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      <bbk:Obs TIME_PERIOD="1972-06" OBS_VALUE="4551.433" BBK_DIFF="4403.7" BBK_DIFF_Y="210.9"/>
      <bbk:Obs TIME_PERIOD="1972-05" OBS_VALUE="101.059" BBK_DIFF="3.1" BBK_DIFF_Y="-97.6"/>
      <bbk:Obs TIME_PERIOD="1972-04" OBS_VALUE="98.013" BBK_DIFF="191.2" BBK_DIFF_Y="-94.4"/>
      <bbk:Obs TIME_PERIOD="1972-03" OBS_VALUE="-107.441" BBK_DIFF="-108.8" BBK_DIFF_Y="-106.0"/>
      <bbk:Obs TIME_PERIOD="1972-02" OBS_VALUE="1226.151" BBK_DIFF="76.2" BBK_DIFF_Y="-22.1"/>
      <bbk:Obs TIME_PERIOD="1972-01" OBS_VALUE="695.895" BBK_DIFF="-43.3" BBK_DIFF_Y="60.9"/>
      <bbk:Obs TIME_PERIOD="1971-12" OBS_VALUE="1227.835" BBK_DIFF="304.2"/>
      <bbk:Obs TIME_PERIOD="1971-11" OBS_VALUE="303.781" BBK_DIFF="-37.1"/>
      <bbk:Obs TIME_PERIOD="1971-10" OBS_VALUE="483.001" BBK_DIFF="13.1"/>
      <bbk:Obs TIME_PERIOD="1971-09" OBS_VALUE="427.108" BBK_DIFF="185.3"/>
      <bbk:Obs TIME_PERIOD="1971-08" OBS_VALUE="-500.644" BBK_DIFF="-168.2"/>
      <bbk:Obs TIME_PERIOD="1971-07" OBS_VALUE="734.162" BBK_DIFF="117.9"/>
      <bbk:Obs TIME_PERIOD="1971-06" OBS_VALUE="-4103.999" BBK_DIFF="-196.9"/>
      <bbk:Obs TIME_PERIOD="1971-05" OBS_VALUE="4233.787" BBK_DIFF="141.9"/>
      <bbk:Obs TIME_PERIOD="1971-04" OBS_VALUE="1750.242" BBK_DIFF="-1.5"/>
      <bbk:Obs TIME_PERIOD="1971-03" OBS_VALUE="1777.128" BBK_DIFF="12.8"/>
      <bbk:Obs TIME_PERIOD="1971-02" OBS_VALUE="1574.891" BBK_DIFF="264.2"/>
      <bbk:Obs TIME_PERIOD="1971-01" OBS_VALUE="432.446"/>
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  </bbk:DataSet>
</CompactData>
