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      <bbk:Obs TIME_PERIOD="1972-10" OBS_VALUE="14.193" BBK_DIFF="-3.1" BBK_DIFF_Y="-7.1"/>
      <bbk:Obs TIME_PERIOD="1972-09" OBS_VALUE="14.652" BBK_DIFF="-88.3" BBK_DIFF_Y="-76.1"/>
      <bbk:Obs TIME_PERIOD="1972-08" OBS_VALUE="124.98" BBK_DIFF="74.6" BBK_DIFF_Y="341.6"/>
      <bbk:Obs TIME_PERIOD="1972-07" OBS_VALUE="71.563" BBK_DIFF="-4.4" BBK_DIFF_Y="814.5"/>
      <bbk:Obs TIME_PERIOD="1972-06" OBS_VALUE="74.887" BBK_DIFF="2578.9" BBK_DIFF_Y="695.7"/>
      <bbk:Obs TIME_PERIOD="1972-05" OBS_VALUE="-3.021" BBK_DIFF="-122.2" BBK_DIFF_Y="-167.1"/>
      <bbk:Obs TIME_PERIOD="1972-04" OBS_VALUE="13.596" BBK_DIFF="-77.8" BBK_DIFF_Y="277.9"/>
      <bbk:Obs TIME_PERIOD="1972-03" OBS_VALUE="61.242" BBK_DIFF="284.0" BBK_DIFF_Y="-73.9"/>
      <bbk:Obs TIME_PERIOD="1972-02" OBS_VALUE="-33.28" BBK_DIFF="-165.6" BBK_DIFF_Y="-591.0"/>
      <bbk:Obs TIME_PERIOD="1972-01" OBS_VALUE="50.732" BBK_DIFF="401.8" BBK_DIFF_Y="-17.1"/>
      <bbk:Obs TIME_PERIOD="1971-12" OBS_VALUE="10.109" BBK_DIFF="-50.1"/>
      <bbk:Obs TIME_PERIOD="1971-11" OBS_VALUE="20.267" BBK_DIFF="32.7"/>
      <bbk:Obs TIME_PERIOD="1971-10" OBS_VALUE="15.276" BBK_DIFF="-75.1"/>
      <bbk:Obs TIME_PERIOD="1971-09" OBS_VALUE="61.309" BBK_DIFF="116.6"/>
      <bbk:Obs TIME_PERIOD="1971-08" OBS_VALUE="28.304" BBK_DIFF="261.7"/>
      <bbk:Obs TIME_PERIOD="1971-07" OBS_VALUE="7.825" BBK_DIFF="-16.9"/>
      <bbk:Obs TIME_PERIOD="1971-06" OBS_VALUE="9.412" BBK_DIFF="109.2"/>
      <bbk:Obs TIME_PERIOD="1971-05" OBS_VALUE="4.499" BBK_DIFF="158.9"/>
      <bbk:Obs TIME_PERIOD="1971-04" OBS_VALUE="-7.643" BBK_DIFF="-103.3"/>
      <bbk:Obs TIME_PERIOD="1971-03" OBS_VALUE="234.21" BBK_DIFF="4963.2"/>
      <bbk:Obs TIME_PERIOD="1971-02" OBS_VALUE="-4.816" BBK_DIFF="-107.9"/>
      <bbk:Obs TIME_PERIOD="1971-01" OBS_VALUE="61.191"/>
    </bbk:Series>
  </bbk:DataSet>
</CompactData>
