<Tr> <Th> School </Th> <Th> Total </Th> <Th> Men </Th> <Th> Women </Th> <Th> Co-ed </Th> <Th> Nickname </Th> </Tr> <Tr> <Td> Yale University </Td> <Td> 29 </Td> <Td> 26 </Td> <Td> </Td> <Td> 0 </Td> <Td> Bulldogs </Td> </Tr> <Tr> <Td> Princeton University </Td> <Td> 24 </Td> <Td> 19 </Td> <Td> </Td> <Td> </Td> <Td> Tigers </Td> </Tr> <Tr> <Td> Columbia University </Td> <Td> 14 </Td> <Td> 11 </Td> <Td> 0 </Td> <Td> </Td> <Td> Lions </Td> </Tr>

Where did the expression ivy league come from