In its inaugural ranking of the world's richest people 20 years ago, Forbes said there were about 140 billionaires. This year a total of 793 people are considered billionaires. The last year another 102 people reached billionaire status, the magazine's editors said.
Forbes said the people on the list are worth a combined $2.6 trillion, 18 percent more than a year ago, and have and average net worth of $3.3 billion.
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