Frequencies for first 10,000 rows of prov4030 variable in posclia1997 dataset :

   prov4030 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      5,279       52.79       52.79
          N |      4,270       42.70       95.49
          Y |        451        4.51      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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