1961

6.2

1969

7.1

1965

6.7

1966

6.1

1950

6.0

1957

6.4

1965

6.2

1956

5.4

1974

6.2

1943

6.0

1957

7.0

1958

6.9

1950

6.8

1947

4.9

1953

6.7

1943

7.0

1954

6.5

1956

7.5

1992

7.4

1975

7.5

1946

6.2

1964

6.1

1938

5.8

1959

5.6

1972

6.2