Frequencies for first 10,000 rows of drg1ing5 variable in nhamcsopd1997 dataset :

 ingredient |
code #5 for |
 medication |
         #1 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,671       96.71       96.71
      55348 |         10        0.10       96.81
      55520 |          1        0.01       96.82
      56185 |        313        3.13       99.95
      56193 |          3        0.03       99.98
      56585 |          1        0.01       99.99
      57170 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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