Year	Percent
2000	97.21169
2001	97.14734
2002	97.08263
2003	97.01741
2004	96.95181
2005	96.88584
2006	96.8196
2007	96.75351
2008	96.68714
2009	96.62051
2010	96.5536
2011	96.48642
2012	96.41896
2013	96.35124
2014	96.28324
2015	96.21498
2016	96.14644
2017	96.07744
2018	96.00794
2019	96.0041
2020	96.00006
2021	95.99583
2022	95.99141