1954

7.1

1974

5.7

1958

7.0

1962

6.4

1956

5.5

1965

7.8

1979

6.0

1969

6.1

1972

0.0

1984

7.3

1957

6.0

1966

6.3

1964

8.0

1962

6.9

1961

5.5

1974

6.0

1979

5.5

1960

6.0