Year	Percent
2000-01-01	42.0254510468584
2001-01-01	42.6032055601096
2002-01-01	42.8621737112672
2003-01-01	44.1342745159420
2004-01-01	44.4484937865607
2005-01-01	45.6485512308889
2006-01-01	48.4398738833449
2007-01-01	49.1442745570237
2008-01-01	49.1780697332105
2009-01-01	44.6175427412022
2010-01-01	42.7452317799030
2011-01-01	45.4799421016589
2012-01-01	46.5754859005485
2013-01-01	47.2246424531157