Frequencies for first 10,000 rows of route variable in drug2018q2 dataset :

     The route of drug administration |      Freq.     Percent        Cum.
--------------------------------------+-----------------------------------
                                      |      2,258       22.58       22.58
                            Cutaneous |          1        0.01       22.59
                         Endocervical |          1        0.01       22.60
                             Epidural |          3        0.03       22.63
                          INTRACAVITY |          1        0.01       22.64
                       Intra-arterial |          2        0.02       22.66
                        Intra-uterine |         13        0.13       22.79
                        Intramuscular |         58        0.58       23.37
                          Intraocular |         24        0.24       23.61
                      Intraperitoneal |          7        0.07       23.68
                          Intrathecal |          8        0.08       23.76
Intravenous (not otherwise specified) |        672        6.72       30.48
                    Intravenous bolus |         11        0.11       30.59
                     Intravenous drip |        143        1.43       32.02
                                Nasal |         13        0.13       32.15
                           Ophthalmic |         15        0.15       32.30
                                 Oral |      3,155       31.55       63.85
                                Other |         41        0.41       64.26
                           Parenteral |         37        0.37       64.63
                               Rectal |          7        0.07       64.70
             Respiratory (inhalation) |        127        1.27       65.97
                         Subcutaneous |        561        5.61       71.58
                           Sublingual |          5        0.05       71.63
                              Topical |         37        0.37       72.00
                          Transdermal |         49        0.49       72.49
                         Transmammary |          2        0.02       72.51
                       Transplacental |        103        1.03       73.54
                              Unknown |      2,644       26.44       99.98
                             Urethral |          1        0.01       99.99
                              Vaginal |          1        0.01      100.00
--------------------------------------+-----------------------------------
                                Total |     10,000      100.00

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