Frequencies for first 10,000 rows of contsub6 variable in nhamcsed2014 dataset :

      Controlled substance |
status code for medication |
                        #6 |      Freq.     Percent        Cum.
---------------------------+-----------------------------------
               Schedule II |         48        0.48        0.48
              Schedule III |         33        0.33        0.81
               Schedule IV |         22        0.22        1.03
                Schedule V |          1        0.01        1.04
                No control |        687        6.87        7.91
              Undetermined |          8        0.08        7.99
        Multiple schedules |          7        0.07        8.06
                         . |      9,194       91.94      100.00
---------------------------+-----------------------------------
                     Total |     10,000      100.00

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