2008

6.0

2003

5.3

2007

6.3

2010

9.5

2005

7.2

1992

7.0

2003

5.5

2001

6.6

1974

6.9

1993

6.1

2002

7.6

2001

5.6

1984

6.7

2004

0.0

2009

8.8

2009

10.0

2010

10.0

2001

7.3