Frequencies for first 10,000 rows of rx2v2c3 variable in nhamcsed2007 dataset :

   for rx2, |
 level 2 of |
multum drug |
category #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,823       98.23       98.23
        064 |         70        0.70       98.93
        065 |        105        1.05       99.98
        113 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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