Year	Percent
2005	12.8587
2006	9.9115
2007	8.0681
2008	8.8114
2009	9.9183
2010	12.0062
2011	13.7587
2012	12.573
2013	11.1078
2014	13.1569
2015	14.0454
2016	13.0793
2017	12.1104