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      <bbk:Obs TIME_PERIOD="1972-10" OBS_VALUE="0.657" BBK_DIFF="133.8" BBK_DIFF_Y="882.1"/>
      <bbk:Obs TIME_PERIOD="1972-09" OBS_VALUE="-1.942" BBK_DIFF="-248.9" BBK_DIFF_Y="-175.0"/>
      <bbk:Obs TIME_PERIOD="1972-08" OBS_VALUE="1.304" BBK_DIFF="133.0" BBK_DIFF_Y="125.0"/>
      <bbk:Obs TIME_PERIOD="1972-07" OBS_VALUE="-3.956" BBK_DIFF="-127.8" BBK_DIFF_Y="-268.8"/>
      <bbk:Obs TIME_PERIOD="1972-06" OBS_VALUE="14.25" BBK_DIFF="373.2" BBK_DIFF_Y="59.6"/>
      <bbk:Obs TIME_PERIOD="1972-05" OBS_VALUE="-5.216" BBK_DIFF="-279.7" BBK_DIFF_Y="-265.0"/>
      <bbk:Obs TIME_PERIOD="1972-04" OBS_VALUE="2.902" BBK_DIFF="-30.4" BBK_DIFF_Y="-70.4"/>
      <bbk:Obs TIME_PERIOD="1972-03" OBS_VALUE="4.171" BBK_DIFF="3375.8" BBK_DIFF_Y="6.9"/>
      <bbk:Obs TIME_PERIOD="1972-02" OBS_VALUE="0.12" BBK_DIFF="-90.4" BBK_DIFF_Y="-63.5"/>
      <bbk:Obs TIME_PERIOD="1972-01" OBS_VALUE="1.252" BBK_DIFF="46.1" BBK_DIFF_Y="235.8"/>
      <bbk:Obs TIME_PERIOD="1971-12" OBS_VALUE="0.857" BBK_DIFF="402.8"/>
      <bbk:Obs TIME_PERIOD="1971-11" OBS_VALUE="-0.283" BBK_DIFF="-236.9"/>
      <bbk:Obs TIME_PERIOD="1971-10" OBS_VALUE="-0.084" BBK_DIFF="-103.2"/>
      <bbk:Obs TIME_PERIOD="1971-09" OBS_VALUE="2.588" BBK_DIFF="149.6"/>
      <bbk:Obs TIME_PERIOD="1971-08" OBS_VALUE="-5.221" BBK_DIFF="-322.7"/>
      <bbk:Obs TIME_PERIOD="1971-07" OBS_VALUE="2.344" BBK_DIFF="-73.7"/>
      <bbk:Obs TIME_PERIOD="1971-06" OBS_VALUE="8.926" BBK_DIFF="182.4"/>
      <bbk:Obs TIME_PERIOD="1971-05" OBS_VALUE="3.161" BBK_DIFF="-67.7"/>
      <bbk:Obs TIME_PERIOD="1971-04" OBS_VALUE="9.8" BBK_DIFF="151.2"/>
      <bbk:Obs TIME_PERIOD="1971-03" OBS_VALUE="3.902" BBK_DIFF="1086.0"/>
      <bbk:Obs TIME_PERIOD="1971-02" OBS_VALUE="0.329" BBK_DIFF="135.7"/>
      <bbk:Obs TIME_PERIOD="1971-01" OBS_VALUE="-0.922"/>
    </bbk:Series>
  </bbk:DataSet>
</CompactData>
