Frequencies for first 10,000 rows of rx4cat3 variable in nhamcsed2009 dataset :

   for rx4, |
multum drug |
category #3 |
 - detailed |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,931       99.31       99.31
        197 |         32        0.32       99.63
        203 |         29        0.29       99.92
        204 |          2        0.02       99.94
        265 |          4        0.04       99.98
        430 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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