Frequencies for stdn_yrb variable in fmli132 dataset :

   stdn_yrb |      Freq.     Percent        Cum.
------------+-----------------------------------
          A |      6,725       99.45       99.45
          C |          5        0.07       99.53
          D |         32        0.47      100.00
------------+-----------------------------------
      Total |      6,762      100.00

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