Frequencies for first 10,000 rows of drg1ing4 variable in nhamcsopd1995 dataset :

 ingredient |
code #4 for |
 medication |
         #1 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,774       97.74       97.74
      51340 |          1        0.01       97.75
      54395 |          1        0.01       97.76
      54468 |          3        0.03       97.79
      54587 |          1        0.01       97.80
      54595 |          1        0.01       97.81
      54713 |          4        0.04       97.85
      54995 |          1        0.01       97.86
      55105 |         14        0.14       98.00
      55180 |          4        0.04       98.04
      55710 |         18        0.18       98.22
      55755 |        174        1.74       99.96
      55770 |          3        0.03       99.99
      56194 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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