Year	Percent
2000	82.96849
2001	83.18801
2002	83.40754
2003	83.62706
2004	83.84659
2005	84.06612
2006	84.00086
2007	83.93413
2008	83.86591
2009	83.7962
2010	83.72502
2011	83.65235
2012	83.57819
2013	83.50255
2014	83.42543
2015	83.34683
2016	83.26674
2017	83.18517
2018	83.10212
2019	83.01758
2020	82.93156
2021	82.84405
2022	82.75507