Frequencies for first 10,000 rows of drug8cl3 variable in nhamcsopd2004 dataset :

        drug class #3 for medication #8 |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                         ace inhibitors |          2        0.02        0.02
                           antipyretics |         12        0.12        0.14
                    nasal decongestants |          1        0.01        0.15
                         antihistamines |          5        0.05        0.20
                          cold remedies |          1        0.01        0.21
                                      . |      9,979       99.79      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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