Year	Percent
2000	100
2001	100
2002	100
2003	100
2004	100
2005	100
2006	100
2007	100
2008	99.99051
2009	99.97811
2010	99.9657
2011	99.95329
2012	99.94088
2013	99.92847
2014	99.91606
2015	99.90365
2016	99.89124
2017	99.87883
2018	99.86642
2019	99.85401
2020	99.8416
2021	99.82919
2022	99.81678