1973

7.0

1945

7.7

1994

6.3

1970

7.1

2002

6.0

1980

6.2

1990

6.9

1976

4.5

2002

6.7

2004

6.8

1993

5.0

2006

6.7

1956

6.2

2004

6.1

2017

6.3

1985

7.2

1924

3.5

1994

7.9

1932

7.8

1960

7.5