2017

8.4

2012

8.2

2016

7.3

2015

7.5

2007

8.5

2015

7.2

1975

8.3

2010

8.0

2007

7.2

2022

7.7

2008

8.9

2001

7.4

2013

6.7

2015

8.7

1998

7.9

2004

8.6

1997

7.3

2018

7.0

1999

7.3

2010

7.9