Year	Percent
2000-01-01	52.5927607344547
2001-01-01	52.8033509741519
2002-01-01	52.7945747618563
2003-01-01	53.0922502789744
2004-01-01	53.2862719184250
2005-01-01	53.3686834083142
2006-01-01	53.4544993843022
2007-01-01	53.5935475242043
2008-01-01	53.4622929167711
2009-01-01	51.6082046557400
2010-01-01	51.3053803057337
2011-01-01	51.1427898405697
2012-01-01	51.4015399813017
2013-01-01	51.5055517272923
2014-01-01	52.2862025219751