2001

5.3

2002

7.6

1961

7.7

2006

8.2

1998

7.4

2007

4.3

2000

7.1

2001

7.1

2003

6.7

1998

6.8

1958

7.0

2007

6.4

2001

6.8

2005

6.2

2004

6.4

2006

5.4

2020

10.0

1986

0.0

2008

6.7

2007

5.0