Frequencies for first 10,000 rows of route variable in drug2014q1 dataset :

 The route of drug |
    administration |      Freq.     Percent        Cum.
-------------------+-----------------------------------
                   |      3,791       37.91       37.91
         CUTANEOUS |          1        0.01       37.92
          EPIDURAL |          8        0.08       38.00
        INHALATION |         97        0.97       38.97
     INTRAMUSCULAR |        268        2.68       41.65
       INTRAOCULAR |          4        0.04       41.69
       INTRATHECAL |          6        0.06       41.75
      INTRAUTERINE |         11        0.11       41.86
       INTRAVENOUS |        952        9.52       51.38
 INTRAVENOUS BOLUS |          3        0.03       51.41
  INTRAVENOUS DRIP |         89        0.89       52.30
             NASAL |         24        0.24       52.54
        OPHTHALMIC |         11        0.11       52.65
              ORAL |      3,159       31.59       84.24
     OROPHARINGEAL |          1        0.01       84.25
             OTHER |          2        0.02       84.27
            RECTAL |         11        0.11       84.38
      SUBCUTANEOUS |        136        1.36       85.74
        SUBLINGUAL |         20        0.20       85.94
           TOPICAL |         32        0.32       86.26
       TRANSDERMAL |        401        4.01       90.27
      TRANSMAMMARY |          2        0.02       90.29
    TRANSPLACENTAL |        151        1.51       91.80
           UNKNOWN |        816        8.16       99.96
           VAGINAL |          4        0.04      100.00
-------------------+-----------------------------------
             Total |     10,000      100.00

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