The World's Billionaires

Columns: No | Name | Net worth ( USD ) | Age | Nationality | Source ( s ) of wealth
1 | Bill Gates | $ 46.5 billion | 49 | United States | Microsoft | 2 | Warren Buffett | $ 44.0 billion | 74 | United States | Berkshire Hathaway | 3 | Lakshmi Mittal | $ 25.0 billion | 54 | India | Mittal Steel Company | 4 | Carlos Slim | $ 23.8 billion | 65 | Mexico | América Móvil , Grupo Carso | 5 | Al-Waleed bin Talal | $ 23.7 billion | 49 | Saudi Arabia | Kingdom Holding Company | 6 | Ingvar Kamprad | $ 23.0 billion | 79 | Sweden | IKEA | 7 | Paul Allen | $ 21.0 billion | 52 | United States | Microsoft | 8 | Karl Albrecht | $ 18.5 billion | 85 | Germany | Aldi Süd | 9 | Larry Ellison | $ 18.4 billion | 60 | United States | Oracle Corporation | 10 | S. Robson Walton | $ 18.3 billion | 61 | United States | Walmart

Example questions:
What percentage of ArcelorMittal does the Indian billionaire that was on the World 's Billionaires list in 2005 , own ? | What is the name of the brother of the German billionaire that was on the World 's Billionaires list in 2005 ? | What is the full name of the Mexican billionaire that was on the World 's Billionaires list in 2005 ? | What state was the richest person that was on the World 's Billionaires list in 2005 , born in ?

Answers:
38% | Theo | Carlos Slim Helú | Washington