Frequencies for first 10,000 rows of dinga11 variable in nhamcsed2001 dataset :

 ingredient |
code #1 for |
    adverse |
    drug #1 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,992       99.92       99.92
      50000 |          1        0.01       99.93
      50005 |          4        0.04       99.97
      50260 |          1        0.01       99.98
      52645 |          1        0.01       99.99
      55555 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016