Frequencies for first 10,000 rows of drg3ing5 variable in nhamcsopd1996 dataset :

 ingredient |
code #5 for |
 medication |
         #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,982       99.82       99.82
      55755 |          2        0.02       99.84
      56185 |         14        0.14       99.98
      56193 |          1        0.01       99.99
      56195 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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