Year	Percent
2000	1.98
2001	2.35
2002	1.87
2003	1.38
2004	1.28
2005	1
2006	1.12
2007	0.68
2008	1.44
2009	1.45
2010	1.24
2011	1.13
2012	1.03
2013	0.98
2014	0.82
2015	0.82
2016	0.73
2017	0.74