Frequencies for first 10,000 rows of contsub4 variable in namcs2011 dataset :

Medication #4 - Controlled |
               status code |      Freq.     Percent        Cum.
---------------------------+-----------------------------------
               Schedule II |         36        0.36        0.36
              Schedule III |         50        0.50        0.86
               Schedule IV |         99        0.99        1.85
                Schedule V |         12        0.12        1.97
                No control |      2,795       27.95       29.92
              Undetermined |         40        0.40       30.32
        Multiple schedules |          5        0.05       30.37
                         . |      6,963       69.63      100.00
---------------------------+-----------------------------------
                     Total |     10,000      100.00

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