1988 7.6

2004 6.1

2003 6.2

2016 5.5

2016 4.5

2003 6.8

2016 6.6

2016 7.6

2015 7.4

2008 3.9

2016 6.2

1994 6.3

2016 6.3

2015 5.7

2016 6.7

2016 7.4

1976 7.5

1971 7.5

2016 6.1

1994 5.7

2008 7.0

1963 7.0

1984 5.0

2007 6.7

1992 7.7

2004 5.8

2003 6.3

2016 4.2

2011 5.8

2004 6.6