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      <bbk:Obs TIME_PERIOD="1972-06" OBS_VALUE="-1.412" BBK_DIFF="-109.0" BBK_DIFF_Y="-145.6"/>
      <bbk:Obs TIME_PERIOD="1972-05" OBS_VALUE="15.674" BBK_DIFF="1282.2" BBK_DIFF_Y="-23.5"/>
      <bbk:Obs TIME_PERIOD="1972-04" OBS_VALUE="1.134" BBK_DIFF="-60.5" BBK_DIFF_Y="-62.5"/>
      <bbk:Obs TIME_PERIOD="1972-03" OBS_VALUE="2.87" BBK_DIFF="907.0" BBK_DIFF_Y="-40.6"/>
      <bbk:Obs TIME_PERIOD="1972-02" OBS_VALUE="0.285" BBK_DIFF="-92.2" BBK_DIFF_Y="-91.0"/>
      <bbk:Obs TIME_PERIOD="1972-01" OBS_VALUE="3.677" BBK_DIFF="-55.1" BBK_DIFF_Y="67.0"/>
      <bbk:Obs TIME_PERIOD="1971-12" OBS_VALUE="8.185" BBK_DIFF="818.6"/>
      <bbk:Obs TIME_PERIOD="1971-11" OBS_VALUE="-1.139" BBK_DIFF="-97.7"/>
      <bbk:Obs TIME_PERIOD="1971-10" OBS_VALUE="-0.576" BBK_DIFF="-264.6"/>
      <bbk:Obs TIME_PERIOD="1971-09" OBS_VALUE="-0.158" BBK_DIFF="-106.3"/>
      <bbk:Obs TIME_PERIOD="1971-08" OBS_VALUE="2.518" BBK_DIFF="29.8"/>
      <bbk:Obs TIME_PERIOD="1971-07" OBS_VALUE="1.94" BBK_DIFF="-37.3"/>
      <bbk:Obs TIME_PERIOD="1971-06" OBS_VALUE="3.094" BBK_DIFF="-84.9"/>
      <bbk:Obs TIME_PERIOD="1971-05" OBS_VALUE="20.489" BBK_DIFF="576.7"/>
      <bbk:Obs TIME_PERIOD="1971-04" OBS_VALUE="3.028" BBK_DIFF="-37.4"/>
      <bbk:Obs TIME_PERIOD="1971-03" OBS_VALUE="4.835" BBK_DIFF="53.2"/>
      <bbk:Obs TIME_PERIOD="1971-02" OBS_VALUE="3.157" BBK_DIFF="43.4"/>
      <bbk:Obs TIME_PERIOD="1971-01" OBS_VALUE="2.202"/>
    </bbk:Series>
  </bbk:DataSet>
</CompactData>
