Frequencies for first 10,000 rows of rx1cat3 variable in nhamcsopd2006 dataset :

     for rx1, multum drug category #3 - |
                               detailed |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
Respiratory agents: bronchodilators: ad |          7        0.07        0.07
     Hormones: sex hormones: progestins |         74        0.74        0.81
CNS: Antiemetic/antivertigo agents: ant |         19        0.19        1.00
Miscellaneous agents: genitourinary tra |          1        0.01        1.01
   Miscellaneous agents: antipsoriatics |          6        0.06        1.07
                                      . |      9,893       98.93      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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