Year	Percent
2000	82.71111
2001	82.6648
2002	82.61695
2003	82.56755
2004	82.51662
2005	82.46414
2006	82.41012
2007	82.35456
2008	82.29746
2009	82.23881
2010	82.17863
2011	82.1169
2012	82.05363
2013	81.98882
2014	81.92247
2015	81.85457
2016	81.78514
2017	81.71416
2018	81.64164
2019	81.56758
2020	81.49198
2021	81.41484
2022	81.6294