Frequencies for first 10,000 rows of role_cod variable in drug2011q2 dataset :

   Code for |
     drug's |
   reported |
    role in |
      event |      Freq.     Percent        Cum.
------------+-----------------------------------
            |          3        0.03        0.03
     022387 |          1        0.01        0.04
          C |      5,641       56.41       56.45
          D |          8        0.08       56.53
          I |         67        0.67       57.20
         PS |      2,295       22.95       80.15
         SS |      1,984       19.84       99.99
          Y |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Dec 2015