Frequencies for first 10,000 rows of route variable in drug2007q2 dataset : The route of drug | administration | Freq. Percent Cum. -----------------------------+----------------------------------- | 3,576 35.76 35.76 BUCCAL | 6 0.06 35.82 INTRA-UTERINE | 7 0.07 35.89 INTRACEREBRAL | 3 0.03 35.92 INTRADERMAL | 1 0.01 35.93 INTRAMUSCULAR | 51 0.51 36.44 INTRAOCULAR | 2 0.02 36.46 INTRAPERITONEAL | 32 0.32 36.78 INTRATHECAL | 15 0.15 36.93 INTRAVENOUS | 705 7.05 43.98 INTRAVENOUS BOLUS | 3 0.03 44.01 INTRAVENOUS DRIP | 92 0.92 44.93 INTRAVESICAL | 12 0.12 45.05 NASAL | 14 0.14 45.19 OPHTHALMIC | 17 0.17 45.36 ORAL | 4,066 40.66 86.02 OROPHARINGEAL | 1 0.01 86.03 OTHER | 18 0.18 86.21 PARENTERAL | 6 0.06 86.27 RECTAL | 18 0.18 86.45 RESPIRATORY (INHALATION) | 98 0.98 87.43 SUBCUTANEOUS | 219 2.19 89.62 SUBLINGUAL | 7 0.07 89.69 TOPICAL | 41 0.41 90.10 TRANSDERMAL | 52 0.52 90.62 TRANSMAMMARY | 2 0.02 90.64 TRANSPLACENTAL | 67 0.67 91.31 UNKNOWN | 867 8.67 99.98 VAGINAL | 2 0.02 100.00 -----------------------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 18 Dec 2015