2006

5.5

2007

6.7

2005

6.9

2003

6.1

2010

6.3

1895

5.6

2009

7.4

2008

7.0

2009

7.3

2004

8.0

2012

6.3

2007

6.5

2013

7.2

1977

6.6

2013

5.9

2009

6.0

1921

7.7

2012

6.0

2004

6.6

2015

4.6