Frequencies for first 10,000 rows of route variable in drug2015q2 dataset : The route of drug administration | Freq. Percent Cum. --------------------------------------+----------------------------------- | 2,386 23.86 23.86 Endotracheal | 1 0.01 23.87 Epidural | 1 0.01 23.88 Intra-uterine | 14 0.14 24.02 Intracavernous | 2 0.02 24.04 Intramuscular | 265 2.65 26.69 Intraocular | 3 0.03 26.72 Intraperitoneal | 2 0.02 26.74 Intrathecal | 3 0.03 26.77 Intratracheal | 2 0.02 26.79 Intravenous (not otherwise specified) | 1,143 11.43 38.22 Intravenous bolus | 12 0.12 38.34 Intravenous drip | 53 0.53 38.87 Nasal | 20 0.20 39.07 Ophthalmic | 14 0.14 39.21 Oral | 3,423 34.23 73.44 Other | 37 0.37 73.81 Parenteral | 3 0.03 73.84 Rectal | 8 0.08 73.92 Respiratory (inhalation) | 144 1.44 75.36 Subcutaneous | 243 2.43 77.79 Sublingual | 7 0.07 77.86 Sunconjunctival | 1 0.01 77.87 Topical | 27 0.27 78.14 Transdermal | 127 1.27 79.41 Transmammary | 6 0.06 79.47 Transplacental | 352 3.52 82.99 Unknown | 1,699 16.99 99.98 Vaginal | 2 0.02 100.00 --------------------------------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 19 Apr 2017