Frequencies for first 10,000 rows of rx6v1c3 variable in nhamcsopd2009 dataset :

   for rx6, |
 level 1 of |
multum drug |
category #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,967       99.67       99.67
        057 |         22        0.22       99.89
        097 |          3        0.03       99.92
        105 |          5        0.05       99.97
        113 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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