Frequencies for first 10,000 rows of sex variable in nhamcsed2006 dataset :

patient sex |      Freq.     Percent        Cum.
------------+-----------------------------------
     female |      5,459       54.59       54.59
       male |      4,541       45.41      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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