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

      Death |
  Date-Year |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,633       56.33       56.33
         79 |      4,364       43.64       99.97
         80 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Apr 2016