Year	Percent
2005-01-01	8.89876995352385
2006-01-01	8.16647503521552
2007-01-01	7.12174238220349
2008-01-01	6.95885112095493
2009-01-01	8.87329819584090
2010-01-01	9.52819669615355
2011-01-01	9.60677447845404
2012-01-01	10.42540556720570
2013-01-01	10.82186429374950
2014-01-01	10.21119202966360
2015-01-01	9.39442797869606
2016-01-01	8.54020175756423
2017-01-01	7.62239889598837