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      <bbk:Obs TIME_PERIOD="1972-06" OBS_VALUE="84.878" BBK_DIFF="4.0" BBK_DIFF_Y="-32.8"/>
      <bbk:Obs TIME_PERIOD="1972-05" OBS_VALUE="81.641" BBK_DIFF="29.4" BBK_DIFF_Y="-11.1"/>
      <bbk:Obs TIME_PERIOD="1972-04" OBS_VALUE="63.111" BBK_DIFF="0.2" BBK_DIFF_Y="6.7"/>
      <bbk:Obs TIME_PERIOD="1972-03" OBS_VALUE="62.977" BBK_DIFF="10.1" BBK_DIFF_Y="-3.0"/>
      <bbk:Obs TIME_PERIOD="1972-02" OBS_VALUE="57.22" BBK_DIFF="-7.2" BBK_DIFF_Y="35.7"/>
      <bbk:Obs TIME_PERIOD="1972-01" OBS_VALUE="61.636" BBK_DIFF="-32.0" BBK_DIFF_Y="-5.0"/>
      <bbk:Obs TIME_PERIOD="1971-12" OBS_VALUE="90.673" BBK_DIFF="21.3"/>
      <bbk:Obs TIME_PERIOD="1971-11" OBS_VALUE="74.737" BBK_DIFF="7.2"/>
      <bbk:Obs TIME_PERIOD="1971-10" OBS_VALUE="69.716" BBK_DIFF="10.2"/>
      <bbk:Obs TIME_PERIOD="1971-09" OBS_VALUE="63.236" BBK_DIFF="10.1"/>
      <bbk:Obs TIME_PERIOD="1971-08" OBS_VALUE="57.432" BBK_DIFF="-39.2"/>
      <bbk:Obs TIME_PERIOD="1971-07" OBS_VALUE="94.413" BBK_DIFF="-25.3"/>
      <bbk:Obs TIME_PERIOD="1971-06" OBS_VALUE="126.397" BBK_DIFF="37.6"/>
      <bbk:Obs TIME_PERIOD="1971-05" OBS_VALUE="91.836" BBK_DIFF="55.2"/>
      <bbk:Obs TIME_PERIOD="1971-04" OBS_VALUE="59.155" BBK_DIFF="-8.9"/>
      <bbk:Obs TIME_PERIOD="1971-03" OBS_VALUE="64.9" BBK_DIFF="53.9"/>
      <bbk:Obs TIME_PERIOD="1971-02" OBS_VALUE="42.159" BBK_DIFF="-35.0"/>
      <bbk:Obs TIME_PERIOD="1971-01" OBS_VALUE="64.888"/>
    </bbk:Series>
  </bbk:DataSet>
</CompactData>
