Frequencies for first 10,000 rows of prov0220 variable in posclia1998 dataset :

   prov0220 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,451       84.51       84.51
          1 |      1,549       15.49      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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