1984

0.0

1982

3.5

1995

0.0

1986

3.7

1998

6.0

1980

5.4

1968

0.0

1982

5.3

1987

6.0

1990

7.4

1989

7.2

1988

5.8

1999

8.7

0.0

1981

5.9