<Tr> <Td> 1966 </Td> <Td> 787.8 </Td> <Td> 3399.1 </Td> <Td> 195.576 </Td> <Td> 4028 </Td> <Td> 17380 </Td> </Tr> <Tr> <Td> 1967 </Td> <Td> 832.6 </Td> <Td> 3484.6 </Td> <Td> 197.457 </Td> <Td> 4217 </Td> <Td> 17647 </Td> </Tr> <Tr> <Td> 1968 </Td> <Td> 911.0 </Td> <Td> 3652.7 </Td> <Td> 199.399 </Td> <Td> 4564 </Td> <Td> 18319 </Td> </Tr> <Tr> <Td> 1969 </Td> <Td> 984.6 </Td> <Td> 3765.4 </Td> <Td> 201.385 </Td> <Td> 4889 </Td> <Td> 18698 </Td> </Tr>

What type of economic system is the us