Frequencies for first 10,000 rows of medicaid variable in nhamcsopd1996 dataset : medicaid | Freq. Percent Cum. ------------+----------------------------------- 0 | 6,233 62.33 62.33 1 | 3,767 37.67 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016