Frequencies for first 10,000 rows of drg6ing5 variable in nhamcsopd2005 dataset :

ingredient code #5 for medication #6 |      Freq.     Percent        Cum.
-------------------------------------+-----------------------------------
                           vitamin a |          2        0.02        0.02
                           vitamin e |          1        0.01        0.03
                                zinc |          1        0.01        0.04
                       cod liver oil |          1        0.01        0.05
                                   . |      9,995       99.95      100.00
-------------------------------------+-----------------------------------
                               Total |     10,000      100.00

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