Frequencies for first 10,000 rows of rnifla_1 variable in mort1975 dataset :

   rnifla_1 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |     10,000      100.00      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Dec 2015