Frequencies for first 10,000 rows of mrace variable in natl1974 dataset :

    Race of |
     Mother |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      6,508       65.08       65.08
          2 |      3,428       34.28       99.36
          3 |          1        0.01       99.37
          4 |          2        0.02       99.39
          5 |          5        0.05       99.44
          7 |         19        0.19       99.63
          8 |          3        0.03       99.66
          9 |         34        0.34      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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