Frequencies for first 10,000 rows of contsub8 variable in nhamcsed2015 dataset 

      Controlled substance |
status code for medication |
                        #8 |      Freq.     Percent        Cum.
---------------------------+-----------------------------------
               Schedule II |         21        0.21        0.21
              Schedule III |          9        0.09        0.30
               Schedule IV |         18        0.18        0.48
                Schedule V |          2        0.02        0.50
                No control |        395        3.95        4.45
              Undetermined |          3        0.03        4.48
        Multiple schedules |          1        0.01        4.49
                         . |      9,551       95.51      100.00
---------------------------+-----------------------------------
                     Total |     10,000      100.00

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