Frequencies for first 10,000 rows of prescr8 variable in nhamcsed2015 dataset :

        Prescription status code for |
                       medication #8 |      Freq.     Percent        Cum.
-------------------------------------+-----------------------------------
                   Prescription drug |        310        3.10        3.10
                Nonprescription drug |         12        0.12        3.22
                        Undetermined |          5        0.05        3.27
Prescription or Nonprescription drug |        122        1.22        4.49
                                   . |      9,551       95.51      100.00
-------------------------------------+-----------------------------------
                               Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 20 Nov 2017