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      <bbk:Obs TIME_PERIOD="1972-11" OBS_VALUE="2.578" BBK_DIFF="138.7" BBK_DIFF_Y="-78.6"/>
      <bbk:Obs TIME_PERIOD="1972-10" OBS_VALUE="-6.661" BBK_DIFF="7.8" BBK_DIFF_Y="-2502.0"/>
      <bbk:Obs TIME_PERIOD="1972-09" OBS_VALUE="-7.227" BBK_DIFF="-253.0" BBK_DIFF_Y="-384.6"/>
      <bbk:Obs TIME_PERIOD="1972-08" OBS_VALUE="4.723" BBK_DIFF="-58.4" BBK_DIFF_Y="-21.8"/>
      <bbk:Obs TIME_PERIOD="1972-07" OBS_VALUE="11.366" BBK_DIFF="244.8" BBK_DIFF_Y="379.1"/>
      <bbk:Obs TIME_PERIOD="1972-06" OBS_VALUE="-7.849" BBK_DIFF="58.8" BBK_DIFF_Y="-229.8"/>
      <bbk:Obs TIME_PERIOD="1972-05" OBS_VALUE="-19.034" BBK_DIFF="-1550.8" BBK_DIFF_Y="-472.6"/>
      <bbk:Obs TIME_PERIOD="1972-04" OBS_VALUE="1.312" BBK_DIFF="-88.2" BBK_DIFF_Y="118.0"/>
      <bbk:Obs TIME_PERIOD="1972-03" OBS_VALUE="11.075" BBK_DIFF="310.3" BBK_DIFF_Y="186.2"/>
      <bbk:Obs TIME_PERIOD="1972-02" OBS_VALUE="-5.267" BBK_DIFF="9.7" BBK_DIFF_Y="-96.1"/>
      <bbk:Obs TIME_PERIOD="1972-01" OBS_VALUE="-5.831" BBK_DIFF="-175.3" BBK_DIFF_Y="-9.6"/>
      <bbk:Obs TIME_PERIOD="1971-12" OBS_VALUE="7.748" BBK_DIFF="-35.8"/>
      <bbk:Obs TIME_PERIOD="1971-11" OBS_VALUE="12.072" BBK_DIFF="4815.6"/>
      <bbk:Obs TIME_PERIOD="1971-10" OBS_VALUE="-0.256" BBK_DIFF="-110.1"/>
      <bbk:Obs TIME_PERIOD="1971-09" OBS_VALUE="2.539" BBK_DIFF="-58.0"/>
      <bbk:Obs TIME_PERIOD="1971-08" OBS_VALUE="6.041" BBK_DIFF="248.3"/>
      <bbk:Obs TIME_PERIOD="1971-07" OBS_VALUE="-4.073" BBK_DIFF="-167.3"/>
      <bbk:Obs TIME_PERIOD="1971-06" OBS_VALUE="6.049" BBK_DIFF="18.4"/>
      <bbk:Obs TIME_PERIOD="1971-05" OBS_VALUE="5.109" BBK_DIFF="169.9"/>
      <bbk:Obs TIME_PERIOD="1971-04" OBS_VALUE="-7.304" BBK_DIFF="-288.7"/>
      <bbk:Obs TIME_PERIOD="1971-03" OBS_VALUE="3.87" BBK_DIFF="244.1"/>
      <bbk:Obs TIME_PERIOD="1971-02" OBS_VALUE="-2.686" BBK_DIFF="49.5"/>
      <bbk:Obs TIME_PERIOD="1971-01" OBS_VALUE="-5.322"/>
    </bbk:Series>
  </bbk:DataSet>
</CompactData>
