Who wants to be a billionaire?
The new Forbes list of the world's richest people shows that there are more 1200 billionaires across the world.
The record figure includes more than 100 billionaires in both China and Russia - previously only the United States had reached that level.
The world's richest man was Mexican Telecoms tycoon Carlos Slim Helu, who topped the list for a second year and increased his wealth by $20.5bn to $74bn.
Caroline Hepker reports.
- BBC News