Frequencies for first 10,000 rows of prov2715 variable in posclia2003 dataset :

   prov2715 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,914       79.14       79.14
          A |      2,078       20.78       99.92
          B |          8        0.08      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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