1999

7.4

2010

6.7

2019

7.4

2025

6.8

2003

7.9

1980

8.3

2019

8.1

2022

8.2

2007

8.1

2015

8.2

2005

7.0

2005

8.3

2015

7.5

2013

6.7

2005

7.5

2004

8.6

2009

7.1

2024

7.6

2014

8.3

2006

8.1