<Tr> <Td_colspan="2"> <Table> <Tr> <Th> ‰ </Th> <Th> ‱ </Th> </Tr> <Tr> <Th> Per mille </Th> <Th> Per ten thousand </Th> </Tr> </Table> </Td> </Tr> <Table> <Tr> <Th> ‰ </Th> <Th> ‱ </Th> </Tr> <Tr> <Th> Per mille </Th> <Th> Per ten thousand </Th> </Tr> </Table> <Tr> <Th> ‰ </Th> <Th> ‱ </Th> </Tr> <Tr> <Th> Per mille </Th> <Th> Per ten thousand </Th> </Tr>

When was a symbol for percent first used