Frequencies for first 10,000 rows of rx2v1c3 variable in namcs2007 dataset :

   for rx2, |
 level 1 of |
multum drug |
category #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,931       99.31       99.31
        057 |         52        0.52       99.83
        097 |          7        0.07       99.90
        105 |         10        0.10      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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