2004

5.6

2018

9.5

2010

6.3

2009

5.6

2013

7.2

1988

6.0

2017

6.3

2010

6.3

1960

7.8

2011

6.4

2008

7.8

2004

5.1

2016

7.3

2011

7.0

2009

5.5

1987

7.5

2012

6.2

1996

6.7