The ranking of the world's 20 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.

1. William (Bill) 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 (he's of Lebanese decent)
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
12. John Walton, Arkansas, 59, $18.2, Wal-Mart
13. Alice Walton, Texas, 56, $18, Wal-Mart
14. 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
18. Michael Dell, Texas, 40, $16, Dell
19. Sheldon Adelson, Nevada, 71, $15.6, casinos, hotels
20. Theo Albrecht, Germany, 83, $15.5, supermarkets

Note:
.For the eleventh year in a row, Microsoft Corp. founder Bill Gates toped the latest Forbes' Billionaires List with a net worth of $46.5 billion, slightly less than his $46.6 billion last year.

.The number of billionaires grew to a record 691 from the last year's 587, and their total net worth rose by $300 billion to $2.2 trillion.

.The United States, with 341 billionaires, still ranked No. 1 in the world.

.Saad Al-Harriri, 33, son of the late Rafik Al-Harriri ranked 548 with a net worth of $ 1.2 billion dollars. His late father ranked 108 on last year's list.

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