2003

8.0

2005

6.7

1979

8.3

2005

7.2

1984

7.3

1984

7.2

1998

6.8

1987

6.5

2000

8.2

1976

8.1

1983

8.2

2001

8.4

2002

8.4

2003

8.5

2001

7.8

1930

7.7

1982

6.7

1994

6.2

2004

7.7

2003

6.6