Year	Percent
2000-01-01	57.7080882385712
2001-01-01	58.1476850000000
2002-01-01	57.9198950000000
2003-01-01	56.9214525000000
2004-01-01	56.3362775000000
2005-01-01	56.0946825000000
2006-01-01	56.8594450000000
2007-01-01	57.7286650000000
2008-01-01	58.2538100000000
2009-01-01	57.7978050000000
2010-01-01	55.8532325000000
2011-01-01	55.3583350000000
2012-01-01	55.2648825000000
2013-01-01	54.3467325000000