2007

8.5

1999

7.7

1995

7.8

2014

8.3

2017

7.3

2023

8.3

2022

6.2

2006

8.0

2024

6.1

2015

8.3

2012

8.5

2020

8.7

2017

8.2

2020

8.6

2021

7.9

1977

8.1

2004

4.4

2009

7.7

1997

7.1