1991

7.7

2012

8.2

2016

7.5

2016

7.0

2018

7.9

2001

8.4

2017

6.6

2013

7.7

2015

7.9

2017

6.1

2005

7.6

2008

7.8

2004

7.5

2024

9.0

2004

8.0

2020

8.3

2016

8.6

2007

8.5

2006

8.2