Year	Percent
2000	89.65234
2001	90.05271
2002	89.91227
2003	89.76705
2004	89.61703
2005	89.46223
2006	89.30265
2007	89.13827
2008	88.96911
2009	88.79516
2010	88.61642
2011	88.43289
2012	88.24458
2013	88.05148
2014	87.85359
2015	88.22285
2016	88.22285
2017	88.22285
2018	88.22285
2019	88.22285