1990

6.5

1992

7.3

1995

7.0

2009

6.0

1923

5.0

1981

4.0

1926

6.1

1988

6.2

1939

6.0

1944

6.6

1945

6.5

1963

7.0

1960

6.8

1958

6.9

1942

6.6

2004

5.9

2014

7.3

1926

6.0

1920

0.0

1913

1.0