Year	Percent
2000	99.87273
2001	99.87244
2002	99.87216
2003	99.87188
2004	99.8716
2005	99.87133
2006	99.87105
2007	99.87078
2008	99.87051
2009	99.87024
2010	99.87054
2011	99.848
2012	99.8259
2013	99.80424
2014	99.78305
2015	99.76232
2016	99.74208
2017	99.72235
2018	99.70313
2019	99.68444
2020	99.66627
2021	99.64867
2022	99.63161