Year	Percent
2000	99.25
2001	99.2317
2002	99.21123
2003	99.19076
2004	99.17029
2005	99.14982
2006	99.12934
2007	99.10887
2008	99.0884
2009	99.06793
2010	99.04746
2011	99.02699
2012	99.00652
2013	98.98605
2014	98.96558
2015	98.94511
2016	98.92463
2017	98.90416
2018	98.88369
2019	98.86322
2020	98.84275
2021	98.82228
2022	98.82228