Year	Percent
2000	80.56861
2001	80.66126
2002	80.75357
2003	81.13276
2004	81.50455
2005	81.86852
2006	82.22536
2007	82.58306
2008	82.98289
2009	83.37324
2010	83.75477
2011	84.12801
2012	84.49298
2013	84.84975
2014	85.19896
2015	85.54079
2016	85.87373
2017	86.19786
2018	86.51366
2019	86.82161
2020	87.12199
2021	87.39151
2022	87.55278