Year | Value | 2022 | 5.504 | 2021 | 7.702 | 2020 | 6.126 | 2019 | 6.356 | 2018 | 5.861 | 2017 | 5.832 | 2016 | 7.284 | 2015 | 7.605 | 2014 | 6.719 | 2013 | 7.352 | 2012 | 6.722 | 2011 | 6.087 | 2010 | 5.212 | 2009 | 5.467 | 2008 | 4.764 | 2007 | 5.158 | 2006 | 5.655 | 2005 | 6.587 | 2004 | 6.303 | 2003 | 6.938 | 2002 | 13.79 | 2001 | 7.262 | 2000 | 6.432 |
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