Frequencies for first 10,000 rows of drg2ing5 variable in nhamcsed1995 dataset :

 ingredient |
code #5 for |
    drug #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,988       99.88       99.88
      55150 |          1        0.01       99.89
      55348 |          6        0.06       99.95
      55520 |          1        0.01       99.96
      55755 |          1        0.01       99.97
      56185 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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