Year	Percent
2000	77.60432
2001	78.14059
2002	78.67686
2003	79.21312
2004	79.74939
2005	80.37329
2006	80.99836
2007	81.6246
2008	82.25201
2009	82.88059
2010	83.51034
2011	84.14126
2012	84.77336
2013	85.40662
2014	86.04106
2015	86.67666
2016	87.31344
2017	87.95138
2018	88.5905
2019	89.23079
2020	89.87225
2021	91.2801
2022	91.83094