Year	Percent
2000	84.60442
2001	84.80258
2002	85.00045
2003	85.21033
2004	85.42409
2005	85.63744
2006	85.8504
2007	86.06296
2008	86.27512
2009	86.48658
2010	86.69795
2011	86.90892
2012	87.12346
2013	87.34111
2014	87.56224
2015	87.78612
2016	88.01284
2017	88.24222
2018	88.4738
2019	88.70742
2020	88.94291
2021	89.18008
2022	89.41853