1931

8.3

1929

7.5

1946

7.6

1968

7.1

1995

7.9

1926

7.9

1925

8.0

1941

7.7

1971

7.4

1947

7.6

1991

6.8

2004

6.3

1989

2.0

1935

4.5

1919

6.0

1972

6.8

1987

6.5

2004

7.4

2014

6.4

1920

7.9