<P> In the United States Army, soldiers will finish their enlistment contract if they exceed HYT unless they are reduced in rank . </P> <P> Personnel demoted to a lower grade are subject to the HYT date of the lower grade . Extensions to the HYT date can be obtained for various reasons such as personal hardships or base closures . HYT dates vary by rank / rate, as follows: </P> <Table> <Tr> <Th> Ranks </Th> <Th> U.S. Army </Th> <Th> U.S. Army (promotable) </Th> <Th> U.S. Navy (active) </Th> <Th> U.S. Navy (reserves) </Th> <Th> U.S. Air Force </Th> <Th> U.S. Marine Corps (active) </Th> <Th> U.S. Marine Corps (reserves) </Th> <Th> U.S. Coast Guard </Th> </Tr> <Tr> <Td> E-1 </Td> <Td> 5 </Td> <Td> N / A </Td> <Td> </Td> <Td> 6 </Td> <Td> 8 </Td> <Td> N / A </Td> <Td> </Td> <Td> N / A </Td> </Tr> <Tr> <Td> E-2 </Td> <Td> 5 </Td> <Td> N / A </Td> <Td> </Td> <Td> 6 </Td> <Td> 8 </Td> <Td> N / A </Td> <Td> </Td> <Td> N / A </Td> </Tr> <Tr> <Td> E-3 </Td> <Td> 5 </Td> <Td> N / A </Td> <Td> 5 </Td> <Td> 10 </Td> <Td> 8 </Td> <Td> N / A </Td> <Td> </Td> <Td> 10 </Td> </Tr> <Tr> <Td> E-4 </Td> <Td> 8 </Td> <Td> 8 </Td> <Td> 10 </Td> <Td> 12 </Td> <Td> 8 </Td> <Td> 8 </Td> <Td> </Td> <Td> 10 </Td> </Tr> <Tr> <Td> E-5 </Td> <Td> 14 </Td> <Td> 14 </Td> <Td> 16 </Td> <Td> 20 </Td> <Td> 15 </Td> <Td> 10 </Td> <Td> </Td> <Td> 16 </Td> </Tr> <Tr> <Td> E-6 </Td> <Td> 20 </Td> <Td> 26 </Td> <Td> 22 </Td> <Td> 22 </Td> <Td> 20 </Td> <Td> 20 </Td> <Td> </Td> <Td> 20 </Td> </Tr> <Tr> <Td> E-7 </Td> <Td> 26 </Td> <Td> 29 </Td> <Td> 24 </Td> <Td> 24 </Td> <Td> 24 </Td> <Td> 22 </Td> <Td> </Td> <Td> 24 </Td> </Tr> <Tr> <Td> E-8 </Td> <Td> 29 </Td> <Td> 32 </Td> <Td> 26 </Td> <Td> 26 </Td> <Td> 26 </Td> <Td> 27 </Td> <Td> </Td> <Td> 26 </Td> </Tr> <Tr> <Td> E-9 </Td> <Td> 32 </Td> <Td> N / A </Td> <Td> 30 </Td> <Td> 30 </Td> <Td> 30 </Td> <Td> 30 </Td> <Td> </Td> <Td> 30 </Td> </Tr> </Table> <Tr> <Th> Ranks </Th> <Th> U.S. Army </Th> <Th> U.S. Army (promotable) </Th> <Th> U.S. Navy (active) </Th> <Th> U.S. Navy (reserves) </Th> <Th> U.S. Air Force </Th> <Th> U.S. Marine Corps (active) </Th> <Th> U.S. Marine Corps (reserves) </Th> <Th> U.S. Coast Guard </Th> </Tr>

What is the high year tenure for the air force
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