Frequencies for first 10,000 rows of rx4v1c3 variable in namcs2007 dataset :

   for rx4, |
 level 1 of |
multum drug |
category #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,973       99.73       99.73
        057 |         20        0.20       99.93
        097 |          3        0.03       99.96
        105 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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