Frequencies for first 10,000 rows of rx2cat3 variable in nhamcsopd2006 dataset :

     for rx2, multum drug category #3 - |
                               detailed |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
Respiratory agents: bronchodilators: ad |          1        0.01        0.01
     Hormones: sex hormones: progestins |         11        0.11        0.12
CNS: Antiemetic/antivertigo agents: ant |         26        0.26        0.38
   Miscellaneous agents: antipsoriatics |          9        0.09        0.47
                                      . |      9,953       99.53      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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