Year	Percent
2000	99.95531
2001	99.94164
2002	99.92797
2003	99.87514
2004	99.79814
2005	99.72116
2006	99.6442
2007	99.56726
2008	99.49033
2009	99.41342
2010	99.33652
2011	99.25965
2012	99.18279
2013	99.10595
2014	99.02912
2015	99.01555
2016	99.00198
2017	98.98841
2018	98.97484
2019	98.96127
2020	98.94771
2021	98.93414
2022	98.92057