8.0
2009
7.7
1991
7.8
1993
7.6
2002
7.4
1999
6.8
2007
7.2
1961
7.1
1940
6.9
1959
7.0
1941
5.6
2005
7.3
1973
2003
2018
1978
6.5
2008
1989
2000
2013