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      <bbk:Obs TIME_PERIOD="1972-08" OBS_VALUE="89.693" BBK_DIFF="178.4" BBK_DIFF_Y="902.5"/>
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      <bbk:Obs TIME_PERIOD="1972-05" OBS_VALUE="-19.213" BBK_DIFF="-221.1" BBK_DIFF_Y="-191.0"/>
      <bbk:Obs TIME_PERIOD="1972-04" OBS_VALUE="15.871" BBK_DIFF="170.8" BBK_DIFF_Y="-45.2"/>
      <bbk:Obs TIME_PERIOD="1972-03" OBS_VALUE="-22.423" BBK_DIFF="-270.0" BBK_DIFF_Y="-768.9"/>
      <bbk:Obs TIME_PERIOD="1972-02" OBS_VALUE="13.188" BBK_DIFF="823.4" BBK_DIFF_Y="-72.4"/>
      <bbk:Obs TIME_PERIOD="1972-01" OBS_VALUE="-1.823" BBK_DIFF="92.6" BBK_DIFF_Y="-111.8"/>
      <bbk:Obs TIME_PERIOD="1971-12" OBS_VALUE="-24.799" BBK_DIFF="23.8"/>
      <bbk:Obs TIME_PERIOD="1971-11" OBS_VALUE="-32.539" BBK_DIFF="-203.7"/>
      <bbk:Obs TIME_PERIOD="1971-10" OBS_VALUE="31.364" BBK_DIFF="924.1"/>
      <bbk:Obs TIME_PERIOD="1971-09" OBS_VALUE="-3.806" BBK_DIFF="65.9"/>
      <bbk:Obs TIME_PERIOD="1971-08" OBS_VALUE="-11.177" BBK_DIFF="57.8"/>
      <bbk:Obs TIME_PERIOD="1971-07" OBS_VALUE="-26.462" BBK_DIFF="-54.1"/>
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      <bbk:Obs TIME_PERIOD="1971-05" OBS_VALUE="21.124" BBK_DIFF="-27.1"/>
      <bbk:Obs TIME_PERIOD="1971-04" OBS_VALUE="28.96" BBK_DIFF="764.0"/>
      <bbk:Obs TIME_PERIOD="1971-03" OBS_VALUE="3.352" BBK_DIFF="-93.0"/>
      <bbk:Obs TIME_PERIOD="1971-02" OBS_VALUE="47.806" BBK_DIFF="209.5"/>
      <bbk:Obs TIME_PERIOD="1971-01" OBS_VALUE="15.446"/>
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  </bbk:DataSet>
</CompactData>
