Year | Value | 2022 | 11.325 | 2021 | 15.139 | 2020 | 16.432 | 2019 | 10.807 | 2018 | 9.01 | 2017 | 7.729 | 2016 | 8.085 | 2015 | 8.415 | 2014 | 8.499 | 2013 | 8.218 | 2012 | 9.11 | 2011 | 9.518 | 2010 | 7.171 | 2009 | 7.824 | 2008 | 4.934 | 2007 | 4.557 | 2006 | 5.926 | 2005 | 6.749 | 2004 | 6.445 | 2003 | 6.654 | 2002 | 6.396 | 2001 | 6.051 |
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