Frequencies for first 10,000 rows of dme variable in nhamcsopd2005 dataset : durable | medical | equipment | Freq. Percent Cum. ------------+----------------------------------- no | 9,907 99.07 99.07 yes | 93 0.93 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016