Frequencies for first 10,000 rows of drg8ing2 variable in nhamcsed2004 dataset : ingredient code #2 for medication | #8 | Freq. Percent Cum. ------------------------------------+----------------------------------- guaifenesin | 1 0.01 0.01 levodopa | 1 0.01 0.02 menthol | 1 0.01 0.03 mumps virus vaccine | 1 0.01 0.04 niacin | 1 0.01 0.05 pyridoxine | 1 0.01 0.06 riboflavin | 1 0.01 0.07 salicylic acid | 1 0.01 0.08 triamterene | 1 0.01 0.09 vitamin c | 1 0.01 0.10 salmeterol | 1 0.01 0.11 irbesartan | 1 0.01 0.12 magnesium hydroxide | 1 0.01 0.13 propoxyphene napsylate | 3 0.03 0.16 hydrocodone bitartrate | 8 0.08 0.24 phenylpropanolamine hcl | 1 0.01 0.25 pseudoephedrine hcl | 1 0.01 0.26 oxycodone hcl | 2 0.02 0.28 tramadol hcl | 1 0.01 0.29 triamcinolone acetonide | 1 0.01 0.30 clavulanate potassium | 1 0.01 0.31 albuterol sulfate | 4 0.04 0.35 timolol maleate | 1 0.01 0.36 pyrilamine maleate | 1 0.01 0.37 promethazine hcl | 1 0.01 0.38 . | 9,962 99.62 100.00 ------------------------------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016