Frequencies for first 10,000 rows of rx3cat3 variable in nhamcsopd2006 dataset :

     for rx3, multum drug category #3 - |
                               detailed |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
Respiratory agents: bronchodilators: ad |          2        0.02        0.02
     Hormones: sex hormones: progestins |          4        0.04        0.06
CNS: Antiemetic/antivertigo agents: ant |         17        0.17        0.23
   Miscellaneous agents: antipsoriatics |          4        0.04        0.27
                                      . |      9,973       99.73      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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