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

        sex |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      6,472       64.72       64.72
          2 |      3,223       32.23       96.95
          9 |        305        3.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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