Frequencies for first 10,000 rows of route variable in drug2017q1 dataset :

     The route of drug administration |      Freq.     Percent        Cum.
--------------------------------------+-----------------------------------
                                      |      2,232       22.32       22.32
                         Endocervical |          1        0.01       22.33
                         Endotracheal |          1        0.01       22.34
                             Epidural |          7        0.07       22.41
                          INTRA-AURAL |          2        0.02       22.43
                           INTRASINAL |          1        0.01       22.44
                       Intra-arterial |          8        0.08       22.52
                        Intra-uterine |          7        0.07       22.59
                         Intracardiac |          1        0.01       22.60
          Intramedullar (bone marrow) |          2        0.02       22.62
                        Intramuscular |         89        0.89       23.51
                          Intraocular |         18        0.18       23.69
                      Intraperitoneal |          1        0.01       23.70
                          Intrathecal |          4        0.04       23.74
Intravenous (not otherwise specified) |        875        8.75       32.49
                    Intravenous bolus |         19        0.19       32.68
                     Intravenous drip |        319        3.19       35.87
                                Nasal |         26        0.26       36.13
                           Ophthalmic |         19        0.19       36.32
                                 Oral |      3,523       35.23       71.55
                                Other |         47        0.47       72.02
                           Parenteral |          1        0.01       72.03
                               Rectal |          4        0.04       72.07
             Respiratory (inhalation) |        168        1.68       73.75
                         Subcutaneous |        320        3.20       76.95
                            Subdermal |          1        0.01       76.96
                           Sublingual |         10        0.10       77.06
                              Topical |         41        0.41       77.47
                          Transdermal |         43        0.43       77.90
                       Transplacental |         30        0.30       78.20
                              Unknown |      2,176       21.76       99.96
                              Vaginal |          4        0.04      100.00
--------------------------------------+-----------------------------------
                                Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Sep 2017