2004

8.6

2015

7.4

2012

6.6

2004

8.3

2014

8.1

2006

6.8

1998

7.2

2019

6.8

2017

7.2

2005

6.8

2012

8.4

2010

7.7

2013

6.9

2010

8.4

2011

8.3

2007

7.8

2014

7.5

1973

7.1

2004

7.8

7.0