2017 4.02657534246575
2016 3.99344262295082
2015 2.44547945205479
2014 2.73753424657534
2013 3.97260273972603
2012 3.75765027322404
2011 4.73506849315068
2010 4.06904109589041
2009 3.0241095890411
2008 3.13879781420765
2007 2.54931506849315
2006 2.96931506849315
2005 4.7758904109589
2004 4.43005464480874
2003 2.65260273972603
2002 2.54
2001 2.63287671232877