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      <bbk:Obs TIME_PERIOD="1976-05" OBS_VALUE="6.08" BBK_DIFF_A="0.52" BBK_DIFF_Y_A="-0.2"/>
      <bbk:Obs TIME_PERIOD="1976-04" OBS_VALUE="5.56" BBK_DIFF_A="0.0" BBK_DIFF_Y_A="-1.01"/>
      <bbk:Obs TIME_PERIOD="1976-03" OBS_VALUE="5.56" BBK_DIFF_A="-0.06" BBK_DIFF_Y_A="-1.37"/>
      <bbk:Obs TIME_PERIOD="1976-02" OBS_VALUE="5.62" BBK_DIFF_A="-0.41" BBK_DIFF_Y_A="-1.3"/>
      <bbk:Obs TIME_PERIOD="1976-01" OBS_VALUE="6.03" BBK_DIFF_A="-0.35" BBK_DIFF_Y_A="-1.52"/>
      <bbk:Obs TIME_PERIOD="1975-12" OBS_VALUE="6.38" BBK_DIFF_A="-0.11" BBK_DIFF_Y_A="-2.38"/>
      <bbk:Obs TIME_PERIOD="1975-11" OBS_VALUE="6.49" BBK_DIFF_A="0.02" BBK_DIFF_Y_A="-2.34"/>
      <bbk:Obs TIME_PERIOD="1975-10" OBS_VALUE="6.47" BBK_DIFF_A="0.07" BBK_DIFF_Y_A="-3.15"/>
      <bbk:Obs TIME_PERIOD="1975-09" OBS_VALUE="6.4" BBK_DIFF_A="0.05" BBK_DIFF_Y_A="-3.38"/>
      <bbk:Obs TIME_PERIOD="1975-08" OBS_VALUE="6.35" BBK_DIFF_A="0.05" BBK_DIFF_Y_A="-3.43"/>
      <bbk:Obs TIME_PERIOD="1975-07" OBS_VALUE="6.3" BBK_DIFF_A="-0.16" BBK_DIFF_Y_A="-3.32"/>
      <bbk:Obs TIME_PERIOD="1975-06" OBS_VALUE="6.46" BBK_DIFF_A="0.18" BBK_DIFF_Y_A="-3.12"/>
      <bbk:Obs TIME_PERIOD="1975-05" OBS_VALUE="6.28" BBK_DIFF_A="-0.29" BBK_DIFF_Y_A="-3.54"/>
      <bbk:Obs TIME_PERIOD="1975-04" OBS_VALUE="6.57" BBK_DIFF_A="-0.36" BBK_DIFF_Y_A="-3.45"/>
      <bbk:Obs TIME_PERIOD="1975-03" OBS_VALUE="6.93" BBK_DIFF_A="0.01" BBK_DIFF_Y_A="-3.06"/>
      <bbk:Obs TIME_PERIOD="1975-02" OBS_VALUE="6.92" BBK_DIFF_A="-0.63" BBK_DIFF_Y_A="-3.24"/>
      <bbk:Obs TIME_PERIOD="1975-01" OBS_VALUE="7.55" BBK_DIFF_A="-1.21" BBK_DIFF_Y_A="-1.71"/>
      <bbk:Obs TIME_PERIOD="1974-12" OBS_VALUE="8.76" BBK_DIFF_A="-0.07" BBK_DIFF_Y_A="-0.76"/>
      <bbk:Obs TIME_PERIOD="1974-11" OBS_VALUE="8.83" BBK_DIFF_A="-0.79" BBK_DIFF_Y_A="-0.79"/>
      <bbk:Obs TIME_PERIOD="1974-10" OBS_VALUE="9.62" BBK_DIFF_A="-0.16" BBK_DIFF_Y_A="0.4"/>
      <bbk:Obs TIME_PERIOD="1974-09" OBS_VALUE="9.78" BBK_DIFF_A="0.0" BBK_DIFF_Y_A="0.31"/>
      <bbk:Obs TIME_PERIOD="1974-08" OBS_VALUE="9.78" BBK_DIFF_A="0.16" BBK_DIFF_Y_A="0.49"/>
      <bbk:Obs TIME_PERIOD="1974-07" OBS_VALUE="9.62" BBK_DIFF_A="0.04" BBK_DIFF_Y_A="-0.63"/>
      <bbk:Obs TIME_PERIOD="1974-06" OBS_VALUE="9.58" BBK_DIFF_A="-0.24" BBK_DIFF_Y_A="0.42"/>
      <bbk:Obs TIME_PERIOD="1974-05" OBS_VALUE="9.82" BBK_DIFF_A="-0.2" BBK_DIFF_Y_A="0.5"/>
      <bbk:Obs TIME_PERIOD="1974-04" OBS_VALUE="10.02" BBK_DIFF_A="0.03" BBK_DIFF_Y_A="1.35"/>
      <bbk:Obs TIME_PERIOD="1974-03" OBS_VALUE="9.99" BBK_DIFF_A="-0.17" BBK_DIFF_Y_A="2.2"/>
      <bbk:Obs TIME_PERIOD="1974-02" OBS_VALUE="10.16" BBK_DIFF_A="0.9" BBK_DIFF_Y_A="2.92"/>
      <bbk:Obs TIME_PERIOD="1974-01" OBS_VALUE="9.26" BBK_DIFF_A="-0.26" BBK_DIFF_Y_A="1.97"/>
      <bbk:Obs TIME_PERIOD="1973-12" OBS_VALUE="9.52" BBK_DIFF_A="-0.1" BBK_DIFF_Y_A="1.5"/>
      <bbk:Obs TIME_PERIOD="1973-11" OBS_VALUE="9.62" BBK_DIFF_A="0.4" BBK_DIFF_Y_A="1.69"/>
      <bbk:Obs TIME_PERIOD="1973-10" OBS_VALUE="9.22" BBK_DIFF_A="-0.25" BBK_DIFF_Y_A="1.56"/>
      <bbk:Obs TIME_PERIOD="1973-09" OBS_VALUE="9.47" BBK_DIFF_A="0.18" BBK_DIFF_Y_A="3.2"/>
      <bbk:Obs TIME_PERIOD="1973-08" OBS_VALUE="9.29" BBK_DIFF_A="-0.96"/>
      <bbk:Obs TIME_PERIOD="1973-07" OBS_VALUE="10.25" BBK_DIFF_A="1.09"/>
      <bbk:Obs TIME_PERIOD="1973-06" OBS_VALUE="9.16" BBK_DIFF_A="-0.16"/>
      <bbk:Obs TIME_PERIOD="1973-05" OBS_VALUE="9.32" BBK_DIFF_A="0.65"/>
      <bbk:Obs TIME_PERIOD="1973-04" OBS_VALUE="8.67" BBK_DIFF_A="0.88"/>
      <bbk:Obs TIME_PERIOD="1973-03" OBS_VALUE="7.79" BBK_DIFF_A="0.55"/>
      <bbk:Obs TIME_PERIOD="1973-02" OBS_VALUE="7.24" BBK_DIFF_A="-0.05"/>
      <bbk:Obs TIME_PERIOD="1973-01" OBS_VALUE="7.29" BBK_DIFF_A="-0.73"/>
      <bbk:Obs TIME_PERIOD="1972-12" OBS_VALUE="8.02" BBK_DIFF_A="0.09"/>
      <bbk:Obs TIME_PERIOD="1972-11" OBS_VALUE="7.93" BBK_DIFF_A="0.27"/>
      <bbk:Obs TIME_PERIOD="1972-10" OBS_VALUE="7.66" BBK_DIFF_A="1.39"/>
      <bbk:Obs TIME_PERIOD="1972-09" OBS_VALUE="6.27"/>
    </bbk:Series>
  </bbk:DataSet>
</CompactData>
