Frequencies for first 10,000 rows of contsub6 variable in namcs2014 dataset :

 Controlled substance code |
         for medication #6 |      Freq.     Percent        Cum.
---------------------------+-----------------------------------
               Schedule II |         26        0.26        0.26
              Schedule III |         32        0.32        0.58
               Schedule IV |         68        0.68        1.26
                Schedule V |          9        0.09        1.35
                No control |      2,047       20.47       21.82
              Undetermined |         58        0.58       22.40
        Multiple schedules |          6        0.06       22.46
                         . |      7,754       77.54      100.00
---------------------------+-----------------------------------
                     Total |     10,000      100.00

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