Frequencies for first 10,000 rows of drug6cl3 variable in nhamcsopd2003 dataset :

        drug class #3 for medication #6 |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                topical anti-infectives |          1        0.01        0.01
                        anticonvulsants |          6        0.06        0.07
ocular anti-infective/anti-inflammatory |          1        0.01        0.08
                           antipyretics |         22        0.22        0.30
         antiasthmatics/bronchodilators |          2        0.02        0.32
                    nasal decongestants |          1        0.01        0.33
   antitussives/expectorants/mucolytics |          1        0.01        0.34
                         antihistamines |          8        0.08        0.42
                          cold remedies |          2        0.02        0.44
                                      . |      9,956       99.56      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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