Frequencies for first 10,000 rows of contsub9 variable in namcs2014 dataset :

 Controlled substance code |
         for medication #9 |      Freq.     Percent        Cum.
---------------------------+-----------------------------------
               Schedule II |         14        0.14        0.14
              Schedule III |         24        0.24        0.38
               Schedule IV |         33        0.33        0.71
                Schedule V |          6        0.06        0.77
                No control |      1,086       10.86       11.63
              Undetermined |         34        0.34       11.97
        Multiple schedules |          3        0.03       12.00
                         . |      8,800       88.00      100.00
---------------------------+-----------------------------------
                     Total |     10,000      100.00

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