Frequencies for first 10,000 rows of role_cod variable in drug2018q4 dataset :

   Code for |
     drug's |
   reported |
    role in |
      event |      Freq.     Percent        Cum.
------------+-----------------------------------
          C |      5,125       51.25       51.25
          I |        100        1.00       52.25
         PS |      1,547       15.47       67.72
         SS |      3,228       32.28      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 7 Mar 2019