1940

6.1

1939

5.5

1950

4.8

1943

4.7

1938

5.8

1964

6.6

1939

5.2

1945

6.1

1950

4.4

1936

6.3

1939

5.6

1942

5.8

1967

4.8

1949

5.2

1918

6.6

1940

5.0

1931

3.2

1932

5.2

1941

6.0

1914

5.7