Frequencies for first 10,000 rows of drg4ing3 variable in namcs1994 dataset :

 ingredient |
code #3 for |
 medication |
         #4 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,973       99.73       99.73
      50745 |          5        0.05       99.78
      52908 |          4        0.04       99.82
      53175 |          2        0.02       99.84
      54325 |          1        0.01       99.85
      54465 |          5        0.05       99.90
      54860 |          2        0.02       99.92
      55130 |          2        0.02       99.94
      55240 |          3        0.03       99.97
      55770 |          2        0.02       99.99
      56300 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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