1971

6.5

1979

4.1

1970

6.1

1978

5.9

1952

6.4

1968

6.7

1973

6.0

1950

0.0

1950

0.0

1957

5.2

1964

4.0

1955

7.0

1957

7.7

1976

7.5

1977

6.2

1962

7.8

1961

7.4

1963

7.2

1974

0.0

1978

5.9

1974

7.2

1959

8.4

1970

7.2

1963

6.7