Frequencies for first 10,000 rows of rnifla_4 variable in mort1975 dataset :

   rnifla_4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      3,634       36.34       36.34
          1 |        130        1.30       37.64
          . |      6,236       62.36      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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