8.0

2005

7.1

2014

6.8

2022

6.9

2018

7.5

2013

8.1

2017

6.1

2019

7.8

2016

6.9

2015

6.5

2017

7.0

2006

6.9

2015

6.4

2004

8.1

1977

6.3

2025

8.6

1984

7.0

2016

6.9

2009

7.6

2004

7.2