Frequencies for first 10,000 rows of sex variable in demo2010q3 dataset :

   Code for |
  patient's |
        sex |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        722        7.22        7.22
          F |      5,610       56.10       63.32
          M |      3,666       36.66       99.98
        UNK |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Dec 2015