Year	Percent
2000	98.82757
2001	98.80656
2002	98.75599
2003	98.67508
2004	98.59421
2005	98.51336
2006	98.43253
2007	98.35173
2008	98.27096
2009	98.19021
2010	98.10949
2011	98.02879
2012	97.94812
2013	97.86747
2014	97.78685
2015	97.70625
2016	97.62568
2017	97.54514
2018	97.46462
2019	97.38412
2020	97.30366
2021	97.30366
2022	97.30366