2017 24.8279452054795
2016 24.9161202185792
2015 24.9090410958904
2014 24.6657534246575
2013 24.4408219178082
2012 24.3992753623188
2011 24.1915068493151
2010 24.6849315068493
2009 24.2906849315068
2008 23.9918032786885
2007 24.318904109589
2006 24.301095890411
2005 24.1019178082192
2004 23.9666666666667
2003 24.3734246575342
2002 24.652602739726
2001 24.178904109589