Year	Percent
2000	83.63807
2001	83.64988
2002	83.66169
2003	83.67349
2004	83.646
2005	83.6185
2006	83.59099
2007	83.56346
2008	83.53593
2009	83.50838
2010	83.48083
2011	83.45326
2012	83.42568
2013	83.39809
2014	83.37049
2015	83.34287
2016	83.31525
2017	83.28761
2018	83.25997
2019	83.23231
2020	83.23231
2021	83.23231
2022	83.23231