Frequencies for first 10,000 rows of drg1ing5 variable in nhamcsed2001 dataset :

 ingredient |
code #5 for |
    drug #1 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,963       99.63       99.63
      55253 |          1        0.01       99.64
      55348 |         15        0.15       99.79
      56185 |         19        0.19       99.98
      56265 |          1        0.01       99.99
      70420 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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