Frequencies for first 10,000 rows of sex variable in nhamcsed2009 dataset :

patient sex |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      5,424       54.24       54.24
          2 |      4,576       45.76      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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