2013

8.6

2006

5.4

2009

8.3

2016

7.1

2016

8.0

2020

7.9

2011

7.3

2017

8.3

2017

3.9

2014

7.9

1978

6.8

2005

8.1

2003

7.6

2015

7.2

1989

8.0

2015

7.6

2018

8.5

2011

7.5

2005

8.5

2009

8.0