Frequencies for first 10,000 rows of prov2715 variable in posclia1997 dataset :

   prov2715 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,558       75.58       75.58
          A |      2,427       24.27       99.85
          B |         15        0.15      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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