Frequencies for first 10,000 rows of rx1cat3 variable in nhamcsed2008 dataset :

   for rx1, |
multum drug |
category #3 |
 - detailed |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,760       97.60       97.60
        197 |         99        0.99       98.59
        203 |        139        1.39       99.98
        204 |          1        0.01       99.99
        270 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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