2003 7.9

2017 6.8

2016 5.8

2005 5.0

2009 7.3

2012 7.6

2017 6.4

2004 7.6

2015 6.6

2017 7.2

2017 7.6

2018 6.7

2010 5.7

2017 6.0

2016 7.2

2012 6.6

2016 6.1

2006 6.8

2018 6.8

2016 6.7

2011 6.5

2012 7.2

2001 7.1

2018 6.6

2017 5.8

2008 4.4

2017 7.3

2017 6.3

2018 4.8

1999 7.0