Frequencies for first 10,000 rows of rx4v2c3 variable in nhamcsed2009 dataset :

   for rx4, |
 level 2 of |
multum drug |
category #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,931       99.31       99.31
        064 |         31        0.31       99.62
        065 |         32        0.32       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