Frequencies for purs_ecx variable in fmli011 dataset :

   purs_ecx |      Freq.     Percent        Cum.
------------+-----------------------------------
          A |      7,459       96.72       96.72
          B |          9        0.12       96.84
          C |        131        1.70       98.53
          D |        108        1.40       99.94
          T |          5        0.06      100.00
------------+-----------------------------------
      Total |      7,712      100.00

by Jean Roth , jroth@nber.org , 17 Mar 2016