Frequencies for first 10,000 rows of drg1ing5 variable in nhamcsed1996 dataset :

 ingredient |
code #5 for |
    drug #1 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,959       99.59       99.59
      54465 |          1        0.01       99.60
      55348 |         25        0.25       99.85
      55755 |          3        0.03       99.88
      55770 |          1        0.01       99.89
      55893 |          1        0.01       99.90
      56185 |         10        0.10      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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