SOURCE
All CIA World Factbooks 18 December 2003 to 18 December 2008

DEFINITION
Current military expenditures in US dollars; the figure is calculated by multiplying the estimated defense spending in percentage terms by the gross domestic product (GDP) calculated on an exchange rate basis not purchasing power parity (PPP) terms. Dollar figures for military expenditures should be treated with caution because of different price patterns and accounting methods among nations, as well as wide variations in the strength of their currencies Per $ GDP figures expressed per 1,000 $ gross domestic product

DEFINITION: Current military expenditures in US dollars; the figure is calculated by multiplying the estimated defense spending in percentage terms by the gross domestic product (GDP) calculated on an exchange rate basis not purchasing power parity (PPP) terms. Dollar figures for military expenditures should be treated with caution because of different price patterns and accounting methods among nations, as well as wide variations in the strength of their currencies Per $ GDP figures expressed per 1,000 $ gross domestic product

SOURCE: All CIA World Factbooks 18 December 2003 to 18 December 2008 via NationMaster