Frequencies for first 10,000 rows of rx7cat3 variable in nhamcsed2006 dataset :

     for rx7, multum drug category #3 - |
                               detailed |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
cns: antiemetic/antivertigo agents: ant |          1        0.01        0.01
   miscellaneous agents: antipsoriatics |          1        0.01        0.02
                                      . |      9,998       99.98      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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