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      <bbk:Obs TIME_PERIOD="1972-10" OBS_VALUE="88.628" BBK_DIFF="-10.4" BBK_DIFF_Y="102.0"/>
      <bbk:Obs TIME_PERIOD="1972-09" OBS_VALUE="98.899" BBK_DIFF="-34.3" BBK_DIFF_Y="-10.5"/>
      <bbk:Obs TIME_PERIOD="1972-08" OBS_VALUE="150.634" BBK_DIFF="101.6" BBK_DIFF_Y="68.5"/>
      <bbk:Obs TIME_PERIOD="1972-07" OBS_VALUE="74.701" BBK_DIFF="-18.8" BBK_DIFF_Y="-13.9"/>
      <bbk:Obs TIME_PERIOD="1972-06" OBS_VALUE="92.046" BBK_DIFF="3.9" BBK_DIFF_Y="-16.6"/>
      <bbk:Obs TIME_PERIOD="1972-05" OBS_VALUE="88.626" BBK_DIFF="-17.7" BBK_DIFF_Y="17.7"/>
      <bbk:Obs TIME_PERIOD="1972-04" OBS_VALUE="107.638" BBK_DIFF="6.0" BBK_DIFF_Y="34.5"/>
      <bbk:Obs TIME_PERIOD="1972-03" OBS_VALUE="101.564" BBK_DIFF="13.5" BBK_DIFF_Y="-6.4"/>
      <bbk:Obs TIME_PERIOD="1972-02" OBS_VALUE="89.454" BBK_DIFF="-12.3" BBK_DIFF_Y="-10.6"/>
      <bbk:Obs TIME_PERIOD="1972-01" OBS_VALUE="102.054" BBK_DIFF="-5.4" BBK_DIFF_Y="17.8"/>
      <bbk:Obs TIME_PERIOD="1971-12" OBS_VALUE="107.888" BBK_DIFF="40.6"/>
      <bbk:Obs TIME_PERIOD="1971-11" OBS_VALUE="76.74" BBK_DIFF="74.9"/>
      <bbk:Obs TIME_PERIOD="1971-10" OBS_VALUE="43.886" BBK_DIFF="-60.3"/>
      <bbk:Obs TIME_PERIOD="1971-09" OBS_VALUE="110.535" BBK_DIFF="23.7"/>
      <bbk:Obs TIME_PERIOD="1971-08" OBS_VALUE="89.378" BBK_DIFF="3.1"/>
      <bbk:Obs TIME_PERIOD="1971-07" OBS_VALUE="86.721" BBK_DIFF="-21.4"/>
      <bbk:Obs TIME_PERIOD="1971-06" OBS_VALUE="110.348" BBK_DIFF="46.5"/>
      <bbk:Obs TIME_PERIOD="1971-05" OBS_VALUE="75.312" BBK_DIFF="-5.9"/>
      <bbk:Obs TIME_PERIOD="1971-04" OBS_VALUE="80.02" BBK_DIFF="-26.2"/>
      <bbk:Obs TIME_PERIOD="1971-03" OBS_VALUE="108.474" BBK_DIFF="8.4"/>
      <bbk:Obs TIME_PERIOD="1971-02" OBS_VALUE="100.026" BBK_DIFF="15.4"/>
      <bbk:Obs TIME_PERIOD="1971-01" OBS_VALUE="86.651"/>
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  </bbk:DataSet>
</CompactData>
