Frequencies for first 10,000 rows of adrg2in1 variable in nhamcsed2002 dataset :

 ingredient |
code #1 for |
    adverse |
    drug #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,996       99.96       99.96
      50005 |          3        0.03       99.99
      56261 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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