Frequencies for first 10,000 rows of mrace variable in natl1981 dataset :

    Race of |
     Mother |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         40        0.40        0.40
          1 |      6,482       64.82       65.22
          2 |      3,468       34.68       99.90
          3 |          4        0.04       99.94
          4 |          2        0.02       99.96
          5 |          2        0.02       99.98
          6 |          1        0.01       99.99
          8 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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