Frequencies for first 10,000 rows of contsub5 variable in namcs2014 dataset :

 Controlled substance code |
         for medication #5 |      Freq.     Percent        Cum.
---------------------------+-----------------------------------
               Schedule II |         40        0.40        0.40
              Schedule III |         32        0.32        0.72
               Schedule IV |         90        0.90        1.62
                Schedule V |          4        0.04        1.66
                No control |      2,567       25.67       27.33
              Undetermined |         53        0.53       27.86
        Multiple schedules |          6        0.06       27.92
                         . |      7,208       72.08      100.00
---------------------------+-----------------------------------
                     Total |     10,000      100.00

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