Frequencies for first 10,000 rows of contsub17 variable in namcs2014 dataset :

 Controlled substance code |
        for medication #17 |      Freq.     Percent        Cum.
---------------------------+-----------------------------------
               Schedule II |          1        0.01        0.01
              Schedule III |          2        0.02        0.03
               Schedule IV |          7        0.07        0.10
                Schedule V |          1        0.01        0.11
                No control |        144        1.44        1.55
              Undetermined |          2        0.02        1.57
                         . |      9,843       98.43      100.00
---------------------------+-----------------------------------
                     Total |     10,000      100.00

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