Frequencies for first 10,000 rows of route variable in drug2009q3 dataset : The route of drug | administration | Freq. Percent Cum. -----------------------------+----------------------------------- | 4,249 42.49 42.49 BUCCAL | 2 0.02 42.51 CUTANEOUS | 2 0.02 42.53 INTRA-ARTERIAL | 9 0.09 42.62 INTRA-ARTICULAR | 2 0.02 42.64 INTRA-UTERINE | 28 0.28 42.92 INTRACAVERNOUS | 1 0.01 42.93 INTRADISCAL (INTRASPINAL) | 1 0.01 42.94 INTRAMENINGEAL | 1 0.01 42.95 INTRAMUSCULAR | 153 1.53 44.48 INTRAOCULAR | 21 0.21 44.69 INTRAPERITONEAL | 12 0.12 44.81 INTRATHECAL | 6 0.06 44.87 INTRATRACHEAL | 1 0.01 44.88 INTRAVENOUS | 714 7.14 52.02 INTRAVENOUS BOLUS | 3 0.03 52.05 INTRAVENOUS DRIP | 57 0.57 52.62 INTRAVESICAL | 3 0.03 52.65 NASAL | 18 0.18 52.83 OPHTHALMIC | 18 0.18 53.01 ORAL | 3,165 31.65 84.66 OTHER | 6 0.06 84.72 PARENTERAL | 19 0.19 84.91 RECTAL | 5 0.05 84.96 RESPIRATORY (INHALATION) | 84 0.84 85.80 SUBCUTANEOUS | 354 3.54 89.34 SUBLINGUAL | 19 0.19 89.53 TOPICAL | 33 0.33 89.86 TRANSDERMAL | 106 1.06 90.92 TRANSPLACENTAL | 38 0.38 91.30 UNKNOWN | 866 8.66 99.96 VAGINAL | 4 0.04 100.00 -----------------------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 18 Dec 2015