Frequencies for first 10,000 rows of death_yr variable in person dataset :

   death_yr |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,980       59.80       59.80
         97 |      4,010       40.10       99.90
         98 |          8        0.08       99.98
         99 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2016