Frequencies for first 10,000 rows of rx3v1c3 variable in nhamcsopd2009 dataset :

   for rx3, |
 level 1 of |
multum drug |
category #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,940       99.40       99.40
        057 |         47        0.47       99.87
        097 |          7        0.07       99.94
        105 |          5        0.05       99.99
        113 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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