6.8

2007

5.7

2011

5.6

2017

5.9

2012

7.2

5.3

2009

7.2

2023

7.9

2012

6.3

2004

9.9

2006

9.8

1985

6.9

1999

7.2

2015

6.6

2010

9.1

2018

7.3

2003

6.1

2012

6.4

2020

6.5

2024

7.2