1939

7.5

1994

7.0

1988

7.4

1937

5.8

1937

5.7

1978

5.7

1991

5.6

2003

6.1

1995

7.3

1987

6.8

1985

7.5

1968

0.0

1985

6.7

2005

6.0

2007

6.5

2024

10.0

2008

6.7

1984

6.6

1970

0.0

2008

5.3