Year	Percent
2003-01-01	8.09956236433442
2004-01-01	8.46839774072680
2005-01-01	8.49385463434099
2006-01-01	8.44900744006694
2007-01-01	7.65857929240652
2008-01-01	7.06297190370826
2009-01-01	8.73597258317795
2010-01-01	8.87179141190182
2011-01-01	8.81104329793512
2012-01-01	9.39935122773561
2013-01-01	9.92132447495962
2014-01-01	10.29171117081520
2015-01-01	10.35980774797580
2016-01-01	10.05660848325480
2017-01-01	9.39860562147609