Frequencies for first 10,000 rows of rx2v1c3 variable in nhamcsopd2007 dataset :

   for rx2, |
 level 1 of |
multum drug |
category #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,948       99.48       99.48
        057 |         43        0.43       99.91
        097 |          5        0.05       99.96
        105 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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