1957

8.4

1965

6.0

1959

7.3

1963

6.3

1968

6.8

1948

6.8

1964

4.5

1950

7.8

1962

8.0

1961

5.4

1962

5.0

1956

5.6

1962

7.5

1956

5.5

1950

6.0