Frequencies for first 10,000 rows of role_cod variable in drug2015q1 dataset :

   Code for |
     drug's |
   reported |
    role in |
      event |      Freq.     Percent        Cum.
------------+-----------------------------------
          C |      6,512       65.12       65.12
          I |          7        0.07       65.19
         PS |      1,232       12.32       77.51
         SS |      2,249       22.49      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 19 Apr 2017