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      <bbk:Obs TIME_PERIOD="1972-01" OBS_VALUE="0.074" BBK_DIFF="-99.5" BBK_DIFF_Y="-99.4"/>
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      <bbk:Obs TIME_PERIOD="1971-09" OBS_VALUE="70.506" BBK_DIFF="76.6"/>
      <bbk:Obs TIME_PERIOD="1971-08" OBS_VALUE="39.932" BBK_DIFF="-86.2"/>
      <bbk:Obs TIME_PERIOD="1971-07" OBS_VALUE="289.583" BBK_DIFF="162.4"/>
      <bbk:Obs TIME_PERIOD="1971-06" OBS_VALUE="110.347" BBK_DIFF="197.8"/>
      <bbk:Obs TIME_PERIOD="1971-05" OBS_VALUE="-112.87" BBK_DIFF="-171.8"/>
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      <bbk:Obs TIME_PERIOD="1971-03" OBS_VALUE="103.647" BBK_DIFF="300.4"/>
      <bbk:Obs TIME_PERIOD="1971-02" OBS_VALUE="25.883" BBK_DIFF="103.5"/>
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  </bbk:DataSet>
</CompactData>
