Frequencies for first 10,000 rows of prov2715 variable in posclia2005 dataset :

   prov2715 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,843       78.43       78.43
          A |      2,146       21.46       99.89
          B |         11        0.11      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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