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      <bbk:Obs TIME_PERIOD="1972-07" OBS_VALUE="-12.227" BBK_DIFF="-155.0" BBK_DIFF_Y="-224.6"/>
      <bbk:Obs TIME_PERIOD="1972-06" OBS_VALUE="22.217" BBK_DIFF="235.8" BBK_DIFF_Y="8894.7"/>
      <bbk:Obs TIME_PERIOD="1972-05" OBS_VALUE="6.617" BBK_DIFF="552.6" BBK_DIFF_Y="-54.7"/>
      <bbk:Obs TIME_PERIOD="1972-04" OBS_VALUE="1.014" BBK_DIFF="182.4" BBK_DIFF_Y="1030.3"/>
      <bbk:Obs TIME_PERIOD="1972-03" OBS_VALUE="-1.231" BBK_DIFF="-115.8" BBK_DIFF_Y="-108.8"/>
      <bbk:Obs TIME_PERIOD="1972-02" OBS_VALUE="7.8" BBK_DIFF="485.4" BBK_DIFF_Y="158.1"/>
      <bbk:Obs TIME_PERIOD="1972-01" OBS_VALUE="-2.024" BBK_DIFF="-120.1" BBK_DIFF_Y="69.8"/>
      <bbk:Obs TIME_PERIOD="1971-12" OBS_VALUE="10.065" BBK_DIFF="135.9"/>
      <bbk:Obs TIME_PERIOD="1971-11" OBS_VALUE="4.267" BBK_DIFF="43.7"/>
      <bbk:Obs TIME_PERIOD="1971-10" OBS_VALUE="2.97" BBK_DIFF="144.2"/>
      <bbk:Obs TIME_PERIOD="1971-09" OBS_VALUE="-6.719" BBK_DIFF="-248.7"/>
      <bbk:Obs TIME_PERIOD="1971-08" OBS_VALUE="4.52" BBK_DIFF="-53.9"/>
      <bbk:Obs TIME_PERIOD="1971-07" OBS_VALUE="9.814" BBK_DIFF="3873.3"/>
      <bbk:Obs TIME_PERIOD="1971-06" OBS_VALUE="0.247" BBK_DIFF="-98.3"/>
      <bbk:Obs TIME_PERIOD="1971-05" OBS_VALUE="14.607" BBK_DIFF="13500.9"/>
      <bbk:Obs TIME_PERIOD="1971-04" OBS_VALUE="-0.109" BBK_DIFF="-100.8"/>
      <bbk:Obs TIME_PERIOD="1971-03" OBS_VALUE="14.067" BBK_DIFF="365.5"/>
      <bbk:Obs TIME_PERIOD="1971-02" OBS_VALUE="3.022" BBK_DIFF="145.1"/>
      <bbk:Obs TIME_PERIOD="1971-01" OBS_VALUE="-6.699"/>
    </bbk:Series>
  </bbk:DataSet>
</CompactData>
