<Tr> <Th> Gross external debt </Th> <Td> $7.499 trillion (March 2017) (2nd) </Td> </Tr> <Tr> <Th> Net international investment position </Th> <Td> − £ 182 billion / 9.1% GDP (2012) </Td> </Tr> <Tr> <Th_colspan="2"> Public finances </Th> </Tr> <Tr> <Th> Public debt </Th> <Td> £ 1.7 trillion (January 2017) (85.3% GDP) </Td> </Tr>

What type of economic system does united kingdom have