Year	Percent
1995	12.99
1996	12.29
1997	11.16
1998	9.38
1999	9.64
2000	8.26
2001	5.76
2002	4.63
2003	3.4
2004	2.205
2005	2.21
2006	2.215
2007	1.871
2008	1.966
2009	1.99
2010	2.71
2011	3.51
2013	3.55
2014	3.1
2015	2.6