1949

6.3

1971

5.0

1949

4.0

1946

7.5

1973

6.3

1977

6.9

1947

6.8

1976

6.9

1945

5.3

1968

7.0

1967

4.4

1974

3.9

1951

7.1

1966

5.2

1952

6.4

1974

6.6

1972

5.0

1976

6.8

1977

6.2

1953

4.8

1948

5.6

1970

7.2