Frequencies for first 10,000 rows of drg2ing4 variable in nhamcsed1992 dataset :

 Ingredient |
code #4 for |
    drug #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,966       99.66       99.66
      54238 |          2        0.02       99.68
      54465 |          1        0.01       99.69
      54468 |          5        0.05       99.74
      54713 |          8        0.08       99.82
      55180 |         17        0.17       99.99
      56265 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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