Frequencies for first 10,000 rows of prov4990 variable in posclia1999 dataset :

   prov4990 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,762       97.62       97.62
          Y |        238        2.38      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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