Year	Percent
2000	90.54518
2001	90.48185
2002	90.41756
2003	90.35136
2004	90.28431
2005	90.21656
2006	90.14873
2007	90.08318
2008	90.01711
2009	89.95046
2010	89.88328
2011	89.81554
2012	89.74721
2013	89.67837
2014	89.60895
2015	89.53902
2016	89.46846
2017	89.3966
2018	89.32326
2019	89.30739
2020	89.29065
2021	89.27317
2022	89.25487