Frequencies for first 10,000 rows of drg6ing3 variable in nhamcsed1996 dataset :

 ingredient |
code #3 for |
    drug #6 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,993       99.93       99.93
      50638 |          1        0.01       99.94
      50745 |          3        0.03       99.97
      54395 |          1        0.01       99.98
      54595 |          1        0.01       99.99
      55240 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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