Frequencies for first 10,000 rows of drug8cl3 variable in nhamcsed2003 dataset :

        drug class #3 for medication #8 |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                       topical steroids |          1        0.01        0.01
                           antipyretics |          5        0.05        0.06
                                      . |      9,994       99.94      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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