Frequencies for first 10,000 rows of drug6cl3 variable in nhamcsed2004 dataset :

        drug class #3 for medication #6 |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                         ace inhibitors |          2        0.02        0.02
                        anticonvulsants |          4        0.04        0.06
                cycloplegics/mydriatics |          1        0.01        0.07
                           antipyretics |         22        0.22        0.29
         antiasthmatics/bronchodilators |          1        0.01        0.30
                         antihistamines |         14        0.14        0.44
                          cold remedies |          1        0.01        0.45
                          surgical aids |          9        0.09        0.54
                                      . |      9,946       99.46      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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