Frequencies for first 10,000 rows of contsub2 variable in nhamcsed2014 dataset :

      Controlled substance |
status code for medication |
                        #2 |      Freq.     Percent        Cum.
---------------------------+-----------------------------------
               Schedule II |        413        4.13        4.13
              Schedule III |        204        2.04        6.17
               Schedule IV |        137        1.37        7.54
                Schedule V |         12        0.12        7.66
                No control |      4,576       45.76       53.42
              Undetermined |         53        0.53       53.95
        Multiple schedules |         38        0.38       54.33
                         . |      4,567       45.67      100.00
---------------------------+-----------------------------------
                     Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 11 Apr 2017