Year	Percent
2000	3.15
2001	3.3
2002	3.2
2003	3.49
2004	3.35
2005	2.77
2006	2.18
2007	1.71
2008	1.87
2009	2.36
2010	2.07
2011	1.88
2012	1.77
2013	1.64
2014	1.85
2015	1.31
2016	1.26
2017	0.83