Frequencies for first 10,000 rows of emt variable in nhamcsed2000 dataset : emergency | medical | technician | seen | Freq. Percent Cum. ------------+----------------------------------- 0 | 9,546 95.46 95.46 1 | 454 4.54 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016