2009 8.1

1992 7.4

2013 5.9

2004 7.7

2012 7.3

2014 6.4

2013 7.3

2018 5.6

2017 8.0

2011 5.0

2018 6.3

2008 6.5

1985 7.7

2018 7.7

2018 6.9

2017 7.3

2017 5.6

1970 7.1

2018 7.6

2019 6.6