Frequencies for first 10,000 rows of contsub14 variable in nhamcsed2014 dataset :

      Controlled substance |
status code for medication |
                       #14 |      Freq.     Percent        Cum.
---------------------------+-----------------------------------
              Schedule III |          1        0.01        0.01
               Schedule IV |          3        0.03        0.04
                Schedule V |          2        0.02        0.06
                No control |         61        0.61        0.67
                         . |      9,933       99.33      100.00
---------------------------+-----------------------------------
                     Total |     10,000      100.00

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