Year	Percent
1996	2.3
1997	3.17
1998	3.13
1999	3.26
2000	2.93
2001	2.79
2002	2.54
2003	2.78
2004	3.46
2005	2.3
2006	1.78
2007	1.36
2008	1.39
2009	1.24
2010	1.09
2011	0.62
2012	0.6
2013	0.51
2014	0.65
2015	0.64
2016	0.32