1979

9.5

1984

1.0

1981

2.0

1984

9.0

1987

3.0

1976

7.1

1990

0.0

1992

10.0

2000

0.0

1986

4.5

1982

0.0

1994

7.0

1996

0.0

1976

6.8

1978

0.0