2018 7.3

2014 8.1

1997 8.0

2013 7.5

2017 8.0

2019 8.3

2006 7.0

1997 8.4

1998 8.6

2009 7.9

1974 9.0

1995 8.6

2013 8.2

2011 8.1

2013 6.7

1994 8.5

2002 7.5

2014 7.4

2016 7.5

2004 7.9