Frequencies for first 10,000 rows of contsub26 variable in nhamcsed2014 dataset :

      Controlled substance |
status code for medication |
                       #26 |      Freq.     Percent        Cum.
---------------------------+-----------------------------------
               Schedule II |          1        0.01        0.01
                No control |          7        0.07        0.08
                         . |      9,992       99.92      100.00
---------------------------+-----------------------------------
                     Total |     10,000      100.00

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