1978

5.0

2016

5.6

2012

5.5

2007

6.7

2004

7.2

2016

6.8

2014

7.1

2012

5.0

2016

5.4

2015

6.0

1980

8.3

2018

5.6

2017

7.3

2017

5.2

2019

6.4

2013

7.0

2011

4.4

2015

5.2

2015

6.4

2008

6.5