Frequencies for first 10,000 rows of rx8v3c3 variable in nhamcsopd2011 dataset : For RX8, | level 3 of | MULTUM drug | category #3 | (detailed | level) | Freq. Percent Cum. ------------+----------------------------------- | 9,989 99.89 99.89 197 | 3 0.03 99.92 203 | 8 0.08 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016