Frequencies for first 10,000 rows of prescr8 variable in nhamcsed2006 dataset :

            for rx8, |
 prescription status |
                code |      Freq.     Percent        Cum.
---------------------+-----------------------------------
   prescription drug |         34        0.34        0.34
nonprescription drug |          5        0.05        0.39
        undetermined |          6        0.06        0.45
                   . |      9,955       99.55      100.00
---------------------+-----------------------------------
               Total |     10,000      100.00

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