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      <bbk:Obs TIME_PERIOD="1972-06" OBS_VALUE="-66.61" BBK_DIFF="-783.2" BBK_DIFF_Y="-97.1"/>
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      <bbk:Obs TIME_PERIOD="1972-03" OBS_VALUE="-9.923" BBK_DIFF="-199.1" BBK_DIFF_Y="-130.2"/>
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      <bbk:Obs TIME_PERIOD="1972-01" OBS_VALUE="-16.786" BBK_DIFF="72.1" BBK_DIFF_Y="-457.1"/>
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      <bbk:Obs TIME_PERIOD="1971-09" OBS_VALUE="34.176" BBK_DIFF="-41.8"/>
      <bbk:Obs TIME_PERIOD="1971-08" OBS_VALUE="58.746" BBK_DIFF="7901.6"/>
      <bbk:Obs TIME_PERIOD="1971-07" OBS_VALUE="-0.753" BBK_DIFF="97.8"/>
      <bbk:Obs TIME_PERIOD="1971-06" OBS_VALUE="-33.788" BBK_DIFF="-139.7"/>
      <bbk:Obs TIME_PERIOD="1971-05" OBS_VALUE="85.034" BBK_DIFF="67.3"/>
      <bbk:Obs TIME_PERIOD="1971-04" OBS_VALUE="50.834" BBK_DIFF="54.8"/>
      <bbk:Obs TIME_PERIOD="1971-03" OBS_VALUE="32.828" BBK_DIFF="1753.6"/>
      <bbk:Obs TIME_PERIOD="1971-02" OBS_VALUE="1.771" BBK_DIFF="-62.3"/>
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  </bbk:DataSet>
</CompactData>
