Frequencies for first 10,000 rows of contsub8 variable in nhamcsed2014 dataset :

      Controlled substance |
status code for medication |
                        #8 |      Freq.     Percent        Cum.
---------------------------+-----------------------------------
               Schedule II |         23        0.23        0.23
              Schedule III |          8        0.08        0.31
               Schedule IV |         13        0.13        0.44
                Schedule V |          2        0.02        0.46
                No control |        320        3.20        3.66
              Undetermined |          2        0.02        3.68
        Multiple schedules |          2        0.02        3.70
                         . |      9,630       96.30      100.00
---------------------------+-----------------------------------
                     Total |     10,000      100.00

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