Frequencies for first 10,000 rows of contsub21 variable in nhamcsed2015 dataset

      Controlled substance |
status code for medication |
                       #21 |      Freq.     Percent        Cum.
---------------------------+-----------------------------------
               Schedule II |          2        0.02        0.02
                No control |         23        0.23        0.25
                         . |      9,975       99.75      100.00
---------------------------+-----------------------------------
                     Total |     10,000      100.00

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