Frequencies for first 10,000 rows of ncmed18 variable in namcs2015 dataset :

         Is |
 Medication |
 #18 new or |
  continued |      Freq.     Percent        Cum.
------------+-----------------------------------
         -9 |          1        0.01        0.01
         -7 |      9,905       99.05       99.06
          1 |          7        0.07       99.13
          2 |         87        0.87      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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