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      <bbk:Obs TIME_PERIOD="1970-08" OBS_VALUE="8.4" BBK_DIFF_A="-0.2" BBK_DIFF_Y_A="1.5"/>
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      <bbk:Obs TIME_PERIOD="1970-04" OBS_VALUE="8.1" BBK_DIFF_A="0.0" BBK_DIFF_Y_A="1.7"/>
      <bbk:Obs TIME_PERIOD="1970-03" OBS_VALUE="8.1" BBK_DIFF_A="0.4" BBK_DIFF_Y_A="1.8"/>
      <bbk:Obs TIME_PERIOD="1970-02" OBS_VALUE="7.7" BBK_DIFF_A="0.1" BBK_DIFF_Y_A="1.5"/>
      <bbk:Obs TIME_PERIOD="1970-01" OBS_VALUE="7.6" BBK_DIFF_A="0.0" BBK_DIFF_Y_A="1.4"/>
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      <bbk:Obs TIME_PERIOD="1969-11" OBS_VALUE="7.3" BBK_DIFF_A="0.0" BBK_DIFF_Y_A="1.1"/>
      <bbk:Obs TIME_PERIOD="1969-10" OBS_VALUE="7.3" BBK_DIFF_A="0.2" BBK_DIFF_Y_A="1.1"/>
      <bbk:Obs TIME_PERIOD="1969-09" OBS_VALUE="7.1" BBK_DIFF_A="0.2" BBK_DIFF_Y_A="0.9"/>
      <bbk:Obs TIME_PERIOD="1969-08" OBS_VALUE="6.9" BBK_DIFF_A="0.0" BBK_DIFF_Y_A="0.6"/>
      <bbk:Obs TIME_PERIOD="1969-07" OBS_VALUE="6.9" BBK_DIFF_A="0.3" BBK_DIFF_Y_A="0.6"/>
      <bbk:Obs TIME_PERIOD="1969-06" OBS_VALUE="6.6" BBK_DIFF_A="0.2" BBK_DIFF_Y_A="0.3"/>
      <bbk:Obs TIME_PERIOD="1969-05" OBS_VALUE="6.4" BBK_DIFF_A="0.0" BBK_DIFF_Y_A="0.1"/>
      <bbk:Obs TIME_PERIOD="1969-04" OBS_VALUE="6.4" BBK_DIFF_A="0.1" BBK_DIFF_Y_A="-0.1"/>
      <bbk:Obs TIME_PERIOD="1969-03" OBS_VALUE="6.3" BBK_DIFF_A="0.1" BBK_DIFF_Y_A="-0.3"/>
      <bbk:Obs TIME_PERIOD="1969-02" OBS_VALUE="6.2" BBK_DIFF_A="0.0" BBK_DIFF_Y_A="-0.4"/>
      <bbk:Obs TIME_PERIOD="1969-01" OBS_VALUE="6.2" BBK_DIFF_A="0.0" BBK_DIFF_Y_A="-0.4"/>
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      <bbk:Obs TIME_PERIOD="1968-04" OBS_VALUE="6.5" BBK_DIFF_A="-0.1" BBK_DIFF_Y_A="-0.3"/>
      <bbk:Obs TIME_PERIOD="1968-03" OBS_VALUE="6.6" BBK_DIFF_A="0.0" BBK_DIFF_Y_A="-0.5"/>
      <bbk:Obs TIME_PERIOD="1968-02" OBS_VALUE="6.6" BBK_DIFF_A="0.0" BBK_DIFF_Y_A="-0.7"/>
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      <bbk:Obs TIME_PERIOD="1963-10" OBS_VALUE="6.0" BBK_DIFF_A="0.0" BBK_DIFF_Y_A="-0.1"/>
      <bbk:Obs TIME_PERIOD="1963-09" OBS_VALUE="6.0" BBK_DIFF_A="0.0" BBK_DIFF_Y_A="-0.1"/>
      <bbk:Obs TIME_PERIOD="1963-08" OBS_VALUE="6.0" BBK_DIFF_A="0.0" BBK_DIFF_Y_A="-0.1"/>
      <bbk:Obs TIME_PERIOD="1963-07" OBS_VALUE="6.0" BBK_DIFF_A="0.0" BBK_DIFF_Y_A="-0.1"/>
      <bbk:Obs TIME_PERIOD="1963-06" OBS_VALUE="6.0" BBK_DIFF_A="0.0" BBK_DIFF_Y_A="0.0"/>
      <bbk:Obs TIME_PERIOD="1963-05" OBS_VALUE="6.0" BBK_DIFF_A="0.0" BBK_DIFF_Y_A="0.2"/>
      <bbk:Obs TIME_PERIOD="1963-04" OBS_VALUE="6.0" BBK_DIFF_A="0.0" BBK_DIFF_Y_A="0.4"/>
      <bbk:Obs TIME_PERIOD="1963-03" OBS_VALUE="6.0" BBK_DIFF_A="0.0" BBK_DIFF_Y_A="0.3"/>
      <bbk:Obs TIME_PERIOD="1963-02" OBS_VALUE="6.0" BBK_DIFF_A="-0.1" BBK_DIFF_Y_A="0.2"/>
      <bbk:Obs TIME_PERIOD="1963-01" OBS_VALUE="6.1" BBK_DIFF_A="0.0" BBK_DIFF_Y_A="0.2"/>
      <bbk:Obs TIME_PERIOD="1962-12" OBS_VALUE="6.1" BBK_DIFF_A="0.0" BBK_DIFF_Y_A="0.1"/>
      <bbk:Obs TIME_PERIOD="1962-11" OBS_VALUE="6.1" BBK_DIFF_A="0.0" BBK_DIFF_Y_A="0.1"/>
      <bbk:Obs TIME_PERIOD="1962-10" OBS_VALUE="6.1" BBK_DIFF_A="0.0" BBK_DIFF_Y_A="0.1"/>
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      <bbk:Obs TIME_PERIOD="1962-08" OBS_VALUE="6.1" BBK_DIFF_A="0.0" BBK_DIFF_Y_A="0.2"/>
      <bbk:Obs TIME_PERIOD="1962-07" OBS_VALUE="6.1" BBK_DIFF_A="0.1" BBK_DIFF_Y_A="0.4"/>
      <bbk:Obs TIME_PERIOD="1962-06" OBS_VALUE="6.0" BBK_DIFF_A="0.2" BBK_DIFF_Y_A="0.4"/>
      <bbk:Obs TIME_PERIOD="1962-05" OBS_VALUE="5.8" BBK_DIFF_A="0.2" BBK_DIFF_Y_A="0.3"/>
      <bbk:Obs TIME_PERIOD="1962-04" OBS_VALUE="5.6" BBK_DIFF_A="-0.1" BBK_DIFF_Y_A="0.0"/>
      <bbk:Obs TIME_PERIOD="1962-03" OBS_VALUE="5.7" BBK_DIFF_A="-0.1" BBK_DIFF_Y_A="-0.1"/>
      <bbk:Obs TIME_PERIOD="1962-02" OBS_VALUE="5.8" BBK_DIFF_A="-0.1" BBK_DIFF_Y_A="-0.1"/>
      <bbk:Obs TIME_PERIOD="1962-01" OBS_VALUE="5.9" BBK_DIFF_A="-0.1" BBK_DIFF_Y_A="-0.1"/>
      <bbk:Obs TIME_PERIOD="1961-12" OBS_VALUE="6.0" BBK_DIFF_A="0.0" BBK_DIFF_Y_A="0.0"/>
      <bbk:Obs TIME_PERIOD="1961-11" OBS_VALUE="6.0" BBK_DIFF_A="0.0" BBK_DIFF_Y_A="0.0"/>
      <bbk:Obs TIME_PERIOD="1961-10" OBS_VALUE="6.0" BBK_DIFF_A="0.0" BBK_DIFF_Y_A="-0.2"/>
      <bbk:Obs TIME_PERIOD="1961-09" OBS_VALUE="6.0" BBK_DIFF_A="0.1" BBK_DIFF_Y_A="-0.4"/>
      <bbk:Obs TIME_PERIOD="1961-08" OBS_VALUE="5.9" BBK_DIFF_A="0.2" BBK_DIFF_Y_A="-0.5"/>
      <bbk:Obs TIME_PERIOD="1961-07" OBS_VALUE="5.7" BBK_DIFF_A="0.1" BBK_DIFF_Y_A="-0.8"/>
      <bbk:Obs TIME_PERIOD="1961-06" OBS_VALUE="5.6" BBK_DIFF_A="0.1" BBK_DIFF_Y_A="-0.9"/>
      <bbk:Obs TIME_PERIOD="1961-05" OBS_VALUE="5.5" BBK_DIFF_A="-0.1" BBK_DIFF_Y_A="-0.9"/>
      <bbk:Obs TIME_PERIOD="1961-04" OBS_VALUE="5.6" BBK_DIFF_A="-0.2" BBK_DIFF_Y_A="-0.7"/>
      <bbk:Obs TIME_PERIOD="1961-03" OBS_VALUE="5.8" BBK_DIFF_A="-0.1" BBK_DIFF_Y_A="-0.5"/>
      <bbk:Obs TIME_PERIOD="1961-02" OBS_VALUE="5.9" BBK_DIFF_A="-0.1"/>
      <bbk:Obs TIME_PERIOD="1961-01" OBS_VALUE="6.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="1960-12" OBS_VALUE="6.0" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="1960-11" OBS_VALUE="6.0" BBK_DIFF_A="-0.2"/>
      <bbk:Obs TIME_PERIOD="1960-10" OBS_VALUE="6.2" BBK_DIFF_A="-0.2"/>
      <bbk:Obs TIME_PERIOD="1960-09" OBS_VALUE="6.4" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="1960-08" OBS_VALUE="6.4" BBK_DIFF_A="-0.1"/>
      <bbk:Obs TIME_PERIOD="1960-07" OBS_VALUE="6.5" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="1960-06" OBS_VALUE="6.5" BBK_DIFF_A="0.1"/>
      <bbk:Obs TIME_PERIOD="1960-05" OBS_VALUE="6.4" BBK_DIFF_A="0.1"/>
      <bbk:Obs TIME_PERIOD="1960-04" OBS_VALUE="6.3" BBK_DIFF_A="0.0"/>
      <bbk:Obs TIME_PERIOD="1960-03" OBS_VALUE="6.3"/>
      <bbk:Obs TIME_PERIOD="1960-02" BBK_OBS_STATUS="K"/>
    </bbk:Series>
  </bbk:DataSet>
</CompactData>
