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      <bbk:Obs TIME_PERIOD="1972-05" OBS_VALUE="3.179" BBK_DIFF="37.6" BBK_DIFF_Y="434.3"/>
      <bbk:Obs TIME_PERIOD="1972-04" OBS_VALUE="2.31" BBK_DIFF="-45.3" BBK_DIFF_Y="7800.0"/>
      <bbk:Obs TIME_PERIOD="1972-03" OBS_VALUE="4.224" BBK_DIFF="-33.0" BBK_DIFF_Y="661.0"/>
      <bbk:Obs TIME_PERIOD="1972-02" OBS_VALUE="6.3" BBK_DIFF="82.7" BBK_DIFF_Y="207.5"/>
      <bbk:Obs TIME_PERIOD="1972-01" OBS_VALUE="3.449" BBK_DIFF="-44.5" BBK_DIFF_Y="2673.9"/>
      <bbk:Obs TIME_PERIOD="1971-12" OBS_VALUE="6.217" BBK_DIFF="489.3"/>
      <bbk:Obs TIME_PERIOD="1971-11" OBS_VALUE="1.055" BBK_DIFF="-4.4"/>
      <bbk:Obs TIME_PERIOD="1971-10" OBS_VALUE="1.103" BBK_DIFF="-82.1"/>
      <bbk:Obs TIME_PERIOD="1971-09" OBS_VALUE="6.159" BBK_DIFF="86.1"/>
      <bbk:Obs TIME_PERIOD="1971-08" OBS_VALUE="3.31" BBK_DIFF="-7.7"/>
      <bbk:Obs TIME_PERIOD="1971-07" OBS_VALUE="3.585" BBK_DIFF="206.0"/>
      <bbk:Obs TIME_PERIOD="1971-06" OBS_VALUE="-3.383" BBK_DIFF="-668.6"/>
      <bbk:Obs TIME_PERIOD="1971-05" OBS_VALUE="0.595" BBK_DIFF="2083.3"/>
      <bbk:Obs TIME_PERIOD="1971-04" OBS_VALUE="-0.03" BBK_DIFF="96.0"/>
      <bbk:Obs TIME_PERIOD="1971-03" OBS_VALUE="-0.753" BBK_DIFF="-136.7"/>
      <bbk:Obs TIME_PERIOD="1971-02" OBS_VALUE="2.049" BBK_DIFF="1629.1"/>
      <bbk:Obs TIME_PERIOD="1971-01" OBS_VALUE="-0.134"/>
    </bbk:Series>
  </bbk:DataSet>
</CompactData>
