Frequencies for first 10,000 rows of racer variable in nhamcsopd2009 dataset : white/black | /other race | (imputed) | Freq. Percent Cum. ------------+----------------------------------- white | 6,748 67.48 67.48 black | 2,631 26.31 93.79 other | 621 6.21 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016