1981

5.2

2006

5.0

1996

6.4

2003

4.5

2009

7.0

2004

6.2

1991

4.8

1984

6.9

2008

5.6

1987

0.0

1989

6.3

2005

3.3

2007

3.5

2014

0.0

1995

0.0

2010

4.3

2002

6.4

2012

6.0

1986

0.0

2010

6.0

1981

0.0

2002

6.5

2010

4.3

2002

0.0

1987

0.0

1995

0.0

2002

7.5

2003

0.0

2002

8.0

1989

6.0

1971

6.4

1970

6.1

2000

5.0

2001

4.2

1978

5.5

1997

1.0

1998

4.5

2002

6.4

2005

4.5

1999

4.4

1984

0.0

1994

10.0

1993

0.0

1999

0.0