1988

6.7

1987

6.8

1948

9.0

1999

2.0

1991

6.0

1977

6.0

2000

7.0

2002

6.5

1990

2.0

2002

6.5

1984

3.5

1994

7.5

2006

1.0

1995

0.0

1982

4.0

1987

4.7

1997

0.0

1998

7.5

2001

4.4

1978

5.5

1959

5.3

1983

0.0

1984

7.2

2004

0.0

2002

6.4

1984

0.0