Year	Percent
2000	8.46
2001	8.05
2002	7.02
2003	8.46
2004	7.49
2005	7.71
2006	7.68
2007	7.81
2008	7.92
2009	8.19
2010	8.21
2011	7.36
2012	7.13
2013	6.98
2014	6.45
2015	5.76
2016	6.07
2017	5.88