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      <bbk:Obs TIME_PERIOD="1972-05" OBS_VALUE="127.873" BBK_DIFF="19.0" BBK_DIFF_Y="26.4"/>
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      <bbk:Obs TIME_PERIOD="1972-03" OBS_VALUE="734.403" BBK_DIFF="614.3" BBK_DIFF_Y="69.5"/>
      <bbk:Obs TIME_PERIOD="1972-02" OBS_VALUE="102.819" BBK_DIFF="-63.9" BBK_DIFF_Y="-41.2"/>
      <bbk:Obs TIME_PERIOD="1972-01" OBS_VALUE="285.15" BBK_DIFF="-5.3" BBK_DIFF_Y="10.1"/>
      <bbk:Obs TIME_PERIOD="1971-12" OBS_VALUE="301.222" BBK_DIFF="94.0"/>
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      <bbk:Obs TIME_PERIOD="1971-10" OBS_VALUE="62.806" BBK_DIFF="-71.5"/>
      <bbk:Obs TIME_PERIOD="1971-09" OBS_VALUE="220.174" BBK_DIFF="46.1"/>
      <bbk:Obs TIME_PERIOD="1971-08" OBS_VALUE="150.752" BBK_DIFF="-31.1"/>
      <bbk:Obs TIME_PERIOD="1971-07" OBS_VALUE="218.78" BBK_DIFF="2.9"/>
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      <bbk:Obs TIME_PERIOD="1971-05" OBS_VALUE="101.19" BBK_DIFF="55.1"/>
      <bbk:Obs TIME_PERIOD="1971-04" OBS_VALUE="65.243" BBK_DIFF="-84.9"/>
      <bbk:Obs TIME_PERIOD="1971-03" OBS_VALUE="433.2" BBK_DIFF="147.7"/>
      <bbk:Obs TIME_PERIOD="1971-02" OBS_VALUE="174.915" BBK_DIFF="-32.4"/>
      <bbk:Obs TIME_PERIOD="1971-01" OBS_VALUE="258.887"/>
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  </bbk:DataSet>
</CompactData>
