Frequencies for first 10,000 rows of sex variable in nhamcsopd1992 dataset :

Patient sex |      Freq.     Percent        Cum.
------------+-----------------------------------
     Female |      6,355       63.55       63.55
       Male |      3,645       36.45      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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