2016

8.6

2011

8.1

2006

7.1

1998

8.2

2016

7.3

2012

6.6

2007

7.3

1999

7.7

1995

7.4

2016

7.3

1989

8.3

1996

7.5

2005

8.1

1997

7.7

2015

6.9

2017

6.4

2018

8.1

2016

7.8

2004

7.9

2006

8.1