Year	Percent
2000	99.80612
2001	99.80583
2002	99.81139
2003	99.81698
2004	99.82258
2005	99.8282
2006	99.83384
2007	99.8395
2008	99.84518
2009	99.85088
2010	99.8566
2011	99.86234
2012	99.86818
2013	99.87411
2014	99.88001
2015	99.8801
2016	99.88017
2017	99.88026
2018	99.88036
2019	99.88047
2020	99.88059
2021	99.88072
2022	99.88086