1964

6.4

1957

6.6

1953

7.0

1960

4.3

1965

6.6

1960

6.0

1961

4.7

1949

6.2

1965

0.0

1971

6.6

1945

5.6

1966

6.2

1974

3.0

1965

5.8

1970

8.0

1974

7.2

1975

6.8

1961

5.2

1976

7.3

1952

7.5