Frequencies for first 10,000 rows of fbrace variable in natlterr2007 dataset :

   Father's |
    Bridged |
   Race R** |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      3,230       32.30       32.30
          2 |        435        4.35       36.65
         99 |        172        1.72       38.37
          . |      6,163       61.63      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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