Year	Percent
2005-01-01	29.1082760173550
2006-01-01	28.2289673491267
2007-01-01	27.9753146973807
2008-01-01	27.9120888573673
2009-01-01	27.3981978892108
2010-01-01	27.6591383823821
2011-01-01	27.2171521795940
2012-01-01	26.3863738057476
2013-01-01	26.2706845950501
2014-01-01	26.8943970177137
2015-01-01	26.4657482862349
2016-01-01	26.3179481491667
2017-01-01	26.4983792895669