Spending in US dollars 1. USA $647,000,000,000 2. China $151,000,000,000 3. Saudi Arabia $56,725,000,000 4. United Kingdom $50,000,000,000 5. India $47,000,000,000 6. Russia $47,000,000,000 7. Germany $45,200,000,000 8. Japan $44,000,000,000 9. France $40,000,000,000 10. South Korea $40,000,000,000