1977

6.8

2002

5.0

2005

6.1

2018

5.4

1984

7.2

1965

6.6

1968

8.4

1980

5.5

2007

4.5

1971

7.5

1940

6.9

1982

7.6

1970

4.9

2009

7.8

1945

7.0

2024

7.2

1959

7.1

1978

7.4

1984

6.3

1990

6.4