Frequencies for first 10,000 rows of rx8v3c3 variable in nhamcsed2015 dataset : For RX8, | level 3 of | MULTUM drug | category #3 | (detailed | level) | Freq. Percent Cum. ------------+----------------------------------- | 9,992 99.92 99.92 197 | 3 0.03 99.95 203 | 3 0.03 99.98 204 | 2 0.02 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 20 Nov 2017