Frequencies for first 10,000 rows of contsub2 variable in namcs2011 dataset :

Medication #2 - Controlled |
               status code |      Freq.     Percent        Cum.
---------------------------+-----------------------------------
               Schedule II |        117        1.17        1.17
              Schedule III |        118        1.18        2.35
               Schedule IV |        197        1.97        4.32
                Schedule V |         30        0.30        4.62
                No control |      5,012       50.12       54.74
              Undetermined |         96        0.96       55.70
        Multiple schedules |         20        0.20       55.90
                         . |      4,410       44.10      100.00
---------------------------+-----------------------------------
                     Total |     10,000      100.00

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