1987

8.4

2024

7.8

2005

8.0

2021

8.2

1998

7.9

2000

8.1

2008

7.7

2007

7.9

2014

8.4

1990

7.4

2012

7.3

1995

7.8

2004

8.2

2023

8.1

2003

7.6

2018

7.0

2022

8.1

2023

8.5

2011

6.8

1997

6.4