Frequencies for first 10,000 rows of mbrace variable in natlterr2008 dataset :

   Mother's |
    Bridged |
Race** R*** |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      3,547       35.47       35.47
          2 |        391        3.91       39.38
          5 |          1        0.01       39.39
          . |      6,061       60.61      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 3 May 2016