Frequencies for first 10,000 rows of drg6ing1 variable in nhamcsed1995 dataset :

 ingredient |
code #1 for |
    drug #6 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,989       99.89       99.89
      50005 |          6        0.06       99.95
      50420 |          1        0.01       99.96
      52615 |          1        0.01       99.97
      52645 |          1        0.01       99.98
      53780 |          1        0.01       99.99
      55555 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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