<P> Chamorro is co-official in the Mariana Islands, both in the territory of Guam and in the Commonwealth of the Northern Mariana Islands . In Guam, the indigenous Chamorro people make up about 60% of the population . </P> <P> Carolinian is also co-official in the Northern Marianas, where only 14% of people speak English at home . </P> <Table> <Tr> <Td> </Td> <Td> This section may lend undue weight to certain ideas, incidents, or controversies . Please help to create a more balanced presentation . Discuss and resolve this issue before removing this message . (July 2016) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This section may lend undue weight to certain ideas, incidents, or controversies . Please help to create a more balanced presentation . Discuss and resolve this issue before removing this message . (July 2016) </Td> </Tr>

When did english became official language of us