Frequencies for first 10,000 rows of sex variable in demo2010q1 dataset :

   Code for |
  patient's |
        sex |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        549        5.49        5.49
          F |      5,593       55.93       61.42
          M |      3,855       38.55       99.97
         NS |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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