2013

4.0

2010

7.0

2010

6.3

2011

5.2

2016

4.3

2015

6.9

2012

6.0

2016

6.9

2008

5.6

2014

5.5

2009

6.8

2017

6.4

1974

7.0

2010

7.2

1978

7.4

2014

5.8

2007

5.4

2006

6.8

2008

7.6

2014

5.1