2012

6.0

2008

7.0

2004

7.1

1992

6.2

1995

5.9

2020

6.9

2013

6.4

2009

4.8

2014

7.2

2012

6.4

2011

7.1

2012

4.5

1988

6.5

2013

6.9

2009

7.3

2005

6.8

2012

6.2

2006

6.2

2004

6.6

2005

5.1