Frequencies for first 10,000 rows of drg2ing5 variable in namcs1997 dataset :

 ingredient |
code #5 for |
 medication |
         #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,973       99.73       99.73
      53620 |          1        0.01       99.74
      54305 |          1        0.01       99.75
      54400 |          1        0.01       99.76
      54465 |          1        0.01       99.77
      55348 |          5        0.05       99.82
      56185 |         16        0.16       99.98
      56193 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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