Frequencies for first 10,000 rows of contsub5 variable in namcs2012 dataset :

Controlled status code for |
              medication 5 |      Freq.     Percent        Cum.
---------------------------+-----------------------------------
               Schedule II |         31        0.31        0.31
              Schedule III |         26        0.26        0.57
               Schedule IV |         70        0.70        1.27
                Schedule V |          7        0.07        1.34
                No control |      1,686       16.86       18.20
              Undetermined |         58        0.58       18.78
        Multiple schedules |          2        0.02       18.80
                         . |      8,120       81.20      100.00
---------------------------+-----------------------------------
                     Total |     10,000      100.00

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