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      <bbk:Obs TIME_PERIOD="1976-05" OBS_VALUE="4.93" BBK_DIFF_A="0.56" BBK_DIFF_Y_A="-0.65"/>
      <bbk:Obs TIME_PERIOD="1976-04" OBS_VALUE="4.37" BBK_DIFF_A="-0.21" BBK_DIFF_Y_A="-1.57"/>
      <bbk:Obs TIME_PERIOD="1976-03" OBS_VALUE="4.58" BBK_DIFF_A="-0.23" BBK_DIFF_Y_A="-1.84"/>
      <bbk:Obs TIME_PERIOD="1976-02" OBS_VALUE="4.81" BBK_DIFF_A="-0.42" BBK_DIFF_Y_A="-1.69"/>
      <bbk:Obs TIME_PERIOD="1976-01" OBS_VALUE="5.23" BBK_DIFF_A="-0.55" BBK_DIFF_Y_A="-2.25"/>
      <bbk:Obs TIME_PERIOD="1975-12" OBS_VALUE="5.78" BBK_DIFF_A="-0.14" BBK_DIFF_Y_A="-2.87"/>
      <bbk:Obs TIME_PERIOD="1975-11" OBS_VALUE="5.92" BBK_DIFF_A="-0.33" BBK_DIFF_Y_A="-2.81"/>
      <bbk:Obs TIME_PERIOD="1975-10" OBS_VALUE="6.25" BBK_DIFF_A="0.68" BBK_DIFF_Y_A="-3.07"/>
      <bbk:Obs TIME_PERIOD="1975-09" OBS_VALUE="5.57" BBK_DIFF_A="0.23" BBK_DIFF_Y_A="-4.13"/>
      <bbk:Obs TIME_PERIOD="1975-08" OBS_VALUE="5.34" BBK_DIFF_A="-0.08" BBK_DIFF_Y_A="-4.35"/>
      <bbk:Obs TIME_PERIOD="1975-07" OBS_VALUE="5.42" BBK_DIFF_A="-0.27" BBK_DIFF_Y_A="-4.07"/>
      <bbk:Obs TIME_PERIOD="1975-06" OBS_VALUE="5.69" BBK_DIFF_A="0.11" BBK_DIFF_Y_A="-4.2"/>
      <bbk:Obs TIME_PERIOD="1975-05" OBS_VALUE="5.58" BBK_DIFF_A="-0.36" BBK_DIFF_Y_A="-3.22"/>
      <bbk:Obs TIME_PERIOD="1975-04" OBS_VALUE="5.94" BBK_DIFF_A="-0.48" BBK_DIFF_Y_A="-4.1"/>
      <bbk:Obs TIME_PERIOD="1975-03" OBS_VALUE="6.42" BBK_DIFF_A="-0.08" BBK_DIFF_Y_A="-3.63"/>
      <bbk:Obs TIME_PERIOD="1975-02" OBS_VALUE="6.5" BBK_DIFF_A="-0.98" BBK_DIFF_Y_A="-3.93"/>
      <bbk:Obs TIME_PERIOD="1975-01" OBS_VALUE="7.48" BBK_DIFF_A="-1.17" BBK_DIFF_Y_A="-1.89"/>
      <bbk:Obs TIME_PERIOD="1974-12" OBS_VALUE="8.65" BBK_DIFF_A="-0.08" BBK_DIFF_Y_A="-1.74"/>
      <bbk:Obs TIME_PERIOD="1974-11" OBS_VALUE="8.73" BBK_DIFF_A="-0.59" BBK_DIFF_Y_A="-1.46"/>
      <bbk:Obs TIME_PERIOD="1974-10" OBS_VALUE="9.32" BBK_DIFF_A="-0.38" BBK_DIFF_Y_A="0.48"/>
      <bbk:Obs TIME_PERIOD="1974-09" OBS_VALUE="9.7" BBK_DIFF_A="0.01" BBK_DIFF_Y_A="0.34"/>
      <bbk:Obs TIME_PERIOD="1974-08" OBS_VALUE="9.69" BBK_DIFF_A="0.2" BBK_DIFF_Y_A="0.54"/>
      <bbk:Obs TIME_PERIOD="1974-07" OBS_VALUE="9.49" BBK_DIFF_A="-0.4" BBK_DIFF_Y_A="-0.72"/>
      <bbk:Obs TIME_PERIOD="1974-06" OBS_VALUE="9.89" BBK_DIFF_A="1.09" BBK_DIFF_Y_A="-0.72"/>
      <bbk:Obs TIME_PERIOD="1974-05" OBS_VALUE="8.8" BBK_DIFF_A="-1.24" BBK_DIFF_Y_A="-0.15"/>
      <bbk:Obs TIME_PERIOD="1974-04" OBS_VALUE="10.04" BBK_DIFF_A="-0.01" BBK_DIFF_Y_A="1.71"/>
      <bbk:Obs TIME_PERIOD="1974-03" OBS_VALUE="10.05" BBK_DIFF_A="-0.38" BBK_DIFF_Y_A="3.08"/>
      <bbk:Obs TIME_PERIOD="1974-02" OBS_VALUE="10.43" BBK_DIFF_A="1.06" BBK_DIFF_Y_A="3.38"/>
      <bbk:Obs TIME_PERIOD="1974-01" OBS_VALUE="9.37" BBK_DIFF_A="-1.02" BBK_DIFF_Y_A="2.95"/>
      <bbk:Obs TIME_PERIOD="1973-12" OBS_VALUE="10.39" BBK_DIFF_A="0.2" BBK_DIFF_Y_A="3.47"/>
      <bbk:Obs TIME_PERIOD="1973-11" OBS_VALUE="10.19" BBK_DIFF_A="1.35" BBK_DIFF_Y_A="1.1"/>
      <bbk:Obs TIME_PERIOD="1973-10" OBS_VALUE="8.84" BBK_DIFF_A="-0.52" BBK_DIFF_Y_A="1.8"/>
      <bbk:Obs TIME_PERIOD="1973-09" OBS_VALUE="9.36" BBK_DIFF_A="0.21" BBK_DIFF_Y_A="2.66"/>
      <bbk:Obs TIME_PERIOD="1973-08" OBS_VALUE="9.15" BBK_DIFF_A="-1.06"/>
      <bbk:Obs TIME_PERIOD="1973-07" OBS_VALUE="10.21" BBK_DIFF_A="-0.4"/>
      <bbk:Obs TIME_PERIOD="1973-06" OBS_VALUE="10.61" BBK_DIFF_A="1.66"/>
      <bbk:Obs TIME_PERIOD="1973-05" OBS_VALUE="8.95" BBK_DIFF_A="0.62"/>
      <bbk:Obs TIME_PERIOD="1973-04" OBS_VALUE="8.33" BBK_DIFF_A="1.36"/>
      <bbk:Obs TIME_PERIOD="1973-03" OBS_VALUE="6.97" BBK_DIFF_A="-0.08"/>
      <bbk:Obs TIME_PERIOD="1973-02" OBS_VALUE="7.05" BBK_DIFF_A="0.63"/>
      <bbk:Obs TIME_PERIOD="1973-01" OBS_VALUE="6.42" BBK_DIFF_A="-0.5"/>
      <bbk:Obs TIME_PERIOD="1972-12" OBS_VALUE="6.92" BBK_DIFF_A="-2.17"/>
      <bbk:Obs TIME_PERIOD="1972-11" OBS_VALUE="9.09" BBK_DIFF_A="2.05"/>
      <bbk:Obs TIME_PERIOD="1972-10" OBS_VALUE="7.04" BBK_DIFF_A="0.34"/>
      <bbk:Obs TIME_PERIOD="1972-09" OBS_VALUE="6.7"/>
    </bbk:Series>
  </bbk:DataSet>
</CompactData>
