Frequencies for first 10,000 rows of rx3v1c3 variable in nhamcsopd2007 dataset :

   for rx3, |
 level 1 of |
multum drug |
category #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,956       99.56       99.56
        057 |         38        0.38       99.94
        097 |          3        0.03       99.97
        105 |          2        0.02       99.99
        218 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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