Frequencies for first 10,000 rows of contsub18 variable in nhamcsed2015 dataset

      Controlled substance |
status code for medication |
                       #18 |      Freq.     Percent        Cum.
---------------------------+-----------------------------------
              Schedule III |          2        0.02        0.02
                No control |         39        0.39        0.41
              Undetermined |          1        0.01        0.42
                         . |      9,958       99.58      100.00
---------------------------+-----------------------------------
                     Total |     10,000      100.00

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