Frequencies for first 10,000 rows of drg8ing5 variable in nhamcsopd2005 dataset :

ingredient code #5 for medication #8 |      Freq.     Percent        Cum.
-------------------------------------+-----------------------------------
                      salicylic acid |          1        0.01        0.01
                   proanthocyanidins |          1        0.01        0.02
                                   . |      9,998       99.98      100.00
-------------------------------------+-----------------------------------
                               Total |     10,000      100.00

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