1983

6.2

1983

6.0

1961

6.0

1981

4.0

1977

6.8

1986

6.1

1980

3.7

1972

7.8

1964

6.1

1976

6.0

1967

6.3

1976

6.8

1977

4.5

1995

7.0

1977

6.4

1988

5.9

1980

5.7

1986

6.0

1991

2.8

1987

5.5

1985

6.1

1973

6.9

1974

6.2

1991

1.5

1993

5.8

1958

6.6

1979

5.0

1984

7.2

1977

6.0

1976

5.2

1975

2.0

1977

6.6

1974

5.7

1987

6.6

1965

4.6

1976

6.4

1995

8.2

1977

5.9

1959

2.4

1980

6.3

1979

5.7