1966

7.3

1983

5.8

1993

7.4

2008

6.6

2007

6.4

2004

7.8

2005

5.4

2003

5.8

2006

8.2

2004

7.2

2019

8.1

1945

7.7

2005

7.0

1932

7.4

1976

7.6

2000

7.0

2005

6.5

1968

7.1

1995

8.4

1987

7.3