The top 10 richest people on the planet

Mexican tycoon Carlos Slim retained his position atop Forbes magazines annual list of the world's billionaires with an estimated worth of $69bn.

No.1: Carlos Slim Helu & family $69bn Age: 72 Industry/ Company: Telecom Country: Mexico Source: Forbes ‘The World’s Billionaire’s List, March 2012

No.2: Bill Gates $61bn Age: 56 Industry/ Company: Microsoft Country: United States Source: Forbes ‘The World’s Billionaire’s List, March 2012

No.3: Warren Buffett $44bn Age: 81 Industry/ Company: Berkshire Hathaway Country: United States Source: Forbes ‘The World’s Billionaire’s List, March 2012

No.4: Bernard Arnault $41bn Age: 63 Industry/ Company: LVMH Country: France Source: Forbes ‘The World’s Billionaire’s List, March 2012

No.5: Amancio Ortega $37.5bn Age: 75 Industry/ Company: Zara Country: Spain Source: Forbes ‘The World’s Billionaire’s List, March 2012

No.6: Larry Ellison $36bn Age: 67 Industry/ Company: Oracle Country: United States Source: Forbes ‘The World’s Billionaire’s List, March 2012

No.7: Eike Batista $30bn Age: 55 Industry/ Company: mining, oil Country: Brazil Source: Forbes ‘The World’s Billionaire’s List, March 2012

No.8: Stefan Persson $26bn Age: 64 Industry/ Company: H&M Country: Sweden Source: Forbes ‘The World’s Billionaire’s List, March 2012

No.9: Li Ka-shing $25.5bn Age: 83 Industry/ Company: diversified Country: Hong Kong Source: Forbes The World’s Billionaires List, March 2012

No.10: Karl Albrecht $25.4bn Age: 92 Industry/ Company: Aldi Country: Germany Source: Forbes The World’s Billionaires List, March 2012