Frequencies for first 10,000 rows of drg7ing3 variable in namcs2004 dataset :

 ingredient |
code #3 for |
 medication |
         #7 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,994       99.94       99.94
      54160 |          1        0.01       99.95
      55105 |          2        0.02       99.97
      56193 |          1        0.01       99.98
      56340 |          1        0.01       99.99
      56345 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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