Frequencies for first 10,000 rows of prescr8 variable in namcs2006 dataset :

            for rx8, |
 prescription status |
                code |      Freq.     Percent        Cum.
---------------------+-----------------------------------
   prescription drug |        488        4.88        4.88
nonprescription drug |         76        0.76        5.64
        undetermined |         59        0.59        6.23
                   . |      9,377       93.77      100.00
---------------------+-----------------------------------
               Total |     10,000      100.00

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