Year	Percent
2000	98.04373
2001	98.04296
2002	98.03961
2003	98.03628
2004	98.03297
2005	98.02914
2006	98.02482
2007	98.02054
2008	98.01629
2009	98.01207
2010	98.0084
2011	98.00476
2012	98.00215
2013	97.99991
2014	97.99768
2015	97.99546
2016	97.99318
2017	97.99088
2018	97.98852
2019	97.98614
2020	97.98371
2021	97.98124
2022	97.97874