Frequencies for first 10,000 rows of rx9v2c3 variable in namcs2012 dataset : For RX9, | level 2 of | MULTUM drug | category #3 | Freq. Percent Cum. ------------+----------------------------------- | 9,990 99.90 99.90 064 | 2 0.02 99.92 065 | 3 0.03 99.95 265 | 2 0.02 99.97 270 | 2 0.02 99.99 433 | 1 0.01 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016