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      <bbk:Obs TIME_PERIOD="1972-10" OBS_VALUE="26.672" BBK_DIFF="217.8" BBK_DIFF_Y="1022.3"/>
      <bbk:Obs TIME_PERIOD="1972-09" OBS_VALUE="-22.651" BBK_DIFF="45.2" BBK_DIFF_Y="46.4"/>
      <bbk:Obs TIME_PERIOD="1972-08" OBS_VALUE="-41.305" BBK_DIFF="-296.3" BBK_DIFF_Y="-1605.8"/>
      <bbk:Obs TIME_PERIOD="1972-07" OBS_VALUE="21.047" BBK_DIFF="145.5" BBK_DIFF_Y="143.2"/>
      <bbk:Obs TIME_PERIOD="1972-06" OBS_VALUE="8.572" BBK_DIFF="-23.3" BBK_DIFF_Y="156.9"/>
      <bbk:Obs TIME_PERIOD="1972-05" OBS_VALUE="11.18" BBK_DIFF="71.8" BBK_DIFF_Y="64.5"/>
      <bbk:Obs TIME_PERIOD="1972-04" OBS_VALUE="6.506" BBK_DIFF="219.5" BBK_DIFF_Y="-58.1"/>
      <bbk:Obs TIME_PERIOD="1972-03" OBS_VALUE="-5.443" BBK_DIFF="-360.9" BBK_DIFF_Y="63.4"/>
      <bbk:Obs TIME_PERIOD="1972-02" OBS_VALUE="2.086" BBK_DIFF="104.7" BBK_DIFF_Y="-75.6"/>
      <bbk:Obs TIME_PERIOD="1972-01" OBS_VALUE="-44.209" BBK_DIFF="-327.6" BBK_DIFF_Y="-169.9"/>
      <bbk:Obs TIME_PERIOD="1971-12" OBS_VALUE="19.42" BBK_DIFF="541.4"/>
      <bbk:Obs TIME_PERIOD="1971-11" OBS_VALUE="-4.4" BBK_DIFF="-52.1"/>
      <bbk:Obs TIME_PERIOD="1971-10" OBS_VALUE="-2.892" BBK_DIFF="93.2"/>
      <bbk:Obs TIME_PERIOD="1971-09" OBS_VALUE="-42.281" BBK_DIFF="-1641.4"/>
      <bbk:Obs TIME_PERIOD="1971-08" OBS_VALUE="2.743" BBK_DIFF="105.6"/>
      <bbk:Obs TIME_PERIOD="1971-07" OBS_VALUE="-48.735" BBK_DIFF="-223.6"/>
      <bbk:Obs TIME_PERIOD="1971-06" OBS_VALUE="-15.062" BBK_DIFF="-321.6"/>
      <bbk:Obs TIME_PERIOD="1971-05" OBS_VALUE="6.796" BBK_DIFF="-56.3"/>
      <bbk:Obs TIME_PERIOD="1971-04" OBS_VALUE="15.545" BBK_DIFF="204.6"/>
      <bbk:Obs TIME_PERIOD="1971-03" OBS_VALUE="-14.86" BBK_DIFF="-273.9"/>
      <bbk:Obs TIME_PERIOD="1971-02" OBS_VALUE="8.544" BBK_DIFF="-86.5"/>
      <bbk:Obs TIME_PERIOD="1971-01" OBS_VALUE="63.218"/>
    </bbk:Series>
  </bbk:DataSet>
</CompactData>
