Frequencies for first 10,000 rows of contsub3 variable in nhamcsed2014 dataset :

      Controlled substance |
status code for medication |
                        #3 |      Freq.     Percent        Cum.
---------------------------+-----------------------------------
               Schedule II |        270        2.70        2.70
              Schedule III |        107        1.07        3.77
               Schedule IV |        105        1.05        4.82
                Schedule V |          2        0.02        4.84
                No control |      2,908       29.08       33.92
              Undetermined |         33        0.33       34.25
        Multiple schedules |         27        0.27       34.52
                         . |      6,548       65.48      100.00
---------------------------+-----------------------------------
                     Total |     10,000      100.00

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