Frequencies for first 10,000 rows of prov0220 variable in posclia1997 dataset :

   prov0220 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,307       83.07       83.07
          1 |      1,693       16.93      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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