Frequencies for first 10,000 rows of contsub5 variable in namcs2002 dataset :

Controlled status code for |
             medication #5 |      Freq.     Percent        Cum.
---------------------------+-----------------------------------
               Schedule II |          3        0.03        0.03
              Schedule III |         13        0.13        0.16
               Schedule IV |         17        0.17        0.33
                Schedule V |          2        0.02        0.35
                No control |        782        7.82        8.17
              Undetermined |         22        0.22        8.39
                         . |      9,161       91.61      100.00
---------------------------+-----------------------------------
                     Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016