Year	Percent
2000	99.22967
2001	99.21639
2002	99.20468
2003	99.19442
2004	99.18561
2005	99.17825
2006	99.17232
2007	99.16782
2008	99.16474
2009	99.16306
2010	99.16277
2011	99.16387
2012	99.16633
2013	99.17012
2014	99.17522
2015	99.18161
2016	99.18926
2017	99.19817
2018	99.20828
2019	99.21959
2020	99.23207
2021	99.24568
2022	99.26041