Year	Percent
2000	99.88939
2001	99.88932
2002	99.88936
2003	99.88154
2004	99.87374
2005	99.86594
2006	99.85816
2007	99.85039
2008	99.84263
2009	99.83489
2010	99.82715
2011	99.81942
2012	99.81172
2013	99.80399
2014	99.79626
2015	99.78852
2016	99.78076
2017	99.77299
2018	99.76518
2019	99.76519
2020	99.76517
2021	99.76513
2022	99.76506