Frequencies for first 10,000 rows of prov5040 variable in posclia2005 dataset :

   prov5040 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,990       99.90       99.90
   19950727 |          5        0.05       99.95
   19990507 |          1        0.01       99.96
   20010301 |          1        0.01       99.97
   20010807 |          1        0.01       99.98
   20031201 |          1        0.01       99.99
   20031230 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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