Frequencies for first 10,000 rows of prescr6 variable in nhamcsed2008 dataset :

   for rx6, prescription status code |      Freq.     Percent        Cum.
-------------------------------------+-----------------------------------
                   prescription drug |        324        3.24        3.24
                nonprescription drug |         27        0.27        3.51
                        undetermined |          8        0.08        3.59
prescription or nonprescription drug |         93        0.93        4.52
                                   . |      9,548       95.48      100.00
-------------------------------------+-----------------------------------
                               Total |     10,000      100.00

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