Frequencies for first 10,000 rows of route variable in drug2013q2 dataset :

 The route of drug |
    administration |      Freq.     Percent        Cum.
-------------------+-----------------------------------
                   |      4,117       41.17       41.17
         CUTANEOUS |          3        0.03       41.20
      ENDOCERVICAL |          1        0.01       41.21
          EPIDURAL |          2        0.02       41.23
        INHALATION |         74        0.74       41.97
   INTRA-ARTICULAR |          3        0.03       42.00
       INTRACAVITY |          1        0.01       42.01
     INTRAMUSCULAR |        210        2.10       44.11
       INTRATHECAL |         11        0.11       44.22
      INTRAUTERINE |         10        0.10       44.32
       INTRAVENOUS |        829        8.29       52.61
 INTRAVENOUS BOLUS |          7        0.07       52.68
  INTRAVENOUS DRIP |        107        1.07       53.75
             NASAL |         16        0.16       53.91
        OPHTHALMIC |          8        0.08       53.99
              ORAL |      3,122       31.22       85.21
     OROPHARINGEAL |          1        0.01       85.22
             OTHER |         11        0.11       85.33
        PARENTERAL |          5        0.05       85.38
            RECTAL |          9        0.09       85.47
      SUBCUTANEOUS |        212        2.12       87.59
        SUBLINGUAL |         59        0.59       88.18
           TOPICAL |         26        0.26       88.44
       TRANSDERMAL |         72        0.72       89.16
      TRANSMAMMARY |          1        0.01       89.17
    TRANSPLACENTAL |        121        1.21       90.38
           UNKNOWN |        952        9.52       99.90
           VAGINAL |         10        0.10      100.00
-------------------+-----------------------------------
             Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 19 Apr 2017