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    <Prepared>2026-05-02T03:33:28</Prepared>
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      <bbk:Obs TIME_PERIOD="1972-03" OBS_VALUE="40.0" BBK_DIFF="0.3" BBK_DIFF_Y="1.5"/>
      <bbk:Obs TIME_PERIOD="1972-02" OBS_VALUE="39.9" BBK_DIFF="0.0" BBK_DIFF_Y="1.3"/>
      <bbk:Obs TIME_PERIOD="1972-01" OBS_VALUE="39.9" BBK_DIFF="-0.3" BBK_DIFF_Y="1.5"/>
      <bbk:Obs TIME_PERIOD="1971-12" OBS_VALUE="40.0" BBK_DIFF="0.0" BBK_DIFF_Y="1.8"/>
      <bbk:Obs TIME_PERIOD="1971-11" OBS_VALUE="40.0" BBK_DIFF="0.3" BBK_DIFF_Y="1.8"/>
      <bbk:Obs TIME_PERIOD="1971-10" OBS_VALUE="39.9" BBK_DIFF="0.0" BBK_DIFF_Y="2.0"/>
      <bbk:Obs TIME_PERIOD="1971-09" OBS_VALUE="39.9" BBK_DIFF="0.0" BBK_DIFF_Y="3.4"/>
      <bbk:Obs TIME_PERIOD="1971-08" OBS_VALUE="39.9" BBK_DIFF="0.5" BBK_DIFF_Y="3.6"/>
      <bbk:Obs TIME_PERIOD="1971-07" OBS_VALUE="39.7" BBK_DIFF="0.3" BBK_DIFF_Y="3.4"/>
      <bbk:Obs TIME_PERIOD="1971-06" OBS_VALUE="39.6" BBK_DIFF="0.3" BBK_DIFF_Y="3.7"/>
      <bbk:Obs TIME_PERIOD="1971-05" OBS_VALUE="39.5" BBK_DIFF="0.0" BBK_DIFF_Y="3.7"/>
      <bbk:Obs TIME_PERIOD="1971-04" OBS_VALUE="39.5" BBK_DIFF="0.3" BBK_DIFF_Y="3.9"/>
      <bbk:Obs TIME_PERIOD="1971-03" OBS_VALUE="39.4" BBK_DIFF="0.0" BBK_DIFF_Y="3.7"/>
      <bbk:Obs TIME_PERIOD="1971-02" OBS_VALUE="39.4" BBK_DIFF="0.3" BBK_DIFF_Y="3.7"/>
      <bbk:Obs TIME_PERIOD="1971-01" OBS_VALUE="39.3" BBK_DIFF="0.0" BBK_DIFF_Y="3.7"/>
      <bbk:Obs TIME_PERIOD="1970-12" OBS_VALUE="39.3" BBK_DIFF="0.0"/>
      <bbk:Obs TIME_PERIOD="1970-11" OBS_VALUE="39.3" BBK_DIFF="0.5"/>
      <bbk:Obs TIME_PERIOD="1970-10" OBS_VALUE="39.1" BBK_DIFF="1.3"/>
      <bbk:Obs TIME_PERIOD="1970-09" OBS_VALUE="38.6" BBK_DIFF="0.3"/>
      <bbk:Obs TIME_PERIOD="1970-08" OBS_VALUE="38.5" BBK_DIFF="0.3"/>
      <bbk:Obs TIME_PERIOD="1970-07" OBS_VALUE="38.4" BBK_DIFF="0.5"/>
      <bbk:Obs TIME_PERIOD="1970-06" OBS_VALUE="38.2" BBK_DIFF="0.3"/>
      <bbk:Obs TIME_PERIOD="1970-05" OBS_VALUE="38.1" BBK_DIFF="0.3"/>
      <bbk:Obs TIME_PERIOD="1970-04" OBS_VALUE="38.0" BBK_DIFF="0.0"/>
      <bbk:Obs TIME_PERIOD="1970-03" OBS_VALUE="38.0" BBK_DIFF="0.0"/>
      <bbk:Obs TIME_PERIOD="1970-02" OBS_VALUE="38.0" BBK_DIFF="0.3"/>
      <bbk:Obs TIME_PERIOD="1970-01" OBS_VALUE="37.9"/>
    </bbk:Series>
  </bbk:DataSet>
</CompactData>
