1992

6.0

1977

2.3

1968

5.9

1980

6.2

1973

4.0

1978

2.5

1975

4.3

1981

2.5

1989

6.4

1976

0.0

1974

5.8

1974

3.0

1977

2.0

1978

3.0

1976

3.0

1994

6.2

1973

0.0

1974

5.0

1978

5.2

1995

6.6

1972

7.0