Frequencies for first 10,000 rows of rx2v2c3 variable in nhamcsopd2009 dataset :

   for rx2, |
 level 2 of |
multum drug |
category #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,931       99.31       99.31
        064 |         31        0.31       99.62
        065 |         20        0.20       99.82
        101 |         11        0.11       99.93
        270 |          6        0.06       99.99
        430 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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