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      <bbk:Obs TIME_PERIOD="1972-05" OBS_VALUE="2.387" BBK_DIFF="-4.6" BBK_DIFF_Y="195.1"/>
      <bbk:Obs TIME_PERIOD="1972-04" OBS_VALUE="2.503" BBK_DIFF="2.8" BBK_DIFF_Y="279.2"/>
      <bbk:Obs TIME_PERIOD="1972-03" OBS_VALUE="2.436" BBK_DIFF="105.1" BBK_DIFF_Y="253.6"/>
      <bbk:Obs TIME_PERIOD="1972-02" OBS_VALUE="1.188" BBK_DIFF="23.0" BBK_DIFF_Y="80.5"/>
      <bbk:Obs TIME_PERIOD="1972-01" OBS_VALUE="0.966" BBK_DIFF="-10.1" BBK_DIFF_Y="32.9"/>
      <bbk:Obs TIME_PERIOD="1971-12" OBS_VALUE="1.074" BBK_DIFF="3.2"/>
      <bbk:Obs TIME_PERIOD="1971-11" OBS_VALUE="1.041" BBK_DIFF="0.9"/>
      <bbk:Obs TIME_PERIOD="1971-10" OBS_VALUE="1.032" BBK_DIFF="5.1"/>
      <bbk:Obs TIME_PERIOD="1971-09" OBS_VALUE="0.982" BBK_DIFF="0.6"/>
      <bbk:Obs TIME_PERIOD="1971-08" OBS_VALUE="0.976" BBK_DIFF="-3.8"/>
      <bbk:Obs TIME_PERIOD="1971-07" OBS_VALUE="1.015" BBK_DIFF="2.1"/>
      <bbk:Obs TIME_PERIOD="1971-06" OBS_VALUE="0.994" BBK_DIFF="22.9"/>
      <bbk:Obs TIME_PERIOD="1971-05" OBS_VALUE="0.809" BBK_DIFF="22.6"/>
      <bbk:Obs TIME_PERIOD="1971-04" OBS_VALUE="0.66" BBK_DIFF="-4.2"/>
      <bbk:Obs TIME_PERIOD="1971-03" OBS_VALUE="0.689" BBK_DIFF="4.7"/>
      <bbk:Obs TIME_PERIOD="1971-02" OBS_VALUE="0.658" BBK_DIFF="-9.5"/>
      <bbk:Obs TIME_PERIOD="1971-01" OBS_VALUE="0.727"/>
    </bbk:Series>
  </bbk:DataSet>
</CompactData>
