<Tr> <Th> Fiscal year </Th> <Td> Calendar year </Td> </Tr> <Tr> <Th> Trade organisations </Th> <Td> EU, WTO and OECD </Td> </Tr> <Tr> <Th_colspan="2"> Statistics </Th> </Tr> <Tr> <Th> GDP </Th> <Td> $2 trillion (nominal, 2018) $1.990 trillion (PPP, 2017) </Td> </Tr>

Which of the following is not a main source of economic growth in any economy