Frequencies for first 10,000 rows of prov1620 variable in posclia1997 dataset :

   prov1620 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,687       96.87       96.87
      00520 |        313        3.13      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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