Frequencies for first 10,000 rows of contsub6 variable in namcs2012 dataset :

Controlled status code for |
              medication 6 |      Freq.     Percent        Cum.
---------------------------+-----------------------------------
               Schedule II |         23        0.23        0.23
              Schedule III |         26        0.26        0.49
               Schedule IV |         49        0.49        0.98
                Schedule V |          7        0.07        1.05
                No control |      1,304       13.04       14.09
              Undetermined |         34        0.34       14.43
        Multiple schedules |          4        0.04       14.47
                         . |      8,553       85.53      100.00
---------------------------+-----------------------------------
                     Total |     10,000      100.00

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