Year	Percent
2002	47.74003
2003	46.46067
2004	46.27949
2005	43.91232
2006	49.34726
2007	56.89143
2008	57.84462
2009	55.19766
2010	55.54648
2011	59.84172
2012	58.41508
2013	60.0712
2014	59.53715
2015	53.60716
2016	51.1652