Frequencies for first 10,000 rows of rx4cat3 variable in nhamcsed2006 dataset :

     for rx4, multum drug category #3 - |
                               detailed |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
respiratory agents: bronchodilators: ad |          6        0.06        0.06
cns: antiemetic/antivertigo agents: ant |         15        0.15        0.21
cns: anticonvulsants: miscellaneous ant |          1        0.01        0.22
miscellaneous agents: genitourinary tra |          2        0.02        0.24
   miscellaneous agents: antipsoriatics |          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