Frequencies for first 10,000 rows of prov2880 variable in posclia2001 dataset :

   prov2880 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,960       79.60       79.60
          1 |        490        4.90       84.50
          2 |      1,549       15.49       99.99
          3 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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