Frequencies for first 10,000 rows of drg1ing5 variable in nhamcsed2000 dataset :

 ingredient |
code #5 for |
    drug #1 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,970       99.70       99.70
      54180 |          1        0.01       99.71
      54995 |          1        0.01       99.72
      55348 |         18        0.18       99.90
      55520 |          1        0.01       99.91
      55815 |          1        0.01       99.92
      56185 |          7        0.07       99.99
      70162 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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