Frequencies for first 10,000 rows of rx1v2c3 variable in nhamcsed2008 dataset :

   for rx1, |
 level 2 of |
multum drug |
category #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,760       97.60       97.60
        064 |        140        1.40       99.00
        065 |         99        0.99       99.99
        270 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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