Frequencies for first 10,000 rows of mrace variable in linkco1991us_num dataset :

    Race of |
     Mother |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      6,448       64.48       64.48
          2 |      3,018       30.18       94.66
          3 |        148        1.48       96.14
          4 |         51        0.51       96.65
          5 |         10        0.10       96.75
          6 |          6        0.06       96.81
          7 |         94        0.94       97.75
          8 |        218        2.18       99.93
          9 |          7        0.07      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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