1963

8.1

1995

7.2

2006

5.9

1995

8.0

2008

8.5

1972

7.1

1986

7.7

1957

7.8

1986

7.1

2003

8.3

1995

7.9

1975

7.8

1965

7.6

1968

7.1

2024

10.0

2007

7.0

2001

6.8

2001

6.9

1991

8.3

1999

7.7