1982

5.8

1993

6.1

2017

6.0

1956

7.1

1968

6.9

2001

6.9

2024

7.3

2004

5.7

1991

6.8

2020

7.0

2011

5.8

1965

7.5

5.8

2008

6.3

2009

5.0

2018

6.5

2002

7.8

2015

4.6

2006

6.7