<Table> <Tr> <Th> Year </Th> <Th> Water level (m) </Th> <Th> Surface (km) </Th> </Tr> <Tr> <Td> 1930 </Td> <Td> − 390 </Td> <Td> 1050 </Td> </Tr> <Tr> <Td> 1980 </Td> <Td> − 400 </Td> <Td> 680 </Td> </Tr> <Tr> <Td> </Td> <Td> − 407 </Td> <Td> 675 </Td> </Tr> <Tr> <Td> </Td> <Td> − 411 </Td> <Td> 670 </Td> </Tr> <Tr> <Td> </Td> <Td> − 417 </Td> <Td> 662 </Td> </Tr> <Tr> <Td> </Td> <Td> − 423 </Td> <Td> 655 </Td> </Tr> <Tr> <Td> 2016 </Td> <Td> − 430.5 </Td> <Td> 605 </Td> </Tr> </Table> <Tr> <Th> Year </Th> <Th> Water level (m) </Th> <Th> Surface (km) </Th> </Tr> <Tr> <Td> 1930 </Td> <Td> − 390 </Td> <Td> 1050 </Td> </Tr> <Tr> <Td> 1980 </Td> <Td> − 400 </Td> <Td> 680 </Td> </Tr>

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