1962

7.2

1973

5.7

1972

4.0

1957

6.7

1960

6.7

1974

5.3

1955

6.6

1968

7.1

1965

6.3

1967

6.7

1969

6.0

1971

7.1

1972

4.0

1966

7.6

1971

0.0

1970

7.5

1972

6.6

1958

5.8

1959

0.0

1961

6.2

1961

6.2

1974

7.5

1972

6.9

1965

7.5