Frequencies for first 10,000 rows of drg2ing4 variable in nhamcsed2002 dataset :

 ingredient |
code #4 for |
    drug #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,972       99.72       99.72
      54713 |          6        0.06       99.78
      55180 |          1        0.01       99.79
      55405 |          1        0.01       99.80
      55755 |          5        0.05       99.85
      56193 |          1        0.01       99.86
      70120 |          1        0.01       99.87
      70260 |          1        0.01       99.88
      70336 |         10        0.10       99.98
      70338 |          1        0.01       99.99
      70344 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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