Year	Percent
2000-01-01	7.19862857408676
2001-01-01	6.37085948805088
2002-01-01	5.42073670438169
2003-01-01	5.09117664646871
2004-01-01	5.01601823131998
2005-01-01	3.98611537674079
2006-01-01	3.04393155422834
2007-01-01	2.36535778090850
2008-01-01	2.83821733220451
2009-01-01	6.99193049950208
2010-01-01	8.57364075711904
2011-01-01	6.39354150952811
2012-01-01	5.18841017844853
2013-01-01	4.45970762590322