Year	Percent
2000	86.3758
2001	86.46348
2002	86.95494
2003	86.98492
2004	87.21539
2005	86.52371
2006	87.13856
2007	88.34805
2008	88.87789
2009	88.02635
2010	88.6432
2011	89.55222
2012	90.25145
2013	89.67216
2014	88.6842
2015	89.52823
2016	90.5685
2017	90.41