2015

6.0

2009

7.4

2012

7.7

2011

6.5

2014

7.8

2007

7.5

2008

7.4

2009

7.9

2003

5.4

2009

7.6

2017

9.5

2011

6.4

2006

5.3

2013

8.1

2016

5.5

2015

6.3

2018

7.0

5.1

2012

6.9

2013

6.7