Frequencies for first 10,000 rows of drg4ing5 variable in nhamcsopd1994 dataset :

 ingredient |
code #5 for |
 medication |
         #4 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,997       99.97       99.97
      56193 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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