1981

6.6

1978

7.1

1967

7.0

1972

0.0

1960

5.5

1961

5.0

1967

5.0

1979

6.8

1966

5.6

1984

8.1

1961

7.7

1962

4.0

1959

0.0

1975

5.5

1967

7.7

1962

7.3

1971

7.6