2012

6.6

2002

7.1

2007

6.4

2014

5.0

2004

5.3

2012

5.5

2010

6.4

2013

5.9

2005

6.7

2017

5.7

2006

6.7

2009

3.9

1996

5.6

1890

4.9

2008

6.9

2006

4.0

2010

5.2

2016

6.3

2015

5.7

2011

5.9