Frequencies for first 10,000 rows of rx5cat3 variable in nhamcsopd2006 dataset :

     for rx5, multum drug category #3 - |
                               detailed |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
Respiratory agents: bronchodilators: ad |          1        0.01        0.01
     Hormones: sex hormones: progestins |          1        0.01        0.02
CNS: Antiemetic/antivertigo agents: ant |         10        0.10        0.12
                                      . |      9,988       99.88      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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