Year	Percent
2000	99.16086
2001	99.15687
2002	99.15295
2003	99.14909
2004	99.1453
2005	99.14157
2006	99.1379
2007	99.13433
2008	99.13086
2009	99.12748
2010	99.1242
2011	99.121
2012	99.1179
2013	99.11488
2014	99.11194
2015	99.10909
2016	99.10632
2017	99.10363
2018	99.10102
2019	99.09848
2020	99.09601
2021	99.09363
2022	99.09131