Year	Percent
1994	22.15
1995	20.36
1996	19.34
1997	23.79
1998	25.98
1999	20.34
2000	20.79
2002	23.86
2003	28.05
2004	25
2005	22.9
2006	20.3
2007	18.5
2008	14.75
2009	16.46
2011	20.22
2012	21.19
2013	23.93
2015	27.4416
2016	23.4768