1996

6.4

1986

0.0

1985

6.2

1992

9.5

1981

4.2

1986

0.0

1983

6.5

1990

3.0

1990

0.0

1986

8.0

1987

6.7

1989

2.0

1988

0.0

1986

10.0

1986

3.0

1984

0.0

1984

8.0