2017

8.0

1972

8.6

1968

7.0

1994

6.5

2007

8.2

2006

8.2

2004

8.1

2011

7.6

2004

8.6

2008

8.4

2011

8.1

2012

6.8

2002

8.1

2012

7.6

2012

8.0

2008

6.1

1988

5.5

2010

7.9

2000

7.6

2004

7.8