Year	Percent
2000	89.73011
2001	90.02494
2002	90.31555
2003	90.60196
2004	90.88416
2005	91.16215
2006	91.43593
2007	91.70551
2008	91.97088
2009	92.23205
2010	92.489
2011	92.1573
2012	91.8256
2013	91.49389
2014	91.49389
2015	91.49389
2016	91.49389
2017	91.49389