2006

6.9

2003

7.1

2007

5.9

2001

5.6

2007

7.7

2008

6.4

1965

6.3

2004

4.2

2004

7.3

2006

5.6

2004

6.1

2005

6.2

1988

7.1

2005

7.7

2007

6.7

2005

4.0

1999

6.1

2003

0.0

1995

6.7

2006

4.3