1989

6.8

1979

5.2

2005

3.6

1986

6.9

1994

2.0

1988

5.0

1983

0.0

1990

4.6

1987

4.9

1984

0.0

1994

0.0

2002

7.3

1994

6.5

1998

6.4

1988

6.3

2001

3.0

2006

6.3

1986

8.0

2001

9.0

1985

6.0

2006

6.0