Frequencies for first 10,000 rows of route variable in drug2014q2 dataset :

 The route of drug |
    administration |      Freq.     Percent        Cum.
-------------------+-----------------------------------
                   |      3,749       37.49       37.49
         CUTANEOUS |          3        0.03       37.52
        INHALATION |         85        0.85       38.37
      INTRAHEPATIC |          2        0.02       38.39
     INTRAMUSCULAR |        239        2.39       40.78
       INTRAOCULAR |          6        0.06       40.84
   INTRAPERITONEAL |          1        0.01       40.85
        INTRASINAL |          2        0.02       40.87
       INTRATHECAL |          2        0.02       40.89
      INTRAUTERINE |          9        0.09       40.98
       INTRAVENOUS |      1,059       10.59       51.57
 INTRAVENOUS BOLUS |          7        0.07       51.64
  INTRAVENOUS DRIP |         69        0.69       52.33
             NASAL |         19        0.19       52.52
        OPHTHALMIC |          8        0.08       52.60
              ORAL |      3,548       35.48       88.08
             OTHER |          4        0.04       88.12
        PARENTERAL |          4        0.04       88.16
            RECTAL |         14        0.14       88.30
      SUBCUTANEOUS |        131        1.31       89.61
        SUBLINGUAL |          5        0.05       89.66
           TOPICAL |         22        0.22       89.88
       TRANSDERMAL |         45        0.45       90.33
      TRANSMAMMARY |          6        0.06       90.39
    TRANSPLACENTAL |         99        0.99       91.38
           UNKNOWN |        859        8.59       99.97
           VAGINAL |          3        0.03      100.00
-------------------+-----------------------------------
             Total |     10,000      100.00

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