Year	Percent
2000-01-01	42.7754700524095
2001-01-01	43.8469675000000
2002-01-01	44.4963850000000
2003-01-01	44.4398575000000
2004-01-01	44.3115300000000
2005-01-01	44.7037625000000
2006-01-01	45.5869875000000
2007-01-01	46.9797125000000
2008-01-01	47.9783125000000
2009-01-01	48.2581675000000
2010-01-01	46.6146325000000
2011-01-01	46.7743450000000
2012-01-01	46.8711350000000
2013-01-01	46.3565300000000