Frequencies for first 10,000 rows of rx1v2c4 variable in nhamcsed2007 dataset :

   for rx1, |
 level 2 of |
multum drug |
category #4 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,913       99.13       99.13
        066 |         87        0.87      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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