Year	Percent
2000-01-01	54.8879477833299
2001-01-01	53.1455611027649
2002-01-01	50.8920389776550
2003-01-01	50.3914104618950
2004-01-01	51.0014230202661
2005-01-01	52.4045928580251
2006-01-01	44.7639841704812
2007-01-01	46.8818959079710
2008-01-01	48.8908132925637
2009-01-01	48.8595394729245
2010-01-01	48.3709921205037
2011-01-01	48.8218229653625
2012-01-01	48.8331717746082
2013-01-01	48.8149957763226