1961

6.0

1975

3.7

1967

4.0

1988

3.9

1989

3.0

1979

6.8

1981

5.6

1980

0.0

1955

6.5

1959

5.7

1966

2.7

1959

6.0

1965

7.1

1986

0.0

1986

7.2

1985

6.6

1977

1.0

1988

7.6

1987

4.9

1976

6.0

1958

6.1

1968

2.0

1981

5.0

1984

6.9