Frequencies for first 10,000 rows of drg1ing5 variable in nhamcsopd1992 dataset :

 Ingredient |
code #5 for |
 medication |
         #1 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,996       99.96       99.96
      55348 |          1        0.01       99.97
      55815 |          1        0.01       99.98
      56265 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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