Frequencies for first 10,000 rows of rx4v1c4 variable in nhamcsed2007 dataset :

   for rx4, |
 level 1 of |
multum drug |
category #4 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,981       99.81       99.81
        057 |         19        0.19      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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