Frequencies for first 10,000 rows of eniflag4 variable in mort1975 dataset :

   eniflag4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      4,024       40.24       40.24
          1 |         76        0.76       41.00
          . |      5,900       59.00      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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