1949

6.3

1971

5.0

1949

4.5

1946

7.5

1973

6.4

1977

7.0

1947

6.8

1976

6.9

1945

5.3

1968

6.5

1967

4.4

1974

3.9

1951

7.1

1966

5.3

1952

6.4

1974

6.6

1972

5.0

1976

7.0

1977

6.4

1953

5.0

1948

5.7

1970

7.2