Frequencies for first 10,000 rows of contsub5 variable in namcs2015 dataset :

 Controlled |
  substance |
   code for |
 medication |
         #5 |      Freq.     Percent        Cum.
------------+-----------------------------------
          2 |         19        0.19        0.19
          3 |         43        0.43        0.62
          4 |         66        0.66        1.28
          5 |          6        0.06        1.34
          6 |      2,389       23.89       25.23
          7 |         43        0.43       25.66
          8 |          6        0.06       25.72
          . |      7,428       74.28      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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