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      <bbk:Obs TIME_PERIOD="1972-11" OBS_VALUE="32.313" BBK_DIFF="66.4" BBK_DIFF_Y="834.9"/>
      <bbk:Obs TIME_PERIOD="1972-10" OBS_VALUE="19.419" BBK_DIFF="-66.6" BBK_DIFF_Y="170.1"/>
      <bbk:Obs TIME_PERIOD="1972-09" OBS_VALUE="58.199" BBK_DIFF="2341.0" BBK_DIFF_Y="57.1"/>
      <bbk:Obs TIME_PERIOD="1972-08" OBS_VALUE="-2.597" BBK_DIFF="-140.7" BBK_DIFF_Y="-117.0"/>
      <bbk:Obs TIME_PERIOD="1972-07" OBS_VALUE="6.38" BBK_DIFF="-49.4" BBK_DIFF_Y="-88.3"/>
      <bbk:Obs TIME_PERIOD="1972-06" OBS_VALUE="12.612" BBK_DIFF="36.9" BBK_DIFF_Y="-82.3"/>
      <bbk:Obs TIME_PERIOD="1972-05" OBS_VALUE="9.212" BBK_DIFF="109.8" BBK_DIFF_Y="429.1"/>
      <bbk:Obs TIME_PERIOD="1972-04" OBS_VALUE="4.39" BBK_DIFF="-77.9" BBK_DIFF_Y="941.0"/>
      <bbk:Obs TIME_PERIOD="1972-03" OBS_VALUE="19.854" BBK_DIFF="248.0" BBK_DIFF_Y="25.2"/>
      <bbk:Obs TIME_PERIOD="1972-02" OBS_VALUE="-13.416" BBK_DIFF="-179.0" BBK_DIFF_Y="-141.3"/>
      <bbk:Obs TIME_PERIOD="1972-01" OBS_VALUE="16.981" BBK_DIFF="-55.2" BBK_DIFF_Y="-46.0"/>
      <bbk:Obs TIME_PERIOD="1971-12" OBS_VALUE="37.937" BBK_DIFF="962.8"/>
      <bbk:Obs TIME_PERIOD="1971-11" OBS_VALUE="-4.397" BBK_DIFF="84.1"/>
      <bbk:Obs TIME_PERIOD="1971-10" OBS_VALUE="-27.695" BBK_DIFF="-174.7"/>
      <bbk:Obs TIME_PERIOD="1971-09" OBS_VALUE="37.056" BBK_DIFF="143.0"/>
      <bbk:Obs TIME_PERIOD="1971-08" OBS_VALUE="15.25" BBK_DIFF="-72.1"/>
      <bbk:Obs TIME_PERIOD="1971-07" OBS_VALUE="54.706" BBK_DIFF="-23.4"/>
      <bbk:Obs TIME_PERIOD="1971-06" OBS_VALUE="71.379" BBK_DIFF="3999.9"/>
      <bbk:Obs TIME_PERIOD="1971-05" OBS_VALUE="1.741" BBK_DIFF="433.5"/>
      <bbk:Obs TIME_PERIOD="1971-04" OBS_VALUE="-0.522" BBK_DIFF="-103.3"/>
      <bbk:Obs TIME_PERIOD="1971-03" OBS_VALUE="15.856" BBK_DIFF="-51.2"/>
      <bbk:Obs TIME_PERIOD="1971-02" OBS_VALUE="32.463" BBK_DIFF="3.2"/>
      <bbk:Obs TIME_PERIOD="1971-01" OBS_VALUE="31.468"/>
    </bbk:Series>
  </bbk:DataSet>
</CompactData>
