Frequencies for first 10,000 rows of contsub14 variable in namcs2014 dataset :

 Controlled substance code |
        for medication #14 |      Freq.     Percent        Cum.
---------------------------+-----------------------------------
              Schedule III |          3        0.03        0.03
               Schedule IV |         10        0.10        0.13
                Schedule V |          1        0.01        0.14
                No control |        321        3.21        3.35
              Undetermined |         12        0.12        3.47
        Multiple schedules |          1        0.01        3.48
                         . |      9,652       96.52      100.00
---------------------------+-----------------------------------
                     Total |     10,000      100.00

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