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      <bbk:Obs TIME_PERIOD="1972-10" OBS_VALUE="190.98" BBK_DIFF="3.9" BBK_DIFF_Y="34.4"/>
      <bbk:Obs TIME_PERIOD="1972-09" OBS_VALUE="183.851" BBK_DIFF="4.5" BBK_DIFF_Y="31.6"/>
      <bbk:Obs TIME_PERIOD="1972-08" OBS_VALUE="175.938" BBK_DIFF="5.5" BBK_DIFF_Y="25.1"/>
      <bbk:Obs TIME_PERIOD="1972-07" OBS_VALUE="166.783" BBK_DIFF="-4.1" BBK_DIFF_Y="18.8"/>
      <bbk:Obs TIME_PERIOD="1972-06" OBS_VALUE="173.898" BBK_DIFF="4.6" BBK_DIFF_Y="31.6"/>
      <bbk:Obs TIME_PERIOD="1972-05" OBS_VALUE="166.209" BBK_DIFF="3.1" BBK_DIFF_Y="27.6"/>
      <bbk:Obs TIME_PERIOD="1972-04" OBS_VALUE="161.21" BBK_DIFF="3.7" BBK_DIFF_Y="24.3"/>
      <bbk:Obs TIME_PERIOD="1972-03" OBS_VALUE="155.46" BBK_DIFF="3.4" BBK_DIFF_Y="21.0"/>
      <bbk:Obs TIME_PERIOD="1972-02" OBS_VALUE="150.358" BBK_DIFF="-2.5" BBK_DIFF_Y="15.7"/>
      <bbk:Obs TIME_PERIOD="1972-01" OBS_VALUE="154.136" BBK_DIFF="5.7" BBK_DIFF_Y="25.0"/>
      <bbk:Obs TIME_PERIOD="1971-12" OBS_VALUE="145.878" BBK_DIFF="0.7"/>
      <bbk:Obs TIME_PERIOD="1971-11" OBS_VALUE="144.87" BBK_DIFF="2.0"/>
      <bbk:Obs TIME_PERIOD="1971-10" OBS_VALUE="142.079" BBK_DIFF="1.7"/>
      <bbk:Obs TIME_PERIOD="1971-09" OBS_VALUE="139.676" BBK_DIFF="-0.6"/>
      <bbk:Obs TIME_PERIOD="1971-08" OBS_VALUE="140.584" BBK_DIFF="0.1"/>
      <bbk:Obs TIME_PERIOD="1971-07" OBS_VALUE="140.428" BBK_DIFF="6.2"/>
      <bbk:Obs TIME_PERIOD="1971-06" OBS_VALUE="132.177" BBK_DIFF="1.5"/>
      <bbk:Obs TIME_PERIOD="1971-05" OBS_VALUE="130.229" BBK_DIFF="0.4"/>
      <bbk:Obs TIME_PERIOD="1971-04" OBS_VALUE="129.687" BBK_DIFF="1.0"/>
      <bbk:Obs TIME_PERIOD="1971-03" OBS_VALUE="128.439" BBK_DIFF="-1.1"/>
      <bbk:Obs TIME_PERIOD="1971-02" OBS_VALUE="129.908" BBK_DIFF="5.3"/>
      <bbk:Obs TIME_PERIOD="1971-01" OBS_VALUE="123.316"/>
    </bbk:Series>
  </bbk:DataSet>
</CompactData>
