2015 6.4

2014 6.7

2011 7.2

2015 5.6

2010 6.2

2017 6.2

2017 6.5

2017 8.1

2017 7.6

2017 7.7

2017 5.3

2005 7.8

2017 7.2

2012 7.3

2012 6.9

2016 7.3

2017 7.4

2004 7.5

2017 7.2

2017 5.4

2013 7.3

2004 7.6

2016 6.8

2017 6.6

2017 7.4

2017 5.7

2010 6.3

2013 6.5

2009 6.2

2015 5.4