Frequencies for first 10,000 rows of contsub5 variable in nhamcsed2015 dataset 

      Controlled substance |
 status code medication #5 |      Freq.     Percent        Cum.
---------------------------+-----------------------------------
               Schedule II |        115        1.15        1.15
              Schedule III |         54        0.54        1.69
               Schedule IV |         36        0.36        2.05
                Schedule V |          5        0.05        2.10
                No control |      1,295       12.95       15.05
              Undetermined |         21        0.21       15.26
        Multiple schedules |         10        0.10       15.36
                         . |      8,464       84.64      100.00
---------------------------+-----------------------------------
                     Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 20 Nov 2017