Frequencies for first 10,000 rows of drg5ing4 variable in nhamcsed2000 dataset :

 ingredient |
code #4 for |
    drug #5 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,997       99.97       99.97
      55180 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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