2009

8.3

2007

8.5

2013

7.6

2005

8.1

1973

8.0

2014

7.8

2015

7.2

1989

8.2

2017

7.5

2011

7.4

2009

7.0

2013

8.1

2011

7.1

2010

7.2

2021

8.0

2014

8.3

2005

8.1

2015

7.8

2018

8.4

2005

7.1