bbk:Obs TIME_PERIOD="1972-05" OBS_VALUE="0.0" BBK_OBS_STATUS="N" BBK_DIFF_Y="-100.0"/>
      <bbk:Obs TIME_PERIOD="1972-04" OBS_VALUE="0.0" BBK_OBS_STATUS="N" BBK_DIFF="100.0"/>
      <bbk:Obs TIME_PERIOD="1972-03" OBS_VALUE="-0.026" BBK_DIFF_Y="-966.7"/>
      <bbk:Obs TIME_PERIOD="1972-02" OBS_VALUE="0.0" BBK_OBS_STATUS="N" BBK_DIFF_Y="-100.0"/>
      <bbk:Obs TIME_PERIOD="1972-01" OBS_VALUE="0.0" BBK_OBS_STATUS="N" BBK_DIFF="-100.0"/>
      <bbk:Obs TIME_PERIOD="1971-12" OBS_VALUE="0.16" BBK_DIFF="15900.0"/>
      <bbk:Obs TIME_PERIOD="1971-11" OBS_VALUE="0.001" BBK_DIFF="-98.4"/>
      <bbk:Obs TIME_PERIOD="1971-10" OBS_VALUE="0.063" BBK_DIFF="200.0"/>
      <bbk:Obs TIME_PERIOD="1971-09" OBS_VALUE="0.021" BBK_DIFF="-4.5"/>
      <bbk:Obs TIME_PERIOD="1971-08" OBS_VALUE="0.022" BBK_DIFF="-81.4"/>
      <bbk:Obs TIME_PERIOD="1971-07" OBS_VALUE="0.118" BBK_DIFF="972.7"/>
      <bbk:Obs TIME_PERIOD="1971-06" OBS_VALUE="0.011" BBK_DIFF="-93.4"/>
      <bbk:Obs TIME_PERIOD="1971-05" OBS_VALUE="0.167"/>
      <bbk:Obs TIME_PERIOD="1971-04" OBS_VALUE="0.0" BBK_OBS_STATUS="N" BBK_DIFF="-100.0"/>
      <bbk:Obs TIME_PERIOD="1971-03" OBS_VALUE="0.003" BBK_DIFF="-95.4"/>
      <bbk:Obs TIME_PERIOD="1971-02" OBS_VALUE="0.065"/>
      <bbk:Obs TIME_PERIOD="1971-01" OBS_VALUE="0.0" BBK_OBS_STATUS="N"/>
    </bbk:Series>
  </bbk:DataSet>
</CompactData>
