Frequencies for first 10,000 rows of prov4030 variable in posclia1998 dataset :

   prov4030 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      5,590       55.90       55.90
          N |      3,998       39.98       95.88
          Y |        412        4.12      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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