Frequencies for first 10,000 rows of frace variable in natl1987 dataset : Race of | Father | Freq. Percent Cum. ------------+----------------------------------- 0 | 31 0.31 0.31 1 | 5,907 59.07 59.38 2 | 1,215 12.15 71.53 3 | 6 0.06 71.59 4 | 7 0.07 71.66 5 | 2 0.02 71.68 8 | 4 0.04 71.72 9 | 2,828 28.28 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 3 Jan 2016