1986

6.7

1985

7.5

1981

5.5

1989

6.8

1990

6.0

1974

8.0

1984

7.4

1981

7.6

1981

5.1

1986

7.2

1993

7.5

1987

5.4

1991

5.0

1976

0.0

1969

6.5

1984

6.2

1993

5.2

1991

7.8

1976

7.8

1972

7.5

1971

6.4

1981

6.7

1988

5.6

1979

5.0

1990

7.9

1983

6.1

1977

0.0

1975

7.3

1977

6.8

1988

6.0

1978

6.8

1988

0.0