Frequencies for first 10,000 rows of rx2v3c3 variable in nhamcsopd2010 dataset :

   for rx2, |
 level 3 of |
multum drug |
category #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,929       99.29       99.29
        185 |          3        0.03       99.32
        197 |         40        0.40       99.72
        203 |         27        0.27       99.99
        204 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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