1977

5.2

1941

5.7

1973

5.0

1966

5.5

1967

6.2

1955

6.0

1968

0.0

1972

5.8

1965

7.0

1962

7.0

1959

5.6

1949

7.3

1962

7.8

1971

7.1

1953

6.3

1957

5.0

1967

6.8

1955

6.2

1973

6.2

1965

7.7