Frequencies for first 10,000 rows of drg5ing3 variable in nhamcsed1999 dataset :

 ingredient |
code #3 for |
    drug #5 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,991       99.91       99.91
      50845 |          1        0.01       99.92
      54395 |          4        0.04       99.96
      54465 |          1        0.01       99.97
      54595 |          1        0.01       99.98
      55240 |          1        0.01       99.99
      56345 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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