<Table> U.S. Open champions by nationality <Tr> <Th> Nationality </Th> <Th> Wins </Th> <Th> Winners </Th> </Tr> <Tr> <Th> United States </Th> <Td> 84 </Td> <Td> 58 </Td> </Tr> <Tr> <Th> Scotland </Th> <Td> 13 </Td> <Td> 9 </Td> </Tr> <Tr> <Th> England </Th> <Td> 7 </Td> <Td> 7 </Td> </Tr> <Tr> <Th> South Africa </Th> <Td> </Td> <Td> </Td> </Tr> <Tr> <Th> Jersey </Th> <Td> </Td> <Td> </Td> </Tr> <Tr> <Th> Australia </Th> <Td> </Td> <Td> </Td> </Tr> <Tr> <Th> Northern Ireland </Th> <Td> </Td> <Td> </Td> </Tr> <Tr> <Th> New Zealand </Th> <Td> </Td> <Td> </Td> </Tr> <Tr> <Th> Argentina </Th> <Td> </Td> <Td> </Td> </Tr> <Tr> <Th> Germany </Th> <Td> </Td> <Td> </Td> </Tr> </Table> <Tr> <Th> Nationality </Th> <Th> Wins </Th> <Th> Winners </Th> </Tr> <Tr> <Th> United States </Th> <Td> 84 </Td> <Td> 58 </Td> </Tr> <Tr> <Th> Scotland </Th> <Td> 13 </Td> <Td> 9 </Td> </Tr>

When was the last time an amatuer won the us open