1991

8.1

1995

7.0

2006

5.5

1990

7.5

2004

7.9

2005

6.3

2001

7.4

2007

6.2

1994

8.5

1999

6.8

1994

5.7

1997

6.8

1997

6.9

2008

6.9

2024

10.0

2014

4.3

1998

6.8

2004

5.7

2000

6.0

1992

8.1