1999

6.8

1931

4.0

2008

6.8

1936

6.8

1957

6.8

1999

5.8

1947

6.2

1967

8.2

2005

5.8

2017

6.2

1946

5.3

2010

6.5

1980

6.4

1959

4.3

2009

6.2

2011

6.2

1920

5.8

2012

6.6

1974

5.5

2001

6.0