<Tr> <Th> </Th> <Td> Manam </Td> <Td> Papua New Guinea </Td> <Td> </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Th> </Th> <Td> Rabaul </Td> <Td> Papua New Guinea </Td> <Td> 2006 </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Th> </Th> <Td> Mount Okmok </Td> <Td> United States </Td> <Td> 2008 </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Th> </Th> <Td> Chaiten </Td> <Td> Chile </Td> <Td> 2008 </Td> <Td> </Td> <Td> </Td> </Tr>

When is the last time a volcano erupted