Frequencies for first 10,000 rows of drg1ing4 variable in nhamcsopd1997 dataset :

 ingredient |
code #4 for |
 medication |
         #1 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,625       96.25       96.25
      51340 |          1        0.01       96.26
      54455 |          1        0.01       96.27
      54468 |          2        0.02       96.29
      54713 |         10        0.10       96.39
      55180 |          1        0.01       96.40
      55315 |          1        0.01       96.41
      55440 |          1        0.01       96.42
      55710 |         41        0.41       96.83
      55755 |        313        3.13       99.96
      55770 |          2        0.02       99.98
      56185 |          1        0.01       99.99
      57168 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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