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      <bbk:Obs TIME_PERIOD="1972-03" OBS_VALUE="428.903" BBK_DIFF="-0.6" BBK_DIFF_Y="-4.7"/>
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      <bbk:Obs TIME_PERIOD="1972-01" OBS_VALUE="453.95" BBK_DIFF="-5.1" BBK_DIFF_Y="1.9"/>
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  </bbk:DataSet>
</CompactData>
