Frequencies for first 10,000 rows of fbrace variable in natl2013 dataset :

   Father's |
    Bridged |
   Race R** |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      5,797       57.97       57.97
          2 |        480        4.80       62.77
          3 |      1,276       12.76       75.53
          4 |         20        0.20       75.73
          5 |         13        0.13       75.86
          6 |        159        1.59       77.45
          7 |          7        0.07       77.52
          8 |         22        0.22       77.74
          9 |         14        0.14       77.88
         10 |        204        2.04       79.92
         11 |         11        0.11       80.03
         12 |          3        0.03       80.06
         13 |        161        1.61       81.67
         14 |         45        0.45       82.12
         21 |        191        1.91       84.03
         22 |         71        0.71       84.74
         23 |        240        2.40       87.14
         24 |         83        0.83       87.97
         99 |      1,203       12.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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