Frequencies for first 10,000 rows of mentlhlt variable in nhamcsopd2000 dataset : mental | health | couns/educ | Freq. Percent Cum. ------------+----------------------------------- 0 | 9,696 96.96 96.96 1 | 304 3.04 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016