1991

6.8

2010

6.8

1971

4.5

2013

4.4

1912

5.2

1996

0.0

2007

0.0

1893

5.6

1913

0.0

1995

6.2

2004

7.2

2014

5.4

2001

7.1

1984

6.9

2011

6.0

2014

4.3

2013

5.0

2006

7.5

1915

10.0

1958

6.3