Frequencies for first 10,000 rows of mrace variable in natl1969 dataset :

    Race of |
     Mother |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      6,721       67.21       67.21
          2 |      3,184       31.84       99.05
          3 |          1        0.01       99.06
          4 |          1        0.01       99.07
          5 |          2        0.02       99.09
          7 |         48        0.48       99.57
          8 |         29        0.29       99.86
          9 |         14        0.14      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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