Frequencies for first 10,000 rows of mbrace variable in natlterr2012 dataset :

   Mother's |
    Bridged |
Race** R*** |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      3,922       39.22       39.22
          2 |        550        5.50       44.72
          3 |         15        0.15       44.87
          4 |          9        0.09       44.96
          5 |        403        4.03       48.99
          6 |        841        8.41       57.40
          7 |         50        0.50       57.90
          8 |        148        1.48       59.38
          9 |         11        0.11       59.49
         10 |         29        0.29       59.78
         11 |          5        0.05       59.83
         12 |      1,663       16.63       76.46
         13 |          4        0.04       76.50
         14 |      1,093       10.93       87.43
         24 |         94        0.94       88.37
          . |      1,163       11.63      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 5 May 2016