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      <bbk:Obs TIME_PERIOD="1972-11" OBS_VALUE="83.718" BBK_DIFF="2.9" BBK_DIFF_Y="18.9"/>
      <bbk:Obs TIME_PERIOD="1972-10" OBS_VALUE="81.345" BBK_DIFF="3.4" BBK_DIFF_Y="15.3"/>
      <bbk:Obs TIME_PERIOD="1972-09" OBS_VALUE="78.692" BBK_DIFF="2.0" BBK_DIFF_Y="10.7"/>
      <bbk:Obs TIME_PERIOD="1972-08" OBS_VALUE="77.179" BBK_DIFF="1.5" BBK_DIFF_Y="8.2"/>
      <bbk:Obs TIME_PERIOD="1972-07" OBS_VALUE="76.019" BBK_DIFF="2.6" BBK_DIFF_Y="5.5"/>
      <bbk:Obs TIME_PERIOD="1972-06" OBS_VALUE="74.1" BBK_DIFF="3.1" BBK_DIFF_Y="2.9"/>
      <bbk:Obs TIME_PERIOD="1972-05" OBS_VALUE="71.854" BBK_DIFF="1.0" BBK_DIFF_Y="-0.4"/>
      <bbk:Obs TIME_PERIOD="1972-04" OBS_VALUE="71.133" BBK_DIFF="1.5" BBK_DIFF_Y="-1.7"/>
      <bbk:Obs TIME_PERIOD="1972-03" OBS_VALUE="70.071" BBK_DIFF="0.9" BBK_DIFF_Y="-3.6"/>
      <bbk:Obs TIME_PERIOD="1972-02" OBS_VALUE="69.418" BBK_DIFF="-1.5" BBK_DIFF_Y="-4.9"/>
      <bbk:Obs TIME_PERIOD="1972-01" OBS_VALUE="70.445" BBK_DIFF="0.7" BBK_DIFF_Y="-2.4"/>
      <bbk:Obs TIME_PERIOD="1971-12" OBS_VALUE="69.944" BBK_DIFF="-0.6"/>
      <bbk:Obs TIME_PERIOD="1971-11" OBS_VALUE="70.388" BBK_DIFF="-0.2"/>
      <bbk:Obs TIME_PERIOD="1971-10" OBS_VALUE="70.522" BBK_DIFF="-0.8"/>
      <bbk:Obs TIME_PERIOD="1971-09" OBS_VALUE="71.112" BBK_DIFF="-0.3"/>
      <bbk:Obs TIME_PERIOD="1971-08" OBS_VALUE="71.3" BBK_DIFF="-1.1"/>
      <bbk:Obs TIME_PERIOD="1971-07" OBS_VALUE="72.075" BBK_DIFF="0.1"/>
      <bbk:Obs TIME_PERIOD="1971-06" OBS_VALUE="72.01" BBK_DIFF="-0.2"/>
      <bbk:Obs TIME_PERIOD="1971-05" OBS_VALUE="72.178" BBK_DIFF="-0.3"/>
      <bbk:Obs TIME_PERIOD="1971-04" OBS_VALUE="72.377" BBK_DIFF="-0.4"/>
      <bbk:Obs TIME_PERIOD="1971-03" OBS_VALUE="72.652" BBK_DIFF="-0.4"/>
      <bbk:Obs TIME_PERIOD="1971-02" OBS_VALUE="72.973" BBK_DIFF="1.1"/>
      <bbk:Obs TIME_PERIOD="1971-01" OBS_VALUE="72.195"/>
    </bbk:Series>
  </bbk:DataSet>
</CompactData>
