Frequencies for first 10,000 rows of prov2880 variable in posclia1997 dataset :

   prov2880 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,558       75.58       75.58
          1 |        752        7.52       83.10
          2 |      1,689       16.89       99.99
          3 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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