Frequencies for first 10,000 rows of prescr8 variable in nhamcsopd2008 dataset :

            for rx8, |
 prescription status |
                code |      Freq.     Percent        Cum.
---------------------+-----------------------------------
   prescription drug |        708        7.08        7.08
nonprescription drug |         49        0.49        7.57
        undetermined |         28        0.28        7.85
                   5 |        137        1.37        9.22
                   . |      9,078       90.78      100.00
---------------------+-----------------------------------
               Total |     10,000      100.00

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