Frequencies for first 10,000 rows of prov2715 variable in posclia2004 dataset :

   prov2715 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,877       78.77       78.77
          A |      2,114       21.14       99.91
          B |          9        0.09      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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