2011

8.1

2002

8.0

1984

7.1

2009

0.0

2009

7.7

2007

6.2

2012

5.5

1990

10.0

1978

0.0

2005

9.0

1994

0.0

2007

1.0

1994

8.2

2004

6.8

1994

6.8

2000

4.0

1971

7.6

1996

8.5

2006

8.1

1996

6.4