Frequencies for first 10,000 rows of rx2cat3 variable in namcs2009 dataset :

   for rx2, |
multum drug |
category #3 |
 - detailed |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,938       99.38       99.38
        185 |          4        0.04       99.42
        197 |         17        0.17       99.59
        203 |         30        0.30       99.89
        204 |          2        0.02       99.91
        270 |          9        0.09      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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