1975

9.0

1977

7.0

1984

6.5

1997

6.6

1981

6.2

2016

7.4

1983

0.0

1976

5.9

1977

0.0

2000

7.2

1983

8.9

1991

7.3

2004

8.1

1995

8.4

1978

7.0

1971

3.5

1980

0.0

1986

7.0

1991

7.4

1990

7.5

1982

6.0

1977

7.8