<Tr> <Th> 18 October 1980 election </Th> <Td> 45.2% </Td> <Td> 46.3% </Td> <Td> 8.5% </Td> <Td> 49.6% </Td> <Td> 50.4% </Td> <Td> 51 </Td> <Td> 74 </Td> <Td> 0 </Td> <Td> 125 </Td> </Tr> <Tr> <Th> 5 March 1983 election </Th> <Td> 49.5% </Td> <Td> 43.6% </Td> <Td> 6.9% </Td> <Td> 53.2% </Td> <Td> 46.8% </Td> <Td> 75 </Td> <Td> 50 </Td> <Td> 0 </Td> <Td> 125 </Td> </Tr> <Tr> <Th> 1 December 1984 election </Th> <Td> 47.6% </Td> <Td> 45.0% </Td> <Td> 7.4% </Td> <Td> 51.8% </Td> <Td> 48.2% </Td> <Td> 82 </Td> <Td> 66 </Td> <Td> 0 </Td> <Td> 148 </Td> </Tr> <Tr> <Th> 11 July 1987 election </Th> <Td> 45.8% </Td> <Td> 46.1% </Td> <Td> 8.1% </Td> <Td> 50.8% </Td> <Td> 49.2% </Td> <Td> 86 </Td> <Td> 62 </Td> <Td> 0 </Td> <Td> 148 </Td> </Tr>

How are house of representatives elected in australia