2002

7.6

2005

6.9

2000

7.6

2000

6.3

2004

7.4

1930

7.7

1984

6.6

1997

7.7

1994

6.2

2001

7.4

1988

7.5

1989

8.3

2001

5.4

1986

7.9

1994

6.8

2002

6.7

1995

6.5

1998

6.7

2005

6.3

2006

6.9