In billions of dollars.

1. China - 2210
2. European Union - 2173
3. USA - 1575
4. United Kingdom - 813
5. Japan - 697
6. South Korea - 557
7. Russia - 523
8. Canada 458
9. Singapore - 410
10. Saudi Arabia 376

In Europe :

1. Germany - 1493
2. United Kingdom - 813
3. France - 578
4. Netherlands - 578
5. Italy - 474
6. Spain - 458

2013 data.

Source : CIA.