<Tr> <Th> Exports </Th> <Td> $526.76 billion (6th) (2015) </Td> </Tr> <Tr> <Th> Export goods </Th> <Td> semiconductors, wireless telecommunications equipment, motor vehicles, computers, steel, ships, petrochemicals </Td> </Tr> <Tr> <Th> Main export partners </Th> <Td> China 25.4% United States 12.3% Japan 5.6% Hong Kong 4.8% Singapore 4.2% (2014 est .) </Td> </Tr> <Tr> <Th> Imports </Th> <Td> $542.9 billion (7th; 2014 est .) </Td> </Tr>

After 1947 south korea instituted what type of economic system