<Tr> <Td> 5 </Td> <Td> Tejay van Garderen (USA) </Td> <Td> BMC Racing Team </Td> <Td> + 11' 24" </Td> <Td> </Td> </Tr> <Tr> <Td> 6 </Td> <Td> Romain Bardet (FRA) </Td> <Td> Ag2r--La Mondiale </Td> <Td> + 11' 26" </Td> <Td> </Td> </Tr> <Tr> <Td> 7 </Td> <Td> Leopold Konig (CZE) </Td> <Td> NetApp--Endura </Td> <Td> + 14' 32" </Td> <Td> </Td> </Tr> <Tr> <Td> 8 </Td> <Td> Haimar Zubeldia (ESP) </Td> <Td> Trek Factory Racing </Td> <Td> + 17' 57" </Td> <Td> </Td> </Tr>

What percentage of tour de france cyclists dope