2003

6.4

2004

6.3

2000

6.6

2003

6.3

1957

7.1

1984

6.9

1994

6.0

1987

6.2

2002

6.2

1986

6.7

2006

4.1

1981

6.6

2002

6.9

1995

6.0

1987

6.7

1994

5.3

1989

7.8

1931

7.1

1895

6.8