Year	Percent
2003-01-01	37.4658279584455
2004-01-01	37.4783261616673
2005-01-01	37.6397671186670
2006-01-01	37.7960756795924
2007-01-01	38.5004117738323
2008-01-01	38.9062372138843
2009-01-01	38.5765829935939
2010-01-01	38.4643787661063
2011-01-01	38.4001639103414
2012-01-01	38.3919365137951
2013-01-01	38.4291401156351