2010

6.5

2008

5.6

2004

7.1

2013

6.1

2005

5.8

1968

6.4

2012

6.2

2016

6.4

2005

5.7

2014

5.7

1989

6.0

2021

7.8

2024

5.8

2013

5.7

2020

6.2

1986

5.8

2016

7.3

2017

6.2

2017

6.3

2014

6.9