Frequencies for first 10,000 rows of contsub8 variable in namcs2012 dataset :

Controlled status code for |
              medication 8 |      Freq.     Percent        Cum.
---------------------------+-----------------------------------
               Schedule II |         10        0.10        0.10
              Schedule III |         12        0.12        0.22
               Schedule IV |         27        0.27        0.49
                Schedule V |          4        0.04        0.53
                No control |        832        8.32        8.85
              Undetermined |         19        0.19        9.04
        Multiple schedules |          1        0.01        9.05
                         . |      9,095       90.95      100.00
---------------------------+-----------------------------------
                     Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016