Year	Percent
1993	52.15
1994	49.42
1995	49.63
1996	52.12
1997	59.08
1998	57.94
1999	59.01
2000	57.58
2002	56.1
2003	60.22
2004	59.39
2005	62.55
2006	59.6
2015	69.78
2016	73.61