Frequencies for first 10,000 rows of mrace variable in natl1987 dataset :

    Race of |
     Mother |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         57        0.57        0.57
          1 |      6,575       65.75       66.32
          2 |      3,340       33.40       99.72
          3 |          7        0.07       99.79
          4 |         10        0.10       99.89
          5 |          1        0.01       99.90
          6 |          1        0.01       99.91
          7 |          1        0.01       99.92
          8 |          7        0.07       99.99
          9 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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