Frequencies for first 10,000 rows of sex variable in nhamcsed1999 dataset :

patient sex |      Freq.     Percent        Cum.
------------+-----------------------------------
     Female |      5,161       51.61       51.61
       Male |      4,839       48.39      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016