Frequencies for first 10,000 rows of drug5cl3 variable in nhamcsopd2003 dataset :

        drug class #3 for medication #5 |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                         ace inhibitors |          1        0.01        0.01
                        anticonvulsants |          2        0.02        0.03
                cycloplegics/mydriatics |          1        0.01        0.04
ocular anti-infective/anti-inflammatory |          1        0.01        0.05
                           antipyretics |         45        0.45        0.50
                         antihistamines |         14        0.14        0.64
                          cold remedies |          1        0.01        0.65
                                      . |      9,935       99.35      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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