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

        Sex |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      6,690       66.90       66.90
          2 |      2,995       29.95       96.85
          9 |        315        3.15      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2016