Frequencies for first 10,000 rows of mbrace variable in linkpe2009psden dataset :

   Mother's |
    Bridged |
   Race U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      5,867       58.67       58.67
          2 |        710        7.10       65.77
          8 |          1        0.01       65.78
          . |      3,422       34.22      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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