In the U.S., 480 people are billionaires whose total wealth amounts to $2.05 trillion. Despite economic troubles, the number of U.S. billionaires increased by 25 people or 5.5% last year. Their overall wealth grew 8%. However, billionaires account for less than 1% among the ultrarich possessing a fortune of over $30 million each. The total wealth of the U.S. ultrarich is estimated at $8.28 trillion.