Year	Percent
2000	99.82495
2001	99.83239
2002	99.83486
2003	99.66092
2004	99.46972
2005	99.27787
2006	99.08536
2007	98.89217
2008	98.69834
2009	98.50384
2010	98.30654
2011	98.10826
2012	97.9115
2013	97.71413
2014	97.51613
2015	97.52083
2016	97.52626
2017	97.5324
2018	97.53177
2019	97.53184
2020	97.53263
2021	97.53413
2022	97.53636