Year	Percent
1995	5.45
1996	4.86
1997	4.73
1998	4.42
1999	4.29
2000	3.81
2001	3.13
2002	2.56
2003	1.71
2004	1.654
2005	1.8
2006	1.731
2007	1.737
2008	1.348
2009	1.47
2010	2.37
2011	2.97
2013	3.13
2014	2.4
2015	2.3