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Forbes Magazine has released its 2013 list of the world's richest billionaires, and for the fourth year in a row, Mexican telecom magnate Carlos Slim (left) topped the list with a net worth of $73 billion - which is $4 billion more than last year.
Notable Americans on the list included Microsoft founder Bill Gates (No. 2, $61 billion), and Spain's wealthiest individual, Amancio Ortega (No. 3, $57 billion).
Among the 1,426 billionaires on the list are nine people who call Massachusetts home. Click through to the state's billionaires. All data from Forbes list of the World's Billionaires .
