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      <bbk:Obs TIME_PERIOD="1972-08" OBS_VALUE="5.299" BBK_DIFF="5597.8" BBK_DIFF_Y="-25.0"/>
      <bbk:Obs TIME_PERIOD="1972-07" OBS_VALUE="0.093" BBK_DIFF="100.6" BBK_DIFF_Y="201.1"/>
      <bbk:Obs TIME_PERIOD="1972-06" OBS_VALUE="-16.092" BBK_DIFF="-158.6" BBK_DIFF_Y="-493.1"/>
      <bbk:Obs TIME_PERIOD="1972-05" OBS_VALUE="27.467" BBK_DIFF="1557.6" BBK_DIFF_Y="8989.0"/>
      <bbk:Obs TIME_PERIOD="1972-04" OBS_VALUE="1.657" BBK_DIFF="-96.5" BBK_DIFF_Y="-49.7"/>
      <bbk:Obs TIME_PERIOD="1972-03" OBS_VALUE="47.746" BBK_DIFF="2972.8" BBK_DIFF_Y="220.0"/>
      <bbk:Obs TIME_PERIOD="1972-02" OBS_VALUE="-1.662" BBK_DIFF="-107.2" BBK_DIFF_Y="-134.2"/>
      <bbk:Obs TIME_PERIOD="1972-01" OBS_VALUE="23.024" BBK_DIFF="228.4" BBK_DIFF_Y="311.4"/>
      <bbk:Obs TIME_PERIOD="1971-12" OBS_VALUE="-17.925" BBK_DIFF="-219.4"/>
      <bbk:Obs TIME_PERIOD="1971-11" OBS_VALUE="15.009" BBK_DIFF="2872.1"/>
      <bbk:Obs TIME_PERIOD="1971-10" OBS_VALUE="0.505" BBK_DIFF="-96.8"/>
      <bbk:Obs TIME_PERIOD="1971-09" OBS_VALUE="15.946" BBK_DIFF="125.6"/>
      <bbk:Obs TIME_PERIOD="1971-08" OBS_VALUE="7.067" BBK_DIFF="7781.5"/>
      <bbk:Obs TIME_PERIOD="1971-07" OBS_VALUE="-0.092" BBK_DIFF="-102.2"/>
      <bbk:Obs TIME_PERIOD="1971-06" OBS_VALUE="4.094" BBK_DIFF="1424.9"/>
      <bbk:Obs TIME_PERIOD="1971-05" OBS_VALUE="-0.309" BBK_DIFF="-109.4"/>
      <bbk:Obs TIME_PERIOD="1971-04" OBS_VALUE="3.294" BBK_DIFF="-77.9"/>
      <bbk:Obs TIME_PERIOD="1971-03" OBS_VALUE="14.921" BBK_DIFF="207.3"/>
      <bbk:Obs TIME_PERIOD="1971-02" OBS_VALUE="4.856" BBK_DIFF="144.6"/>
      <bbk:Obs TIME_PERIOD="1971-01" OBS_VALUE="-10.892"/>
    </bbk:Series>
  </bbk:DataSet>
</CompactData>
