Frequencies for first 10,000 rows of prov1620 variable in posclia2001 dataset :

   prov1620 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,773       97.73       97.73
      00520 |        213        2.13       99.86
      01030 |         14        0.14      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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