Year	Percent
2003-01-01	50.7067943456452
2004-01-01	50.2035278154681
2005-01-01	50.5159264244056
2006-01-01	47.9913606911447
2007-01-01	48.5169642298016
2008-01-01	49.6029194732446
2009-01-01	51.7523329085431
2010-01-01	51.5006078541560
2011-01-01	51.0535171954721
2012-01-01	51.5322390968355
2013-01-01	51.5382915182163