Frequencies for first 10,000 rows of drg3ing4 variable in namcs2003 dataset :

 ingredient |
code #4 for |
 medication |
         #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,981       99.81       99.81
      54165 |          1        0.01       99.82
      55490 |          1        0.01       99.83
      55755 |          7        0.07       99.90
      56193 |          1        0.01       99.91
      70180 |          1        0.01       99.92
      70231 |          1        0.01       99.93
      70260 |          5        0.05       99.98
      70344 |          1        0.01       99.99
      70691 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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