Frequencies for first 10,000 rows of drg3ing4 variable in namcs1996 dataset :

 ingredient |
code #4 for |
 medication |
         #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,970       99.70       99.70
      51340 |          2        0.02       99.72
      52465 |          1        0.01       99.73
      54468 |          1        0.01       99.74
      54595 |          1        0.01       99.75
      54713 |          3        0.03       99.78
      55180 |          6        0.06       99.84
      55710 |          1        0.01       99.85
      55755 |         11        0.11       99.96
      56185 |          1        0.01       99.97
      56192 |          2        0.02       99.99
      56265 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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