Frequencies for first 10,000 rows of drg2ing4 variable in nhamcsopd1997 dataset :

 ingredient |
code #4 for |
 medication |
         #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,941       99.41       99.41
      51340 |          1        0.01       99.42
      54455 |          1        0.01       99.43
      54468 |          2        0.02       99.45
      54595 |          1        0.01       99.46
      54713 |          1        0.01       99.47
      54895 |          1        0.01       99.48
      55710 |         10        0.10       99.58
      55745 |          1        0.01       99.59
      55755 |         38        0.38       99.97
      56194 |          1        0.01       99.98
      56265 |          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