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      <bbk:Obs TIME_PERIOD="1972-07" OBS_VALUE="216.521" BBK_DIFF="8.7" BBK_DIFF_Y="25.0"/>
      <bbk:Obs TIME_PERIOD="1972-06" OBS_VALUE="199.143" BBK_DIFF="-12.3" BBK_DIFF_Y="-8.2"/>
      <bbk:Obs TIME_PERIOD="1972-05" OBS_VALUE="227.116" BBK_DIFF="2.9" BBK_DIFF_Y="6.9"/>
      <bbk:Obs TIME_PERIOD="1972-04" OBS_VALUE="220.631" BBK_DIFF="-5.3" BBK_DIFF_Y="4.8"/>
      <bbk:Obs TIME_PERIOD="1972-03" OBS_VALUE="233.08" BBK_DIFF="-7.7" BBK_DIFF_Y="-4.2"/>
      <bbk:Obs TIME_PERIOD="1972-02" OBS_VALUE="252.658" BBK_DIFF="9.3" BBK_DIFF_Y="33.0"/>
      <bbk:Obs TIME_PERIOD="1972-01" OBS_VALUE="231.246" BBK_DIFF="23.0" BBK_DIFF_Y="34.8"/>
      <bbk:Obs TIME_PERIOD="1971-12" OBS_VALUE="188.051" BBK_DIFF="-13.6"/>
      <bbk:Obs TIME_PERIOD="1971-11" OBS_VALUE="217.719" BBK_DIFF="-8.6"/>
      <bbk:Obs TIME_PERIOD="1971-10" OBS_VALUE="238.282" BBK_DIFF="41.0"/>
      <bbk:Obs TIME_PERIOD="1971-09" OBS_VALUE="168.988" BBK_DIFF="-18.0"/>
      <bbk:Obs TIME_PERIOD="1971-08" OBS_VALUE="206.093" BBK_DIFF="19.0"/>
      <bbk:Obs TIME_PERIOD="1971-07" OBS_VALUE="173.155" BBK_DIFF="-20.2"/>
      <bbk:Obs TIME_PERIOD="1971-06" OBS_VALUE="216.992" BBK_DIFF="2.2"/>
      <bbk:Obs TIME_PERIOD="1971-05" OBS_VALUE="212.414" BBK_DIFF="0.9"/>
      <bbk:Obs TIME_PERIOD="1971-04" OBS_VALUE="210.469" BBK_DIFF="-13.5"/>
      <bbk:Obs TIME_PERIOD="1971-03" OBS_VALUE="243.354" BBK_DIFF="28.1"/>
      <bbk:Obs TIME_PERIOD="1971-02" OBS_VALUE="189.969" BBK_DIFF="10.8"/>
      <bbk:Obs TIME_PERIOD="1971-01" OBS_VALUE="171.519"/>
    </bbk:Series>
  </bbk:DataSet>
</CompactData>
