Frequencies for first 10,000 rows of prov2715 variable in posclia1998 dataset :

   prov2715 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,577       75.77       75.77
          A |      2,403       24.03       99.80
          B |         20        0.20      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 26 Jan 2016