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

        Sex |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      6,774       67.74       67.74
          2 |      2,974       29.74       97.48
          9 |        252        2.52      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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