1999

6.8

1992

7.7

2001

7.5

2004

7.2

1993

6.7

2005

6.9

1997

7.9

1931

8.3

1989

7.8

1925

8.0

2002

7.2

2001

7.8

1994

7.0

2005

6.0

2006

7.1

2006

7.3

2007

0.0

2003

7.2

2006

7.3

2002

7.1