Year	Percent
2000	100
2001	99.99956
2002	99.99661
2003	99.99367
2004	99.99072
2005	99.98778
2006	99.98483
2007	99.98188
2008	99.97894
2009	99.97599
2010	99.97304
2011	99.9701
2012	99.96715
2013	99.96421
2014	99.96126
2015	99.95831
2016	99.95537
2017	99.95242
2018	99.94947
2019	99.94653
2020	99.94358
2021	99.94064
2022	99.93769