Frequencies for stud_inx variable in fmli132 dataset :

   stud_inx |      Freq.     Percent        Cum.
------------+-----------------------------------
          A |      6,513       96.32       96.32
          C |        102        1.51       97.83
          D |        147        2.17      100.00
------------+-----------------------------------
      Total |      6,762      100.00

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