1940

7.6

1960

7.5

2003

6.7

2006

7.4

2005

7.0

1987

6.7

2003

6.7

2000

6.7

1980

6.0

1943

7.8

2016

6.7

1982

6.6

1977

6.2

2008

6.8

2007

6.4

1940

7.4

2007

6.5

2005

6.2

2006

7.5

2024

7.0