Frequencies for first 10,000 rows of drg5ing5 variable in namcs2005 dataset :

 ingredient |
code #5 for |
 medication |
         #5 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,988       99.88       99.88
      55348 |          1        0.01       99.89
      56185 |          9        0.09       99.98
      56193 |          1        0.01       99.99
      70275 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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