2005

6.0

2011

4.0

2006

6.3

2013

6.7

2008

5.0

2002

6.2

2003

6.2

2006

5.5

2017

6.8

1998

7.3

1984

4.0

2007

6.9

2006

7.6

2000

5.8

2004

5.6

2016

4.5

1995

6.4

1985

8.3

2007

6.5

1997

4.0