1972

7.5

1963

8.3

1994

7.9

2014

6.4

1974

7.0

1995

6.9

2013

6.8

1981

7.8

2012

7.9

1991

7.1

1973

7.7

1990

6.1

2012

7.8

2023

6.5

1960

8.4

1936

7.4

2007

5.5

2014

7.7

2013

7.3

1973

7.5