Year	Percent
2000	99.95867
2001	99.95673
2002	99.95479
2003	99.95285
2004	99.95091
2005	99.94897
2006	99.94704
2007	99.9451
2008	99.94316
2009	99.94122
2010	99.93928
2011	99.93734
2012	99.93541
2013	99.93347
2014	99.93153
2015	99.92959
2016	99.92765
2017	99.92571
2018	99.92378
2019	99.92184
2020	99.9199
2021	99.9199
2022	99.9199