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      <bbk:Obs TIME_PERIOD="1972-08" OBS_VALUE="118.469" BBK_DIFF="-10.2" BBK_DIFF_Y="28.1"/>
      <bbk:Obs TIME_PERIOD="1972-07" OBS_VALUE="131.949" BBK_DIFF="16.1" BBK_DIFF_Y="12.6"/>
      <bbk:Obs TIME_PERIOD="1972-06" OBS_VALUE="113.689" BBK_DIFF="-9.6" BBK_DIFF_Y="4.3"/>
      <bbk:Obs TIME_PERIOD="1972-05" OBS_VALUE="125.751" BBK_DIFF="5.2" BBK_DIFF_Y="-4.2"/>
      <bbk:Obs TIME_PERIOD="1972-04" OBS_VALUE="119.557" BBK_DIFF="15.9" BBK_DIFF_Y="-3.3"/>
      <bbk:Obs TIME_PERIOD="1972-03" OBS_VALUE="103.163" BBK_DIFF="-7.4" BBK_DIFF_Y="-14.7"/>
      <bbk:Obs TIME_PERIOD="1972-02" OBS_VALUE="111.368" BBK_DIFF="7.8" BBK_DIFF_Y="-0.5"/>
      <bbk:Obs TIME_PERIOD="1972-01" OBS_VALUE="103.266" BBK_DIFF="-3.1" BBK_DIFF_Y="-0.5"/>
      <bbk:Obs TIME_PERIOD="1971-12" OBS_VALUE="106.615" BBK_DIFF="-6.5"/>
      <bbk:Obs TIME_PERIOD="1971-11" OBS_VALUE="113.969" BBK_DIFF="-17.9"/>
      <bbk:Obs TIME_PERIOD="1971-10" OBS_VALUE="138.84" BBK_DIFF="38.6"/>
      <bbk:Obs TIME_PERIOD="1971-09" OBS_VALUE="100.203" BBK_DIFF="8.3"/>
      <bbk:Obs TIME_PERIOD="1971-08" OBS_VALUE="92.507" BBK_DIFF="-21.0"/>
      <bbk:Obs TIME_PERIOD="1971-07" OBS_VALUE="117.133" BBK_DIFF="7.4"/>
      <bbk:Obs TIME_PERIOD="1971-06" OBS_VALUE="109.037" BBK_DIFF="-16.9"/>
      <bbk:Obs TIME_PERIOD="1971-05" OBS_VALUE="131.261" BBK_DIFF="6.1"/>
      <bbk:Obs TIME_PERIOD="1971-04" OBS_VALUE="123.667" BBK_DIFF="2.2"/>
      <bbk:Obs TIME_PERIOD="1971-03" OBS_VALUE="120.953" BBK_DIFF="8.1"/>
      <bbk:Obs TIME_PERIOD="1971-02" OBS_VALUE="111.928" BBK_DIFF="7.8"/>
      <bbk:Obs TIME_PERIOD="1971-01" OBS_VALUE="103.787"/>
    </bbk:Series>
  </bbk:DataSet>
</CompactData>
