Frequencies for first 10,000 rows of drug8cl3 variable in nhamcsopd2003 dataset :

        drug class #3 for medication #8 |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
repl/regs of electrolytes/water balance |          1        0.01        0.01
                        anticonvulsants |          2        0.02        0.03
                cycloplegics/mydriatics |          1        0.01        0.04
                           antipyretics |         26        0.26        0.30
                          antimalarials |          1        0.01        0.31
         antiasthmatics/bronchodilators |          1        0.01        0.32
                         antihistamines |          7        0.07        0.39
                                      . |      9,961       99.61      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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