Frequencies for first 10,000 rows of drug3cl3 variable in nhamcsopd2003 dataset :

        drug class #3 for medication #3 |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                         ace inhibitors |          4        0.04        0.04
repl/regs of electrolytes/water balance |          1        0.01        0.05
                       topical steroids |          1        0.01        0.06
                        anticonvulsants |          3        0.03        0.09
         antineoplastics, miscellaneous |          1        0.01        0.10
                cycloplegics/mydriatics |          2        0.02        0.12
ocular anti-infective/anti-inflammatory |          2        0.02        0.14
                   otic, topical (misc) |          3        0.03        0.17
                           antipyretics |         44        0.44        0.61
         antiasthmatics/bronchodilators |          4        0.04        0.65
                    nasal decongestants |          1        0.01        0.66
   antitussives/expectorants/mucolytics |          1        0.01        0.67
                         antihistamines |         13        0.13        0.80
                          cold remedies |          7        0.07        0.87
                    pharmaceutical aids |          1        0.01        0.88
                                      . |      9,912       99.12      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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