2013 6.3

2011 7.6

2015 6.2

2016 7.6

2012 7.0

2008 7.7

2017 6.6

2000 7.3

2008 6.8

1986 7.8

2019 6.6

2018 5.9

1995 6.7

1999 7.2

2015 7.1

2016 6.0

2019 7.3

2015 7.0

2014 7.6

2012 6.1