Year	Percent
2003-01-01	10.1265822784810
2004-01-01	11.8421052631579
2005-01-01	11.9047619047619
2006-01-01	17.2839506172840
2007-01-01	13.2442557442557
2008-01-01	13.2258546380645
2009-01-01	17.6321945188768
2010-01-01	17.6461207113227
2011-01-01	13.4382250423560
2012-01-01	18.7985697822919
2013-01-01	19.7595788247851
2014-01-01	26.2651472349206
2015-01-01	18.6840335431388
2016-01-01	19.7640042658673
2017-01-01	17.3694621837285