Frequencies for first 10,000 rows of role_cod variable in drug2014q2 dataset :

   Code for |
     drug's |
   reported |
    role in |
      event |      Freq.     Percent        Cum.
------------+-----------------------------------
          C |      5,100       51.00       51.00
          I |         25        0.25       51.25
         PS |      1,518       15.18       66.43
         SS |      3,357       33.57      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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