Frequencies for first 10,000 rows of mbrace variable in natl2014 dataset :

    Bridged |
Race Mother |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      6,420       64.20       64.20
          2 |        463        4.63       68.83
          3 |      2,120       21.20       90.03
          4 |        997        9.97      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 15 Jun 2016