Frequencies for first 10,000 rows of rx4v3c3 variable in nhamcsed2009 dataset :

   for rx4, |
 level 3 of |
multum drug |
category #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,937       99.37       99.37
        197 |         32        0.32       99.69
        203 |         29        0.29       99.98
        204 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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