Frequencies for first 10,000 rows of drg2ing4 variable in nhamcsopd2000 dataset :

 ingredient |
code #4 for |
 medication |
         #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,977       99.77       99.77
      51340 |          1        0.01       99.78
      54350 |          1        0.01       99.79
      54468 |          1        0.01       99.80
      54502 |          1        0.01       99.81
      54713 |          5        0.05       99.86
      55105 |          2        0.02       99.88
      55150 |          1        0.01       99.89
      55440 |          2        0.02       99.91
      55645 |          1        0.01       99.92
      55755 |          5        0.05       99.97
      56193 |          2        0.02       99.99
      56265 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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