Frequencies for first 10,000 rows of contsub16 variable in nhamcsed2014 dataset :

      Controlled substance |
status code for medication |
                       #16 |      Freq.     Percent        Cum.
---------------------------+-----------------------------------
               Schedule II |          3        0.03        0.03
              Schedule III |          1        0.01        0.04
               Schedule IV |          1        0.01        0.05
                No control |         44        0.44        0.49
              Undetermined |          1        0.01        0.50
                         . |      9,950       99.50      100.00
---------------------------+-----------------------------------
                     Total |     10,000      100.00

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