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

        Sex |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      7,210       72.10       72.10
          2 |      2,775       27.75       99.85
          9 |         15        0.15      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Apr 2016