Year	Percent
2005-01-01	48.5460986783523
2006-01-01	50.0297221173401
2007-01-01	50.6092024187454
2008-01-01	50.7380842626379
2009-01-01	51.1925604108506
2010-01-01	50.9144242500740
2011-01-01	51.5975199128284
2012-01-01	52.9683663785114
2013-01-01	53.2364137684639
2014-01-01	52.3579709883118
2015-01-01	53.1499992025110
2016-01-01	53.6029352153625
2017-01-01	53.5279698312413