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      <bbk:Obs TIME_PERIOD="1972-11" OBS_VALUE="288.447" BBK_DIFF="11.8" BBK_DIFF_Y="4.2"/>
      <bbk:Obs TIME_PERIOD="1972-10" OBS_VALUE="258.032" BBK_DIFF="-1.0" BBK_DIFF_Y="-3.7"/>
      <bbk:Obs TIME_PERIOD="1972-09" OBS_VALUE="260.768" BBK_DIFF="1.0" BBK_DIFF_Y="4.5"/>
      <bbk:Obs TIME_PERIOD="1972-08" OBS_VALUE="258.313" BBK_DIFF="2.1" BBK_DIFF_Y="7.7"/>
      <bbk:Obs TIME_PERIOD="1972-07" OBS_VALUE="252.912" BBK_DIFF="-5.9" BBK_DIFF_Y="2.4"/>
      <bbk:Obs TIME_PERIOD="1972-06" OBS_VALUE="268.644" BBK_DIFF="5.8" BBK_DIFF_Y="5.4"/>
      <bbk:Obs TIME_PERIOD="1972-05" OBS_VALUE="253.828" BBK_DIFF="10.4" BBK_DIFF_Y="14.1"/>
      <bbk:Obs TIME_PERIOD="1972-04" OBS_VALUE="229.927" BBK_DIFF="-16.6" BBK_DIFF_Y="-13.4"/>
      <bbk:Obs TIME_PERIOD="1972-03" OBS_VALUE="275.547" BBK_DIFF="19.4" BBK_DIFF_Y="6.7"/>
      <bbk:Obs TIME_PERIOD="1972-02" OBS_VALUE="230.818" BBK_DIFF="-8.1" BBK_DIFF_Y="0.3"/>
      <bbk:Obs TIME_PERIOD="1972-01" OBS_VALUE="251.056" BBK_DIFF="-10.2" BBK_DIFF_Y="15.7"/>
      <bbk:Obs TIME_PERIOD="1971-12" OBS_VALUE="279.491" BBK_DIFF="1.0"/>
      <bbk:Obs TIME_PERIOD="1971-11" OBS_VALUE="276.701" BBK_DIFF="3.2"/>
      <bbk:Obs TIME_PERIOD="1971-10" OBS_VALUE="267.999" BBK_DIFF="7.4"/>
      <bbk:Obs TIME_PERIOD="1971-09" OBS_VALUE="249.454" BBK_DIFF="4.0"/>
      <bbk:Obs TIME_PERIOD="1971-08" OBS_VALUE="239.77" BBK_DIFF="-2.9"/>
      <bbk:Obs TIME_PERIOD="1971-07" OBS_VALUE="246.984" BBK_DIFF="-3.1"/>
      <bbk:Obs TIME_PERIOD="1971-06" OBS_VALUE="254.779" BBK_DIFF="14.6"/>
      <bbk:Obs TIME_PERIOD="1971-05" OBS_VALUE="222.406" BBK_DIFF="-16.2"/>
      <bbk:Obs TIME_PERIOD="1971-04" OBS_VALUE="265.556" BBK_DIFF="2.9"/>
      <bbk:Obs TIME_PERIOD="1971-03" OBS_VALUE="258.141" BBK_DIFF="12.1"/>
      <bbk:Obs TIME_PERIOD="1971-02" OBS_VALUE="230.208" BBK_DIFF="6.1"/>
      <bbk:Obs TIME_PERIOD="1971-01" OBS_VALUE="217.039"/>
    </bbk:Series>
  </bbk:DataSet>
</CompactData>
