<Tr> <Td> 7001610000000000000 ♠--</Td> <Td> 7001510000000000000 ♠ 51 </Td> <Td> District of Columbia </Td> <Td> 693,972 </Td> <Td> 601,767 </Td> <Td> 1 (non-voting) </Td> <Td>--</Td> <Td>--</Td> <Td> 0.21% </Td> </Tr> <Tr> <Td> 7001490000000000000 ♠ 49 </Td> <Td> 7001500000000000000 ♠ 50 </Td> <Td> Vermont </Td> <Td> 623,657 </Td> <Td> 625,745 </Td> <Td> 7000100000000000000 ♠ 1 </Td> <Td> 623,657 </Td> <Td> 625,745 </Td> <Td> 0.19% </Td> </Tr> <Tr> <Td> 7001500000000000000 ♠ 50 </Td> <Td> 7001520000000000000 ♠ 52 </Td> <Td> Wyoming </Td> <Td> 579,315 </Td> <Td> 563,767 </Td> <Td> 7000100000000000000 ♠ 1 </Td> <Td> 579,315 </Td> <Td> 563,767 </Td> <Td> 0.18% </Td> </Tr> <Tr> <Td> 7001720000000000000 ♠--</Td> <Td> 7001530000000000000 ♠ 53 </Td> <Td> Guam </Td> <Td> 167,358 </Td> <Td> 159,358 </Td> <Td> 1 (non-voting) </Td> <Td>--</Td> <Td>--</Td> <Td> 0.06% </Td> </Tr>

What is the least populated state in the union