1983

6.0

1999

7.3

2009

2.0

1995

8.6

1988

5.0

1992

4.9

1980

0.0

1984

6.0

2003

6.2

1983

3.5

1993

0.0

1993

6.0

1991

7.0

2003

7.2

1996

4.3

1998

4.2

2004

7.4