Frequencies for first 10,000 rows of frace variable in natl2008 dataset :

   Father's |
     Race U |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      5,726       57.26       57.26
          2 |      1,975       19.75       77.01
          3 |         28        0.28       77.29
          4 |         18        0.18       77.47
          5 |          4        0.04       77.51
          6 |          1        0.01       77.52
          7 |          6        0.06       77.58
         78 |         77        0.77       78.35
         99 |      2,165       21.65      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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