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

   death_yr |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      6,049       60.49       60.49
       1998 |      3,937       39.37       99.86
       1999 |          5        0.05       99.91
       9999 |          9        0.09      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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