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      <bbk:Obs TIME_PERIOD="1972-08" OBS_VALUE="-5.221" BBK_DIFF="-47.4" BBK_DIFF_Y="-335.1"/>
      <bbk:Obs TIME_PERIOD="1972-07" OBS_VALUE="-3.542" BBK_DIFF="-319.6" BBK_DIFF_Y="47.5"/>
      <bbk:Obs TIME_PERIOD="1972-06" OBS_VALUE="1.613" BBK_DIFF="446.1" BBK_DIFF_Y="122.6"/>
      <bbk:Obs TIME_PERIOD="1972-05" OBS_VALUE="-0.466" BBK_DIFF="-374.1" BBK_DIFF_Y="95.8"/>
      <bbk:Obs TIME_PERIOD="1972-04" OBS_VALUE="0.17" BBK_DIFF="106.0" BBK_DIFF_Y="-94.3"/>
      <bbk:Obs TIME_PERIOD="1972-03" OBS_VALUE="-2.836" BBK_DIFF="72.6" BBK_DIFF_Y="-127.7"/>
      <bbk:Obs TIME_PERIOD="1972-02" OBS_VALUE="-10.339" BBK_DIFF="-224.3" BBK_DIFF_Y="-714.0"/>
      <bbk:Obs TIME_PERIOD="1972-01" OBS_VALUE="8.316" BBK_DIFF="670.4" BBK_DIFF_Y="263.4"/>
      <bbk:Obs TIME_PERIOD="1971-12" OBS_VALUE="-1.458" BBK_DIFF="74.0"/>
      <bbk:Obs TIME_PERIOD="1971-11" OBS_VALUE="-5.607" BBK_DIFF="41.0"/>
      <bbk:Obs TIME_PERIOD="1971-10" OBS_VALUE="-9.503" BBK_DIFF="-0.8"/>
      <bbk:Obs TIME_PERIOD="1971-09" OBS_VALUE="-9.432" BBK_DIFF="-524.7"/>
      <bbk:Obs TIME_PERIOD="1971-08" OBS_VALUE="2.221" BBK_DIFF="132.9"/>
      <bbk:Obs TIME_PERIOD="1971-07" OBS_VALUE="-6.743" BBK_DIFF="5.3"/>
      <bbk:Obs TIME_PERIOD="1971-06" OBS_VALUE="-7.123" BBK_DIFF="35.1"/>
      <bbk:Obs TIME_PERIOD="1971-05" OBS_VALUE="-10.982" BBK_DIFF="-470.9"/>
      <bbk:Obs TIME_PERIOD="1971-04" OBS_VALUE="2.961" BBK_DIFF="-71.1"/>
      <bbk:Obs TIME_PERIOD="1971-03" OBS_VALUE="10.231" BBK_DIFF="507.5"/>
      <bbk:Obs TIME_PERIOD="1971-02" OBS_VALUE="1.684" BBK_DIFF="133.1"/>
      <bbk:Obs TIME_PERIOD="1971-01" OBS_VALUE="-5.089"/>
    </bbk:Series>
  </bbk:DataSet>
</CompactData>
