1984

8.5

2004

9.5

2015

8.0

1992

6.8

1972

7.7

1966

8.0

1960

7.4

1998

7.5

1989

8.3

1977

8.2

2007

7.7

1983

7.3

1995

6.5

2004

8.1

2017

5.7

2005

7.7

2003

7.8

1976

7.9

2011

5.9

1996

8.1