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      <bbk:Obs TIME_PERIOD="1972-08" OBS_VALUE="0.06" BBK_DIFF="105.8" BBK_DIFF_Y="109.0"/>
      <bbk:Obs TIME_PERIOD="1972-07" OBS_VALUE="-1.027" BBK_DIFF="87.9" BBK_DIFF_Y="-169.0"/>
      <bbk:Obs TIME_PERIOD="1972-06" OBS_VALUE="-8.518" BBK_DIFF="-215.6" BBK_DIFF_Y="-1003.3"/>
      <bbk:Obs TIME_PERIOD="1972-05" OBS_VALUE="7.37" BBK_DIFF="853.4" BBK_DIFF_Y="338.8"/>
      <bbk:Obs TIME_PERIOD="1972-04" OBS_VALUE="0.773" BBK_DIFF="284.0" BBK_DIFF_Y="199.4"/>
      <bbk:Obs TIME_PERIOD="1972-03" OBS_VALUE="-0.42" BBK_DIFF="-123.6" BBK_DIFF_Y="83.9"/>
      <bbk:Obs TIME_PERIOD="1972-02" OBS_VALUE="1.783" BBK_DIFF="119.1" BBK_DIFF_Y="-55.2"/>
      <bbk:Obs TIME_PERIOD="1972-01" OBS_VALUE="-9.332" BBK_DIFF="-1225.7" BBK_DIFF_Y="-14039.4"/>
      <bbk:Obs TIME_PERIOD="1971-12" OBS_VALUE="0.829" BBK_DIFF="-61.9"/>
      <bbk:Obs TIME_PERIOD="1971-11" OBS_VALUE="2.174" BBK_DIFF="657.5"/>
      <bbk:Obs TIME_PERIOD="1971-10" OBS_VALUE="0.287" BBK_DIFF="197.0"/>
      <bbk:Obs TIME_PERIOD="1971-09" OBS_VALUE="-0.296" BBK_DIFF="55.6"/>
      <bbk:Obs TIME_PERIOD="1971-08" OBS_VALUE="-0.667" BBK_DIFF="-144.8"/>
      <bbk:Obs TIME_PERIOD="1971-07" OBS_VALUE="1.489" BBK_DIFF="57.9"/>
      <bbk:Obs TIME_PERIOD="1971-06" OBS_VALUE="0.943" BBK_DIFF="130.6"/>
      <bbk:Obs TIME_PERIOD="1971-05" OBS_VALUE="-3.086" BBK_DIFF="-296.7"/>
      <bbk:Obs TIME_PERIOD="1971-04" OBS_VALUE="-0.778" BBK_DIFF="70.3"/>
      <bbk:Obs TIME_PERIOD="1971-03" OBS_VALUE="-2.616" BBK_DIFF="-165.7"/>
      <bbk:Obs TIME_PERIOD="1971-02" OBS_VALUE="3.981" BBK_DIFF="6131.8"/>
      <bbk:Obs TIME_PERIOD="1971-01" OBS_VALUE="-0.066"/>
    </bbk:Series>
  </bbk:DataSet>
</CompactData>
