Frequencies for first 10,000 rows of drg1ing5 variable in nhamcsed1998 dataset :

 ingredient |
code #5 for |
    drug #1 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,979       99.79       99.79
      54180 |          1        0.01       99.80
      55348 |         15        0.15       99.95
      55755 |          1        0.01       99.96
      56185 |          3        0.03       99.99
      56265 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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