Frequencies for first 10,000 rows of contsub5 variable in nhamcsed2014 dataset :

      Controlled substance |
 status code medication #5 |      Freq.     Percent        Cum.
---------------------------+-----------------------------------
               Schedule II |         94        0.94        0.94
              Schedule III |         51        0.51        1.45
               Schedule IV |         40        0.40        1.85
                Schedule V |          2        0.02        1.87
                No control |      1,099       10.99       12.86
              Undetermined |         13        0.13       12.99
        Multiple schedules |         14        0.14       13.13
                         . |      8,687       86.87      100.00
---------------------------+-----------------------------------
                     Total |     10,000      100.00

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