1998

8.1

1963

7.4

2004

7.4

2011

0.0

2014

6.7

2007

7.1

2007

8.1

2017

6.6

2010

6.3

2008

7.2

1997

7.5

2010

7.8

2003

7.6

2008

6.2

2006

7.2

2009

7.7

2000

6.2

2014

5.3

2004

7.2

2008

7.5