Frequencies for first 10,000 rows of contsub16 variable in namcs2014 dataset :

 Controlled substance code |
        for medication #16 |      Freq.     Percent        Cum.
---------------------------+-----------------------------------
               Schedule II |          1        0.01        0.01
              Schedule III |          2        0.02        0.03
               Schedule IV |         10        0.10        0.13
                No control |        185        1.85        1.98
              Undetermined |          3        0.03        2.01
                         . |      9,799       97.99      100.00
---------------------------+-----------------------------------
                     Total |     10,000      100.00

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