<Tr> <Th> Concepts </Th> </Tr> <Tr> <Td> <Ul> <Li> Administrative detention </Li> <Li> Citizenship </Li> <Li> Immigration (illegal) </Li> <Li> Jus sanguinis </Li> <Li> Jus soli </Li> <Li> Nationality </Li> <Li> Naturalization </Li> <Li> Permanent residency </Li> <Li> Statelessness </Li> </Ul> </Td> </Tr> <Ul> <Li> Administrative detention </Li> <Li> Citizenship </Li> <Li> Immigration (illegal) </Li> <Li> Jus sanguinis </Li> <Li> Jus soli </Li> <Li> Nationality </Li> <Li> Naturalization </Li> <Li> Permanent residency </Li> <Li> Statelessness </Li> </Ul> <Li> Immigration (illegal) </Li>

How many countries in the world allow dual citizenship