Frequencies for first 10,000 rows of prov4175 variable in posclia1999 dataset :

   prov4175 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      1,978       19.78       19.78
          N |      7,533       75.33       95.11
          Y |        489        4.89      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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