Year	Percent
2000	1.09
2001	0.99
2002	0.63
2003	0.48
2004	0.42
2005	0.36
2006	0.35
2007	0.29
2008	0.41
2009	0.4
2010	0.56
2011	0.47
2012	0.38
2013	0.37
2014	0.35
2015	0.37
2016	0.3
2017	0.36