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      <bbk:Obs TIME_PERIOD="1972-03" OBS_VALUE="-67.381" BBK_DIFF="-192.1" BBK_DIFF_Y="-236.1"/>
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      <bbk:Obs TIME_PERIOD="1972-01" OBS_VALUE="250.759" BBK_DIFF="288.8" BBK_DIFF_Y="89.2"/>
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      <bbk:Obs TIME_PERIOD="1971-07" OBS_VALUE="50.961" BBK_DIFF="154.2"/>
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  </bbk:DataSet>
</CompactData>
