Year	Percent
2000	92.1
2001	91.59
2002	91.08
2003	90.57
2004	90.06
2005	89.55
2006	89.04
2007	88.53
2008	88.02
2009	87.51
2010	87
2011	86.49
2012	85.98
2013	85.98
2014	85.98
2015	85.98