Frequencies for first 10,000 rows of sex variable in natl2005 dataset :

    Sex U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          F |      4,816       48.16       48.16
          M |      5,184       51.84      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Dec 2015