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

        sex |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      6,331       63.31       63.31
          2 |      3,302       33.02       96.33
          9 |        367        3.67      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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