Year	Percent
2003-01-01	3.57388966758280
2004-01-01	3.06236279568277
2005-01-01	2.59351236856450
2006-01-01	2.60565940793873
2007-01-01	2.23936877636323
2008-01-01	3.26620387962701
2009-01-01	8.55409851680826
2010-01-01	8.31520687532223
2011-01-01	7.77756215550804
2012-01-01	6.29597663552328
2013-01-01	5.62855976108333
2014-01-01	5.00433571709067
2015-01-01	3.92609804383561
2016-01-01	2.93304033430300
2017-01-01	2.76151023949019