1955

2.4

2004

5.8

2005

5.2

1995

6.2

1893

5.5

1971

4.5

2010

6.8

2010

7.2

1904

5.5

2004

7.1

2010

5.7

1918

6.0

2000

5.3

1912

5.2

2013

4.4

2009

6.2

1991

6.8

2009

5.6

2009

6.7

1946

7.3