Frequencies for first 10,000 rows of drg4ing3 variable in nhamcsopd1999 dataset :

 ingredient |
code #3 for |
 medication |
         #4 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,978       99.78       99.78
      52655 |          1        0.01       99.79
      52908 |          1        0.01       99.80
      54328 |          2        0.02       99.82
      54395 |          1        0.01       99.83
      54455 |          1        0.01       99.84
      54465 |          2        0.02       99.86
      54995 |          2        0.02       99.88
      55105 |          2        0.02       99.90
      55130 |          6        0.06       99.96
      55715 |          1        0.01       99.97
      55745 |          1        0.01       99.98
      57034 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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