1992

0.0

1989

8.1

1978

7.7

2000

5.0

1980

7.0

1978

7.8

1981

3.9

1984

6.4

1985

5.7

1994

5.4

1996

8.0

1983

6.0

1993

6.9

1991

6.4

1979

6.7

1987

0.0

1988

7.0

1977

7.4

1984

6.0

1994

6.0

1989

0.0