2011

8.5

2007

8.5

1999

7.4

1986

8.3

2008

8.9

2002

8.6

2012

8.6

2014

7.8

2009

7.7

2013

8.1

2004

7.9

1996

8.5

2012

7.6

2011

7.4

2006

8.6

2009

7.5

2002

7.5

2005

8.2

2014

8.3

2011

8.5