1997

4.0

2006

2.3

2005

0.0

2016

4.6

2007

4.2

2004

6.5

1997

5.3

2009

6.0

2008

5.6

2018

6.2

2018

1.3

2014

6.8

2014

5.4

2013

7.4

2013

2.3

2004

5.0

2015

7.2

2007

6.7

2009

6.7

2009

5.0