2003 7.0

2008 7.9

2017 7.5

2005 7.1

2009 6.2

2009 7.7

1997 7.5

1998 7.1

1996 6.7

2011 8.1

2007 7.4

2013 7.9

2008 7.0

2013 6.5

2016 5.6

2013 6.3

2018 7.5

2002 7.3

2015 6.3

2014 6.8