1955

6.4

1948

6.1

1951

6.2

1956

6.7

1954

7.3

1945

5.5

1957

7.0

1937

6.0

1947

7.3

1939

5.2

1946

6.2

1931

5.0

1941

5.0

1941

4.0

1945

6.0

1954

6.5

1934

6.5

1958

6.6

1937

5.5

1938

5.8

1944

4.8

1950

5.7

1942

6.3