In compiling this year's list of the world's richest billionaires, Forbes found a record 1,426 individuals in the ten-figure fortune club -- 200 more than the total from 2012, which had been itself a record breaking year. Here's a tally of the significant figures: the net worth of this most elite group totals $5.4 trillion, representing a 17% increase from last year. The average net worth of each billionaire stands at $3.8 billion, $100 million more than last year. The U.S. tops the list with 442 billionaires, followed by Asia-Pacific (386), Europe (366), the Americas (129) and the Middle East and Africa (103). The individual leading this year's list is telecom mogul Carlos Slim of Mexico, with a net worth of $73 billion, followed by Microsoft founder and philanthropist Bill Gates ($67 billion) of the U.S., and Amancio Ortega ($57 billion) of Spain, the founding chairman of the Spanish fashion group Inditex, best known for its Zara retail chain. Go here now to check out the full list of the top 500 world's richest billionaires.