The ranking of the world's richest people as estimated by Forbes magazine. Listings include rank, name, home country or state, age where known, wealth in billions of dollars and source of the money.

Listings where the home country is United States are for American citizens living abroad.

1. William Gates III, Washington, 49, $46.5, Microsoft

2. Warren Buffett, Nebraska, 74, $44, Berkshire Hathaway

3. Lakshmi Mittal, India, 54, $25, steel

4. Carlos Slim Helu, Mexico, 65, $23.8, telecom

5. Prince Alwaleed Bin Talal Alsaud, Saudi Arabia, 48, $23.7, investments

6. Ingvar Kamprad, Sweden, 78, $23, Ikea

7. Paul Allen, Washington, 52, $21, Microsoft, investments

8. Karl Albrecht, Germany, 85, $18.5, supermarkets

9. Lawrence Ellison, California, 60, $18.4, Oracle

10. S. Robson Walton, Arkansas, 61, $18.3, Wal-Mart

11. Jim Walton, Arkansas, 57, $18.2, Wal-Mart

11. John Walton, Arkansas, 59, $18.2, Wal-Mart

13. Alice Walton, Texas, 56, $18, Wal-Mart

13. Helen Walton, Arkansas, 85, $18, Wal-Mart

15. Kenneth Thomson and family, Canada, 81, $17.9, publishing

16. Liliane Bettencourt, France, 82, $17.2, L'Oreal

17. Bernard Arnault, France, 56, $17, LVMH