Year	Percent
2000	98.3686
2001	98.41415
2002	98.4597
2003	98.50525
2004	98.55079
2005	98.50267
2006	98.45445
2007	98.40615
2008	98.35776
2009	98.30929
2010	98.26073
2011	98.21208
2012	98.16335
2013	98.11453
2014	98.06562
2015	98.01663
2016	97.96755
2017	97.91838
2018	97.86913
2019	97.81979
2020	97.77036
2021	97.72085
2022	97.76566