1988

6.7

1987

6.8

1948

9.0

1999

3.0

1991

6.0

1977

6.3

2000

7.0

2002

6.4

1990

2.0

2002

6.5

1966

3.5

1994

7.5

2006

1.0

1995

0.0

1982

4.0

1987

6.5

1997

0.0

1998

7.5

2001

4.2

1978

5.5

1959

5.3

1983

0.0

2004

0.0

2002

6.4

1984

0.0