2018

8.0

2017

8.1

2004

7.4

2007

7.1

2013

6.1

1985

7.0

2009

5.3

2016

7.6

2003

6.2

2018

7.8

2017

6.8

2015

6.5

2018

8.0

1971

6.4

1985

8.1

2018

6.8

2005

6.2

2007

7.9

2002

7.3

2016

7.2