Frequencies for first 10,000 rows of sex variable in demo2016q2 dataset :

   Code for |
  patient's |
        sex |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        784        7.84        7.84
          F |      5,279       52.79       60.63
          M |      3,936       39.36       99.99
        UNK |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 6 Apr 2017