Frequencies for first 10,000 rows of contsub17 variable in nhamcsed2014 dataset :

      Controlled substance |
status code for medication |
                       #17 |      Freq.     Percent        Cum.
---------------------------+-----------------------------------
               Schedule II |          1        0.01        0.01
               Schedule IV |          1        0.01        0.02
                No control |         33        0.33        0.35
              Undetermined |          1        0.01        0.36
                         . |      9,964       99.64      100.00
---------------------------+-----------------------------------
                     Total |     10,000      100.00

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