<Tr> <Th> GDP (PPP) </Th> <Td> 2016 estimate </Td> </Tr> <Tr> <Th> Total </Th> <Td> $18.558 trillion (2nd) </Td> </Tr> <Tr> <Th> Per capita </Th> <Td> $57,220 (14th) </Td> </Tr> <Tr> <Th> GDP (nominal) </Th> <Td> 2016 estimate </Td> </Tr>

When did the united states became a republic