To make it onto the Forbes 400 list of the richest Americans, a mere billionaire no longer makes the cut.

富人越来越富，福布斯评选出美国400名最富有的人，不被淘汰的亿万富翁屈指可数。

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To make it onto the first list in 1982, you needed a net worth of $75m; by 2006 you had to be a billionaire.

在1982年，要成为榜单的头名，你需要7500万美元资产；到2006年，你就要成为亿万富翁才行。

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Indians already hold four of the top eight slots on the Forbes billionaire list, while Mexico's Carlos Slim has surpassed bill Gates to claim the No. 2 spot.

在《福布斯》亿万富翁榜上，印度人占据了前八位中的四个，墨西哥的卡洛斯·斯利姆(Carlos Slim)超过比尔·盖茨(Bill Gates)成为全球第二富豪。

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Here is our full list of average billionaire net worth by country.

FORBES: Average Billionaire Net Worth By Country: Full List

In compiling a list of the billionaire art collectors, it was important to shift the focus onto those men and women who are true aficionados, not mere dabblers or enthusiastic amateurs.

FORBES: Top Billionaire Art Collectors

In this issue we have refined our list of billionaires and billionaire families.

FORBES: Thoughts From Billionaires Past And Present