Year	Percent
2005	7.90869
2006	9.18407
2007	7.63265
2008	7.68395
2009	12.38667
2010	3.08509
2011	2.4665
2012	3.08369
2013	3.32656
2014	3.20163
2015	3.66988
2016	4.29704