Frequencies for first 10,000 rows of sex variable in natl2017 dataset :

     Sex of |
   Infant M |
       Male |      Freq.     Percent        Cum.
------------+-----------------------------------
          F |      4,887       48.87       48.87
          M |      5,113       51.13      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 19 Sep 2018