Frequencies for first 10,000 rows of route variable in drug2004q3 dataset : The route of drug | administration | Freq. Percent Cum. -----------------------------+----------------------------------- | 5,497 54.97 54.97 AURICULAR (OTIC) | 1 0.01 54.98 CUTANEOUS | 18 0.18 55.16 EPIDURAL | 1 0.01 55.17 INTRA CORPUS CAVERNOSUM | 1 0.01 55.18 INTRA-ARTICULAR | 1 0.01 55.19 INTRA-UTERINE | 32 0.32 55.51 INTRADERMAL | 4 0.04 55.55 INTRAMUSCULAR | 79 0.79 56.34 INTRATHECAL | 2 0.02 56.36 INTRATUMOR | 1 0.01 56.37 INTRAVENOUS | 465 4.65 61.02 INTRAVENOUS DRIP | 20 0.20 61.22 INTRAVESICAL | 2 0.02 61.24 NASAL | 9 0.09 61.33 OPHTHALMIC | 5 0.05 61.38 ORAL | 2,797 27.97 89.35 OTHER | 7 0.07 89.42 PARENTERAL | 9 0.09 89.51 RECTAL | 4 0.04 89.55 RESPIRATORY (INHALATION) | 42 0.42 89.97 SUBCUTANEOUS | 139 1.39 91.36 SUBLINGUAL | 3 0.03 91.39 TOPICAL | 21 0.21 91.60 TRANSDERMAL | 47 0.47 92.07 TRANSPLACENTAL | 8 0.08 92.15 UNKNOWN | 785 7.85 100.00 -----------------------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 18 Dec 2015