Frequencies for first 10,000 rows of rx1v1c3 variable in namcs2009 dataset :

   for rx1, |
 level 1 of |
multum drug |
category #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,922       99.22       99.22
        040 |          1        0.01       99.23
        057 |         57        0.57       99.80
        097 |         14        0.14       99.94
        105 |          6        0.06      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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