Frequencies for first 10,000 rows of sex variable in nhamcsed2004 dataset :

patient sex |      Freq.     Percent        Cum.
------------+-----------------------------------
     female |      5,444       54.44       54.44
       male |      4,556       45.56      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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