Frequencies for first 10,000 rows of role_cod variable in drug2015q3 dataset :

   Code for |
     drug's |
   reported |
    role in |
      event |      Freq.     Percent        Cum.
------------+-----------------------------------
          C |      5,743       57.43       57.43
          I |         31        0.31       57.74
         PS |      1,387       13.87       71.61
         SS |      2,839       28.39      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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