1984

7.8

1972

7.3

1989

6.1

1987

6.2

1977

6.2

1971

4.9

1963

7.9

1983

8.5

1968

6.7

1975

6.2

1984

6.4

1984

8.0

1974

7.2

1979

5.3

1986

7.3

1998

4.0

1981

8.0

1993

6.1

1977

7.5

1982

7.6

1973

7.6

1972

5.3

1982

5.2

1991

6.6

1975

5.0

1962

7.3

1975

7.8

1975

0.0

1997

6.8

1994

6.0

1980

8.3

1990

7.4