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      <bbk:Obs TIME_PERIOD="1972-06" OBS_VALUE="1.095" BBK_DIFF="50.0" BBK_DIFF_Y="-59.1"/>
      <bbk:Obs TIME_PERIOD="1972-05" OBS_VALUE="0.73" BBK_DIFF="-54.5" BBK_DIFF_Y="-81.1"/>
      <bbk:Obs TIME_PERIOD="1972-04" OBS_VALUE="1.603" BBK_DIFF="70.0" BBK_DIFF_Y="-36.7"/>
      <bbk:Obs TIME_PERIOD="1972-03" OBS_VALUE="0.943" BBK_DIFF="-12.7" BBK_DIFF_Y="-69.2"/>
      <bbk:Obs TIME_PERIOD="1972-02" OBS_VALUE="1.08" BBK_DIFF="-48.3" BBK_DIFF_Y="-51.3"/>
      <bbk:Obs TIME_PERIOD="1972-01" OBS_VALUE="2.088" BBK_DIFF="-30.2" BBK_DIFF_Y="-25.2"/>
      <bbk:Obs TIME_PERIOD="1971-12" OBS_VALUE="2.992" BBK_DIFF="72.4"/>
      <bbk:Obs TIME_PERIOD="1971-11" OBS_VALUE="1.735" BBK_DIFF="-42.7"/>
      <bbk:Obs TIME_PERIOD="1971-10" OBS_VALUE="3.03" BBK_DIFF="114.6"/>
      <bbk:Obs TIME_PERIOD="1971-09" OBS_VALUE="1.412" BBK_DIFF="-6.4"/>
      <bbk:Obs TIME_PERIOD="1971-08" OBS_VALUE="1.509" BBK_DIFF="-32.2"/>
      <bbk:Obs TIME_PERIOD="1971-07" OBS_VALUE="2.225" BBK_DIFF="-16.8"/>
      <bbk:Obs TIME_PERIOD="1971-06" OBS_VALUE="2.674" BBK_DIFF="-30.6"/>
      <bbk:Obs TIME_PERIOD="1971-05" OBS_VALUE="3.854" BBK_DIFF="52.2"/>
      <bbk:Obs TIME_PERIOD="1971-04" OBS_VALUE="2.533" BBK_DIFF="-17.2"/>
      <bbk:Obs TIME_PERIOD="1971-03" OBS_VALUE="3.058" BBK_DIFF="37.9"/>
      <bbk:Obs TIME_PERIOD="1971-02" OBS_VALUE="2.217" BBK_DIFF="-20.6"/>
      <bbk:Obs TIME_PERIOD="1971-01" OBS_VALUE="2.793"/>
    </bbk:Series>
  </bbk:DataSet>
</CompactData>
