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      <bbk:Obs TIME_PERIOD="1972-05" OBS_VALUE="20.758" BBK_DIFF="20.5" BBK_DIFF_Y="1.8"/>
      <bbk:Obs TIME_PERIOD="1972-04" OBS_VALUE="17.232" BBK_DIFF="8.2" BBK_DIFF_Y="-16.1"/>
      <bbk:Obs TIME_PERIOD="1972-03" OBS_VALUE="15.925" BBK_DIFF="13.9" BBK_DIFF_Y="-6.0"/>
      <bbk:Obs TIME_PERIOD="1972-02" OBS_VALUE="13.98" BBK_DIFF="-37.1" BBK_DIFF_Y="-21.1"/>
      <bbk:Obs TIME_PERIOD="1972-01" OBS_VALUE="22.223" BBK_DIFF="9.9" BBK_DIFF_Y="9.0"/>
      <bbk:Obs TIME_PERIOD="1971-12" OBS_VALUE="20.223" BBK_DIFF="-14.4"/>
      <bbk:Obs TIME_PERIOD="1971-11" OBS_VALUE="23.618" BBK_DIFF="35.9"/>
      <bbk:Obs TIME_PERIOD="1971-10" OBS_VALUE="17.373" BBK_DIFF="-14.7"/>
      <bbk:Obs TIME_PERIOD="1971-09" OBS_VALUE="20.371" BBK_DIFF="0.5"/>
      <bbk:Obs TIME_PERIOD="1971-08" OBS_VALUE="20.267" BBK_DIFF="-35.2"/>
      <bbk:Obs TIME_PERIOD="1971-07" OBS_VALUE="31.276" BBK_DIFF="81.7"/>
      <bbk:Obs TIME_PERIOD="1971-06" OBS_VALUE="17.211" BBK_DIFF="-15.6"/>
      <bbk:Obs TIME_PERIOD="1971-05" OBS_VALUE="20.388" BBK_DIFF="-0.7"/>
      <bbk:Obs TIME_PERIOD="1971-04" OBS_VALUE="20.532" BBK_DIFF="21.2"/>
      <bbk:Obs TIME_PERIOD="1971-03" OBS_VALUE="16.943" BBK_DIFF="-4.4"/>
      <bbk:Obs TIME_PERIOD="1971-02" OBS_VALUE="17.72" BBK_DIFF="-13.1"/>
      <bbk:Obs TIME_PERIOD="1971-01" OBS_VALUE="20.396"/>
    </bbk:Series>
  </bbk:DataSet>
</CompactData>
