The richest people in America

Published On: Sep 22 2012 09:00:34 PM CDT   Updated On: Sep 17 2013 01:00:00 AM CDT

Buoyed by public markets, the average net worth of the richest people in America has hit a record $5 billion.

David Koch
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4. David Koch (tie), along with brother Charles, David is co-owner and executive vice president of Koch Industries. Net worth: $36 billion.

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