Frequencies for first 10,000 rows of contsub20 variable in nhamcsed2015 dataset

      Controlled substance |
status code for medication |
                       #20 |      Freq.     Percent        Cum.
---------------------------+-----------------------------------
               Schedule II |          1        0.01        0.01
                No control |         28        0.28        0.29
                         . |      9,971       99.71      100.00
---------------------------+-----------------------------------
                     Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 20 Nov 2017