Frequencies for first 10,000 rows of route variable in drug2004q2 dataset : The route of drug | administration | Freq. Percent Cum. -----------------------------+----------------------------------- | 5,348 53.48 53.48 AURICULAR (OTIC) | 1 0.01 53.49 BUCCAL | 3 0.03 53.52 EPIDURAL | 3 0.03 53.55 INTRA CORPUS CAVERNOSUM | 1 0.01 53.56 INTRA-ARTERIAL | 2 0.02 53.58 INTRA-UTERINE | 11 0.11 53.69 INTRACAVERNOUS | 3 0.03 53.72 INTRADERMAL | 2 0.02 53.74 INTRAMUSCULAR | 119 1.19 54.93 INTRAOCULAR | 1 0.01 54.94 INTRATHECAL | 17 0.17 55.11 INTRATHORACIC | 2 0.02 55.13 INTRATRACHEAL | 2 0.02 55.15 INTRATUMOR | 1 0.01 55.16 INTRAVENOUS | 521 5.21 60.37 INTRAVENOUS BOLUS | 5 0.05 60.42 INTRAVENOUS DRIP | 49 0.49 60.91 INTRAVESICAL | 2 0.02 60.93 NASAL | 20 0.20 61.13 OPHTHALMIC | 24 0.24 61.37 ORAL | 2,420 24.20 85.57 OROPHARINGEAL | 1 0.01 85.58 OTHER | 3 0.03 85.61 PARENTERAL | 9 0.09 85.70 RECTAL | 7 0.07 85.77 RESPIRATORY (INHALATION) | 437 4.37 90.14 SUBCUTANEOUS | 126 1.26 91.40 SUBLINGUAL | 1 0.01 91.41 TOPICAL | 29 0.29 91.70 TRANSDERMAL | 31 0.31 92.01 TRANSPLACENTAL | 20 0.20 92.21 UNKNOWN | 778 7.78 99.99 VAGINAL | 1 0.01 100.00 -----------------------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 18 Dec 2015