Frequencies for first 10,000 rows of rx1v3c3 variable in nhamcsed2009 dataset :

   for rx1, |
 level 3 of |
multum drug |
category #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,727       97.27       97.27
        185 |          3        0.03       97.30
        197 |        124        1.24       98.54
        203 |        141        1.41       99.95
        204 |          4        0.04       99.99
        374 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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