Year	Percent
1999-01-01	46.6735078317428
2000-01-01	47.0322165495554
2001-01-01	47.3391084804309
2002-01-01	46.9755632630237
2003-01-01	46.1626205833794
2004-01-01	46.8813104864778
2005-01-01	47.0702538444762
2006-01-01	47.9090473384287
2007-01-01	47.7685067881793
2008-01-01	48.2435380538064
2009-01-01	47.2905900353129
2010-01-01	46.1948421843347
2011-01-01	45.6581659044916
2012-01-01	45.3027138242742
2013-01-01	45.1943027413735
2014-01-01	45.1232843922280