1971

5.8

1978

6.3

2005

6.0

2014

6.6

2009

8.5

2020

6.0

0.0

2013

6.0

2017

8.0

2012

7.5

1967

5.0

1988

7.0

2023

5.0

1936

6.5

2010

6.8

1979

3.5

1998

7.0