1998

6.6

1983

6.8

1990

6.6

2006

4.1

2011

4.0

1990

6.0

1989

0.0

2011

0.0

2010

4.7

2006

4.0

2008

6.3

2008

2.0

2007

4.4

1986

0.0

1985

0.0

1985

0.0

1984

8.0

1984

0.0

1983

0.0

1980

0.0