1976

7.2

1932

6.5

1981

5.0

1929

3.9

1948

5.9

1936

6.8

1942

6.8

1936

6.2

1936

7.1

1935

6.9

1934

6.8

1938

6.4

1935

6.5

1939

6.2

1936

6.8

1939

6.6

1939

6.4

1935

6.6

1937

6.7

1938

6.2