Frequencies for first 10,000 rows of mentlhlt variable in nhamcsopd1996 dataset : mental | health | couns/educ | Freq. Percent Cum. ------------+----------------------------------- 0 | 9,551 95.51 95.51 1 | 449 4.49 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016