1982

6.0

1991

4.7

1988

0.0

1994

4.9

1990

6.2

1987

8.0

1992

0.0

1992

5.5

1983

5.7

1983

4.2

1975

0.0

1987

1.0

1984

6.0

1993

3.0

1995

0.0