Frequencies for first 10,000 rows of ncmed15 variable in namcs2015 dataset :

         Is |
 Medication |
 #15 new or |
  continued |      Freq.     Percent        Cum.
------------+-----------------------------------
         -9 |          3        0.03        0.03
         -7 |      9,762       97.62       97.65
          1 |          7        0.07       97.72
          2 |        228        2.28      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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