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      <bbk:Obs TIME_PERIOD="1972-08" OBS_VALUE="0.57" BBK_DIFF="0.0" BBK_DIFF_Y="10.0"/>
      <bbk:Obs TIME_PERIOD="1972-07" OBS_VALUE="0.57" BBK_DIFF="1.8" BBK_DIFF_Y="10.0"/>
      <bbk:Obs TIME_PERIOD="1972-06" OBS_VALUE="0.56" BBK_DIFF="-0.2" BBK_DIFF_Y="8.9"/>
      <bbk:Obs TIME_PERIOD="1972-05" OBS_VALUE="0.561" BBK_DIFF="0.0" BBK_DIFF_Y="9.1"/>
      <bbk:Obs TIME_PERIOD="1972-04" OBS_VALUE="0.561" BBK_DIFF="1.8" BBK_DIFF_Y="9.1"/>
      <bbk:Obs TIME_PERIOD="1972-03" OBS_VALUE="0.551" BBK_DIFF="0.0" BBK_DIFF_Y="7.4"/>
      <bbk:Obs TIME_PERIOD="1972-02" OBS_VALUE="0.551" BBK_DIFF="0.0" BBK_DIFF_Y="7.8"/>
      <bbk:Obs TIME_PERIOD="1972-01" OBS_VALUE="0.551" BBK_DIFF="4.4" BBK_DIFF_Y="7.6"/>
      <bbk:Obs TIME_PERIOD="1971-12" OBS_VALUE="0.528" BBK_DIFF="0.2"/>
      <bbk:Obs TIME_PERIOD="1971-11" OBS_VALUE="0.527" BBK_DIFF="0.2"/>
      <bbk:Obs TIME_PERIOD="1971-10" OBS_VALUE="0.526" BBK_DIFF="1.5"/>
      <bbk:Obs TIME_PERIOD="1971-09" OBS_VALUE="0.518" BBK_DIFF="0.0"/>
      <bbk:Obs TIME_PERIOD="1971-08" OBS_VALUE="0.518" BBK_DIFF="0.0"/>
      <bbk:Obs TIME_PERIOD="1971-07" OBS_VALUE="0.518" BBK_DIFF="0.8"/>
      <bbk:Obs TIME_PERIOD="1971-06" OBS_VALUE="0.514" BBK_DIFF="0.0"/>
      <bbk:Obs TIME_PERIOD="1971-05" OBS_VALUE="0.514" BBK_DIFF="0.0"/>
      <bbk:Obs TIME_PERIOD="1971-04" OBS_VALUE="0.514" BBK_DIFF="0.2"/>
      <bbk:Obs TIME_PERIOD="1971-03" OBS_VALUE="0.513" BBK_DIFF="0.4"/>
      <bbk:Obs TIME_PERIOD="1971-02" OBS_VALUE="0.511" BBK_DIFF="-0.2"/>
      <bbk:Obs TIME_PERIOD="1971-01" OBS_VALUE="0.512"/>
    </bbk:Series>
  </bbk:DataSet>
</CompactData>
