Year	Percent
2000	82.43799
2001	82.76326
2002	83.08857
2003	83.4139
2004	83.73926
2005	84.05505
2006	84.37043
2007	84.68538
2008	84.99991
2009	85.31402
2010	85.62771
2011	85.94224
2012	86.25785
2013	86.57476
2014	86.89305
2015	87.21298
2016	87.53478
2017	87.85852
2018	88.18442
2019	88.1985
2020	88.21428
2021	88.23173
2022	88.25108