Frequencies for first 10,000 rows of route variable in drug2004q1 dataset :

           The route of drug |
              administration |      Freq.     Percent        Cum.
-----------------------------+-----------------------------------
                             |      6,190       61.90       61.90
                      BUCCAL |          4        0.04       61.94
                      DENTAL |          2        0.02       61.96
              INTRA-ARTERIAL |          6        0.06       62.02
             INTRA-ARTICULAR |          1        0.01       62.03
               INTRA-UTERINE |          4        0.04       62.07
               INTRACORONARY |          1        0.01       62.08
                INTRAHEPATIC |          1        0.01       62.09
               INTRALESIONAL |          1        0.01       62.10
               INTRAMUSCULAR |        165        1.65       63.75
             INTRAPERITONEAL |          5        0.05       63.80
                INTRAPLEURAL |          1        0.01       63.81
                 INTRATHECAL |          2        0.02       63.83
               INTRATRACHEAL |          1        0.01       63.84
                 INTRAVENOUS |        616        6.16       70.00
           INTRAVENOUS BOLUS |         27        0.27       70.27
            INTRAVENOUS DRIP |         52        0.52       70.79
                       NASAL |          6        0.06       70.85
                  OPHTHALMIC |         14        0.14       70.99
                        ORAL |      2,429       24.29       95.28
                       OTHER |         16        0.16       95.44
                  PARENTERAL |         11        0.11       95.55
                      RECTAL |         14        0.14       95.69
    RESPIRATORY (INHALATION) |         33        0.33       96.02
             SUBCONJUNCTIVAL |          1        0.01       96.03
                SUBCUTANEOUS |        127        1.27       97.30
                  SUBLINGUAL |          2        0.02       97.32
                     TOPICAL |         12        0.12       97.44
                 TRANSDERMAL |         17        0.17       97.61
                TRANSMAMMARY |          1        0.01       97.62
              TRANSPLACENTAL |         11        0.11       97.73
                     UNKNOWN |        224        2.24       99.97
                     VAGINAL |          3        0.03      100.00
-----------------------------+-----------------------------------
                       Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Dec 2015