Frequencies for first 10,000 rows of rx6cat3 variable in nhamcsed2006 dataset :

     for rx6, multum drug category #3 - |
                               detailed |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
respiratory agents: bronchodilators: ad |          2        0.02        0.02
cns: antiemetic/antivertigo agents: ant |          4        0.04        0.06
cns: anticonvulsants: miscellaneous ant |          1        0.01        0.07
miscellaneous agents: genitourinary tra |          2        0.02        0.09
                                      . |      9,991       99.91      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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