<Tr> <Th> 1918 </Th> <Td> 16% </Td> <Td> 21% </Td> <Td> 41% </Td> <Td> 64% </Td> <Td> 72% </Td> </Tr> <Tr> <Th> 1920 </Th> <Td> 12% </Td> <Td> 17% </Td> <Td> 37% </Td> <Td> 60% </Td> <Td> 68% </Td> </Tr> <Tr> <Th> 1922 </Th> <Td> 10% </Td> <Td> 16% </Td> <Td> 36% </Td> <Td> 56% </Td> <Td> 58% </Td> </Tr> <Tr> <Th> 1924 </Th> <Td> 7% </Td> <Td> 11% </Td> <Td> 27% </Td> <Td> 43% </Td> <Td> 44% </Td> </Tr>

Who does not pay income tax in the united states