<Tr> <Td> </Td> <Td> 1: Bob Johnson $1.6 billion </Td> <Td> 1: Michael Lee - Chin $1 billion </Td> <Td> 538, Richest: Bill Gates $58.7 billion </Td> </Tr> <Tr> <Td> 2002 </Td> <Td> 1: Bob Johnson $1 billion </Td> <Td> 2: <Ul> <Li> Mohammad Al Amoudi $1.5 billion </Li> <Li> Michael Lee - Chin $1.1 billion </Li> </Ul> </Td> <Td> 497, Richest: Bill Gates $52.8 billion </Td> </Tr> <Ul> <Li> Mohammad Al Amoudi $1.5 billion </Li> <Li> Michael Lee - Chin $1.1 billion </Li> </Ul> <Li> Mohammad Al Amoudi $1.5 billion </Li>

How many african american billionaires are there in the united states