Year | Value | 2022 | 5.956 | 2021 | 7.112 | 2020 | 8.487 | 2019 | 6.255 | 2018 | 6.147 | 2017 | 7.073 | 2016 | 7.862 | 2015 | 9.12 | 2014 | 10.698 | 2013 | 11.77 | 2012 | 13.365 | 2011 | 15.39 | 2010 | 17.814 | 2009 | 13.785 | 2008 | 5.826 | 2007 | 4.25 | 2006 | 5.78 | 2005 | 8.325 | 2004 | 10.684 | 2003 | 12.875 | 2002 | 13.008 | 2001 | 16.84 | 2000 | 15.931 | 1999 | 13.388 | 1998 | 13.711 | 1997 | 14.13 | 1996 | 16.4 | 1995 | 17.54 | 1994 | 17.33 |
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