2013

6.4

2000

6.3

2014

7.0

2013

7.5

2020

7.2

2017

4.9

2012

5.0

2009

6.1

2005

6.8

2016

4.9

2012

8.1

2011

6.7

2003

7.5

2010

6.8

2006

5.9