Frequencies for first 10,000 rows of drg8ing3 variable in nhamcsopd2005 dataset :

ingredient code #3 for medication #8 |      Freq.     Percent        Cum.
-------------------------------------+-----------------------------------
                       chlorobutanol |          1        0.01        0.01
                           vitamin c |          1        0.01        0.02
        dextroamphetamine saccharate |          1        0.01        0.03
                 manganese ascorbate |          1        0.01        0.04
                   phenylephrine hcl |          1        0.01        0.05
                  pyrilamine tannate |          1        0.01        0.06
                                   . |      9,994       99.94      100.00
-------------------------------------+-----------------------------------
                               Total |     10,000      100.00

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