Year	Percent
1995	61.71
1996	61.65
1997	54.14
1998	63.31
1999	63.31
2000	50.13
2001	50.13
2002	46.86
2003	46.87
2004	52.8
2005	52.8
2006	57.05
2007	60.39
2008	63.15
2009	63.32
2010	64.49
2011	61.67
2013	59.11
2014	53.37
2015	53.12
2016	54.69