2024

9.0

2015

8.7

1990

6.9

2000

6.8

2009

7.9

2008

6.7

2006

8.6

1999

7.5

2004

7.4

1997

8.3

2005

8.1

2000

6.6

2005

8.3

1988

8.0

1989

8.2

1990

7.6

2015

7.8

1978

8.2

2004

7.3

1994

8.4