Frequencies for first 10,000 rows of rx2cat3 variable in namcs2007 dataset :

   for rx2, |
multum drug |
category #3 |
 - detailed |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,931       99.31       99.31
        185 |          7        0.07       99.38
        197 |         20        0.20       99.58
        203 |         30        0.30       99.88
        204 |          2        0.02       99.90
        270 |         10        0.10      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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