Frequencies for first 10,000 rows of drg2ing5 variable in nhamcsopd2001 dataset :

 ingredient |
code #5 for |
 medication |
         #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,968       99.68       99.68
      56185 |         29        0.29       99.97
      56195 |          2        0.02       99.99
      59728 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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