Year	Percent
2000	99.46703
2001	99.46703
2002	99.46703
2003	99.46703
2004	99.33715
2005	99.18122
2006	99.02541
2007	98.86972
2008	98.71415
2009	98.55871
2010	98.40338
2011	98.24818
2012	98.09311
2013	97.93815
2014	97.78332
2015	97.6286
2016	97.47401
2017	97.31955
2018	97.1652
2019	97.01098
2020	97.34886
2021	98.14326
2022	98.06971