Frequencies for first 10,000 rows of role_cod variable in drug2015q2 dataset :

   Code for |
     drug's |
   reported |
    role in |
      event |      Freq.     Percent        Cum.
------------+-----------------------------------
          C |      5,451       54.51       54.51
          I |         60        0.60       55.11
         PS |      1,560       15.60       70.71
         SS |      2,929       29.29      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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