1981

7.0

1988

3.0

1992

3.8

1978

7.2

2007

3.8

1990

3.1

1991

5.4

1987

0.0

1985

5.6

1980

7.3

1993

2.3

1992

5.8

1991

0.0

1993

7.0

1987

6.8

1986

0.0

1984

8.0

1989

6.0