2013

6.9

2003

5.7

2008

8.5

2014

7.7

2013

6.9

2014

7.0

2015

6.1

2010

6.7

2011

5.8

2014

6.1

2010

6.6

2014

7.5

2006

7.8

2012

6.0

2005

5.1

2017

6.8

2013

6.7

2014

6.5

2015

7.1

2001

7.6