Frequencies for first 10,000 rows of sex variable in demo2016q4 dataset :

   Code for |
  patient's |
        sex |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        579        5.79        5.79
          F |      5,371       53.71       59.50
          M |      4,045       40.45       99.95
        UNK |          5        0.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Sep 2017