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      <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="-0.511" BBK_DIFF="93.8"/>
      <bbk:Obs TIME_PERIOD="1971-02" OBS_VALUE="-8.224"/>
      <bbk:Obs TIME_PERIOD="1971-01" OBS_VALUE="0.0" BBK_OBS_STATUS="N"/>
    </bbk:Series>
  </bbk:DataSet>
</CompactData>
