Frequencies for first 10,000 rows of rx2cat3 variable in nhamcsed2009 dataset :

   for rx2, |
multum drug |
category #3 |
 - detailed |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,829       98.29       98.29
        197 |         86        0.86       99.15
        203 |         76        0.76       99.91
        204 |          5        0.05       99.96
        265 |          1        0.01       99.97
        374 |          1        0.01       99.98
        430 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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