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      <bbk:Obs TIME_PERIOD="1972-04" OBS_VALUE="355.863" BBK_DIFF="28.3" BBK_DIFF_Y="70.5"/>
      <bbk:Obs TIME_PERIOD="1972-03" OBS_VALUE="277.399" BBK_DIFF="6.0" BBK_DIFF_Y="10.7"/>
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      <bbk:Obs TIME_PERIOD="1972-01" OBS_VALUE="204.41" BBK_DIFF="-19.7" BBK_DIFF_Y="3.3"/>
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      <bbk:Obs TIME_PERIOD="1971-04" OBS_VALUE="208.774" BBK_DIFF="-16.7"/>
      <bbk:Obs TIME_PERIOD="1971-03" OBS_VALUE="250.521" BBK_DIFF="1.1"/>
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  </bbk:DataSet>
</CompactData>
