2003

8.3

1971

6.4

1977

6.8

2005

7.2

2000

8.2

1932

7.8

1986

7.6

2006

5.6

1995

8.4

2004

6.5

1999

7.0

2007

6.2

2006

6.0

2006

5.3

2008

6.6

1985

6.7

2004

4.8

2003

6.3

1995

6.5

2002

6.3