2004

3.4

2016

7.3

2017

6.5

2008

8.1

2009

6.9

2006

6.1

2010

7.7

2012

6.4

2013

6.3

2009

6.3

2006

6.8

2001

8.2

1997

8.3

2005

8.3

2022

7.6

2011

6.3

2005

5.8

2007

7.0

2014

5.9