2008

6.7

2013

7.5

2015

6.8

2011

6.4

2012

7.8

1997

6.0

2009

6.1

2011

6.0

6.0

2021

1.0

2007

6.4

2009

6.0

2009

7.3

2014

5.3

2003

6.5

2015

7.3

2017

6.5

2013

6.7

2013

7.6