Frequencies for first 10,000 rows of rx3v1c3 variable in namcs2007 dataset :

   for rx3, |
 level 1 of |
multum drug |
category #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,962       99.62       99.62
        057 |         28        0.28       99.90
        097 |          4        0.04       99.94
        105 |          6        0.06      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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