Frequencies for first 10,000 rows of route variable in drug2016q3 dataset : The route of drug administration | Freq. Percent Cum. --------------------------------------+----------------------------------- | 2,431 24.31 24.31 Buccal | 1 0.01 24.32 Cutaneous | 3 0.03 24.35 Dental | 1 0.01 24.36 Endotracheal | 1 0.01 24.37 Epidural | 5 0.05 24.42 INTRASINAL | 1 0.01 24.43 Intra-arterial | 2 0.02 24.45 Intra-articular | 3 0.03 24.48 Intra-uterine | 9 0.09 24.57 Intradermal | 3 0.03 24.60 Intramuscular | 64 0.64 25.24 Intraperitoneal | 11 0.11 25.35 Intrathecal | 5 0.05 25.40 Intravenous (not otherwise specified) | 680 6.80 32.20 Intravenous bolus | 2 0.02 32.22 Intravenous drip | 56 0.56 32.78 Intravesical | 1 0.01 32.79 Nasal | 26 0.26 33.05 Ophthalmic | 23 0.23 33.28 Oral | 3,946 39.46 72.74 Other | 17 0.17 72.91 Parenteral | 12 0.12 73.03 Rectal | 2 0.02 73.05 Respiratory (inhalation) | 151 1.51 74.56 Subcutaneous | 293 2.93 77.49 Subdermal | 2 0.02 77.51 Sublingual | 17 0.17 77.68 Sunconjunctival | 6 0.06 77.74 Topical | 30 0.30 78.04 Transdermal | 30 0.30 78.34 Transmammary | 3 0.03 78.37 Transplacental | 366 3.66 82.03 Unknown | 1,795 17.95 99.98 Vaginal | 2 0.02 100.00 --------------------------------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 6 Apr 2017