1954

7.1

1955

7.8

1958

7.0

1965

6.2

1951

5.1

1945

4.8

1936

5.2

1943

5.0

1937

4.8

1968

7.2

1953

7.3

1946

4.9

1953

6.8

1944

2.7

1941

6.1

1958

6.2

1947

7.7

1963

6.6

1961

7.3

1940

7.3

1948

6.8

1964

6.7

1964

6.5

1963

6.7

1954

6.9

1957

5.0

1959

6.0

1945

6.2

1958

7.2

1940

7.3

1946

6.4

1962

6.7

1937

4.0

1945

4.5

1956

6.3

1958

6.0

1961

5.7