2009

8.0

2012

5.3

2010

6.6

1998

6.5

2015

5.9

2011

5.2

2003

4.1

2000

4.0

2008

7.2

2011

6.6

2012

5.6

2016

4.6

2001

6.5

2010

6.2

2013

7.9

2005

6.7

2016

6.5

2013

4.1

2015

7.7