Frequencies for first 10,000 rows of drg6ing4 variable in nhamcsed1997 dataset :

 ingredient |
code #4 for |
    drug #6 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |     10,000      100.00      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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