1995

7.8

1990

8.3

2020

8.2

2022

8.4

1984

7.8

2005

8.2

2020

8.4

2024

7.6

2015

8.2

2004

8.0

2003

7.4

2016

8.0

2008

7.9

2018

8.2

2007

7.2

2001

8.1

1998

7.9

2009

7.7

2006

7.1

2011

7.6