Frequencies for first 10,000 rows of rx8cat2 variable in nhamcsed2006 dataset :

     for rx8, multum drug category #2 - |
                               detailed |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
          anti-infectives: sulfanomides |          1        0.01        0.01
 hormones: sex hormones: contraceptives |          1        0.01        0.02
coagulation modifiers: antiplatelet age |          2        0.02        0.04
topical agents: vaginal preprations: va |          1        0.01        0.05
                                      . |      9,995       99.95      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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