Frequencies for first 10,000 rows of frace variable in natl1972 dataset : Race of | Father | Freq. Percent Cum. ------------+----------------------------------- 1 | 6,417 64.17 64.17 2 | 1,884 18.84 83.01 3 | 1 0.01 83.02 4 | 1 0.01 83.03 5 | 2 0.02 83.05 7 | 17 0.17 83.22 8 | 1 0.01 83.23 9 | 1,677 16.77 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 3 Jan 2016