Frequencies for first 10,000 rows of prov5040 variable in posclia2000 dataset :

   prov5040 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,980       99.80       99.80
   19950727 |         19        0.19       99.99
   19990507 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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