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      <bbk:Obs TIME_PERIOD="1972-08" OBS_VALUE="178.996" BBK_DIFF="0.4" BBK_DIFF_Y="368.2"/>
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      <bbk:Obs TIME_PERIOD="1972-05" OBS_VALUE="297.048" BBK_DIFF="93.9" BBK_DIFF_Y="848.5"/>
      <bbk:Obs TIME_PERIOD="1972-04" OBS_VALUE="153.199" BBK_DIFF="-78.3" BBK_DIFF_Y="67.5"/>
      <bbk:Obs TIME_PERIOD="1972-03" OBS_VALUE="706.888" BBK_DIFF="337.5" BBK_DIFF_Y="2591.0"/>
      <bbk:Obs TIME_PERIOD="1972-02" OBS_VALUE="161.58" BBK_DIFF="-11.5" BBK_DIFF_Y="69.4"/>
      <bbk:Obs TIME_PERIOD="1972-01" OBS_VALUE="182.653" BBK_DIFF="-39.7" BBK_DIFF_Y="13297.5"/>
      <bbk:Obs TIME_PERIOD="1971-12" OBS_VALUE="302.996" BBK_DIFF="364.7"/>
      <bbk:Obs TIME_PERIOD="1971-11" OBS_VALUE="65.199" BBK_DIFF="4.0"/>
      <bbk:Obs TIME_PERIOD="1971-10" OBS_VALUE="62.715" BBK_DIFF="-46.2"/>
      <bbk:Obs TIME_PERIOD="1971-09" OBS_VALUE="116.472" BBK_DIFF="204.7"/>
      <bbk:Obs TIME_PERIOD="1971-08" OBS_VALUE="38.23" BBK_DIFF="-0.3"/>
      <bbk:Obs TIME_PERIOD="1971-07" OBS_VALUE="38.339" BBK_DIFF="56.8"/>
      <bbk:Obs TIME_PERIOD="1971-06" OBS_VALUE="24.456" BBK_DIFF="-21.9"/>
      <bbk:Obs TIME_PERIOD="1971-05" OBS_VALUE="31.317" BBK_DIFF="-65.8"/>
      <bbk:Obs TIME_PERIOD="1971-04" OBS_VALUE="91.458" BBK_DIFF="248.2"/>
      <bbk:Obs TIME_PERIOD="1971-03" OBS_VALUE="26.269" BBK_DIFF="-72.5"/>
      <bbk:Obs TIME_PERIOD="1971-02" OBS_VALUE="95.39" BBK_DIFF="6992.3"/>
      <bbk:Obs TIME_PERIOD="1971-01" OBS_VALUE="-1.384"/>
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  </bbk:DataSet>
</CompactData>
