Frequencies for first 10,000 rows of contsub13 variable in namcs2014 dataset :

 Controlled substance code |
        for medication #13 |      Freq.     Percent        Cum.
---------------------------+-----------------------------------
               Schedule II |          6        0.06        0.06
              Schedule III |          5        0.05        0.11
               Schedule IV |         11        0.11        0.22
                Schedule V |          3        0.03        0.25
                No control |        421        4.21        4.46
              Undetermined |         14        0.14        4.60
        Multiple schedules |          1        0.01        4.61
                         . |      9,539       95.39      100.00
---------------------------+-----------------------------------
                     Total |     10,000      100.00

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