Frequencies for first 10,000 rows of sex variable in nhamcsed2011 dataset :

Patient Sex |      Freq.     Percent        Cum.
------------+-----------------------------------
     Female |      5,359       53.59       53.59
       Male |      4,641       46.41      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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