Frequencies for first 10,000 rows of route variable in drug2009q1 dataset : The route of drug | administration | Freq. Percent Cum. -----------------------------+----------------------------------- | 4,350 43.50 43.50 AURICULAR (OTIC) | 1 0.01 43.51 BUCCAL | 4 0.04 43.55 EPIDURAL | 1 0.01 43.56 INTRA-ARTERIAL | 7 0.07 43.63 INTRA-UTERINE | 166 1.66 45.29 INTRACARDIAC | 1 0.01 45.30 INTRACAVERNOUS | 1 0.01 45.31 INTRADERMAL | 2 0.02 45.33 INTRAMUSCULAR | 180 1.80 47.13 INTRAOCULAR | 15 0.15 47.28 INTRAPERITONEAL | 10 0.10 47.38 INTRATHECAL | 7 0.07 47.45 INTRAVENOUS | 703 7.03 54.48 INTRAVENOUS BOLUS | 3 0.03 54.51 INTRAVENOUS DRIP | 56 0.56 55.07 INTRAVESICAL | 6 0.06 55.13 NASAL | 5 0.05 55.18 OPHTHALMIC | 21 0.21 55.39 ORAL | 2,973 29.73 85.12 OTHER | 7 0.07 85.19 PARENTERAL | 16 0.16 85.35 RECTAL | 11 0.11 85.46 RESPIRATORY (INHALATION) | 137 1.37 86.83 SUBCUTANEOUS | 300 3.00 89.83 SUBDERMAL | 1 0.01 89.84 SUBLINGUAL | 25 0.25 90.09 TOPICAL | 44 0.44 90.53 TRANSDERMAL | 112 1.12 91.65 TRANSMAMMARY | 2 0.02 91.67 TRANSPLACENTAL | 44 0.44 92.11 UNKNOWN | 787 7.87 99.98 VAGINAL | 2 0.02 100.00 -----------------------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 18 Dec 2015