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      <bbk:Obs TIME_PERIOD="1972-10" OBS_VALUE="28.254" BBK_DIFF="-19.8" BBK_DIFF_Y="3300.0"/>
      <bbk:Obs TIME_PERIOD="1972-09" OBS_VALUE="35.21" BBK_DIFF="-52.1" BBK_DIFF_Y="1651.8"/>
      <bbk:Obs TIME_PERIOD="1972-08" OBS_VALUE="73.537" BBK_DIFF="-41.3" BBK_DIFF_Y="1494.8"/>
      <bbk:Obs TIME_PERIOD="1972-07" OBS_VALUE="125.306" BBK_DIFF="-39.4" BBK_DIFF_Y="150.9"/>
      <bbk:Obs TIME_PERIOD="1972-06" OBS_VALUE="206.839" BBK_DIFF="82.9" BBK_DIFF_Y="2060.4"/>
      <bbk:Obs TIME_PERIOD="1972-05" OBS_VALUE="113.096" BBK_DIFF="-18.2" BBK_DIFF_Y="350.4"/>
      <bbk:Obs TIME_PERIOD="1972-04" OBS_VALUE="138.267" BBK_DIFF="19.1" BBK_DIFF_Y="363.3"/>
      <bbk:Obs TIME_PERIOD="1972-03" OBS_VALUE="116.092" BBK_DIFF="-5.3" BBK_DIFF_Y="488.0"/>
      <bbk:Obs TIME_PERIOD="1972-02" OBS_VALUE="122.534" BBK_DIFF="173.0" BBK_DIFF_Y="779.2"/>
      <bbk:Obs TIME_PERIOD="1972-01" OBS_VALUE="44.879" BBK_DIFF="123.0" BBK_DIFF_Y="-16.8"/>
      <bbk:Obs TIME_PERIOD="1971-12" OBS_VALUE="20.126" BBK_DIFF="-62.1"/>
      <bbk:Obs TIME_PERIOD="1971-11" OBS_VALUE="53.091" BBK_DIFF="6288.8"/>
      <bbk:Obs TIME_PERIOD="1971-10" OBS_VALUE="0.831" BBK_DIFF="136.6"/>
      <bbk:Obs TIME_PERIOD="1971-09" OBS_VALUE="-2.269" BBK_DIFF="-149.2"/>
      <bbk:Obs TIME_PERIOD="1971-08" OBS_VALUE="4.611" BBK_DIFF="-90.8"/>
      <bbk:Obs TIME_PERIOD="1971-07" OBS_VALUE="49.95" BBK_DIFF="421.7"/>
      <bbk:Obs TIME_PERIOD="1971-06" OBS_VALUE="9.574" BBK_DIFF="121.2"/>
      <bbk:Obs TIME_PERIOD="1971-05" OBS_VALUE="-45.158" BBK_DIFF="-251.3"/>
      <bbk:Obs TIME_PERIOD="1971-04" OBS_VALUE="29.844" BBK_DIFF="51.2"/>
      <bbk:Obs TIME_PERIOD="1971-03" OBS_VALUE="19.744" BBK_DIFF="41.7"/>
      <bbk:Obs TIME_PERIOD="1971-02" OBS_VALUE="13.937" BBK_DIFF="-74.2"/>
      <bbk:Obs TIME_PERIOD="1971-01" OBS_VALUE="53.963"/>
    </bbk:Series>
  </bbk:DataSet>
</CompactData>
