2008

4.9

2023

5.9

1998

5.3

2012

6.2

2001

3.0

2006

6.7

2013

6.2

2007

6.8

2015

5.9

2005

6.9

2009

6.5

2009

6.3

1997

7.0

2018

5.5

2016

6.0

2009

6.6