2015

7.3

2012

6.8

2012

8.4

2005

8.5

2002

7.5

2015

7.5

2013

8.1

2017

6.5

1970

6.1

2011

8.1

2011

7.2

2005

8.2

2014

7.0

2010

7.8

2015

7.6

2016

7.3

2014

7.9

2015

7.6

2015

7.4

2018

7.2