1984

6.6

1981

0.0

1980

7.5

1990

6.1

1992

5.0

1989

0.0

1989

7.1

1994

0.0

1991

6.1

1999

4.3

1977

7.0

1993

6.0

1979

2.0

1977

5.6

1977

0.0

1988

5.7

1995

7.2

1978

6.7

1996

4.0

1987

6.1

1979

0.0