Frequencies for first 10,000 rows of sex variable in nhamcsed2007 dataset :

patient sex |      Freq.     Percent        Cum.
------------+-----------------------------------
     female |      5,442       54.42       54.42
       male |      4,558       45.58      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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