1991

6.8

2010

5.7

1893

5.6

1995

6.2

2007

0.0

2007

7.0

2010

7.3

1984

6.9

2011

0.0

2001

7.1

2011

6.0

2014

4.3

2007

5.9

2002

2.9

1912

5.2

2004

7.2

1918

6.0

2009

7.0

2014

5.4

2012

6.0