<P> Since the addition of Italy in 2000, the Grand Slam (now requiring five victories) has been achieved ten times . No team has yet been denied a Grand Slam solely by failing to beat Italy, in other words completing what would have been a Grand Slam in the former Five Nations but not in the current championship . </P> <P> The 2017 Six Nations Championship will use bonus points on a trial basis . A team that wins the Grand Slam will get three bonus points . This will eliminate the possibility of a Grand Slam winner losing the championship on bonus points . </P> <Table> <Tr> <Th> Nation </Th> <Th> Grand Slams </Th> <Th> Grand Slam winning seasons </Th> </Tr> <Tr> <Td> England </Td> <Td> 13 </Td> <Td> 1913, 1914, 1921, 1923, 1924, 1928, 1957, 1980, 1991, 1992, 1995, 2003, 2016 </Td> </Tr> <Tr> <Td> Wales </Td> <Td> 11 </Td> <Td> 1908 *, 1909 *, 1911, 1950, 1952, 1971, 1976, 1978, 2005, 2008, 2012 </Td> </Tr> <Tr> <Td> France </Td> <Td> 9 </Td> <Td> 1968, 1977, 1981, 1987, 1997, 1998, 2002, 2004, 2010 </Td> </Tr> <Tr> <Td> Ireland </Td> <Td> </Td> <Td> 1948, 2009, 2018 </Td> </Tr> <Tr> <Td> Scotland </Td> <Td> </Td> <Td> 1925, 1984, 1990 </Td> </Tr> <Tr> <Td> Italy </Td> <Td> 0 </Td> <Td> </Td> </Tr> </Table> <Tr> <Th> Nation </Th> <Th> Grand Slams </Th> <Th> Grand Slam winning seasons </Th> </Tr>

How many 6 nations grand slams have wales won