Frequencies for first 10,000 rows of mbrace variable in natlterr2005 dataset :

   Mother's |
    Bridged |
Race** R*** |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          1        0.01        0.01
          1 |      3,395       33.95       33.96
          2 |        349        3.49       37.45
          . |      6,255       62.55      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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