<Table> Education in the United States of America <Tr> <Th_colspan="2"> National education budget (2007) </Th> </Tr> <Tr> <Th> Budget </Th> <Td> $1 trillion (public and private, all levels) </Td> </Tr> <Tr> <Th_colspan="2"> General details </Th> </Tr> <Tr> <Th> Primary languages </Th> <Td> English </Td> </Tr> <Tr> <Th> System type </Th> <Td> State, private </Td> </Tr> <Tr> <Th_colspan="2"> Literacy </Th> </Tr> <Tr> <Th> Male </Th> <Td> 100% </Td> </Tr> <Tr> <Th> Female </Th> <Td> 100% </Td> </Tr> <Tr> <Th_colspan="2"> Enrollment </Th> </Tr> <Tr> <Th> Total </Th> <Td> 81.5 million </Td> </Tr> <Tr> <Th> Primary </Th> <Td> 37.9 million </Td> </Tr> <Tr> <Th> Secondary </Th> <Td> 26.1 million (2006--2007) </Td> </Tr> <Tr> <Th> Post secondary </Th> <Td> 20.5 million </Td> </Tr> <Tr> <Th_colspan="2"> Attainment </Th> </Tr> <Tr> <Th> Secondary diploma </Th> <Td> 81% </Td> </Tr> <Tr> <Th> Post-secondary diploma </Th> <Td> 30% </Td> </Tr> <Tr> <Td_colspan="2"> Includes kindergarten Includes graduate school </Td> </Tr> </Table> <Tr> <Th_colspan="2"> National education budget (2007) </Th> </Tr>

How many students attend school in the united states