Frequencies for first 10,000 rows of route variable in drug2009q2 dataset : The route of drug | administration | Freq. Percent Cum. -----------------------------+----------------------------------- | 4,640 46.40 46.40 18776 | 1 0.01 46.41 20075 | 1 0.01 46.42 20076 | 1 0.01 46.43 21977 | 1 0.01 46.44 50708 | 1 0.01 46.45 BUCCAL | 1 0.01 46.46 CUTANEOUS | 1 0.01 46.47 EPIDURAL | 6 0.06 46.53 INTRA-ARTERIAL | 2 0.02 46.55 INTRA-ARTICULAR | 1 0.01 46.56 INTRA-UTERINE | 48 0.48 47.04 INTRACAVERNOUS | 1 0.01 47.05 INTRACERVICAL | 8 0.08 47.13 INTRAMUSCULAR | 169 1.69 48.82 INTRAOCULAR | 9 0.09 48.91 INTRAPERITONEAL | 20 0.20 49.11 INTRATHECAL | 7 0.07 49.18 INTRAVENOUS | 649 6.49 55.67 INTRAVENOUS BOLUS | 7 0.07 55.74 INTRAVENOUS DRIP | 49 0.49 56.23 INTRAVESICAL | 4 0.04 56.27 NASAL | 14 0.14 56.41 OPHTHALMIC | 14 0.14 56.55 ORAL | 2,994 29.94 86.49 OTHER | 15 0.15 86.64 PARENTERAL | 12 0.12 86.76 RECTAL | 3 0.03 86.79 RESPIRATORY (INHALATION) | 124 1.24 88.03 SUBCUTANEOUS | 257 2.57 90.60 SUBDERMAL | 1 0.01 90.61 SUBLINGUAL | 10 0.10 90.71 TOPICAL | 31 0.31 91.02 TRANSDERMAL | 62 0.62 91.64 TRANSPLACENTAL | 29 0.29 91.93 UNKNOWN | 803 8.03 99.96 URETHRAL | 2 0.02 99.98 VAGINAL | 2 0.02 100.00 -----------------------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 18 Dec 2015