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      <bbk:Obs TIME_PERIOD="1972-05" OBS_VALUE="4.442" BBK_DIFF="-38.3" BBK_DIFF_Y="-37.6"/>
      <bbk:Obs TIME_PERIOD="1972-04" OBS_VALUE="7.194" BBK_DIFF="3715.1" BBK_DIFF_Y="15.8"/>
      <bbk:Obs TIME_PERIOD="1972-03" OBS_VALUE="-0.199" BBK_DIFF="76.7" BBK_DIFF_Y="94.7"/>
      <bbk:Obs TIME_PERIOD="1972-02" OBS_VALUE="-0.854" BBK_DIFF="-106.5" BBK_DIFF_Y="86.2"/>
      <bbk:Obs TIME_PERIOD="1972-01" OBS_VALUE="13.05" BBK_DIFF="198.3" BBK_DIFF_Y="70.5"/>
      <bbk:Obs TIME_PERIOD="1971-12" OBS_VALUE="4.375" BBK_DIFF="82.7"/>
      <bbk:Obs TIME_PERIOD="1971-11" OBS_VALUE="2.395" BBK_DIFF="-80.3"/>
      <bbk:Obs TIME_PERIOD="1971-10" OBS_VALUE="12.183" BBK_DIFF="561.8"/>
      <bbk:Obs TIME_PERIOD="1971-09" OBS_VALUE="-2.638" BBK_DIFF="18.6"/>
      <bbk:Obs TIME_PERIOD="1971-08" OBS_VALUE="-3.24" BBK_DIFF="-120.6"/>
      <bbk:Obs TIME_PERIOD="1971-07" OBS_VALUE="15.709" BBK_DIFF="-20.3"/>
      <bbk:Obs TIME_PERIOD="1971-06" OBS_VALUE="19.712" BBK_DIFF="176.8"/>
      <bbk:Obs TIME_PERIOD="1971-05" OBS_VALUE="7.121" BBK_DIFF="14.6"/>
      <bbk:Obs TIME_PERIOD="1971-04" OBS_VALUE="6.214" BBK_DIFF="266.9"/>
      <bbk:Obs TIME_PERIOD="1971-03" OBS_VALUE="-3.723" BBK_DIFF="39.8"/>
      <bbk:Obs TIME_PERIOD="1971-02" OBS_VALUE="-6.183" BBK_DIFF="-180.8"/>
      <bbk:Obs TIME_PERIOD="1971-01" OBS_VALUE="7.656"/>
    </bbk:Series>
  </bbk:DataSet>
</CompactData>
