Frequencies for first 10,000 rows of prov4225 variable in posclia1998 dataset :

   prov4225 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,994       99.94       99.94
          X |          6        0.06      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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