Frequencies for first 10,000 rows of drg5ing3 variable in nhamcsed1998 dataset :

 ingredient |
code #3 for |
    drug #5 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,990       99.90       99.90
      54395 |          2        0.02       99.92
      54400 |          1        0.01       99.93
      54465 |          1        0.01       99.94
      54595 |          2        0.02       99.96
      55240 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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