<Tr> <Th> Year </Th> <Th> Wealth (billions in USD) </Th> </Tr> <Tr> <Th> 2006 </Th> <Td> 66,400 </Td> </Tr> <Tr> <Th> 2007 </Th> <Td> 66,450 </Td> </Tr> <Tr> <Th> 2008 </Th> <Td> 56,300 </Td> </Tr>

What's the highest gdp in us history