2017 6.6

1995 8.0

2000 6.4

2017 5.4

2017 4.6

2016 6.2

1975 8.1

2016 7.4

1998 7.2

2001 7.6

2016 7.1

1990 7.5

2014 5.5

2004 7.5

2016 6.8

2013 6.3

2004 6.4

2012 7.9

2010 5.9

2019 6.5