Frequencies for first 10,000 rows of rx7cat3 variable in namcs2009 dataset :

   for rx7, |
multum drug |
category #3 |
 - detailed |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,988       99.88       99.88
        185 |          2        0.02       99.90
        197 |          1        0.01       99.91
        203 |          7        0.07       99.98
        270 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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