Frequencies for first 10,000 rows of prov4225 variable in posclia2003 dataset :

   prov4225 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,998       99.98       99.98
          X |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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