2014

10.0

2016

8.6

1999

7.5

2007

8.1

2011

8.5

2013

7.5

2012

6.4

2008

8.9

2010

8.1

1990

8.3

2015

7.6

2017

8.4

2018

7.7

2006

8.2

2013

8.2

2005

8.1

2011

7.6

2013

7.7

2013

6.9

2001

7.8