Frequencies for first 10,000 rows of crace variable in natl1977 dataset :

    Race of |
      Child |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      6,466       64.66       64.66
          2 |      3,500       35.00       99.66
          3 |          2        0.02       99.68
          4 |          3        0.03       99.71
          7 |         23        0.23       99.94
          8 |          6        0.06      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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