Frequencies for first 10,000 rows of sex variable in demo2008q3 dataset :

   Code for |
  patient's |
        sex |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        707        7.07        7.07
          F |      5,518       55.18       62.25
          M |      3,769       37.69       99.94
         NS |          4        0.04       99.98
        UNK |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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