Year	Percent
2000	80.28567
2001	80.68665
2002	81.0852
2003	81.49766
2004	81.91303
2005	82.32221
2006	82.46542
2007	82.59924
2008	82.7237
2009	82.83876
2010	82.94455
2011	83.04115
2012	83.12863
2013	83.20702
2014	83.2764
2015	83.3371
2016	83.38944
2017	83.43375
2018	83.47036
2019	83.4996
2020	83.52181
2021	83.53727
2022	83.54633