Here's the list of top twenty from Forbes:
1. Bill Gates, US$56.0 billion, United States
2. Warren Buffett, US$52.0 billion, United States
3. Carlos Slim HelĂș, US$49.0 billion, Mexico
4. Ingvar Kamprad, US$33.0 billion, Sweden
5. Lakshmi Mittal, US$32.0 billion, India
6. Sheldon Adelson, US$26.5 billion, United States
7. Bernard Arnault, US$26.0 billion, France
8. Amancio Ortega, US$24.0 billion, Spain
9. Li Ka-shing, US$23.0 billion, Hong Kong
10. David Thomson, US$22.0 billion, Canada
11. Lawrence Ellison, US$21.5 billion, United States
12. Liliane Bettencourt, US$20.7 billion, France
13. Prince Alwaleed Bin Talal Alsaud,
US$20.3 billion, Saudi Arabia
14. Mukesh Ambani, US$20.1 billion, India
15. Karl Albrecht, US$20.0 billion, Germany
16. Roman Abramovich, US$18.7 billion, Russia
17. Stefan Persson, US$18.4 billion, Sweden
18. Anil Ambani, US$18.2 billion, India
19. Paul Allen, US$18.0 billion, United States
20. Theo Albrecht, US$17.5 billion, Germany
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