Frequencies for first 10,000 rows of drg4ing3 variable in nhamcsed2002 dataset :

 ingredient |
code #3 for |
    drug #4 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,986       99.86       99.86
      50745 |          1        0.01       99.87
      51395 |          1        0.01       99.88
      53175 |          2        0.02       99.90
      54330 |          1        0.01       99.91
      55105 |          1        0.01       99.92
      55480 |          1        0.01       99.93
      70120 |          4        0.04       99.97
      70362 |          2        0.02       99.99
      70582 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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