Frequencies for first 10,000 rows of sex variable in natl2003 dataset :

    Sex U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          F |      4,844       48.44       48.44
          M |      5,156       51.56      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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