Frequencies for first 10,000 rows of route variable in ful20166 dataset :

                                  Route |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
NASAL                                .. |         15        0.15        0.15
OPHTHALMIC                           .. |         57        0.57        0.72
ORAL                                 .. |      9,645       96.45       97.17
ORAL, RECTAL                         .. |          6        0.06       97.23
ORAL-28                              .. |         41        0.41       97.64
OTIC                                 .. |          6        0.06       97.70
RECTAL                               .. |         19        0.19       97.89
SUBLINGUAL                           .. |         14        0.14       98.03
TOPICAL                              .. |        105        1.05       99.08
TRANSDERM                            .. |         12        0.12       99.20
TRANSDERMAL                          .. |         55        0.55       99.75
TRANSMUCOSAL                         .. |         18        0.18       99.93
VAGINAL                              .. |          7        0.07      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 8 Feb 2018