Year	Percent
1996	5.08
1997	7.47
1998	6.22
1999	6.21
2000	4.8
2001	5.25
2002	4.23
2003	4.18
2004	4.62
2005	2.1
2006	1.58
2007	1.81
2008	1.17
2009	1.4
2010	1.42
2011	1.1
2012	0.75
2013	0.63
2014	0.57
2015	0.62
2016	0.66
2017	0.42