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      <bbk:Obs TIME_PERIOD="1972-06" OBS_VALUE="0.567" BBK_DIFF="-86.9" BBK_DIFF_Y="205.6"/>
      <bbk:Obs TIME_PERIOD="1972-05" OBS_VALUE="4.321" BBK_DIFF="3080.0" BBK_DIFF_Y="406.7"/>
      <bbk:Obs TIME_PERIOD="1972-04" OBS_VALUE="-0.145" BBK_DIFF="-160.9" BBK_DIFF_Y="-383.3"/>
      <bbk:Obs TIME_PERIOD="1972-03" OBS_VALUE="0.238" BBK_DIFF="981.8" BBK_DIFF_Y="-76.4"/>
      <bbk:Obs TIME_PERIOD="1972-02" OBS_VALUE="0.022" BBK_DIFF="118.0" BBK_DIFF_Y="-76.8"/>
      <bbk:Obs TIME_PERIOD="1972-01" OBS_VALUE="-0.122" BBK_DIFF="-106.8" BBK_DIFF_Y="52.3"/>
      <bbk:Obs TIME_PERIOD="1971-12" OBS_VALUE="1.784" BBK_DIFF="1783.0"/>
      <bbk:Obs TIME_PERIOD="1971-11" OBS_VALUE="-0.106" BBK_DIFF="40.4"/>
      <bbk:Obs TIME_PERIOD="1971-10" OBS_VALUE="-0.178" BBK_DIFF="-186.0"/>
      <bbk:Obs TIME_PERIOD="1971-09" OBS_VALUE="0.207" BBK_DIFF="143.1"/>
      <bbk:Obs TIME_PERIOD="1971-08" OBS_VALUE="-0.48" BBK_DIFF="-5433.3"/>
      <bbk:Obs TIME_PERIOD="1971-07" OBS_VALUE="0.009" BBK_DIFF="101.7"/>
      <bbk:Obs TIME_PERIOD="1971-06" OBS_VALUE="-0.537" BBK_DIFF="61.9"/>
      <bbk:Obs TIME_PERIOD="1971-05" OBS_VALUE="-1.409" BBK_DIFF="-4596.7"/>
      <bbk:Obs TIME_PERIOD="1971-04" OBS_VALUE="-0.03" BBK_DIFF="-103.0"/>
      <bbk:Obs TIME_PERIOD="1971-03" OBS_VALUE="1.007" BBK_DIFF="960.0"/>
      <bbk:Obs TIME_PERIOD="1971-02" OBS_VALUE="0.095" BBK_DIFF="137.1"/>
      <bbk:Obs TIME_PERIOD="1971-01" OBS_VALUE="-0.256"/>
    </bbk:Series>
  </bbk:DataSet>
</CompactData>
