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      <bbk:Obs TIME_PERIOD="1972-08" OBS_VALUE="174.035" BBK_DIFF="-22.1" BBK_DIFF_Y="100.2"/>
      <bbk:Obs TIME_PERIOD="1972-07" OBS_VALUE="223.405" BBK_DIFF="4.2" BBK_DIFF_Y="-5.4"/>
      <bbk:Obs TIME_PERIOD="1972-06" OBS_VALUE="214.339" BBK_DIFF="2.0" BBK_DIFF_Y="-50.2"/>
      <bbk:Obs TIME_PERIOD="1972-05" OBS_VALUE="210.158" BBK_DIFF="99.0" BBK_DIFF_Y="653.7"/>
      <bbk:Obs TIME_PERIOD="1972-04" OBS_VALUE="105.63" BBK_DIFF="-68.0" BBK_DIFF_Y="-51.4"/>
      <bbk:Obs TIME_PERIOD="1972-03" OBS_VALUE="330.12" BBK_DIFF="87.9" BBK_DIFF_Y="-19.5"/>
      <bbk:Obs TIME_PERIOD="1972-02" OBS_VALUE="175.734" BBK_DIFF="236.7" BBK_DIFF_Y="34.4"/>
      <bbk:Obs TIME_PERIOD="1972-01" OBS_VALUE="-128.545" BBK_DIFF="-120.7" BBK_DIFF_Y="41.0"/>
      <bbk:Obs TIME_PERIOD="1971-12" OBS_VALUE="621.061" BBK_DIFF="312.3"/>
      <bbk:Obs TIME_PERIOD="1971-11" OBS_VALUE="150.642" BBK_DIFF="9.3"/>
      <bbk:Obs TIME_PERIOD="1971-10" OBS_VALUE="137.841" BBK_DIFF="189.3"/>
      <bbk:Obs TIME_PERIOD="1971-09" OBS_VALUE="-154.431" BBK_DIFF="-277.6"/>
      <bbk:Obs TIME_PERIOD="1971-08" OBS_VALUE="86.936" BBK_DIFF="-63.2"/>
      <bbk:Obs TIME_PERIOD="1971-07" OBS_VALUE="236.067" BBK_DIFF="-45.1"/>
      <bbk:Obs TIME_PERIOD="1971-06" OBS_VALUE="430.091" BBK_DIFF="1233.2"/>
      <bbk:Obs TIME_PERIOD="1971-05" OBS_VALUE="-37.955" BBK_DIFF="-117.5"/>
      <bbk:Obs TIME_PERIOD="1971-04" OBS_VALUE="217.172" BBK_DIFF="-47.1"/>
      <bbk:Obs TIME_PERIOD="1971-03" OBS_VALUE="410.223" BBK_DIFF="213.8"/>
      <bbk:Obs TIME_PERIOD="1971-02" OBS_VALUE="130.707" BBK_DIFF="160.0"/>
      <bbk:Obs TIME_PERIOD="1971-01" OBS_VALUE="-218.007"/>
    </bbk:Series>
  </bbk:DataSet>
</CompactData>
