Frequencies for first 10,000 rows of rx7cat2 variable in nhamcsed2006 dataset :

     for rx7, multum drug category #2 - |
                               detailed |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
anti-infectives: miscellaneous antibiot |          3        0.03        0.03
    cardiovascular agents: vasodilators |          4        0.04        0.07
miscellaneous agents: local injectable  |          1        0.01        0.08
nutritional products: minerals and elec |          1        0.01        0.09
     respiratory agents: antihistamines |          1        0.01        0.10
respiratory agents: miscellaneous respi |          2        0.02        0.12
   miscellaneous agents: antirheumatics |          2        0.02        0.14
cns: antiemetic/antivertigo agents: phe |          2        0.02        0.16
cns: antiemetic/antivertigo agents: mis |          3        0.03        0.19
cns: anticonvulsants: benzodiazepine an |          2        0.02        0.21
psychotherapeutic agents: antipsychotic |          1        0.01        0.22
anti-infectives: antimalarial agents: a |          1        0.01        0.23
anti-infectives: antimalarial agents: m |          1        0.01        0.24
topical agents: vaginal preprations: va |          1        0.01        0.25
                                      . |      9,975       99.75      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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