Frequencies for first 10,000 rows of drg2ing5 variable in namcs1993 dataset :

 ingredient |
code #5 for |
 medication |
         #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,993       99.93       99.93
      54995 |          1        0.01       99.94
      55520 |          1        0.01       99.95
      55755 |          3        0.03       99.98
      56192 |          1        0.01       99.99
      56194 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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