Year	Percent
2005-01-01	4.00964684937628
2006-01-01	3.99311678539069
2007-01-01	4.13404493265044
2008-01-01	4.19216043779898
2009-01-01	5.53063974017407
2010-01-01	5.37188523146559
2011-01-01	5.32508063687920
2012-01-01	5.07923129278500
2013-01-01	5.14866216624065
2014-01-01	5.02946991198423
2015-01-01	4.63366395595044
2016-01-01	4.08938261927986
2017-01-01	3.74912572121081