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      <bbk:Obs TIME_PERIOD="1972-10" OBS_VALUE="2.335" BBK_DIFF="104.9" BBK_DIFF_Y="18.3"/>
      <bbk:Obs TIME_PERIOD="1972-09" OBS_VALUE="-47.94" BBK_DIFF="-316.9" BBK_DIFF_Y="-216.7"/>
      <bbk:Obs TIME_PERIOD="1972-08" OBS_VALUE="22.103" BBK_DIFF="164.6" BBK_DIFF_Y="421.3"/>
      <bbk:Obs TIME_PERIOD="1972-07" OBS_VALUE="-34.218" BBK_DIFF="-280.4" BBK_DIFF_Y="-190.2"/>
      <bbk:Obs TIME_PERIOD="1972-06" OBS_VALUE="18.968" BBK_DIFF="688.7" BBK_DIFF_Y="212.5"/>
      <bbk:Obs TIME_PERIOD="1972-05" OBS_VALUE="-3.222" BBK_DIFF="59.4" BBK_DIFF_Y="-108.1"/>
      <bbk:Obs TIME_PERIOD="1972-04" OBS_VALUE="-7.94" BBK_DIFF="-173.5" BBK_DIFF_Y="26.1"/>
      <bbk:Obs TIME_PERIOD="1972-03" OBS_VALUE="10.807" BBK_DIFF="184.4" BBK_DIFF_Y="-18.5"/>
      <bbk:Obs TIME_PERIOD="1972-02" OBS_VALUE="-12.805" BBK_DIFF="-329.7" BBK_DIFF_Y="-220.1"/>
      <bbk:Obs TIME_PERIOD="1972-01" OBS_VALUE="-2.98" BBK_DIFF="-305.4" BBK_DIFF_Y="-218.3"/>
      <bbk:Obs TIME_PERIOD="1971-12" OBS_VALUE="-0.735" BBK_DIFF="86.4"/>
      <bbk:Obs TIME_PERIOD="1971-11" OBS_VALUE="-5.398" BBK_DIFF="-373.6"/>
      <bbk:Obs TIME_PERIOD="1971-10" OBS_VALUE="1.973" BBK_DIFF="113.0"/>
      <bbk:Obs TIME_PERIOD="1971-09" OBS_VALUE="-15.139" BBK_DIFF="-457.1"/>
      <bbk:Obs TIME_PERIOD="1971-08" OBS_VALUE="4.24" BBK_DIFF="136.0"/>
      <bbk:Obs TIME_PERIOD="1971-07" OBS_VALUE="-11.79" BBK_DIFF="-294.2"/>
      <bbk:Obs TIME_PERIOD="1971-06" OBS_VALUE="6.07" BBK_DIFF="-84.7"/>
      <bbk:Obs TIME_PERIOD="1971-05" OBS_VALUE="39.774" BBK_DIFF="470.3"/>
      <bbk:Obs TIME_PERIOD="1971-04" OBS_VALUE="-10.741" BBK_DIFF="-181.0"/>
      <bbk:Obs TIME_PERIOD="1971-03" OBS_VALUE="13.263" BBK_DIFF="24.4"/>
      <bbk:Obs TIME_PERIOD="1971-02" OBS_VALUE="10.664" BBK_DIFF="323.2"/>
      <bbk:Obs TIME_PERIOD="1971-01" OBS_VALUE="2.52"/>
    </bbk:Series>
  </bbk:DataSet>
</CompactData>
