Frequencies for first 10,000 rows of rx3v1c3 variable in nhamcsed2009 dataset :

   for rx3, |
 level 1 of |
multum drug |
category #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,909       99.09       99.09
        040 |          4        0.04       99.13
        057 |         83        0.83       99.96
        113 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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