Year	Percent
1996	4.13
1997	4.08
1998	2.95
1999	2.82
2000	2.17
2001	2.41
2002	2.48
2003	2.03
2004	1.56
2005	1.1
2006	1.09
2007	1.19
2008	1.04
2009	1.12
2010	1.22
2011	1.16
2012	1.15
2013	0.9
2014	0.8
2015	1.17
2016	0.89
2017	1.06