Frequencies for first 10,000 rows of contsub13 variable in nhamcsed2015 dataset

      Controlled substance |
status code for medication |
                       #13 |      Freq.     Percent        Cum.
---------------------------+-----------------------------------
               Schedule II |          1        0.01        0.01
              Schedule III |          1        0.01        0.02
               Schedule IV |          4        0.04        0.06
                No control |        115        1.15        1.21
              Undetermined |          3        0.03        1.24
                         . |      9,876       98.76      100.00
---------------------------+-----------------------------------
                     Total |     10,000      100.00

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