Frequencies for first 10,000 rows of contsub19 variable in namcs2014 dataset :

 Controlled substance code |
        for medication #19 |      Freq.     Percent        Cum.
---------------------------+-----------------------------------
               Schedule II |          1        0.01        0.01
              Schedule III |          3        0.03        0.04
               Schedule IV |          4        0.04        0.08
                Schedule V |          2        0.02        0.10
                No control |         89        0.89        0.99
              Undetermined |          2        0.02        1.01
                         . |      9,899       98.99      100.00
---------------------------+-----------------------------------
                     Total |     10,000      100.00

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