Frequencies for first 10,000 rows of contsub3 variable in namcs2014 dataset :

 Controlled substance code |
         for medication #3 |      Freq.     Percent        Cum.
---------------------------+-----------------------------------
               Schedule II |         78        0.78        0.78
              Schedule III |         71        0.71        1.49
               Schedule IV |        154        1.54        3.03
                Schedule V |         13        0.13        3.16
                No control |      3,976       39.76       42.92
              Undetermined |        116        1.16       44.08
        Multiple schedules |         14        0.14       44.22
                         . |      5,578       55.78      100.00
---------------------------+-----------------------------------
                     Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 27 Mar 2017