Frequencies for first 10,000 rows of route variable in drug2009q4 dataset : The route of drug | administration | Freq. Percent Cum. -----------------------------+----------------------------------- | 4,897 48.97 48.97 BUCCAL | 1 0.01 48.98 EPIDURAL | 5 0.05 49.03 INTRA-ARTERIAL | 3 0.03 49.06 INTRA-ARTICULAR | 15 0.15 49.21 INTRA-UTERINE | 79 0.79 50.00 INTRACAVERNOUS | 2 0.02 50.02 INTRACEREBRAL | 1 0.01 50.03 INTRACORONARY | 1 0.01 50.04 INTRAMENINGEAL | 2 0.02 50.06 INTRAMUSCULAR | 135 1.35 51.41 INTRAOCULAR | 9 0.09 51.50 INTRAPERITONEAL | 83 0.83 52.33 INTRATHECAL | 28 0.28 52.61 INTRAVENOUS | 513 5.13 57.74 INTRAVENOUS BOLUS | 21 0.21 57.95 INTRAVENOUS DRIP | 49 0.49 58.44 INTRAVESICAL | 1 0.01 58.45 NASAL | 14 0.14 58.59 OPHTHALMIC | 10 0.10 58.69 ORAL | 3,005 30.05 88.74 OROPHARINGEAL | 1 0.01 88.75 OTHER | 6 0.06 88.81 PARENTERAL | 6 0.06 88.87 PERINEURAL | 1 0.01 88.88 RECTAL | 6 0.06 88.94 RESPIRATORY (INHALATION) | 91 0.91 89.85 SUBCUTANEOUS | 287 2.87 92.72 SUBLINGUAL | 14 0.14 92.86 TOPICAL | 28 0.28 93.14 TRANSDERMAL | 63 0.63 93.77 TRANSPLACENTAL | 27 0.27 94.04 UNKNOWN | 592 5.92 99.96 VAGINAL | 4 0.04 100.00 -----------------------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 18 Dec 2015