2005

7.8

1995

6.4

2000

6.1

2006

5.8

2006

5.1

1997

6.5

2003

6.6

1996

3.3

2006

5.8

1983

7.1

2002

5.5

1998

7.1

1998

6.8

2006

5.0

2001

6.3

2008

3.0

2009

7.1

2021

2.5

2009

7.0

2005

4.2