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      <bbk:Obs TIME_PERIOD="1972-08" OBS_VALUE="16.807" BBK_DIFF="-27.6" BBK_DIFF_Y="1.8"/>
      <bbk:Obs TIME_PERIOD="1972-07" OBS_VALUE="23.224" BBK_DIFF="34.8" BBK_DIFF_Y="8.8"/>
      <bbk:Obs TIME_PERIOD="1972-06" OBS_VALUE="17.228" BBK_DIFF="-2.2" BBK_DIFF_Y="-7.6"/>
      <bbk:Obs TIME_PERIOD="1972-05" OBS_VALUE="17.615" BBK_DIFF="11.7" BBK_DIFF_Y="-2.0"/>
      <bbk:Obs TIME_PERIOD="1972-04" OBS_VALUE="15.773" BBK_DIFF="-13.4" BBK_DIFF_Y="2.5"/>
      <bbk:Obs TIME_PERIOD="1972-03" OBS_VALUE="18.21" BBK_DIFF="25.6" BBK_DIFF_Y="0.7"/>
      <bbk:Obs TIME_PERIOD="1972-02" OBS_VALUE="14.502" BBK_DIFF="-20.9" BBK_DIFF_Y="-17.0"/>
      <bbk:Obs TIME_PERIOD="1972-01" OBS_VALUE="18.34" BBK_DIFF="1.8" BBK_DIFF_Y="4.3"/>
      <bbk:Obs TIME_PERIOD="1971-12" OBS_VALUE="18.012" BBK_DIFF="1.3"/>
      <bbk:Obs TIME_PERIOD="1971-11" OBS_VALUE="17.78" BBK_DIFF="4.2"/>
      <bbk:Obs TIME_PERIOD="1971-10" OBS_VALUE="17.065" BBK_DIFF="2.0"/>
      <bbk:Obs TIME_PERIOD="1971-09" OBS_VALUE="16.724" BBK_DIFF="1.3"/>
      <bbk:Obs TIME_PERIOD="1971-08" OBS_VALUE="16.513" BBK_DIFF="-22.6"/>
      <bbk:Obs TIME_PERIOD="1971-07" OBS_VALUE="21.339" BBK_DIFF="14.4"/>
      <bbk:Obs TIME_PERIOD="1971-06" OBS_VALUE="18.652" BBK_DIFF="3.8"/>
      <bbk:Obs TIME_PERIOD="1971-05" OBS_VALUE="17.972" BBK_DIFF="16.8"/>
      <bbk:Obs TIME_PERIOD="1971-04" OBS_VALUE="15.387" BBK_DIFF="-14.9"/>
      <bbk:Obs TIME_PERIOD="1971-03" OBS_VALUE="18.09" BBK_DIFF="3.6"/>
      <bbk:Obs TIME_PERIOD="1971-02" OBS_VALUE="17.465" BBK_DIFF="-0.7"/>
      <bbk:Obs TIME_PERIOD="1971-01" OBS_VALUE="17.581"/>
    </bbk:Series>
  </bbk:DataSet>
</CompactData>
