Frequencies for first 10,000 rows of prov4190 variable in posclia1997 dataset :

   prov4190 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,984       79.84       79.84
          N |      1,769       17.69       97.53
          Y |        247        2.47      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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