Year	Percent
2000	90.87019
2001	90.64561
2002	90.4213
2003	90.19725
2004	89.97346
2005	89.74994
2006	89.52668
2007	89.30368
2008	89.08095
2009	88.85848
2010	88.63628
2011	88.41434
2012	88.19266
2013	87.97124
2014	87.75009
2015	87.5292
2016	87.30858
2017	87.08822
2018	86.86812
2019	86.64829
2020	86.42872
2021	86.29354
2022	86.15835