2011

5.2

1985

5.9

2010

6.3

2006

5.1

2020

7.2

1997

5.4

2017

6.7

2003

5.8

2016

6.5

2014

5.6

2015

6.7

2013

8.5

2005

6.0

2017

7.3

2013

8.4

2018

5.3

2018

5.9

2012

4.9

2007

7.5

2020

6.2