Frequencies for first 10,000 rows of drg4ing3 variable in nhamcsopd2004 dataset : ingredient code #3 for medication | #4 | Freq. Percent Cum. ------------------------------------+----------------------------------- caffeine | 1 0.01 0.01 niacin | 1 0.01 0.02 paracholorometaxylenol | 1 0.01 0.03 potassium replacement solutions | 1 0.01 0.04 riboflavin | 9 0.09 0.13 rubella virus vaccine | 4 0.04 0.17 salicylamide | 1 0.01 0.18 starch | 1 0.01 0.19 thiamine | 1 0.01 0.20 vitamin b complex | 2 0.02 0.22 abacavir sulfate | 2 0.02 0.24 magnesium hydroxide | 1 0.01 0.25 pseudoephedrine hcl | 1 0.01 0.26 dextroamphetamine saccharate | 3 0.03 0.29 ephedrine hcl | 1 0.01 0.30 phenylephrine hcl | 3 0.03 0.33 gymnema sylvestre | 1 0.01 0.34 butyl aminobenzoate | 4 0.04 0.38 tetanus vaccine | 3 0.03 0.41 vitamin b-6 | 1 0.01 0.42 pertussis toxin | 1 0.01 0.43 . | 9,957 99.57 100.00 ------------------------------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016