2005

7.2

2009

4.5

2000

6.3

2000

5.0

2001

0.0

1996

0.0

1982

5.1

1997

6.5

1994

3.0

2010

5.6

2002

6.9

2009

0.0

2004

8.9

1998

7.3

2003

0.0

2008

7.2