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

      Death |
  Date-Year |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,734       57.34       57.34
         77 |      4,260       42.60       99.94
         78 |          6        0.06      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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