1970

7.0

1997

5.6

1972

6.8

1969

6.8

2005

7.0

2012

7.8

2006

6.9

1994

6.7

1945

7.2

1968

6.2

1953

6.8

1979

7.0

1948

6.6

1943

6.0

2006

4.4

1986

3.5

2017

6.8

2005

5.9

2000

7.2

2023

5.9