Frequencies for first 10,000 rows of role_cod variable in drug2014q1 dataset :

   Code for |
     drug's |
   reported |
    role in |
      event |      Freq.     Percent        Cum.
------------+-----------------------------------
          C |      5,561       55.61       55.61
          I |         52        0.52       56.13
         PS |      1,488       14.88       71.01
         SS |      2,899       28.99      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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