Frequencies for first 10,000 rows of sex variable in nhamcsopd2004 dataset :

patient sex |      Freq.     Percent        Cum.
------------+-----------------------------------
     female |      6,253       62.53       62.53
       male |      3,747       37.47      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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