Frequencies for first 10,000 rows of rx3cat3 variable in nhamcsed2006 dataset :

     for rx3, multum drug category #3 - |
                               detailed |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
respiratory agents: bronchodilators: ad |          7        0.07        0.07
cns: antiemetic/antivertigo agents: ant |         43        0.43        0.50
miscellaneous agents: genitourinary tra |          2        0.02        0.52
                                      . |      9,948       99.48      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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