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      <bbk:Obs TIME_PERIOD="1972-10" OBS_VALUE="138.237" BBK_DIFF="-8.2" BBK_DIFF_Y="-0.1"/>
      <bbk:Obs TIME_PERIOD="1972-09" OBS_VALUE="150.528" BBK_DIFF="-30.5" BBK_DIFF_Y="27.6"/>
      <bbk:Obs TIME_PERIOD="1972-08" OBS_VALUE="216.505" BBK_DIFF="28.5" BBK_DIFF_Y="61.3"/>
      <bbk:Obs TIME_PERIOD="1972-07" OBS_VALUE="168.485" BBK_DIFF="43.9" BBK_DIFF_Y="-13.7"/>
      <bbk:Obs TIME_PERIOD="1972-06" OBS_VALUE="117.046" BBK_DIFF="-21.9" BBK_DIFF_Y="-3.7"/>
      <bbk:Obs TIME_PERIOD="1972-05" OBS_VALUE="149.937" BBK_DIFF="-7.5" BBK_DIFF_Y="0.6"/>
      <bbk:Obs TIME_PERIOD="1972-04" OBS_VALUE="162.172" BBK_DIFF="5.2" BBK_DIFF_Y="16.0"/>
      <bbk:Obs TIME_PERIOD="1972-03" OBS_VALUE="154.184" BBK_DIFF="47.5" BBK_DIFF_Y="3.2"/>
      <bbk:Obs TIME_PERIOD="1972-02" OBS_VALUE="104.513" BBK_DIFF="-27.8" BBK_DIFF_Y="-30.4"/>
      <bbk:Obs TIME_PERIOD="1972-01" OBS_VALUE="144.854" BBK_DIFF="-21.2" BBK_DIFF_Y="-8.5"/>
      <bbk:Obs TIME_PERIOD="1971-12" OBS_VALUE="183.812" BBK_DIFF="47.7"/>
      <bbk:Obs TIME_PERIOD="1971-11" OBS_VALUE="124.487" BBK_DIFF="-10.0"/>
      <bbk:Obs TIME_PERIOD="1971-10" OBS_VALUE="138.327" BBK_DIFF="17.2"/>
      <bbk:Obs TIME_PERIOD="1971-09" OBS_VALUE="117.998" BBK_DIFF="-12.1"/>
      <bbk:Obs TIME_PERIOD="1971-08" OBS_VALUE="134.187" BBK_DIFF="-31.3"/>
      <bbk:Obs TIME_PERIOD="1971-07" OBS_VALUE="195.34" BBK_DIFF="60.8"/>
      <bbk:Obs TIME_PERIOD="1971-06" OBS_VALUE="121.504" BBK_DIFF="-18.4"/>
      <bbk:Obs TIME_PERIOD="1971-05" OBS_VALUE="148.975" BBK_DIFF="6.6"/>
      <bbk:Obs TIME_PERIOD="1971-04" OBS_VALUE="139.755" BBK_DIFF="-6.5"/>
      <bbk:Obs TIME_PERIOD="1971-03" OBS_VALUE="149.405" BBK_DIFF="-0.4"/>
      <bbk:Obs TIME_PERIOD="1971-02" OBS_VALUE="150.065" BBK_DIFF="-5.2"/>
      <bbk:Obs TIME_PERIOD="1971-01" OBS_VALUE="158.301"/>
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  </bbk:DataSet>
</CompactData>
