2004

6.3

1987

7.5

2000

5.3

2006

7.2

1999

6.6

1995

7.0

1919

6.9

2005

7.6

1927

6.1

1984

7.2

2006

6.8

2005

5.6

2007

6.9

1996

7.3

2008

3.8

1989

7.8

1980

6.6

1982

6.5

2001

6.9

2001

5.4