Year	Percent
2000-01-01	46.29138
2001-01-01	46.10074
2002-01-01	47.77409
2003-01-01	51.41634
2004-01-01	53.52045
2005-01-01	57.98392
2006-01-01	59.22265
2007-01-01	62.08912
2008-01-01	67.03536
2009-01-01	63.87194
2010-01-01	61.96254