The top 10 richest people in the world have a combined worth of 342 billion dollars in 2010, up from 254 billion a year ago.

Here are the 20 wealthiest, as announced Wednesday by Forbes magazine in its annual list of the world’s billionaires:

1. Carlos Slim Helu and family. Mexico. Telecoms. 53.5 billion dollars.

2. Bill Gates. US. Microsoft. 53 billion dollars.

3. Warren Buffett. US. Berkshire Hathaway. 47 billion dollars.

4. Mukesh Ambani. India. Oil, gas. 29 billion dollars.

5. Lakshmi Mittal. India. Steel. 28.7 billion dollars.

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6. Lawrence Ellison. US. Oracle. 28 billion dollars.

7. Bernard Arnault. France. LVMH luxury goods. 27.5 billion dollars.

8. Eike Batista. Brazil. Mining, oil. 27 billion dollars.

9. Amancio Ortega. Spain. Clothing retail. 25 billion dollars.

10. Karl Albrecht. Germany. Supermarkets. 23.5 billion dollars.

11. Ingvar Kamprad and family. Sweden. Ikea. 23 billion dollars.

12. Christy Walton and family. US. Walmart. 22.5 billion dollars.

13. Stefan Persson. Sweden. Hennes and Mauritz. 22.4 billion dollars.

14. Li Ka-shing. Hong Kong. Diversified. 21 billion dollars.

15. Jim Walton. US. Walmart. 20.7 billion dollars.

16. Alice Walton. US. Walmart. 20.6 billion dollars.

17. Liliane Bettencourt. France. L’Oreal. 20 billion dollars.

18. S. Robson Walton. Walmart. 19.8 billion dollars.

19. Prince Alwaleed Bin Talal Alsaud. Saudi Arabia. Investments. 19.4 billion dollars.

20. David Thomson and family. Canada. Inheritance. 19 billion dollars.