Frequencies for first 10,000 rows of contsub1 variable in nhamcsed2014 dataset :

      Controlled substance |
status code for medication |
                        #1 |      Freq.     Percent        Cum.
---------------------------+-----------------------------------
               Schedule II |        594        5.94        5.94
              Schedule III |        326        3.26        9.20
               Schedule IV |        202        2.02       11.22
                Schedule V |          7        0.07       11.29
                No control |      6,603       66.03       77.32
              Undetermined |         95        0.95       78.27
        Multiple schedules |         64        0.64       78.91
                         . |      2,109       21.09      100.00
---------------------------+-----------------------------------
                     Total |     10,000      100.00

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