Frequencies for first 10,000 rows of rx1v1c4 variable in nhamcsopd2010 dataset :

   for rx1, |
 level 1 of |
multum drug |
category #4 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,954       99.54       99.54
        057 |         28        0.28       99.82
        254 |         18        0.18      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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