2010

4.2

2012

7.0

2005

7.8

2018

6.6

2017

6.8

2011

7.0

2006

6.6

1984

7.3

2002

6.6

2011

6.1

2011

6.4

2008

6.7

2015

5.3

2018

6.7

2010

7.7

2016

6.2

2001

4.3

2014

7.1

2007

7.3

2017

7.0