Year	Percent
1994	9.38
1995	6
1996	12.36
1997	6.41
1998	11.9
2000	16.49
2001	8.81
2002	12.73
2004	8.79
2007	2.78
2008	1.63
2009	1.28
2010	2.66
2012	3.66
2013	4.11
2014	6.41
2015	2.72
2016	2.46
2017	1.87