2005

8.3

2017

8.2

2021

7.9

2017

8.4

2013

8.7

2011

8.5

2009

8.0

2016

8.5

2004

8.6

2012

7.5

2014

7.8

2015

8.1

2017

8.5

2016

8.6

1994

8.4

2011

7.4

2007

7.9

1999

7.4

2016

8.2

2015

8.2