<Tr> <Td> 1973 </Td> <Td> 523 </Td> <Td> 506 </Td> </Tr> <Tr> <Td> </Td> <Td> 521 </Td> <Td> 505 </Td> </Tr> <Tr> <Td> </Td> <Td> 512 </Td> <Td> 498 </Td> </Tr> <Tr> <Td> 1976 </Td> <Td> 509 </Td> <Td> 497 </Td> </Tr>

What was the highest sat score in 1993