1994

6.2

1998

6.0

2011

6.6

2019

6.5

2015

6.3

2022

6.5

2011

7.3

2017

8.6

2004

7.3

2009

7.4

2014

7.0

2003

6.8

2006

6.1

1999

5.9

2025

7.9

2003

7.2

1988

6.4

2012

5.6

2008

6.5

1980

5.9