Frequencies for first 10,000 rows of drg2ing5 variable in nhamcsopd1995 dataset :

 ingredient |
code #5 for |
 medication |
         #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,974       99.74       99.74
      55348 |          2        0.02       99.76
      55755 |          7        0.07       99.83
      56185 |         16        0.16       99.99
      56195 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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