1980

8.2

1999

8.0

2005

6.3

1963

8.1

1958

8.2

1957

7.2

2006

6.6

2002

7.3

1971

6.4

1960

8.4

1997

7.0

2003

7.2

2008

7.6

2001

6.1

2001

5.9

2006

6.8

2021

0.0

2002

6.8

2003

7.1

2024

5.5