2001

6.8

2005

6.2

1946

3.0

2002

6.0

2007

7.1

2008

6.2

2008

6.7

2006

6.7

2006

5.8

2006

6.0

1972

6.5

2005

6.0

1988

6.1

2006

6.6

2005

5.7

2006

7.1

1991

6.7

1989

6.1

1992

6.0

2002

6.3