1997 5.7

2018 7.8

2017 6.4

2008 4.6

2016 5.9

1989 6.1

2001 7.1

2005 5.7

2017 5.5

2014 6.8

2015 7.2

2018 6.3

2007 6.3

2009 6.2

2003 7.6

2017 6.6

2012 5.6

2012 7.2

2000 5.8

2002 7.5

2003 5.8

2013 6.0

2017 6.7

2009 6.9

2010 7.5

2007 6.2

2016 7.7

2014 7.0

2016 5.7

2016 6.3