1960

6.0

1982

5.9

1981

6.7

1972

8.0

1979

6.0

1951

0.0

1971

6.3

1980

4.0

1974

7.7

1985

8.0

1975

6.9

1968

6.6

1948

6.6

1962

5.6

1961

5.1

1951

0.0

1962

7.5

1945

6.2

1957

6.5