<Tr> <Td> 1964 </Td> <Td> 663.6 </Td> <Td> 2998.6 </Td> <Td> 191.141 </Td> <Td> 3472 </Td> <Td> 15688 </Td> </Tr> <Tr> <Td> 1965 </Td> <Td> 719.1 </Td> <Td> 3191.1 </Td> <Td> 193.526 </Td> <Td> 3716 </Td> <Td> 16489 </Td> </Tr> <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>

Explain the transition of the us economy over time