Frequencies for first 10,000 rows of contsub10 variable in nhamcsed2015 dataset

      Controlled substance |
status code for medication |
                       #10 |      Freq.     Percent        Cum.
---------------------------+-----------------------------------
               Schedule II |         13        0.13        0.13
              Schedule III |          5        0.05        0.18
               Schedule IV |         10        0.10        0.28
                Schedule V |          1        0.01        0.29
                No control |        209        2.09        2.38
              Undetermined |          4        0.04        2.42
                         . |      9,758       97.58      100.00
---------------------------+-----------------------------------
                     Total |     10,000      100.00

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