Frequencies for first 10,000 rows of rx1v1c3 variable in namcs2007 dataset :

   for rx1, |
 level 1 of |
multum drug |
category #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,930       99.30       99.30
        057 |         53        0.53       99.83
        097 |         13        0.13       99.96
        105 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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