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      <bbk:Obs TIME_PERIOD="1972-11" OBS_VALUE="243.765" BBK_DIFF="-5.7" BBK_DIFF_Y="16.1"/>
      <bbk:Obs TIME_PERIOD="1972-10" OBS_VALUE="258.517" BBK_DIFF="35.2" BBK_DIFF_Y="23.7"/>
      <bbk:Obs TIME_PERIOD="1972-09" OBS_VALUE="191.154" BBK_DIFF="-2.9" BBK_DIFF_Y="5.6"/>
      <bbk:Obs TIME_PERIOD="1972-08" OBS_VALUE="196.891" BBK_DIFF="15.7" BBK_DIFF_Y="10.2"/>
      <bbk:Obs TIME_PERIOD="1972-07" OBS_VALUE="170.192" BBK_DIFF="-11.9" BBK_DIFF_Y="-9.3"/>
      <bbk:Obs TIME_PERIOD="1972-06" OBS_VALUE="193.169" BBK_DIFF="-6.6" BBK_DIFF_Y="22.7"/>
      <bbk:Obs TIME_PERIOD="1972-05" OBS_VALUE="206.798" BBK_DIFF="3.9" BBK_DIFF_Y="5.3"/>
      <bbk:Obs TIME_PERIOD="1972-04" OBS_VALUE="198.952" BBK_DIFF="-9.7" BBK_DIFF_Y="0.3"/>
      <bbk:Obs TIME_PERIOD="1972-03" OBS_VALUE="220.357" BBK_DIFF="6.1" BBK_DIFF_Y="6.2"/>
      <bbk:Obs TIME_PERIOD="1972-02" OBS_VALUE="207.744" BBK_DIFF="15.7" BBK_DIFF_Y="10.0"/>
      <bbk:Obs TIME_PERIOD="1972-01" OBS_VALUE="179.619" BBK_DIFF="-15.8" BBK_DIFF_Y="4.5"/>
      <bbk:Obs TIME_PERIOD="1971-12" OBS_VALUE="213.407" BBK_DIFF="1.6"/>
      <bbk:Obs TIME_PERIOD="1971-11" OBS_VALUE="210.017" BBK_DIFF="0.5"/>
      <bbk:Obs TIME_PERIOD="1971-10" OBS_VALUE="209.046" BBK_DIFF="15.5"/>
      <bbk:Obs TIME_PERIOD="1971-09" OBS_VALUE="180.981" BBK_DIFF="1.3"/>
      <bbk:Obs TIME_PERIOD="1971-08" OBS_VALUE="178.725" BBK_DIFF="-4.7"/>
      <bbk:Obs TIME_PERIOD="1971-07" OBS_VALUE="187.553" BBK_DIFF="19.2"/>
      <bbk:Obs TIME_PERIOD="1971-06" OBS_VALUE="157.408" BBK_DIFF="-19.9"/>
      <bbk:Obs TIME_PERIOD="1971-05" OBS_VALUE="196.478" BBK_DIFF="-0.9"/>
      <bbk:Obs TIME_PERIOD="1971-04" OBS_VALUE="198.297" BBK_DIFF="-4.4"/>
      <bbk:Obs TIME_PERIOD="1971-03" OBS_VALUE="207.422" BBK_DIFF="9.8"/>
      <bbk:Obs TIME_PERIOD="1971-02" OBS_VALUE="188.899" BBK_DIFF="9.9"/>
      <bbk:Obs TIME_PERIOD="1971-01" OBS_VALUE="171.932"/>
    </bbk:Series>
  </bbk:DataSet>
</CompactData>
