Year	Percent
2000	99.73975
2001	99.7395
2002	99.73965
2003	99.71942
2004	99.699
2005	99.67837
2006	99.65755
2007	99.63653
2008	99.61532
2009	99.5939
2010	99.57228
2011	99.55045
2012	99.52844
2013	99.50633
2014	99.48416
2015	99.46199
2016	99.43986
2017	99.41781
2018	99.39586
2019	99.39582
2020	99.39596
2021	99.39628
2022	99.39678