Year	Percent
2000	99.2071
2001	99.19317
2002	99.17742
2003	99.16164
2004	99.14582
2005	99.12997
2006	99.11413
2007	99.09826
2008	99.08229
2009	99.06624
2010	99.0501
2011	99.03382
2012	99.01735
2013	99.0007
2014	98.98386
2015	98.96687
2016	98.94971
2017	98.93238
2018	98.91491
2019	98.89729
2020	98.87954
2021	98.86167
2022	98.86081