Year	Percent
2005	8.34
2006	11.38
2007	8.61
2008	6.4753
2009	6.5795
2010	9.3471
2011	12.2489
2012	14.544
2013	11.9393
2014	10.1632
2015	9.9617
2016	7.7655
2017	6.5732