Frequencies for first 10,000 rows of rx8v3c4 variable in nhamcsopd2011 dataset : For RX8, | level 3 of | MULTUM drug | category #4 | (detailed | level) | Freq. Percent Cum. ------------+----------------------------------- | 9,996 99.96 99.96 205 | 3 0.03 99.99 445 | 1 0.01 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016