Frequencies for first 10,000 rows of rx6v2c3 variable in nhamcsed2007 dataset :

   for rx6, |
 level 2 of |
multum drug |
category #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,981       99.81       99.81
        064 |          9        0.09       99.90
        065 |          8        0.08       99.98
        113 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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