2011 6.9

1992 8.0

2020 6.4

2018 6.2

2005 5.7

1993 7.9

1992 6.4

2008 8.0

2017 6.9

2021 7.1

2018 8.2

1998 7.2

2017 6.5

2003 7.8

2018 7.9

2015 7.1

1988 8.1

2019 7.3

2013 7.1

1976 8.1