1947

7.3

1983

7.8

2005

5.9

1939

7.1

2023

7.6

2006

6.8

1981

7.0

2018

7.0

1965

7.0

1968

6.2

1966

6.5

1976

7.0

2011

6.9

1968

7.4

2001

6.0

2010

5.9

1958

8.2

2006

6.5

1981

7.3

1924

7.4