Frequencies for first 10,000 rows of contsub8 variable in namcs2015 dataset :

 Controlled |
  substance |
   code for |
 medication |
         #8 |      Freq.     Percent        Cum.
------------+-----------------------------------
          2 |         20        0.20        0.20
          3 |         14        0.14        0.34
          4 |         31        0.31        0.65
          5 |          6        0.06        0.71
          6 |      1,239       12.39       13.10
          7 |         19        0.19       13.29
          8 |          2        0.02       13.31
          . |      8,669       86.69      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 25 Oct 2017