Frequencies for first 10,000 rows of frace variable in natl2009 dataset :

   Father's |
     Race U |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      6,370       63.70       63.70
          2 |      1,272       12.72       76.42
          3 |        239        2.39       78.81
          4 |         23        0.23       79.04
          5 |          4        0.04       79.08
          6 |          3        0.03       79.11
          7 |         23        0.23       79.34
         78 |        142        1.42       80.76
         99 |      1,924       19.24      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Dec 2015