Frequencies for first 10,000 rows of drg8ing4 variable in namcs2005 dataset :

 ingredient |
code #4 for |
 medication |
         #8 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,993       99.93       99.93
      55755 |          5        0.05       99.98
      70154 |          1        0.01       99.99
      70260 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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