Frequencies for first 10,000 rows of rx10v3c2 variable in nhamcsed2013 dataset : For RX10, | level 3 of | MULTUM drug | category #2 | (detailed | level) | Freq. Percent Cum. ------------+----------------------------------- | 9,993 99.93 99.93 196 | 2 0.02 99.95 198 | 2 0.02 99.97 203 | 1 0.01 99.98 211 | 1 0.01 99.99 388 | 1 0.01 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 7 Nov 2016