Frequencies for first 10,000 rows of prov5040 variable in posclia2001 dataset :

   prov5040 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,989       99.89       99.89
   19950727 |          7        0.07       99.96
   19990507 |          1        0.01       99.97
   20010301 |          1        0.01       99.98
   20010807 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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