It displays the Data in one Reference Table.
Change 'menu-careers.gif' to 'menu-careers-active.gif' to highlight in orange the Careers Page.
An example is shown (commented out) on the bottom Menu Bar.

Data is taken from the 'Ref_ISO_Country_Codes' Table which has two fields :-
country_code_3char CHAR(3)
country_name VARCHAR(255)

This Table definition is an extract of the original ISO Table, which has more columns.