<Tr> <Td> St. Paul, MN </Td> <Td> 7 </Td> <Td> </Td> <Td> </Td> <Td> 5 </Td> <Td> 9.5 </Td> </Tr> <Tr> <Td> Boston, MA </Td> <Td> 8 </Td> <Td> 8 </Td> <Td> 10 </Td> <Td> 11 </Td> <Td> 7 </Td> </Tr> <Tr> <Td> Cincinnati, OH </Td> <Td> 9 </Td> <Td> 10.5 </Td> <Td> 11 </Td> <Td> 7 </Td> <Td> 9.5 </Td> </Tr> <Tr> <Td> Denver, CO </Td> <Td> 10 </Td> <Td> 7 </Td> <Td> </Td> <Td> 8 </Td> <Td> 6 </Td> </Tr>

What is the literacy rate of the united states