Frequencies for first 10,000 rows of route variable in drug2005q2 dataset :

           The route of drug |
              administration |      Freq.     Percent        Cum.
-----------------------------+-----------------------------------
                             |      6,915       69.15       69.15
               INTRA-UTERINE |         83        0.83       69.98
               INTRAMUSCULAR |        133        1.33       71.31
             INTRAPERITONEAL |         15        0.15       71.46
                 INTRAVENOUS |        156        1.56       73.02
           INTRAVENOUS BOLUS |         31        0.31       73.33
            INTRAVENOUS DRIP |          4        0.04       73.37
                       NASAL |          1        0.01       73.38
                        ORAL |      2,034       20.34       93.72
                       OTHER |          4        0.04       93.76
                  PARENTERAL |          1        0.01       93.77
                      RECTAL |          1        0.01       93.78
    RESPIRATORY (INHALATION) |        310        3.10       96.88
                SUBCUTANEOUS |        289        2.89       99.77
                     TOPICAL |          3        0.03       99.80
                 TRANSDERMAL |          4        0.04       99.84
              TRANSPLACENTAL |          2        0.02       99.86
                     UNKNOWN |          8        0.08       99.94
                     VAGINAL |          6        0.06      100.00
-----------------------------+-----------------------------------
                       Total |     10,000      100.00

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