Year	Percent
2005	11.21
2006	8.65
2007	11.42
2008	7.982
2009	11.8718
2010	13.2648
2011	16.1932
2012	18.6292
2013	17.2039
2014	13.6593
2015	12.3725
2016	9.7644
2017	9.0963